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authorpolwex <polwex@sortug.com>2025-10-05 21:56:51 +0700
committerpolwex <polwex@sortug.com>2025-10-05 21:56:51 +0700
commitfcedfddf00b3f994e4f4e40332ac7fc192c63244 (patch)
tree51d38e62c7bdfcc5f9a5e9435fe820c93cfc9a3d /vere/ext/nasm/output/outelf.c
claude is gud
Diffstat (limited to 'vere/ext/nasm/output/outelf.c')
-rw-r--r--vere/ext/nasm/output/outelf.c3672
1 files changed, 3672 insertions, 0 deletions
diff --git a/vere/ext/nasm/output/outelf.c b/vere/ext/nasm/output/outelf.c
new file mode 100644
index 0000000..ad8d210
--- /dev/null
+++ b/vere/ext/nasm/output/outelf.c
@@ -0,0 +1,3672 @@
+/* ----------------------------------------------------------------------- *
+ *
+ * Copyright 1996-2022 The NASM Authors - All Rights Reserved
+ * See the file AUTHORS included with the NASM distribution for
+ * the specific copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * Common code for outelf32 and outelf64
+ */
+
+#include "compiler.h"
+
+
+#include "nasm.h"
+#include "nasmlib.h"
+#include "error.h"
+#include "saa.h"
+#include "raa.h"
+#include "stdscan.h"
+#include "eval.h"
+#include "outform.h"
+#include "outlib.h"
+#include "rbtree.h"
+#include "hashtbl.h"
+#include "ver.h"
+
+#include "dwarf.h"
+#include "stabs.h"
+#include "outelf.h"
+#include "elf.h"
+
+#if defined(OF_ELF32) || defined(OF_ELF64) || defined(OF_ELFX32)
+
+#define SECT_DELTA 32
+static struct elf_section **sects;
+static int nsects, sectlen;
+
+#define SHSTR_DELTA 256
+static char *shstrtab;
+static int shstrtablen, shstrtabsize;
+
+static struct SAA *syms;
+static uint32_t nlocals, nglobs, ndebugs; /* Symbol counts */
+
+static int32_t def_seg;
+
+static struct RAA *bsym;
+
+static struct SAA *symtab, *symtab_shndx;
+
+static struct SAA *strs;
+static uint32_t strslen;
+
+static struct RAA *section_by_index;
+static struct hash_table section_by_name;
+
+static struct elf_symbol *fwds;
+
+static char elf_module[FILENAME_MAX];
+static char elf_dir[FILENAME_MAX];
+
+extern const struct ofmt of_elf32;
+extern const struct ofmt of_elf64;
+extern const struct ofmt of_elfx32;
+
+static struct ELF_SECTDATA {
+ void *data;
+ int64_t len;
+ bool is_saa;
+} *elf_sects;
+
+static int elf_nsect, nsections;
+static int64_t elf_foffs;
+
+static void elf_write(void);
+static void elf_sect_write(struct elf_section *, const void *, size_t);
+static void elf_sect_writeaddr(struct elf_section *, int64_t, size_t);
+static void elf_section_header(int name, int type, uint64_t flags,
+ void *data, bool is_saa, uint64_t datalen,
+ int link, int info,
+ uint64_t align, uint64_t entsize);
+static void elf_write_sections(void);
+static size_t elf_build_symtab(void);
+static int add_sectname(const char *, const char *);
+
+/* First debugging section index */
+static int sec_debug;
+
+struct symlininfo {
+ int offset;
+ int section; /* index into sects[] */
+ int segto; /* internal section number */
+ char *name; /* shallow-copied pointer of section name */
+};
+
+struct linelist {
+ struct linelist *next;
+ struct linelist *last;
+ struct symlininfo info;
+ char *filename;
+ int line;
+};
+
+struct sectlist {
+ struct SAA *psaa;
+ int section;
+ int line;
+ int offset;
+ int file;
+ struct sectlist *next;
+ struct sectlist *last;
+};
+
+/* common debug variables */
+static int currentline = 1;
+static int debug_immcall = 0;
+
+/* stabs debug variables */
+static struct linelist *stabslines = 0;
+static int numlinestabs = 0;
+static char *stabs_filename = 0;
+static uint8_t *stabbuf = 0, *stabstrbuf = 0, *stabrelbuf = 0;
+static int stablen, stabstrlen, stabrellen;
+
+/* dwarf debug variables */
+static struct linelist *dwarf_flist = 0, *dwarf_clist = 0, *dwarf_elist = 0;
+static struct sectlist *dwarf_fsect = 0, *dwarf_csect = 0, *dwarf_esect = 0;
+static int dwarf_numfiles = 0, dwarf_nsections;
+static uint8_t *arangesbuf = 0, *arangesrelbuf = 0, *pubnamesbuf = 0, *infobuf = 0, *inforelbuf = 0,
+ *abbrevbuf = 0, *linebuf = 0, *linerelbuf = 0, *framebuf = 0, *locbuf = 0;
+static int8_t line_base = -5, line_range = 14, opcode_base = 13;
+static int arangeslen, arangesrellen, pubnameslen, infolen, inforellen,
+ abbrevlen, linelen, linerellen, framelen, loclen;
+static int64_t dwarf_infosym, dwarf_abbrevsym, dwarf_linesym;
+
+static struct elf_symbol *lastsym;
+
+/* common debugging routines */
+static void debug_typevalue(int32_t);
+
+/* stabs debugging routines */
+static void stabs_linenum(const char *filename, int32_t linenumber, int32_t);
+static void stabs_output(int, void *);
+static void stabs_generate(void);
+static void stabs_cleanup(void);
+
+/* dwarf debugging routines */
+
+/* This should match the order in elf_write() */
+enum dwarf_sect {
+ DWARF_ARANGES,
+ DWARF_RELA_ARANGES,
+ DWARF_PUBNAMES,
+ DWARF_INFO,
+ DWARF_RELA_INFO,
+ DWARF_ABBREV,
+ DWARF_LINE,
+ DWARF_RELA_LINE,
+ DWARF_FRAME,
+ DWARF_LOC,
+ DWARF_NSECT
+};
+
+struct dwarf_format {
+ uint16_t dwarf_version;
+ uint16_t sect_version[DWARF_NSECT];
+ /* ... add more here to generalize further */
+};
+const struct dwarf_format *dwfmt;
+
+static void dwarf32_init(void);
+static void dwarfx32_init(void);
+static void dwarf64_init(void);
+static void dwarf_linenum(const char *filename, int32_t linenumber, int32_t);
+static void dwarf_output(int, void *);
+static void dwarf_generate(void);
+static void dwarf_cleanup(void);
+static void dwarf_findfile(const char *);
+static void dwarf_findsect(const int);
+
+struct elf_format_info {
+ size_t word; /* Word size (4 or 8) */
+ size_t ehdr_size; /* Size of the ELF header */
+ size_t shdr_size; /* Size of a section header */
+ size_t sym_size; /* Size of a symbol */
+ size_t relsize; /* Size of a reltype relocation */
+ char relpfx[8]; /* Relocation section prefix */
+ uint32_t reltype; /* Relocation section type */
+ uint16_t e_machine; /* Header e_machine field */
+ uint8_t ei_class; /* ELFCLASS32 or ELFCLASS64 */
+ bool elf64; /* 64-bit ELF */
+
+ /* Write a symbol */
+ void (*elf_sym)(const struct elf_symbol *);
+
+ /* Build a relocation table */
+ struct SAA *(*elf_build_reltab)(const struct elf_reloc *);
+};
+static const struct elf_format_info *efmt;
+
+static void elf32_sym(const struct elf_symbol *sym);
+static void elf64_sym(const struct elf_symbol *sym);
+
+static struct SAA *elf32_build_reltab(const struct elf_reloc *r);
+static struct SAA *elfx32_build_reltab(const struct elf_reloc *r);
+static struct SAA *elf64_build_reltab(const struct elf_reloc *r);
+
+static bool dfmt_is_stabs(void);
+static bool dfmt_is_dwarf(void);
+
+/*
+ * Special NASM section numbers which are used to define ELF special
+ * symbols.
+ */
+static int32_t elf_gotpc_sect, elf_gotoff_sect;
+static int32_t elf_got_sect, elf_plt_sect;
+static int32_t elf_sym_sect, elf_gottpoff_sect, elf_tlsie_sect;
+
+uint8_t elf_osabi = 0; /* Default OSABI = 0 (System V or Linux) */
+uint8_t elf_abiver = 0; /* Current ABI version */
+
+/* Known sections with nonstandard defaults. -n means n*pointer size. */
+struct elf_known_section {
+ const char *name; /* Name of section */
+ int type; /* Section type (SHT_) */
+ uint32_t flags; /* Section flags (SHF_) */
+ int align; /* Section alignment */
+ int entsize; /* Entry size, if applicable */
+};
+
+static const struct elf_known_section elf_known_sections[] = {
+ { ".text", SHT_PROGBITS, SHF_ALLOC|SHF_EXECINSTR, 16, 0 },
+ { ".rodata", SHT_PROGBITS, SHF_ALLOC, 4, 0 },
+ { ".lrodata", SHT_PROGBITS, SHF_ALLOC, 4, 0 },
+ { ".data", SHT_PROGBITS, SHF_ALLOC|SHF_WRITE, 4, 0 },
+ { ".ldata", SHT_PROGBITS, SHF_ALLOC|SHF_WRITE, 4, 0 },
+ { ".bss", SHT_NOBITS, SHF_ALLOC|SHF_WRITE, 4, 0 },
+ { ".lbss", SHT_NOBITS, SHF_ALLOC|SHF_WRITE, 4, 0 },
+ { ".tdata", SHT_PROGBITS, SHF_ALLOC|SHF_WRITE|SHF_TLS, 4, 0 },
+ { ".tbss", SHT_NOBITS, SHF_ALLOC|SHF_WRITE|SHF_TLS, 4, 0 },
+ { ".comment", SHT_PROGBITS, 0, 1, 0 },
+ { ".preinit_array", SHT_PREINIT_ARRAY, SHF_ALLOC, -1, -1 },
+ { ".init_array", SHT_INIT_ARRAY, SHF_ALLOC, -1, -1 },
+ { ".fini_array", SHT_FINI_ARRAY, SHF_ALLOC, -1, -1 },
+ { ".note", SHT_NOTE, 0, 4, 0 },
+ { NULL /*default*/, SHT_PROGBITS, SHF_ALLOC, 1, 0 }
+};
+
+struct size_unit {
+ char name[8];
+ int bytes;
+ int align;
+};
+static const struct size_unit size_units[] =
+{
+ { "byte", 1, 1 },
+ { "word", 2, 2 },
+ { "dword", 4, 4 },
+ { "qword", 8, 8 },
+ { "tword", 10, 2 },
+ { "tbyte", 10, 2 },
+ { "oword", 16, 16 },
+ { "xword", 16, 16 },
+ { "yword", 32, 32 },
+ { "zword", 64, 64 },
+ { "pointer", -1, -1 },
+ { "", 0, 0 }
+};
+
+static inline size_t to_bytes(int val)
+{
+ return (val >= 0) ? (size_t)val : -val * efmt->word;
+}
+
+/* parse section attributes */
+static void elf_section_attrib(char *name, char *attr, uint32_t *flags_and, uint32_t *flags_or,
+ uint64_t *alignp, uint64_t *entsize, int *type)
+{
+ char *opt, *val, *next;
+ uint64_t align = 0;
+ uint64_t xalign = 0;
+
+ opt = nasm_skip_spaces(attr);
+ if (!opt || !*opt)
+ return;
+
+ while ((opt = nasm_opt_val(opt, &val, &next))) {
+ if (!nasm_stricmp(opt, "align")) {
+ if (!val) {
+ nasm_nonfatal("section align without value specified");
+ } else {
+ bool err;
+ uint64_t a = readnum(val, &err);
+ if (a && !is_power2(a)) {
+ nasm_error(ERR_NONFATAL,
+ "section alignment %"PRId64" is not a power of two",
+ a);
+ } else if (a > align) {
+ align = a;
+ }
+ }
+ } else if (!nasm_stricmp(opt, "alloc")) {
+ *flags_and |= SHF_ALLOC;
+ *flags_or |= SHF_ALLOC;
+ } else if (!nasm_stricmp(opt, "noalloc")) {
+ *flags_and |= SHF_ALLOC;
+ *flags_or &= ~SHF_ALLOC;
+ } else if (!nasm_stricmp(opt, "exec")) {
+ *flags_and |= SHF_EXECINSTR;
+ *flags_or |= SHF_EXECINSTR;
+ } else if (!nasm_stricmp(opt, "noexec")) {
+ *flags_and |= SHF_EXECINSTR;
+ *flags_or &= ~SHF_EXECINSTR;
+ } else if (!nasm_stricmp(opt, "write")) {
+ *flags_and |= SHF_WRITE;
+ *flags_or |= SHF_WRITE;
+ } else if (!nasm_stricmp(opt, "nowrite") ||
+ !nasm_stricmp(opt, "readonly")) {
+ *flags_and |= SHF_WRITE;
+ *flags_or &= ~SHF_WRITE;
+ } else if (!nasm_stricmp(opt, "tls")) {
+ *flags_and |= SHF_TLS;
+ *flags_or |= SHF_TLS;
+ } else if (!nasm_stricmp(opt, "notls")) {
+ *flags_and |= SHF_TLS;
+ *flags_or &= ~SHF_TLS;
+ } else if (!nasm_stricmp(opt, "merge")) {
+ *flags_and |= SHF_MERGE;
+ *flags_or |= SHF_MERGE;
+ } else if (!nasm_stricmp(opt, "nomerge")) {
+ *flags_and |= SHF_MERGE;
+ *flags_or &= ~SHF_MERGE;
+ } else if (!nasm_stricmp(opt, "strings")) {
+ *flags_and |= SHF_STRINGS;
+ *flags_or |= SHF_STRINGS;
+ } else if (!nasm_stricmp(opt, "nostrings")) {
+ *flags_and |= SHF_STRINGS;
+ *flags_or &= ~SHF_STRINGS;
+ } else if (!nasm_stricmp(opt, "progbits")) {
+ *type = SHT_PROGBITS;
+ } else if (!nasm_stricmp(opt, "nobits")) {
+ *type = SHT_NOBITS;
+ } else if (!nasm_stricmp(opt, "note")) {
+ *type = SHT_NOTE;
+ } else if (!nasm_stricmp(opt, "preinit_array")) {
+ *type = SHT_PREINIT_ARRAY;
+ } else if (!nasm_stricmp(opt, "init_array")) {
+ *type = SHT_INIT_ARRAY;
+ } else if (!nasm_stricmp(opt, "fini_array")) {
+ *type = SHT_FINI_ARRAY;
+ } else {
+ uint64_t mult;
+ size_t l;
+ const char *a = strchr(opt, '*');
+ bool err;
+ const struct size_unit *su;
+
+ if (a) {
+ l = a - opt - 1;
+ mult = readnum(a+1, &err);
+ } else {
+ l = strlen(opt);
+ mult = 1;
+ }
+
+ for (su = size_units; su->bytes; su++) {
+ if (!nasm_strnicmp(opt, su->name, l))
+ break;
+ }
+
+ if (su->bytes) {
+ *entsize = to_bytes(su->bytes) * mult;
+ xalign = to_bytes(su->align);
+ } else {
+ /* Unknown attribute */
+ nasm_warn(WARN_OTHER,
+ "unknown section attribute '%s' ignored on"
+ " declaration of section `%s'", opt, name);
+ }
+ }
+ opt = next;
+ }
+
+ switch (*type) {
+ case SHT_PREINIT_ARRAY:
+ case SHT_INIT_ARRAY:
+ case SHT_FINI_ARRAY:
+ if (!xalign)
+ xalign = efmt->word;
+ if (!*entsize)
+ *entsize = efmt->word;
+ break;
+ default:
+ break;
+ }
+
+ if (!align)
+ align = xalign;
+ if (!align)
+ align = SHA_ANY;
+
+ *alignp = align;
+}
+
+static enum directive_result
+elf_directive(enum directive directive, char *value)
+{
+ int64_t n;
+ bool err;
+ char *p;
+
+ switch (directive) {
+ case D_OSABI:
+ if (!pass_first()) /* XXX: Why? */
+ return DIRR_OK;
+
+ n = readnum(value, &err);
+ if (err) {
+ nasm_nonfatal("`osabi' directive requires a parameter");
+ return DIRR_ERROR;
+ }
+
+ if (n < 0 || n > 255) {
+ nasm_nonfatal("valid osabi numbers are 0 to 255");
+ return DIRR_ERROR;
+ }
+
+ elf_osabi = n;
+ elf_abiver = 0;
+
+ p = strchr(value,',');
+ if (!p)
+ return DIRR_OK;
+
+ n = readnum(p + 1, &err);
+ if (err || n < 0 || n > 255) {
+ nasm_nonfatal("invalid ABI version number (valid: 0 to 255)");
+ return DIRR_ERROR;
+ }
+
+ elf_abiver = n;
+ return DIRR_OK;
+
+ default:
+ return DIRR_UNKNOWN;
+ }
+}
+
+static void elf_init(void);
+
+static void elf32_init(void)
+{
+ static const struct elf_format_info ef_elf32 = {
+ 4,
+ sizeof(Elf32_Ehdr),
+ sizeof(Elf32_Shdr),
+ sizeof(Elf32_Sym),
+ sizeof(Elf32_Rel),
+ ".rel",
+ SHT_REL,
+ EM_386,
+ ELFCLASS32,
+ false,
+
+ elf32_sym,
+ elf32_build_reltab
+ };
+ efmt = &ef_elf32;
+ elf_init();
+}
+
+static void elfx32_init(void)
+{
+ static const struct elf_format_info ef_elfx32 = {
+ 4,
+ sizeof(Elf32_Ehdr),
+ sizeof(Elf32_Shdr),
+ sizeof(Elf32_Sym),
+ sizeof(Elf32_Rela),
+ ".rela",
+ SHT_RELA,
+ EM_X86_64,
+ ELFCLASS32,
+ false,
+
+ elf32_sym,
+ elfx32_build_reltab
+ };
+ efmt = &ef_elfx32;
+ elf_init();
+}
+
+static void elf64_init(void)
+{
+ static const struct elf_format_info ef_elf64 = {
+ 8,
+ sizeof(Elf64_Ehdr),
+ sizeof(Elf64_Shdr),
+ sizeof(Elf64_Sym),
+ sizeof(Elf64_Rela),
+ ".rela",
+ SHT_RELA,
+ EM_X86_64,
+ ELFCLASS64,
+ true,
+
+ elf64_sym,
+ elf64_build_reltab
+ };
+ efmt = &ef_elf64;
+ elf_init();
+}
+
+static void elf_init(void)
+{
+ static const char * const reserved_sections[] = {
+ ".shstrtab", ".strtab", ".symtab", ".symtab_shndx", NULL
+ };
+ const char * const *p;
+ const char * cur_path = nasm_realpath(inname);
+
+ strlcpy(elf_module, inname, sizeof(elf_module));
+ strlcpy(elf_dir, nasm_dirname(cur_path), sizeof(elf_dir));
+ sects = NULL;
+ nsects = sectlen = 0;
+ syms = saa_init((int32_t)sizeof(struct elf_symbol));
+ nlocals = nglobs = ndebugs = 0;
+ bsym = raa_init();
+ strs = saa_init(1L);
+ saa_wbytes(strs, "\0", 1L);
+ saa_wbytes(strs, elf_module, strlen(elf_module)+1);
+ strslen = 2 + strlen(elf_module);
+ shstrtab = NULL;
+ shstrtablen = shstrtabsize = 0;;
+ add_sectname("", ""); /* SHN_UNDEF */
+
+ fwds = NULL;
+
+ section_by_index = raa_init();
+
+ /*
+ * Add reserved section names to the section hash, with NULL
+ * as the data pointer
+ */
+ for (p = reserved_sections; *p; p++) {
+ struct hash_insert hi;
+ hash_find(&section_by_name, *p, &hi);
+ hash_add(&hi, *p, NULL);
+ }
+
+ /*
+ * FIXME: tlsie is Elf32 only and
+ * gottpoff is Elfx32|64 only.
+ */
+ elf_gotpc_sect = seg_alloc();
+ backend_label("..gotpc", elf_gotpc_sect + 1, 0L);
+ elf_gotoff_sect = seg_alloc();
+ backend_label("..gotoff", elf_gotoff_sect + 1, 0L);
+ elf_got_sect = seg_alloc();
+ backend_label("..got", elf_got_sect + 1, 0L);
+ elf_plt_sect = seg_alloc();
+ backend_label("..plt", elf_plt_sect + 1, 0L);
+ elf_sym_sect = seg_alloc();
+ backend_label("..sym", elf_sym_sect + 1, 0L);
+ elf_gottpoff_sect = seg_alloc();
+ backend_label("..gottpoff", elf_gottpoff_sect + 1, 0L);
+ elf_tlsie_sect = seg_alloc();
+ backend_label("..tlsie", elf_tlsie_sect + 1, 0L);
+
+ def_seg = seg_alloc();
+}
+
+static void elf_cleanup(void)
+{
+ struct elf_reloc *r;
+ int i;
+
+ elf_write();
+ for (i = 0; i < nsects; i++) {
+ if (sects[i]->type != SHT_NOBITS)
+ saa_free(sects[i]->data);
+ if (sects[i]->rel)
+ saa_free(sects[i]->rel);
+ while (sects[i]->head) {
+ r = sects[i]->head;
+ sects[i]->head = sects[i]->head->next;
+ nasm_free(r);
+ }
+ }
+ hash_free(&section_by_name);
+ raa_free(section_by_index);
+ nasm_free(sects);
+ saa_free(syms);
+ raa_free(bsym);
+ saa_free(strs);
+ dfmt->cleanup();
+}
+
+/*
+ * Add entry to the elf .shstrtab section and increment nsections.
+ * Returns the section index for this new section.
+ *
+ * IMPORTANT: this needs to match the order the section headers are
+ * emitted.
+ */
+static int add_sectname(const char *firsthalf, const char *secondhalf)
+{
+ int l1 = strlen(firsthalf);
+ int l2 = strlen(secondhalf);
+
+ while (shstrtablen + l1 + l2 + 1 > shstrtabsize)
+ shstrtab = nasm_realloc(shstrtab, (shstrtabsize += SHSTR_DELTA));
+
+ memcpy(shstrtab + shstrtablen, firsthalf, l1);
+ shstrtablen += l1;
+ memcpy(shstrtab + shstrtablen, secondhalf, l2+1);
+ shstrtablen += l2 + 1;
+
+ return nsections++;
+}
+
+static struct elf_section *
+elf_make_section(char *name, int type, int flags, uint64_t align)
+{
+ struct elf_section *s;
+
+ s = nasm_zalloc(sizeof(*s));
+
+ if (type != SHT_NOBITS)
+ s->data = saa_init(1L);
+ s->tail = &s->head;
+ if (!strcmp(name, ".text"))
+ s->index = def_seg;
+ else
+ s->index = seg_alloc();
+
+ s->name = nasm_strdup(name);
+ s->type = type;
+ s->flags = flags;
+ s->align = align;
+ s->shndx = add_sectname("", name);
+
+ if (nsects >= sectlen)
+ sects = nasm_realloc(sects, (sectlen += SECT_DELTA) * sizeof(*sects));
+ sects[nsects++] = s;
+
+ return s;
+}
+
+static int32_t elf_section_names(char *name, int *bits)
+{
+ char *p;
+ uint32_t flags, flags_and, flags_or;
+ uint64_t align, entsize;
+ void **hp;
+ struct elf_section *s;
+ struct hash_insert hi;
+ int type;
+
+ if (!name) {
+ *bits = ofmt->maxbits;
+ return def_seg;
+ }
+
+ p = nasm_skip_word(name);
+ if (*p)
+ *p++ = '\0';
+ flags_and = flags_or = type = align = entsize = 0;
+
+ elf_section_attrib(name, p, &flags_and, &flags_or, &align, &entsize, &type);
+
+ hp = hash_find(&section_by_name, name, &hi);
+ if (hp) {
+ s = *hp;
+ if (!s) {
+ nasm_nonfatal("attempt to redefine reserved section name `%s'", name);
+ return NO_SEG;
+ }
+ } else {
+ const struct elf_known_section *ks = elf_known_sections;
+
+ while (ks->name) {
+ if (!strcmp(name, ks->name))
+ break;
+ ks++;
+ }
+
+ type = type ? type : ks->type;
+ if (!align)
+ align = to_bytes(ks->align);
+ if (!entsize)
+ entsize = to_bytes(ks->entsize);
+ flags = (ks->flags & ~flags_and) | flags_or;
+
+ s = elf_make_section(name, type, flags, align);
+ hash_add(&hi, s->name, s);
+ section_by_index = raa_write_ptr(section_by_index, s->index >> 1, s);
+ }
+
+ if ((type && s->type != type)
+ || ((s->flags & flags_and) != flags_or)
+ || (entsize && s->entsize && entsize != s->entsize)) {
+ nasm_warn(WARN_OTHER, "incompatible section attributes ignored on"
+ " redeclaration of section `%s'", name);
+ }
+
+ if (align > s->align)
+ s->align = align;
+
+ if (entsize && !s->entsize)
+ s->entsize = entsize;
+
+ if ((flags_or & SHF_MERGE) && s->entsize == 0) {
+ if (!(s->flags & SHF_STRINGS))
+ nasm_nonfatal("section attribute merge specified without an entry size or `strings'");
+ s->entsize = 1;
+ }
+
+ return s->index;
+}
+
+static inline bool sym_type_local(int type)
+{
+ return ELF32_ST_BIND(type) == STB_LOCAL;
+}
+
+static void elf_deflabel(char *name, int32_t segment, int64_t offset,
+ int is_global, char *special)
+{
+ int pos = strslen;
+ struct elf_symbol *sym;
+ const char *spcword = nasm_skip_spaces(special);
+ int bind, type; /* st_info components */
+ const struct elf_section *sec = NULL;
+
+ if (debug_level(2)) {
+ nasm_debug(" elf_deflabel: %s, seg=%"PRIx32", off=%"PRIx64", is_global=%d, %s\n",
+ name, segment, offset, is_global, special);
+ }
+
+ if (name[0] == '.' && name[1] == '.' && name[2] != '@') {
+ /*
+ * This is a NASM special symbol. We never allow it into
+ * the ELF symbol table, even if it's a valid one. If it
+ * _isn't_ a valid one, we should barf immediately.
+ *
+ * FIXME: tlsie is Elf32 only, and gottpoff is Elfx32|64 only.
+ */
+ if (strcmp(name, "..gotpc") && strcmp(name, "..gotoff") &&
+ strcmp(name, "..got") && strcmp(name, "..plt") &&
+ strcmp(name, "..sym") && strcmp(name, "..gottpoff") &&
+ strcmp(name, "..tlsie"))
+ nasm_nonfatal("unrecognised special symbol `%s'", name);
+ return;
+ }
+
+ if (is_global == 3) {
+ struct elf_symbol **s;
+ /*
+ * Fix up a forward-reference symbol size from the first
+ * pass.
+ */
+ for (s = &fwds; *s; s = &(*s)->nextfwd)
+ if (!strcmp((*s)->name, name)) {
+ struct tokenval tokval;
+ expr *e;
+ char *p = nasm_skip_spaces(nasm_skip_word(special));
+
+ stdscan_reset();
+ stdscan_set(p);
+ tokval.t_type = TOKEN_INVALID;
+ e = evaluate(stdscan, NULL, &tokval, NULL, 1, NULL);
+ if (e) {
+ if (!is_simple(e))
+ nasm_nonfatal("cannot use relocatable"
+ " expression as symbol size");
+ else
+ (*s)->size = reloc_value(e);
+ }
+
+ /*
+ * Remove it from the list of unresolved sizes.
+ */
+ nasm_free((*s)->name);
+ *s = (*s)->nextfwd;
+ return;
+ }
+ return; /* it wasn't an important one */
+ }
+
+ saa_wbytes(strs, name, (int32_t)(1 + strlen(name)));
+ strslen += 1 + strlen(name);
+
+ lastsym = sym = saa_wstruct(syms);
+
+ memset(&sym->symv, 0, sizeof(struct rbtree));
+
+ sym->strpos = pos;
+ bind = is_global ? STB_GLOBAL : STB_LOCAL;
+ type = STT_NOTYPE;
+ sym->other = STV_DEFAULT;
+ sym->size = 0;
+ if (segment == NO_SEG) {
+ sym->section = XSHN_ABS;
+ } else {
+ sym->section = XSHN_UNDEF;
+ if (segment == def_seg) {
+ /* we have to be sure at least text section is there */
+ int tempint;
+ if (segment != elf_section_names(".text", &tempint))
+ nasm_panic("strange segment conditions in ELF driver");
+ }
+ sec = raa_read_ptr(section_by_index, segment >> 1);
+ if (sec)
+ sym->section = sec->shndx;
+ }
+
+ if (is_global == 2) {
+ sym->size = offset;
+ sym->symv.key = 0;
+ sym->section = XSHN_COMMON;
+ /*
+ * We have a common variable. Check the special text to see
+ * if it's a valid number and power of two; if so, store it
+ * as the alignment for the common variable.
+ *
+ * XXX: this should allow an expression.
+ */
+ if (spcword) {
+ bool err;
+ sym->symv.key = readnum(spcword, &err);
+ if (err)
+ nasm_nonfatal("alignment constraint `%s' is not a"
+ " valid number", special);
+ else if (!is_power2(sym->symv.key))
+ nasm_nonfatal("alignment constraint `%s' is not a"
+ " power of two", special);
+ spcword = nasm_skip_spaces(nasm_skip_word(spcword));
+ }
+ } else {
+ sym->symv.key = (sym->section == XSHN_UNDEF ? 0 : offset);
+ }
+
+ if (spcword && *spcword) {
+ const char *wend;
+ bool ok = true;
+
+ while (ok) {
+ size_t wlen;
+ wend = nasm_skip_word(spcword);
+ wlen = wend - spcword;
+
+ switch (wlen) {
+ case 4:
+ if (!nasm_strnicmp(spcword, "data", wlen))
+ type = STT_OBJECT;
+ else if (!nasm_strnicmp(spcword, "weak", wlen))
+ bind = STB_WEAK;
+ else
+ ok = false;
+ break;
+
+ case 6:
+ if (!nasm_strnicmp(spcword, "notype", wlen))
+ type = STT_NOTYPE;
+ else if (!nasm_strnicmp(spcword, "object", wlen))
+ type = STT_OBJECT;
+ else if (!nasm_strnicmp(spcword, "hidden", wlen))
+ sym->other = STV_HIDDEN;
+ else if (!nasm_strnicmp(spcword, "strong", wlen))
+ bind = STB_GLOBAL;
+ else
+ ok = false;
+ break;
+
+ case 7:
+ if (!nasm_strnicmp(spcword, "default", wlen))
+ sym->other = STV_DEFAULT;
+ else
+ ok = false;
+ break;
+
+ case 8:
+ if (!nasm_strnicmp(spcword, "function", wlen))
+ type = STT_FUNC;
+ else if (!nasm_stricmp(spcword, "internal"))
+ sym->other = STV_INTERNAL;
+ else
+ ok = false;
+ break;
+
+ case 9:
+ if (!nasm_strnicmp(spcword, "protected", wlen))
+ sym->other = STV_PROTECTED;
+ else
+ ok = false;
+ break;
+
+ default:
+ ok = false;
+ break;
+ }
+
+ if (ok)
+ spcword = nasm_skip_spaces(wend);
+ }
+ if (!is_global && bind != STB_LOCAL) {
+ nasm_nonfatal("weak and strong only applies to global symbols");
+ bind = STB_LOCAL;
+ }
+
+ if (spcword && *spcword) {
+ struct tokenval tokval;
+ expr *e;
+ int fwd = 0;
+ char *saveme = stdscan_get();
+
+ /*
+ * We have a size expression; attempt to
+ * evaluate it.
+ */
+ stdscan_reset();
+ stdscan_set((char *)spcword);
+ tokval.t_type = TOKEN_INVALID;
+ e = evaluate(stdscan, NULL, &tokval, &fwd, 0, NULL);
+ if (fwd) {
+ sym->nextfwd = fwds;
+ fwds = sym;
+ sym->name = nasm_strdup(name);
+ } else if (e) {
+ if (!is_simple(e))
+ nasm_nonfatal("cannot use relocatable"
+ " expression as symbol size");
+ else
+ sym->size = reloc_value(e);
+ }
+ stdscan_set(saveme);
+ }
+ }
+
+ /*
+ * If it is in a TLS segment, mark symbol accordingly.
+ */
+ if (sec && (sec->flags & SHF_TLS))
+ type = STT_TLS;
+
+ /* Note: ELF32_ST_INFO() and ELF64_ST_INFO() are identical */
+ sym->type = ELF32_ST_INFO(bind, type);
+
+ if (sym_type_local(sym->type)) {
+ nlocals++;
+ } else {
+ /*
+ * If sym->section == SHN_ABS, then the first line of the
+ * else section would cause a core dump, because its a reference
+ * beyond the end of the section array.
+ * This behaviour is exhibited by this code:
+ * GLOBAL crash_nasm
+ * crash_nasm equ 0
+ * To avoid such a crash, such requests are silently discarded.
+ * This may not be the best solution.
+ */
+ if (sym->section == XSHN_UNDEF || sym->section == XSHN_COMMON) {
+ bsym = raa_write(bsym, segment, nglobs);
+ } else if (sym->section != XSHN_ABS) {
+ /*
+ * This is a global symbol; so we must add it to the rbtree
+ * of global symbols in its section.
+ *
+ * In addition, we check the special text for symbol
+ * type and size information.
+ */
+ sects[sym->section-1]->gsyms =
+ rb_insert(sects[sym->section-1]->gsyms, &sym->symv);
+
+ }
+ sym->globnum = nglobs;
+ nglobs++;
+ }
+}
+
+static void elf_add_reloc(struct elf_section *sect, int32_t segment,
+ int64_t offset, int type)
+{
+ struct elf_reloc *r;
+
+ r = *sect->tail = nasm_zalloc(sizeof(struct elf_reloc));
+ sect->tail = &r->next;
+
+ r->address = sect->len;
+ r->offset = offset;
+
+ if (segment != NO_SEG) {
+ const struct elf_section *s;
+ s = raa_read_ptr(section_by_index, segment >> 1);
+ if (s)
+ r->symbol = s->shndx + 1;
+ else
+ r->symbol = GLOBAL_TEMP_BASE + raa_read(bsym, segment);
+ }
+ r->type = type;
+
+ sect->nrelocs++;
+}
+
+/*
+ * This routine deals with ..got and ..sym relocations: the more
+ * complicated kinds. In shared-library writing, some relocations
+ * with respect to global symbols must refer to the precise symbol
+ * rather than referring to an offset from the base of the section
+ * _containing_ the symbol. Such relocations call to this routine,
+ * which searches the symbol list for the symbol in question.
+ *
+ * R_386_GOT32 | R_X86_64_GOT32 references require the _exact_ symbol address to be
+ * used; R_386_32 | R_X86_64_32 references can be at an offset from the symbol.
+ * The boolean argument `exact' tells us this.
+ *
+ * Return value is the adjusted value of `addr', having become an
+ * offset from the symbol rather than the section. Should always be
+ * zero when returning from an exact call.
+ *
+ * Limitation: if you define two symbols at the same place,
+ * confusion will occur.
+ *
+ * Inefficiency: we search, currently, using a linked list which
+ * isn't even necessarily sorted.
+ */
+static int64_t elf_add_gsym_reloc(struct elf_section *sect,
+ int32_t segment, uint64_t offset,
+ int64_t pcrel, int type, bool exact)
+{
+ struct elf_reloc *r;
+ struct elf_section *s;
+ struct elf_symbol *sym;
+ struct rbtree *srb;
+
+ /*
+ * First look up the segment/offset pair and find a global
+ * symbol corresponding to it. If it's not one of our segments,
+ * then it must be an external symbol, in which case we're fine
+ * doing a normal elf_add_reloc after first sanity-checking
+ * that the offset from the symbol is zero.
+ */
+ s = raa_read_ptr(section_by_index, segment >> 1);
+ if (!s) {
+ if (exact && offset)
+ nasm_nonfatal("invalid access to an external symbol");
+ else
+ elf_add_reloc(sect, segment, offset - pcrel, type);
+ return 0;
+ }
+
+ srb = rb_search(s->gsyms, offset);
+ if (!srb || (exact && srb->key != offset)) {
+ nasm_nonfatal("unable to find a suitable global symbol"
+ " for this reference");
+ return 0;
+ }
+ sym = container_of(srb, struct elf_symbol, symv);
+
+ r = *sect->tail = nasm_malloc(sizeof(struct elf_reloc));
+ sect->tail = &r->next;
+
+ r->next = NULL;
+ r->address = sect->len;
+ r->offset = offset - pcrel - sym->symv.key;
+ r->symbol = GLOBAL_TEMP_BASE + sym->globnum;
+ r->type = type;
+
+ sect->nrelocs++;
+ return r->offset;
+}
+
+static void elf32_out(int32_t segto, const void *data,
+ enum out_type type, uint64_t size,
+ int32_t segment, int32_t wrt)
+{
+ struct elf_section *s;
+ int64_t addr;
+ int reltype, bytes;
+ static struct symlininfo sinfo;
+
+ /*
+ * handle absolute-assembly (structure definitions)
+ */
+ if (segto == NO_SEG) {
+ if (type != OUT_RESERVE)
+ nasm_nonfatal("attempt to assemble code in [ABSOLUTE] space");
+ return;
+ }
+
+ s = raa_read_ptr(section_by_index, segto >> 1);
+ if (!s) {
+ int tempint; /* ignored */
+ if (segto != elf_section_names(".text", &tempint))
+ nasm_panic("strange segment conditions in ELF driver");
+ else
+ s = sects[nsects - 1];
+ }
+
+ /* again some stabs debugging stuff */
+ sinfo.offset = s->len;
+ /* Adjust to an index of the section table. */
+ sinfo.section = s->shndx - 1;
+ sinfo.segto = segto;
+ sinfo.name = s->name;
+ dfmt->debug_output(TY_DEBUGSYMLIN, &sinfo);
+ /* end of debugging stuff */
+
+ if (s->type == SHT_NOBITS && type != OUT_RESERVE) {
+ nasm_warn(WARN_OTHER, "attempt to initialize memory in"
+ " BSS section `%s': ignored", s->name);
+ s->len += realsize(type, size);
+ return;
+ }
+
+ switch (type) {
+ case OUT_RESERVE:
+ if (s->type != SHT_NOBITS) {
+ nasm_warn(WARN_ZEROING, "uninitialized space declared in"
+ " non-BSS section `%s': zeroing", s->name);
+ elf_sect_write(s, NULL, size);
+ } else
+ s->len += size;
+ break;
+
+ case OUT_RAWDATA:
+ elf_sect_write(s, data, size);
+ break;
+
+ case OUT_ADDRESS:
+ {
+ bool err = false;
+ int asize = abs((int)size);
+
+ addr = *(int64_t *)data;
+ if (segment != NO_SEG) {
+ if (segment & 1) {
+ nasm_nonfatal("ELF format does not support"
+ " segment base references");
+ } else {
+ if (wrt == NO_SEG) {
+ /*
+ * The if() is a hack to deal with compilers which
+ * don't handle switch() statements with 64-bit
+ * expressions.
+ */
+ switch (asize) {
+ case 1:
+ elf_add_reloc(s, segment, 0, R_386_8);
+ break;
+ case 2:
+ elf_add_reloc(s, segment, 0, R_386_16);
+ break;
+ case 4:
+ elf_add_reloc(s, segment, 0, R_386_32);
+ break;
+ default: /* Error issued further down */
+ err = true;
+ break;
+ }
+ } else if (wrt == elf_gotpc_sect + 1) {
+ /*
+ * The user will supply GOT relative to $$. ELF
+ * will let us have GOT relative to $. So we
+ * need to fix up the data item by $-$$.
+ */
+ err = asize != 4;
+ addr += s->len;
+ elf_add_reloc(s, segment, 0, R_386_GOTPC);
+ } else if (wrt == elf_gotoff_sect + 1) {
+ err = asize != 4;
+ elf_add_reloc(s, segment, 0, R_386_GOTOFF);
+ } else if (wrt == elf_tlsie_sect + 1) {
+ err = asize != 4;
+ addr = elf_add_gsym_reloc(s, segment, addr, 0,
+ R_386_TLS_IE, true);
+ } else if (wrt == elf_got_sect + 1) {
+ err = asize != 4;
+ addr = elf_add_gsym_reloc(s, segment, addr, 0,
+ R_386_GOT32, true);
+ } else if (wrt == elf_sym_sect + 1) {
+ switch (asize) {
+ case 1:
+ addr = elf_add_gsym_reloc(s, segment, addr, 0,
+ R_386_8, false);
+ break;
+ case 2:
+ addr = elf_add_gsym_reloc(s, segment, addr, 0,
+ R_386_16, false);
+ break;
+ case 4:
+ addr = elf_add_gsym_reloc(s, segment, addr, 0,
+ R_386_32, false);
+ break;
+ default:
+ err = true;
+ break;
+ }
+ } else if (wrt == elf_plt_sect + 1) {
+ nasm_nonfatal("ELF format cannot produce non-PC-"
+ "relative PLT references");
+ } else {
+ nasm_nonfatal("ELF format does not support this"
+ " use of WRT");
+ wrt = NO_SEG; /* we can at least _try_ to continue */
+ }
+ }
+ }
+
+ if (err) {
+ nasm_nonfatal("Unsupported %d-bit ELF relocation", asize << 3);
+ }
+ elf_sect_writeaddr(s, addr, asize);
+ break;
+ }
+
+ case OUT_REL1ADR:
+ reltype = R_386_PC8;
+ bytes = 1;
+ goto rel12adr;
+ case OUT_REL2ADR:
+ reltype = R_386_PC16;
+ bytes = 2;
+ goto rel12adr;
+
+rel12adr:
+ addr = *(int64_t *)data - size;
+ nasm_assert(segment != segto);
+ if (segment != NO_SEG && (segment & 1)) {
+ nasm_nonfatal("ELF format does not support"
+ " segment base references");
+ } else {
+ if (wrt == NO_SEG) {
+ elf_add_reloc(s, segment, 0, reltype);
+ } else {
+ nasm_nonfatal("Unsupported %d-bit ELF relocation", bytes << 3);
+ }
+ }
+ elf_sect_writeaddr(s, addr, bytes);
+ break;
+
+ case OUT_REL4ADR:
+ addr = *(int64_t *)data - size;
+ if (segment == segto)
+ nasm_panic("intra-segment OUT_REL4ADR");
+ if (segment != NO_SEG && (segment & 1)) {
+ nasm_nonfatal("ELF format does not support"
+ " segment base references");
+ } else {
+ if (wrt == NO_SEG) {
+ elf_add_reloc(s, segment, 0, R_386_PC32);
+ } else if (wrt == elf_plt_sect + 1) {
+ elf_add_reloc(s, segment, 0, R_386_PLT32);
+ } else if (wrt == elf_gotpc_sect + 1 ||
+ wrt == elf_gotoff_sect + 1 ||
+ wrt == elf_got_sect + 1) {
+ nasm_nonfatal("ELF format cannot produce PC-"
+ "relative GOT references");
+ } else {
+ nasm_nonfatal("ELF format does not support this"
+ " use of WRT");
+ wrt = NO_SEG; /* we can at least _try_ to continue */
+ }
+ }
+ elf_sect_writeaddr(s, addr, 4);
+ break;
+
+ case OUT_REL8ADR:
+ nasm_nonfatal("32-bit ELF format does not support 64-bit relocations");
+ addr = 0;
+ elf_sect_writeaddr(s, addr, 8);
+ break;
+
+ default:
+ panic();
+ }
+}
+static void elf64_out(int32_t segto, const void *data,
+ enum out_type type, uint64_t size,
+ int32_t segment, int32_t wrt)
+{
+ struct elf_section *s;
+ int64_t addr;
+ int reltype, bytes;
+ static struct symlininfo sinfo;
+
+ /*
+ * handle absolute-assembly (structure definitions)
+ */
+ if (segto == NO_SEG) {
+ if (type != OUT_RESERVE)
+ nasm_nonfatal("attempt to assemble code in [ABSOLUTE] space");
+ return;
+ }
+
+ s = raa_read_ptr(section_by_index, segto >> 1);
+ if (!s) {
+ int tempint; /* ignored */
+ if (segto != elf_section_names(".text", &tempint))
+ nasm_panic("strange segment conditions in ELF driver");
+ else
+ s = sects[nsects - 1];
+ }
+
+ /* again some stabs debugging stuff */
+ sinfo.offset = s->len;
+ /* Adjust to an index of the section table. */
+ sinfo.section = s->shndx - 1;
+ sinfo.segto = segto;
+ sinfo.name = s->name;
+ dfmt->debug_output(TY_DEBUGSYMLIN, &sinfo);
+ /* end of debugging stuff */
+
+ if (s->type == SHT_NOBITS && type != OUT_RESERVE) {
+ nasm_warn(WARN_OTHER, "attempt to initialize memory in"
+ " BSS section `%s': ignored", s->name);
+ s->len += realsize(type, size);
+ return;
+ }
+
+ switch (type) {
+ case OUT_RESERVE:
+ if (s->type != SHT_NOBITS) {
+ nasm_warn(WARN_ZEROING, "uninitialized space declared in"
+ " non-BSS section `%s': zeroing", s->name);
+ elf_sect_write(s, NULL, size);
+ } else
+ s->len += size;
+ break;
+
+ case OUT_RAWDATA:
+ if (segment != NO_SEG)
+ nasm_panic("OUT_RAWDATA with other than NO_SEG");
+ elf_sect_write(s, data, size);
+ break;
+
+ case OUT_ADDRESS:
+ {
+ int isize = (int)size;
+ int asize = abs((int)size);
+
+ addr = *(int64_t *)data;
+ if (segment == NO_SEG) {
+ /* Do nothing */
+ } else if (segment & 1) {
+ nasm_nonfatal("ELF format does not support"
+ " segment base references");
+ } else {
+ if (wrt == NO_SEG) {
+ switch (isize) {
+ case 1:
+ case -1:
+ elf_add_reloc(s, segment, addr, R_X86_64_8);
+ break;
+ case 2:
+ case -2:
+ elf_add_reloc(s, segment, addr, R_X86_64_16);
+ break;
+ case 4:
+ elf_add_reloc(s, segment, addr, R_X86_64_32);
+ break;
+ case -4:
+ elf_add_reloc(s, segment, addr, R_X86_64_32S);
+ break;
+ case 8:
+ case -8:
+ elf_add_reloc(s, segment, addr, R_X86_64_64);
+ break;
+ default:
+ nasm_panic("internal error elf64-hpa-871");
+ break;
+ }
+ addr = 0;
+ } else if (wrt == elf_gotpc_sect + 1) {
+ /*
+ * The user will supply GOT relative to $$. ELF
+ * will let us have GOT relative to $. So we
+ * need to fix up the data item by $-$$.
+ */
+ addr += s->len;
+ elf_add_reloc(s, segment, addr, R_X86_64_GOTPC32);
+ addr = 0;
+ } else if (wrt == elf_gotoff_sect + 1) {
+ if (asize != 8) {
+ nasm_nonfatal("ELF64 requires ..gotoff "
+ "references to be qword");
+ } else {
+ elf_add_reloc(s, segment, addr, R_X86_64_GOTOFF64);
+ addr = 0;
+ }
+ } else if (wrt == elf_got_sect + 1) {
+ switch (asize) {
+ case 4:
+ elf_add_gsym_reloc(s, segment, addr, 0,
+ R_X86_64_GOT32, true);
+ addr = 0;
+ break;
+ case 8:
+ elf_add_gsym_reloc(s, segment, addr, 0,
+ R_X86_64_GOT64, true);
+ addr = 0;
+ break;
+ default:
+ nasm_nonfatal("invalid ..got reference");
+ break;
+ }
+ } else if (wrt == elf_sym_sect + 1) {
+ switch (isize) {
+ case 1:
+ case -1:
+ elf_add_gsym_reloc(s, segment, addr, 0,
+ R_X86_64_8, false);
+ addr = 0;
+ break;
+ case 2:
+ case -2:
+ elf_add_gsym_reloc(s, segment, addr, 0,
+ R_X86_64_16, false);
+ addr = 0;
+ break;
+ case 4:
+ elf_add_gsym_reloc(s, segment, addr, 0,
+ R_X86_64_32, false);
+ addr = 0;
+ break;
+ case -4:
+ elf_add_gsym_reloc(s, segment, addr, 0,
+ R_X86_64_32S, false);
+ addr = 0;
+ break;
+ case 8:
+ case -8:
+ elf_add_gsym_reloc(s, segment, addr, 0,
+ R_X86_64_64, false);
+ addr = 0;
+ break;
+ default:
+ nasm_panic("internal error elf64-hpa-903");
+ break;
+ }
+ } else if (wrt == elf_plt_sect + 1) {
+ nasm_nonfatal("ELF format cannot produce non-PC-"
+ "relative PLT references");
+ } else {
+ nasm_nonfatal("ELF format does not support this"
+ " use of WRT");
+ }
+ }
+ elf_sect_writeaddr(s, addr, asize);
+ break;
+ }
+
+ case OUT_REL1ADR:
+ reltype = R_X86_64_PC8;
+ bytes = 1;
+ goto rel12adr;
+
+ case OUT_REL2ADR:
+ reltype = R_X86_64_PC16;
+ bytes = 2;
+ goto rel12adr;
+
+rel12adr:
+ addr = *(int64_t *)data - size;
+ if (segment == segto)
+ nasm_panic("intra-segment OUT_REL1ADR");
+ if (segment == NO_SEG) {
+ /* Do nothing */
+ } else if (segment & 1) {
+ nasm_nonfatal("ELF format does not support"
+ " segment base references");
+ } else {
+ if (wrt == NO_SEG) {
+ elf_add_reloc(s, segment, addr, reltype);
+ addr = 0;
+ } else {
+ nasm_nonfatal("Unsupported %d-bit ELF relocation", bytes << 3);
+ }
+ }
+ elf_sect_writeaddr(s, addr, bytes);
+ break;
+
+ case OUT_REL4ADR:
+ addr = *(int64_t *)data - size;
+ if (segment == segto)
+ nasm_panic("intra-segment OUT_REL4ADR");
+ if (segment == NO_SEG) {
+ /* Do nothing */
+ } else if (segment & 1) {
+ nasm_nonfatal("ELF64 format does not support"
+ " segment base references");
+ } else {
+ if (wrt == NO_SEG) {
+ elf_add_reloc(s, segment, addr, R_X86_64_PC32);
+ addr = 0;
+ } else if (wrt == elf_plt_sect + 1) {
+ elf_add_gsym_reloc(s, segment, addr+size, size,
+ R_X86_64_PLT32, true);
+ addr = 0;
+ } else if (wrt == elf_gotpc_sect + 1 ||
+ wrt == elf_got_sect + 1) {
+ elf_add_gsym_reloc(s, segment, addr+size, size,
+ R_X86_64_GOTPCREL, true);
+ addr = 0;
+ } else if (wrt == elf_gotoff_sect + 1 ||
+ wrt == elf_got_sect + 1) {
+ nasm_nonfatal("ELF64 requires ..gotoff references to be "
+ "qword absolute");
+ } else if (wrt == elf_gottpoff_sect + 1) {
+ elf_add_gsym_reloc(s, segment, addr+size, size,
+ R_X86_64_GOTTPOFF, true);
+ addr = 0;
+ } else {
+ nasm_nonfatal("ELF64 format does not support this"
+ " use of WRT");
+ }
+ }
+ elf_sect_writeaddr(s, addr, 4);
+ break;
+
+ case OUT_REL8ADR:
+ addr = *(int64_t *)data - size;
+ if (segment == segto)
+ nasm_panic("intra-segment OUT_REL8ADR");
+ if (segment == NO_SEG) {
+ /* Do nothing */
+ } else if (segment & 1) {
+ nasm_nonfatal("ELF64 format does not support"
+ " segment base references");
+ } else {
+ if (wrt == NO_SEG) {
+ elf_add_reloc(s, segment, addr, R_X86_64_PC64);
+ addr = 0;
+ } else if (wrt == elf_gotpc_sect + 1 ||
+ wrt == elf_got_sect + 1) {
+ elf_add_gsym_reloc(s, segment, addr+size, size,
+ R_X86_64_GOTPCREL64, true);
+ addr = 0;
+ } else if (wrt == elf_gotoff_sect + 1 ||
+ wrt == elf_got_sect + 1) {
+ nasm_nonfatal("ELF64 requires ..gotoff references to be "
+ "absolute");
+ } else if (wrt == elf_gottpoff_sect + 1) {
+ nasm_nonfatal("ELF64 requires ..gottpoff references to be "
+ "dword");
+ } else {
+ nasm_nonfatal("ELF64 format does not support this"
+ " use of WRT");
+ }
+ }
+ elf_sect_writeaddr(s, addr, 8);
+ break;
+
+ default:
+ panic();
+ }
+}
+
+static void elfx32_out(int32_t segto, const void *data,
+ enum out_type type, uint64_t size,
+ int32_t segment, int32_t wrt)
+{
+ struct elf_section *s;
+ int64_t addr;
+ int reltype, bytes;
+ static struct symlininfo sinfo;
+
+ /*
+ * handle absolute-assembly (structure definitions)
+ */
+ if (segto == NO_SEG) {
+ if (type != OUT_RESERVE)
+ nasm_nonfatal("attempt to assemble code in [ABSOLUTE] space");
+ return;
+ }
+
+ s = raa_read_ptr(section_by_index, segto >> 1);
+ if (!s) {
+ int tempint; /* ignored */
+ if (segto != elf_section_names(".text", &tempint))
+ nasm_panic("strange segment conditions in ELF driver");
+ else
+ s = sects[nsects - 1];
+ }
+
+ /* again some stabs debugging stuff */
+ sinfo.offset = s->len;
+ /* Adjust to an index of the section table. */
+ sinfo.section = s->shndx - 1;
+ sinfo.segto = segto;
+ sinfo.name = s->name;
+ dfmt->debug_output(TY_DEBUGSYMLIN, &sinfo);
+ /* end of debugging stuff */
+
+ if (s->type == SHT_NOBITS && type != OUT_RESERVE) {
+ nasm_warn(WARN_OTHER, "attempt to initialize memory in"
+ " BSS section `%s': ignored", s->name);
+ s->len += realsize(type, size);
+ return;
+ }
+
+ switch (type) {
+ case OUT_RESERVE:
+ if (s->type != SHT_NOBITS) {
+ nasm_warn(WARN_ZEROING, "uninitialized space declared in"
+ " non-BSS section `%s': zeroing", s->name);
+ elf_sect_write(s, NULL, size);
+ } else
+ s->len += size;
+ break;
+
+ case OUT_RAWDATA:
+ if (segment != NO_SEG)
+ nasm_panic("OUT_RAWDATA with other than NO_SEG");
+ elf_sect_write(s, data, size);
+ break;
+
+ case OUT_ADDRESS:
+ {
+ int isize = (int)size;
+ int asize = abs((int)size);
+
+ addr = *(int64_t *)data;
+ if (segment == NO_SEG) {
+ /* Do nothing */
+ } else if (segment & 1) {
+ nasm_nonfatal("ELF format does not support"
+ " segment base references");
+ } else {
+ if (wrt == NO_SEG) {
+ switch (isize) {
+ case 1:
+ case -1:
+ elf_add_reloc(s, segment, addr, R_X86_64_8);
+ break;
+ case 2:
+ case -2:
+ elf_add_reloc(s, segment, addr, R_X86_64_16);
+ break;
+ case 4:
+ elf_add_reloc(s, segment, addr, R_X86_64_32);
+ break;
+ case -4:
+ elf_add_reloc(s, segment, addr, R_X86_64_32S);
+ break;
+ case 8:
+ case -8:
+ elf_add_reloc(s, segment, addr, R_X86_64_64);
+ break;
+ default:
+ nasm_panic("internal error elfx32-hpa-871");
+ break;
+ }
+ addr = 0;
+ } else if (wrt == elf_gotpc_sect + 1) {
+ /*
+ * The user will supply GOT relative to $$. ELF
+ * will let us have GOT relative to $. So we
+ * need to fix up the data item by $-$$.
+ */
+ addr += s->len;
+ elf_add_reloc(s, segment, addr, R_X86_64_GOTPC32);
+ addr = 0;
+ } else if (wrt == elf_gotoff_sect + 1) {
+ nasm_nonfatal("ELFX32 doesn't support "
+ "R_X86_64_GOTOFF64");
+ } else if (wrt == elf_got_sect + 1) {
+ switch (asize) {
+ case 4:
+ elf_add_gsym_reloc(s, segment, addr, 0,
+ R_X86_64_GOT32, true);
+ addr = 0;
+ break;
+ default:
+ nasm_nonfatal("invalid ..got reference");
+ break;
+ }
+ } else if (wrt == elf_sym_sect + 1) {
+ switch (isize) {
+ case 1:
+ case -1:
+ elf_add_gsym_reloc(s, segment, addr, 0,
+ R_X86_64_8, false);
+ addr = 0;
+ break;
+ case 2:
+ case -2:
+ elf_add_gsym_reloc(s, segment, addr, 0,
+ R_X86_64_16, false);
+ addr = 0;
+ break;
+ case 4:
+ elf_add_gsym_reloc(s, segment, addr, 0,
+ R_X86_64_32, false);
+ addr = 0;
+ break;
+ case -4:
+ elf_add_gsym_reloc(s, segment, addr, 0,
+ R_X86_64_32S, false);
+ addr = 0;
+ break;
+ case 8:
+ case -8:
+ elf_add_gsym_reloc(s, segment, addr, 0,
+ R_X86_64_64, false);
+ addr = 0;
+ break;
+ default:
+ nasm_panic("internal error elfx32-hpa-903");
+ break;
+ }
+ } else if (wrt == elf_plt_sect + 1) {
+ nasm_nonfatal("ELF format cannot produce non-PC-"
+ "relative PLT references");
+ } else {
+ nasm_nonfatal("ELF format does not support this"
+ " use of WRT");
+ }
+ }
+ elf_sect_writeaddr(s, addr, asize);
+ break;
+ }
+
+ case OUT_REL1ADR:
+ reltype = R_X86_64_PC8;
+ bytes = 1;
+ goto rel12adr;
+
+ case OUT_REL2ADR:
+ reltype = R_X86_64_PC16;
+ bytes = 2;
+ goto rel12adr;
+
+rel12adr:
+ addr = *(int64_t *)data - size;
+ if (segment == segto)
+ nasm_panic("intra-segment OUT_REL1ADR");
+ if (segment == NO_SEG) {
+ /* Do nothing */
+ } else if (segment & 1) {
+ nasm_nonfatal("ELF format does not support"
+ " segment base references");
+ } else {
+ if (wrt == NO_SEG) {
+ elf_add_reloc(s, segment, addr, reltype);
+ addr = 0;
+ } else {
+ nasm_nonfatal("unsupported %d-bit ELF relocation", bytes << 3);
+ }
+ }
+ elf_sect_writeaddr(s, addr, bytes);
+ break;
+
+ case OUT_REL4ADR:
+ addr = *(int64_t *)data - size;
+ if (segment == segto)
+ nasm_panic("intra-segment OUT_REL4ADR");
+ if (segment == NO_SEG) {
+ /* Do nothing */
+ } else if (segment & 1) {
+ nasm_nonfatal("ELFX32 format does not support"
+ " segment base references");
+ } else {
+ if (wrt == NO_SEG) {
+ elf_add_reloc(s, segment, addr, R_X86_64_PC32);
+ addr = 0;
+ } else if (wrt == elf_plt_sect + 1) {
+ elf_add_gsym_reloc(s, segment, addr+size, size,
+ R_X86_64_PLT32, true);
+ addr = 0;
+ } else if (wrt == elf_gotpc_sect + 1 ||
+ wrt == elf_got_sect + 1) {
+ elf_add_gsym_reloc(s, segment, addr+size, size,
+ R_X86_64_GOTPCREL, true);
+ addr = 0;
+ } else if (wrt == elf_gotoff_sect + 1 ||
+ wrt == elf_got_sect + 1) {
+ nasm_nonfatal("invalid ..gotoff reference");
+ } else if (wrt == elf_gottpoff_sect + 1) {
+ elf_add_gsym_reloc(s, segment, addr+size, size,
+ R_X86_64_GOTTPOFF, true);
+ addr = 0;
+ } else {
+ nasm_nonfatal("ELFX32 format does not support this use of WRT");
+ }
+ }
+ elf_sect_writeaddr(s, addr, 4);
+ break;
+
+ case OUT_REL8ADR:
+ nasm_nonfatal("32-bit ELF format does not support 64-bit relocations");
+ addr = 0;
+ elf_sect_writeaddr(s, addr, 8);
+ break;
+
+ default:
+ panic();
+ }
+}
+
+/*
+ * Section index/count with a specified overflow value (usually SHN_INDEX,
+ * but 0 for e_shnum.
+ */
+static inline uint16_t elf_shndx(int section, uint16_t overflow)
+{
+ return cpu_to_le16(section < (int)SHN_LORESERVE ? section : overflow);
+}
+
+struct ehdr_common {
+ uint8_t e_ident[EI_NIDENT];
+ uint16_t e_type;
+ uint16_t e_machine;
+ uint32_t e_version;
+};
+
+union ehdr {
+ Elf32_Ehdr ehdr32;
+ Elf64_Ehdr ehdr64;
+ struct ehdr_common com;
+};
+
+static void elf_write(void)
+{
+ int align;
+ char *p;
+ int i;
+ size_t symtablocal;
+ int sec_shstrtab, sec_symtab, sec_strtab;
+ union ehdr ehdr;
+
+ /*
+ * Add any sections we don't already have:
+ * rel/rela sections for the user sections, debug sections, and
+ * the ELF special sections.
+ */
+
+ sec_debug = nsections;
+ if (dfmt_is_stabs()) {
+ /* in case the debug information is wanted, just add these three sections... */
+ add_sectname("", ".stab");
+ add_sectname("", ".stabstr");
+ add_sectname(efmt->relpfx, ".stab");
+ } else if (dfmt_is_dwarf()) {
+ /* the dwarf debug standard specifies the following ten sections,
+ not all of which are currently implemented,
+ although all of them are defined. */
+ add_sectname("", ".debug_aranges");
+ add_sectname(efmt->relpfx, ".debug_aranges");
+ add_sectname("", ".debug_pubnames");
+ add_sectname("", ".debug_info");
+ add_sectname(efmt->relpfx, ".debug_info");
+ add_sectname("", ".debug_abbrev");
+ add_sectname("", ".debug_line");
+ add_sectname(efmt->relpfx, ".debug_line");
+ add_sectname("", ".debug_frame");
+ add_sectname("", ".debug_loc");
+ }
+
+ sec_shstrtab = add_sectname("", ".shstrtab");
+ sec_symtab = add_sectname("", ".symtab");
+ sec_strtab = add_sectname("", ".strtab");
+
+ /*
+ * Build the symbol table and relocation tables.
+ */
+ symtablocal = elf_build_symtab();
+
+ /* Do we need an .symtab_shndx section? */
+ if (symtab_shndx)
+ add_sectname("", ".symtab_shndx");
+
+ for (i = 0; i < nsects; i++) {
+ if (sects[i]->head) {
+ add_sectname(efmt->relpfx, sects[i]->name);
+ sects[i]->rel = efmt->elf_build_reltab(sects[i]->head);
+ }
+ }
+
+ /*
+ * Output the ELF header.
+ */
+ nasm_zero(ehdr);
+
+ /* These fields are in the same place for 32 and 64 bits */
+ memcpy(&ehdr.com.e_ident[EI_MAG0], ELFMAG, SELFMAG);
+ ehdr.com.e_ident[EI_CLASS] = efmt->ei_class;
+ ehdr.com.e_ident[EI_DATA] = ELFDATA2LSB;
+ ehdr.com.e_ident[EI_VERSION] = EV_CURRENT;
+ ehdr.com.e_ident[EI_OSABI] = elf_osabi;
+ ehdr.com.e_ident[EI_ABIVERSION] = elf_abiver;
+ ehdr.com.e_type = cpu_to_le16(ET_REL);
+ ehdr.com.e_machine = cpu_to_le16(efmt->e_machine);
+ ehdr.com.e_version = cpu_to_le16(EV_CURRENT);
+
+ if (!efmt->elf64) {
+ ehdr.ehdr32.e_shoff = cpu_to_le32(sizeof ehdr);
+ ehdr.ehdr32.e_ehsize = cpu_to_le16(sizeof(Elf32_Ehdr));
+ ehdr.ehdr32.e_shentsize = cpu_to_le16(sizeof(Elf32_Shdr));
+ ehdr.ehdr32.e_shnum = elf_shndx(nsections, 0);
+ ehdr.ehdr32.e_shstrndx = elf_shndx(sec_shstrtab, SHN_XINDEX);
+ } else {
+ ehdr.ehdr64.e_shoff = cpu_to_le64(sizeof ehdr);
+ ehdr.ehdr64.e_ehsize = cpu_to_le16(sizeof(Elf64_Ehdr));
+ ehdr.ehdr64.e_shentsize = cpu_to_le16(sizeof(Elf64_Shdr));
+ ehdr.ehdr64.e_shnum = elf_shndx(nsections, 0);
+ ehdr.ehdr64.e_shstrndx = elf_shndx(sec_shstrtab, SHN_XINDEX);
+ }
+
+ nasm_write(&ehdr, sizeof(ehdr), ofile);
+ elf_foffs = sizeof ehdr + efmt->shdr_size * nsections;
+
+ /*
+ * Now output the section header table.
+ */
+ align = ALIGN(elf_foffs, SEC_FILEALIGN) - elf_foffs;
+ elf_foffs += align;
+ elf_nsect = 0;
+ elf_sects = nasm_malloc(sizeof(*elf_sects) * nsections);
+
+ /* SHN_UNDEF */
+ elf_section_header(0, SHT_NULL, 0, NULL, false,
+ nsections > (int)SHN_LORESERVE ? nsections : 0,
+ sec_shstrtab >= (int)SHN_LORESERVE ? sec_shstrtab : 0,
+ 0, 0, 0);
+ p = shstrtab + 1;
+
+ /* The normal sections */
+ for (i = 0; i < nsects; i++) {
+ elf_section_header(p - shstrtab, sects[i]->type, sects[i]->flags,
+ sects[i]->data, true,
+ sects[i]->len, 0, 0,
+ sects[i]->align, sects[i]->entsize);
+ p += strlen(p) + 1;
+ }
+
+ /* The debugging sections */
+ if (dfmt_is_stabs()) {
+ /* for debugging information, create the last three sections
+ which are the .stab , .stabstr and .rel.stab sections respectively */
+
+ /* this function call creates the stab sections in memory */
+ stabs_generate();
+
+ if (stabbuf && stabstrbuf && stabrelbuf) {
+ elf_section_header(p - shstrtab, SHT_PROGBITS, 0, stabbuf, false,
+ stablen, sec_stabstr, 0, 4, 12);
+ p += strlen(p) + 1;
+
+ elf_section_header(p - shstrtab, SHT_STRTAB, 0, stabstrbuf, false,
+ stabstrlen, 0, 0, 4, 0);
+ p += strlen(p) + 1;
+
+ /* link -> symtable info -> section to refer to */
+ elf_section_header(p - shstrtab, efmt->reltype, 0,
+ stabrelbuf, false, stabrellen,
+ sec_symtab, sec_stab,
+ efmt->word, efmt->relsize);
+ p += strlen(p) + 1;
+ }
+ } else if (dfmt_is_dwarf()) {
+ /* for dwarf debugging information, create the ten dwarf sections */
+
+ /* this function call creates the dwarf sections in memory */
+ if (dwarf_fsect)
+ dwarf_generate();
+
+ elf_section_header(p - shstrtab, SHT_PROGBITS, 0, arangesbuf, false,
+ arangeslen, 0, 0, 1, 0);
+ p += strlen(p) + 1;
+
+ elf_section_header(p - shstrtab, efmt->reltype, 0, arangesrelbuf, false,
+ arangesrellen, sec_symtab,
+ sec_debug_aranges,
+ efmt->word, efmt->relsize);
+ p += strlen(p) + 1;
+
+ elf_section_header(p - shstrtab, SHT_PROGBITS, 0, pubnamesbuf,
+ false, pubnameslen, 0, 0, 1, 0);
+ p += strlen(p) + 1;
+
+ elf_section_header(p - shstrtab, SHT_PROGBITS, 0, infobuf, false,
+ infolen, 0, 0, 1, 0);
+ p += strlen(p) + 1;
+
+ elf_section_header(p - shstrtab, efmt->reltype, 0, inforelbuf, false,
+ inforellen, sec_symtab,
+ sec_debug_info,
+ efmt->word, efmt->relsize);
+ p += strlen(p) + 1;
+
+ elf_section_header(p - shstrtab, SHT_PROGBITS, 0, abbrevbuf, false,
+ abbrevlen, 0, 0, 1, 0);
+ p += strlen(p) + 1;
+
+ elf_section_header(p - shstrtab, SHT_PROGBITS, 0, linebuf, false,
+ linelen, 0, 0, 1, 0);
+ p += strlen(p) + 1;
+
+ elf_section_header(p - shstrtab, efmt->reltype, 0, linerelbuf, false,
+ linerellen, sec_symtab,
+ sec_debug_line,
+ efmt->word, efmt->relsize);
+ p += strlen(p) + 1;
+
+ elf_section_header(p - shstrtab, SHT_PROGBITS, 0, framebuf, false,
+ framelen, 0, 0, 8, 0);
+ p += strlen(p) + 1;
+
+ elf_section_header(p - shstrtab, SHT_PROGBITS, 0, locbuf, false,
+ loclen, 0, 0, 1, 0);
+ p += strlen(p) + 1;
+ }
+
+ /* .shstrtab */
+ elf_section_header(p - shstrtab, SHT_STRTAB, 0, shstrtab, false,
+ shstrtablen, 0, 0, 1, 0);
+ p += strlen(p) + 1;
+
+ /* .symtab */
+ elf_section_header(p - shstrtab, SHT_SYMTAB, 0, symtab, true,
+ symtab->datalen, sec_strtab, symtablocal,
+ efmt->word, efmt->sym_size);
+ p += strlen(p) + 1;
+
+ /* .strtab */
+ elf_section_header(p - shstrtab, SHT_STRTAB, 0, strs, true,
+ strslen, 0, 0, 1, 0);
+ p += strlen(p) + 1
+;
+ /* .symtab_shndx */
+ if (symtab_shndx) {
+ elf_section_header(p - shstrtab, SHT_SYMTAB_SHNDX, 0,
+ symtab_shndx, true, symtab_shndx->datalen,
+ sec_symtab, 0, 1, 0);
+ p += strlen(p) + 1;
+ }
+
+ /* The relocation sections */
+ for (i = 0; i < nsects; i++) {
+ if (sects[i]->rel) {
+ elf_section_header(p - shstrtab, efmt->reltype, 0,
+ sects[i]->rel, true, sects[i]->rel->datalen,
+ sec_symtab, sects[i]->shndx,
+ efmt->word, efmt->relsize);
+ p += strlen(p) + 1;
+ }
+ }
+ fwritezero(align, ofile);
+
+ /*
+ * Now output the sections.
+ */
+ elf_write_sections();
+
+ nasm_free(elf_sects);
+ saa_free(symtab);
+ if (symtab_shndx)
+ saa_free(symtab_shndx);
+}
+
+static size_t nsyms;
+
+static void elf_sym(const struct elf_symbol *sym)
+{
+ int shndx = sym->section;
+
+ /*
+ * Careful here. This relies on sym->section being signed; for
+ * special section indices this value needs to be cast to
+ * (int16_t) so that it sign-extends, however, here SHN_LORESERVE
+ * is used as an unsigned constant.
+ */
+ if (shndx >= (int)SHN_LORESERVE) {
+ if (unlikely(!symtab_shndx)) {
+ /* Create symtab_shndx and fill previous entries with zero */
+ symtab_shndx = saa_init(1);
+ saa_wbytes(symtab_shndx, NULL, nsyms << 2);
+ }
+ } else {
+ shndx = 0; /* Section index table always write zero */
+ }
+
+ if (symtab_shndx)
+ saa_write32(symtab_shndx, shndx);
+
+ efmt->elf_sym(sym);
+ nsyms++;
+}
+
+static void elf32_sym(const struct elf_symbol *sym)
+{
+ Elf32_Sym sym32;
+
+ sym32.st_name = cpu_to_le32(sym->strpos);
+ sym32.st_value = cpu_to_le32(sym->symv.key);
+ sym32.st_size = cpu_to_le32(sym->size);
+ sym32.st_info = sym->type;
+ sym32.st_other = sym->other;
+ sym32.st_shndx = elf_shndx(sym->section, SHN_XINDEX);
+ saa_wbytes(symtab, &sym32, sizeof sym32);
+}
+
+static void elf64_sym(const struct elf_symbol *sym)
+{
+ Elf64_Sym sym64;
+
+ sym64.st_name = cpu_to_le32(sym->strpos);
+ sym64.st_value = cpu_to_le64(sym->symv.key);
+ sym64.st_size = cpu_to_le64(sym->size);
+ sym64.st_info = sym->type;
+ sym64.st_other = sym->other;
+ sym64.st_shndx = elf_shndx(sym->section, SHN_XINDEX);
+ saa_wbytes(symtab, &sym64, sizeof sym64);
+}
+
+static size_t elf_build_symtab(void)
+{
+ struct elf_symbol *sym, xsym;
+ size_t nlocal;
+ int i;
+
+ symtab = saa_init(1);
+ symtab_shndx = NULL;
+
+ /*
+ * Zero symbol first as required by spec.
+ */
+ nasm_zero(xsym);
+ elf_sym(&xsym);
+
+ /*
+ * Next, an entry for the file name.
+ */
+ nasm_zero(xsym);
+ xsym.strpos = 1;
+ xsym.type = ELF32_ST_INFO(STB_LOCAL, STT_FILE);
+ xsym.section = XSHN_ABS;
+ elf_sym(&xsym);
+
+ /*
+ * Now some standard symbols defining the segments, for relocation
+ * purposes.
+ */
+ nasm_zero(xsym);
+ for (i = 1; i <= nsects; i++) {
+ xsym.type = ELF64_ST_INFO(STB_LOCAL, STT_SECTION);
+ xsym.section = i;
+ elf_sym(&xsym);
+ }
+
+ /*
+ * dwarf needs symbols for debug sections
+ * which are relocation targets.
+ */
+ if (dfmt_is_dwarf()) {
+ dwarf_infosym = nsyms;
+ xsym.section = sec_debug_info;
+ elf_sym(&xsym);
+
+ dwarf_abbrevsym = nsyms;
+ xsym.section = sec_debug_abbrev;
+ elf_sym(&xsym);
+
+ dwarf_linesym = nsyms;
+ xsym.section = sec_debug_line;
+ elf_sym(&xsym);
+ }
+
+ /*
+ * Now the other local symbols.
+ */
+ saa_rewind(syms);
+ while ((sym = saa_rstruct(syms))) {
+ if (!sym_type_local(sym->type))
+ continue;
+
+ elf_sym(sym);
+ }
+
+ nlocal = nsyms;
+
+ /*
+ * Now the global symbols.
+ */
+ saa_rewind(syms);
+ while ((sym = saa_rstruct(syms))) {
+ if (sym_type_local(sym->type))
+ continue;
+
+ elf_sym(sym);
+ }
+
+ return nlocal;
+}
+
+static struct SAA *elf32_build_reltab(const struct elf_reloc *r)
+{
+ struct SAA *s;
+ int32_t global_offset;
+ Elf32_Rel rel32;
+
+ if (!r)
+ return NULL;
+
+ s = saa_init(1L);
+
+ /*
+ * How to onvert from a global placeholder to a real symbol index;
+ * the +2 refers to the two special entries, the null entry and
+ * the filename entry.
+ */
+ global_offset = -GLOBAL_TEMP_BASE + nsects + nlocals + ndebugs + 2;
+
+ while (r) {
+ int32_t sym = r->symbol;
+
+ if (sym >= GLOBAL_TEMP_BASE)
+ sym += global_offset;
+
+ rel32.r_offset = cpu_to_le32(r->address);
+ rel32.r_info = cpu_to_le32(ELF32_R_INFO(sym, r->type));
+ saa_wbytes(s, &rel32, sizeof rel32);
+
+ r = r->next;
+ }
+
+ return s;
+}
+
+static struct SAA *elfx32_build_reltab(const struct elf_reloc *r)
+{
+ struct SAA *s;
+ int32_t global_offset;
+ Elf32_Rela rela32;
+
+ if (!r)
+ return NULL;
+
+ s = saa_init(1L);
+
+ /*
+ * How to onvert from a global placeholder to a real symbol index;
+ * the +2 refers to the two special entries, the null entry and
+ * the filename entry.
+ */
+ global_offset = -GLOBAL_TEMP_BASE + nsects + nlocals + ndebugs + 2;
+
+ while (r) {
+ int32_t sym = r->symbol;
+
+ if (sym >= GLOBAL_TEMP_BASE)
+ sym += global_offset;
+
+ rela32.r_offset = cpu_to_le32(r->address);
+ rela32.r_info = cpu_to_le32(ELF32_R_INFO(sym, r->type));
+ rela32.r_addend = cpu_to_le32(r->offset);
+ saa_wbytes(s, &rela32, sizeof rela32);
+
+ r = r->next;
+ }
+
+ return s;
+}
+
+static struct SAA *elf64_build_reltab(const struct elf_reloc *r)
+{
+ struct SAA *s;
+ int32_t global_offset;
+ Elf64_Rela rela64;
+
+ if (!r)
+ return NULL;
+
+ s = saa_init(1L);
+
+ /*
+ * How to onvert from a global placeholder to a real symbol index;
+ * the +2 refers to the two special entries, the null entry and
+ * the filename entry.
+ */
+ global_offset = -GLOBAL_TEMP_BASE + nsects + nlocals + ndebugs + 2;
+
+ while (r) {
+ int32_t sym = r->symbol;
+
+ if (sym >= GLOBAL_TEMP_BASE)
+ sym += global_offset;
+
+ rela64.r_offset = cpu_to_le64(r->address);
+ rela64.r_info = cpu_to_le64(ELF64_R_INFO(sym, r->type));
+ rela64.r_addend = cpu_to_le64(r->offset);
+ saa_wbytes(s, &rela64, sizeof rela64);
+
+ r = r->next;
+ }
+
+ return s;
+}
+
+static void elf_section_header(int name, int type, uint64_t flags,
+ void *data, bool is_saa, uint64_t datalen,
+ int link, int info,
+ uint64_t align, uint64_t entsize)
+{
+ elf_sects[elf_nsect].data = data;
+ elf_sects[elf_nsect].len = datalen;
+ elf_sects[elf_nsect].is_saa = is_saa;
+ elf_nsect++;
+
+ if (!efmt->elf64) {
+ Elf32_Shdr shdr;
+
+ shdr.sh_name = cpu_to_le32(name);
+ shdr.sh_type = cpu_to_le32(type);
+ shdr.sh_flags = cpu_to_le32(flags);
+ shdr.sh_addr = 0;
+ shdr.sh_offset = cpu_to_le32(type == SHT_NULL ? 0 : elf_foffs);
+ shdr.sh_size = cpu_to_le32(datalen);
+ if (data)
+ elf_foffs += ALIGN(datalen, SEC_FILEALIGN);
+ shdr.sh_link = cpu_to_le32(link);
+ shdr.sh_info = cpu_to_le32(info);
+ shdr.sh_addralign = cpu_to_le32(align);
+ shdr.sh_entsize = cpu_to_le32(entsize);
+
+ nasm_write(&shdr, sizeof shdr, ofile);
+ } else {
+ Elf64_Shdr shdr;
+
+ shdr.sh_name = cpu_to_le32(name);
+ shdr.sh_type = cpu_to_le32(type);
+ shdr.sh_flags = cpu_to_le64(flags);
+ shdr.sh_addr = 0;
+ shdr.sh_offset = cpu_to_le64(type == SHT_NULL ? 0 : elf_foffs);
+ shdr.sh_size = cpu_to_le64(datalen);
+ if (data)
+ elf_foffs += ALIGN(datalen, SEC_FILEALIGN);
+ shdr.sh_link = cpu_to_le32(link);
+ shdr.sh_info = cpu_to_le32(info);
+ shdr.sh_addralign = cpu_to_le64(align);
+ shdr.sh_entsize = cpu_to_le64(entsize);
+
+ nasm_write(&shdr, sizeof shdr, ofile);
+ }
+}
+
+static void elf_write_sections(void)
+{
+ int i;
+ for (i = 0; i < elf_nsect; i++)
+ if (elf_sects[i].data) {
+ int32_t len = elf_sects[i].len;
+ int32_t reallen = ALIGN(len, SEC_FILEALIGN);
+ int32_t align = reallen - len;
+ if (elf_sects[i].is_saa)
+ saa_fpwrite(elf_sects[i].data, ofile);
+ else
+ nasm_write(elf_sects[i].data, len, ofile);
+ fwritezero(align, ofile);
+ }
+}
+
+static void elf_sect_write(struct elf_section *sect, const void *data, size_t len)
+{
+ saa_wbytes(sect->data, data, len);
+ sect->len += len;
+}
+
+static void elf_sect_writeaddr(struct elf_section *sect, int64_t data, size_t len)
+{
+ saa_writeaddr(sect->data, data, len);
+ sect->len += len;
+}
+
+static void elf_sectalign(int32_t seg, unsigned int value)
+{
+ struct elf_section *s;
+
+ s = raa_read_ptr(section_by_index, seg >> 1);
+ if (!s || !is_power2(value))
+ return;
+
+ if (value > s->align)
+ s->align = value;
+}
+
+extern macros_t elf_stdmac[];
+
+/* Claim "elf" as a pragma namespace, for the future */
+static const struct pragma_facility elf_pragma_list[] =
+{
+ { "elf", NULL },
+ { NULL, NULL } /* Implements the canonical output name */
+};
+
+
+static const struct dfmt elf32_df_dwarf = {
+ "ELF32 (i386) dwarf (newer)",
+ "dwarf",
+ dwarf32_init,
+ dwarf_linenum,
+ null_debug_deflabel,
+ NULL, /* .debug_smacros */
+ NULL, /* .debug_include */
+ NULL, /* .debug_mmacros */
+ null_debug_directive,
+ debug_typevalue,
+ dwarf_output,
+ dwarf_cleanup,
+ NULL /* pragma list */
+};
+
+static const struct dfmt elf32_df_stabs = {
+ "ELF32 (i386) stabs (older)",
+ "stabs",
+ null_debug_init,
+ stabs_linenum,
+ null_debug_deflabel,
+ NULL, /* .debug_smacros */
+ NULL, /* .debug_include */
+ NULL, /* .debug_mmacros */
+ null_debug_directive,
+ debug_typevalue,
+ stabs_output,
+ stabs_cleanup,
+ NULL /* pragma list */
+};
+
+static const struct dfmt * const elf32_debugs_arr[3] =
+ { &elf32_df_dwarf, &elf32_df_stabs, NULL };
+
+const struct ofmt of_elf32 = {
+ "ELF32 (i386) (Linux, most Unix variants)",
+ "elf32",
+ ".o",
+ 0,
+ 32,
+ elf32_debugs_arr,
+ &elf32_df_dwarf,
+ elf_stdmac,
+ elf32_init,
+ null_reset,
+ nasm_do_legacy_output,
+ elf32_out,
+ elf_deflabel,
+ elf_section_names,
+ NULL,
+ elf_sectalign,
+ null_segbase,
+ elf_directive,
+ elf_cleanup,
+ elf_pragma_list,
+};
+
+static const struct dfmt elf64_df_dwarf = {
+ "ELF64 (x86-64) dwarf (newer)",
+ "dwarf",
+ dwarf64_init,
+ dwarf_linenum,
+ null_debug_deflabel,
+ NULL, /* .debug_smacros */
+ NULL, /* .debug_include */
+ NULL, /* .debug_mmacros */
+ null_debug_directive,
+ debug_typevalue,
+ dwarf_output,
+ dwarf_cleanup,
+ NULL /* pragma list */
+};
+
+static const struct dfmt elf64_df_stabs = {
+ "ELF64 (x86-64) stabs (older)",
+ "stabs",
+ null_debug_init,
+ stabs_linenum,
+ null_debug_deflabel,
+ NULL, /* .debug_smacros */
+ NULL, /* .debug_include */
+ NULL, /* .debug_mmacros */
+ null_debug_directive,
+ debug_typevalue,
+ stabs_output,
+ stabs_cleanup,
+ NULL /* pragma list */
+};
+
+static const struct dfmt * const elf64_debugs_arr[3] =
+ { &elf64_df_dwarf, &elf64_df_stabs, NULL };
+
+const struct ofmt of_elf64 = {
+ "ELF64 (x86-64) (Linux, most Unix variants)",
+ "elf64",
+ ".o",
+ 0,
+ 64,
+ elf64_debugs_arr,
+ &elf64_df_dwarf,
+ elf_stdmac,
+ elf64_init,
+ null_reset,
+ nasm_do_legacy_output,
+ elf64_out,
+ elf_deflabel,
+ elf_section_names,
+ NULL,
+ elf_sectalign,
+ null_segbase,
+ elf_directive,
+ elf_cleanup,
+ elf_pragma_list,
+};
+
+static const struct dfmt elfx32_df_dwarf = {
+ "ELFx32 (x86-64) dwarf (newer)",
+ "dwarf",
+ dwarfx32_init,
+ dwarf_linenum,
+ null_debug_deflabel,
+ NULL, /* .debug_smacros */
+ NULL, /* .debug_include */
+ NULL, /* .debug_mmacros */
+ null_debug_directive,
+ debug_typevalue,
+ dwarf_output,
+ dwarf_cleanup,
+ NULL /* pragma list */
+};
+
+static const struct dfmt elfx32_df_stabs = {
+ "ELFx32 (x86-64) stabs (older)",
+ "stabs",
+ null_debug_init,
+ stabs_linenum,
+ null_debug_deflabel,
+ NULL, /* .debug_smacros */
+ NULL, /* .debug_include */
+ NULL, /* .debug_mmacros */
+ null_debug_directive,
+ debug_typevalue,
+ stabs_output,
+ stabs_cleanup,
+ elf_pragma_list,
+};
+
+static const struct dfmt * const elfx32_debugs_arr[3] =
+ { &elfx32_df_dwarf, &elfx32_df_stabs, NULL };
+
+const struct ofmt of_elfx32 = {
+ "ELFx32 (ELF32 for x86-64) (Linux)",
+ "elfx32",
+ ".o",
+ 0,
+ 64,
+ elfx32_debugs_arr,
+ &elfx32_df_dwarf,
+ elf_stdmac,
+ elfx32_init,
+ null_reset,
+ nasm_do_legacy_output,
+ elfx32_out,
+ elf_deflabel,
+ elf_section_names,
+ NULL,
+ elf_sectalign,
+ null_segbase,
+ elf_directive,
+ elf_cleanup,
+ NULL /* pragma list */
+};
+
+static bool is_elf64(void)
+{
+ return ofmt == &of_elf64;
+}
+
+static bool is_elf32(void)
+{
+ return ofmt == &of_elf32;
+}
+
+static bool is_elfx32(void)
+{
+ return ofmt == &of_elfx32;
+}
+
+static bool dfmt_is_stabs(void)
+{
+ return dfmt == &elf32_df_stabs ||
+ dfmt == &elfx32_df_stabs ||
+ dfmt == &elf64_df_stabs;
+}
+
+static bool dfmt_is_dwarf(void)
+{
+ return dfmt == &elf32_df_dwarf ||
+ dfmt == &elfx32_df_dwarf ||
+ dfmt == &elf64_df_dwarf;
+}
+
+/* common debugging routines */
+static void debug_typevalue(int32_t type)
+{
+ int32_t stype, ssize;
+ switch (TYM_TYPE(type)) {
+ case TY_LABEL:
+ ssize = 0;
+ stype = STT_NOTYPE;
+ break;
+ case TY_BYTE:
+ ssize = 1;
+ stype = STT_OBJECT;
+ break;
+ case TY_WORD:
+ ssize = 2;
+ stype = STT_OBJECT;
+ break;
+ case TY_DWORD:
+ ssize = 4;
+ stype = STT_OBJECT;
+ break;
+ case TY_FLOAT:
+ ssize = 4;
+ stype = STT_OBJECT;
+ break;
+ case TY_QWORD:
+ ssize = 8;
+ stype = STT_OBJECT;
+ break;
+ case TY_TBYTE:
+ ssize = 10;
+ stype = STT_OBJECT;
+ break;
+ case TY_OWORD:
+ ssize = 16;
+ stype = STT_OBJECT;
+ break;
+ case TY_YWORD:
+ ssize = 32;
+ stype = STT_OBJECT;
+ break;
+ case TY_ZWORD:
+ ssize = 64;
+ stype = STT_OBJECT;
+ break;
+ case TY_COMMON:
+ ssize = 0;
+ stype = STT_COMMON;
+ break;
+ case TY_SEG:
+ ssize = 0;
+ stype = STT_SECTION;
+ break;
+ case TY_EXTERN:
+ ssize = 0;
+ stype = STT_NOTYPE;
+ break;
+ case TY_EQU:
+ ssize = 0;
+ stype = STT_NOTYPE;
+ break;
+ default:
+ ssize = 0;
+ stype = STT_NOTYPE;
+ break;
+ }
+ /* Set type and size info on most recently seen symbol if we haven't set it already.
+ But avoid setting size info on object (data) symbols in absolute sections (which
+ is primarily structs); some environments get confused with non-zero-extent absolute
+ object symbols and end up showing them in backtraces for NULL fn pointer calls. */
+ if (stype == STT_OBJECT && lastsym && !lastsym->type && lastsym->section != XSHN_ABS) {
+ lastsym->size = ssize;
+ lastsym->type = stype;
+ }
+}
+
+/* stabs debugging routines */
+
+static void stabs_linenum(const char *filename, int32_t linenumber, int32_t segto)
+{
+ (void)segto;
+ if (!stabs_filename) {
+ stabs_filename = nasm_malloc(strlen(filename) + 1);
+ strcpy(stabs_filename, filename);
+ } else {
+ if (strcmp(stabs_filename, filename)) {
+ /* yep, a memory leak...this program is one-shot anyway, so who cares...
+ in fact, this leak comes in quite handy to maintain a list of files
+ encountered so far in the symbol lines... */
+
+ /* why not nasm_free(stabs_filename); we're done with the old one */
+
+ stabs_filename = nasm_malloc(strlen(filename) + 1);
+ strcpy(stabs_filename, filename);
+ }
+ }
+ debug_immcall = 1;
+ currentline = linenumber;
+}
+
+static void stabs_output(int type, void *param)
+{
+ struct symlininfo *s;
+ struct linelist *el;
+ if (type == TY_DEBUGSYMLIN) {
+ if (debug_immcall) {
+ s = (struct symlininfo *)param;
+ if (!(sects[s->section]->flags & SHF_EXECINSTR))
+ return; /* line info is only collected for executable sections */
+ numlinestabs++;
+ el = nasm_malloc(sizeof(struct linelist));
+ el->info.offset = s->offset;
+ el->info.section = s->section;
+ el->info.name = s->name;
+ el->line = currentline;
+ el->filename = stabs_filename;
+ el->next = 0;
+ if (stabslines) {
+ stabslines->last->next = el;
+ stabslines->last = el;
+ } else {
+ stabslines = el;
+ stabslines->last = el;
+ }
+ }
+ }
+ debug_immcall = 0;
+}
+
+/* for creating the .stab , .stabstr and .rel.stab sections in memory */
+
+static void stabs_generate(void)
+{
+ int i, numfiles, strsize, numstabs = 0, currfile, mainfileindex;
+ uint8_t *sbuf, *ssbuf, *rbuf, *sptr, *rptr;
+ char **allfiles;
+ int *fileidx;
+
+ struct linelist *ptr;
+
+ ptr = stabslines;
+
+ allfiles = nasm_zalloc(numlinestabs * sizeof(char *));
+ numfiles = 0;
+ while (ptr) {
+ if (numfiles == 0) {
+ allfiles[0] = ptr->filename;
+ numfiles++;
+ } else {
+ for (i = 0; i < numfiles; i++) {
+ if (!strcmp(allfiles[i], ptr->filename))
+ break;
+ }
+ if (i >= numfiles) {
+ allfiles[i] = ptr->filename;
+ numfiles++;
+ }
+ }
+ ptr = ptr->next;
+ }
+ strsize = 1;
+ fileidx = nasm_malloc(numfiles * sizeof(int));
+ for (i = 0; i < numfiles; i++) {
+ fileidx[i] = strsize;
+ strsize += strlen(allfiles[i]) + 1;
+ }
+ currfile = mainfileindex = 0;
+ for (i = 0; i < numfiles; i++) {
+ if (!strcmp(allfiles[i], elf_module)) {
+ currfile = mainfileindex = i;
+ break;
+ }
+ }
+
+ /*
+ * worst case size of the stab buffer would be:
+ * the sourcefiles changes each line, which would mean 1 SOL, 1 SYMLIN per line
+ * plus one "ending" entry
+ */
+ sbuf = nasm_malloc((numlinestabs * 2 + 4) *
+ sizeof(struct stabentry));
+ ssbuf = nasm_malloc(strsize);
+ rbuf = nasm_malloc(numlinestabs * (is_elf64() ? 16 : 8) * (2 + 3));
+ rptr = rbuf;
+
+ for (i = 0; i < numfiles; i++)
+ strcpy((char *)ssbuf + fileidx[i], allfiles[i]);
+ ssbuf[0] = 0;
+
+ stabstrlen = strsize; /* set global variable for length of stab strings */
+
+ sptr = sbuf;
+ ptr = stabslines;
+ numstabs = 0;
+
+ if (ptr) {
+ /*
+ * this is the first stab, its strx points to the filename of the
+ * source-file, the n_desc field should be set to the number
+ * of remaining stabs
+ */
+ WRITE_STAB(sptr, fileidx[0], 0, 0, 0, stabstrlen);
+
+ /* this is the stab for the main source file */
+ WRITE_STAB(sptr, fileidx[mainfileindex], N_SO, 0, 0, 0);
+
+ /* relocation table entry */
+
+ /*
+ * Since the symbol table has two entries before
+ * the section symbols, the index in the info.section
+ * member must be adjusted by adding 2
+ */
+
+ if (is_elf32()) {
+ WRITELONG(rptr, (sptr - sbuf) - 4);
+ WRITELONG(rptr, ((ptr->info.section + 2) << 8) | R_386_32);
+ } else if (is_elfx32()) {
+ WRITELONG(rptr, (sptr - sbuf) - 4);
+ WRITELONG(rptr, ((ptr->info.section + 2) << 8) | R_X86_64_32);
+ WRITELONG(rptr, 0);
+ } else {
+ nasm_assert(is_elf64());
+ WRITEDLONG(rptr, (int64_t)(sptr - sbuf) - 4);
+ WRITELONG(rptr, R_X86_64_32);
+ WRITELONG(rptr, ptr->info.section + 2);
+ WRITEDLONG(rptr, 0);
+ }
+ numstabs++;
+ }
+
+ if (is_elf32()) {
+ while (ptr) {
+ if (strcmp(allfiles[currfile], ptr->filename)) {
+ /* oops file has changed... */
+ for (i = 0; i < numfiles; i++)
+ if (!strcmp(allfiles[i], ptr->filename))
+ break;
+ currfile = i;
+ WRITE_STAB(sptr, fileidx[currfile], N_SOL, 0, 0,
+ ptr->info.offset);
+ numstabs++;
+
+ /* relocation table entry */
+ WRITELONG(rptr, (sptr - sbuf) - 4);
+ WRITELONG(rptr, ((ptr->info.section + 2) << 8) | R_386_32);
+ }
+
+ WRITE_STAB(sptr, 0, N_SLINE, 0, ptr->line, ptr->info.offset);
+ numstabs++;
+
+ /* relocation table entry */
+ WRITELONG(rptr, (sptr - sbuf) - 4);
+ WRITELONG(rptr, ((ptr->info.section + 2) << 8) | R_386_32);
+
+ ptr = ptr->next;
+ }
+ } else if (is_elfx32()) {
+ while (ptr) {
+ if (strcmp(allfiles[currfile], ptr->filename)) {
+ /* oops file has changed... */
+ for (i = 0; i < numfiles; i++)
+ if (!strcmp(allfiles[i], ptr->filename))
+ break;
+ currfile = i;
+ WRITE_STAB(sptr, fileidx[currfile], N_SOL, 0, 0,
+ ptr->info.offset);
+ numstabs++;
+
+ /* relocation table entry */
+ WRITELONG(rptr, (sptr - sbuf) - 4);
+ WRITELONG(rptr, ((ptr->info.section + 2) << 8) | R_X86_64_32);
+ WRITELONG(rptr, ptr->info.offset);
+ }
+
+ WRITE_STAB(sptr, 0, N_SLINE, 0, ptr->line, ptr->info.offset);
+ numstabs++;
+
+ /* relocation table entry */
+ WRITELONG(rptr, (sptr - sbuf) - 4);
+ WRITELONG(rptr, ((ptr->info.section + 2) << 8) | R_X86_64_32);
+ WRITELONG(rptr, ptr->info.offset);
+
+ ptr = ptr->next;
+ }
+ } else {
+ nasm_assert(is_elf64());
+ while (ptr) {
+ if (strcmp(allfiles[currfile], ptr->filename)) {
+ /* oops file has changed... */
+ for (i = 0; i < numfiles; i++)
+ if (!strcmp(allfiles[i], ptr->filename))
+ break;
+ currfile = i;
+ WRITE_STAB(sptr, fileidx[currfile], N_SOL, 0, 0,
+ ptr->info.offset);
+ numstabs++;
+
+ /* relocation table entry */
+ WRITEDLONG(rptr, (int64_t)(sptr - sbuf) - 4);
+ WRITELONG(rptr, R_X86_64_32);
+ WRITELONG(rptr, ptr->info.section + 2);
+ WRITEDLONG(rptr, ptr->info.offset);
+ }
+
+ WRITE_STAB(sptr, 0, N_SLINE, 0, ptr->line, ptr->info.offset);
+ numstabs++;
+
+ /* relocation table entry */
+ WRITEDLONG(rptr, (int64_t)(sptr - sbuf) - 4);
+ WRITELONG(rptr, R_X86_64_32);
+ WRITELONG(rptr, ptr->info.section + 2);
+ WRITEDLONG(rptr, ptr->info.offset);
+
+ ptr = ptr->next;
+ }
+ }
+
+ /* this is an "ending" token */
+ WRITE_STAB(sptr, 0, N_SO, 0, 0, 0);
+ numstabs++;
+
+ ((struct stabentry *)sbuf)->n_desc = numstabs;
+
+ nasm_free(allfiles);
+ nasm_free(fileidx);
+
+ stablen = (sptr - sbuf);
+ stabrellen = (rptr - rbuf);
+ stabrelbuf = rbuf;
+ stabbuf = sbuf;
+ stabstrbuf = ssbuf;
+}
+
+static void stabs_cleanup(void)
+{
+ struct linelist *ptr, *del;
+ if (!stabslines)
+ return;
+
+ ptr = stabslines;
+ while (ptr) {
+ del = ptr;
+ ptr = ptr->next;
+ nasm_free(del);
+ }
+
+ nasm_free(stabbuf);
+ nasm_free(stabrelbuf);
+ nasm_free(stabstrbuf);
+}
+
+/* dwarf routines */
+
+static void dwarf_init_common(const struct dwarf_format *fmt)
+{
+ dwfmt = fmt;
+ ndebugs = 3; /* 3 debug symbols */
+}
+
+static void dwarf32_init(void)
+{
+ static const struct dwarf_format dwfmt32 = {
+ 2, /* DWARF 2 */
+ /* section version numbers: */
+ { 2, /* .debug_aranges */
+ 0, /* .rela.debug_aranges */
+ 2, /* .debug_pubnames */
+ 2, /* .debug_info */
+ 0, /* .rela.debug_info */
+ 0, /* .debug_abbrev */
+ 2, /* .debug_line */
+ 0, /* .rela.debug_line */
+ 1, /* .debug_frame */
+ 0 } /* .debug_loc */
+ };
+ dwarf_init_common(&dwfmt32);
+}
+
+static void dwarfx32_init(void)
+{
+ static const struct dwarf_format dwfmtx32 = {
+ 3, /* DWARF 3 */
+ /* section version numbers: */
+ { 2, /* .debug_aranges */
+ 0, /* .rela.debug_aranges */
+ 2, /* .debug_pubnames */
+ 3, /* .debug_info */
+ 0, /* .rela.debug_info */
+ 0, /* .debug_abbrev */
+ 3, /* .debug_line */
+ 0, /* .rela.debug_line */
+ 3, /* .debug_frame */
+ 0 } /* .debug_loc */
+ };
+ dwarf_init_common(&dwfmtx32);
+}
+
+static void dwarf64_init(void)
+{
+ static const struct dwarf_format dwfmt64 = {
+ 3, /* DWARF 3 */
+ /* section version numbers: */
+ { 2, /* .debug_aranges */
+ 0, /* .rela.debug_aranges */
+ 2, /* .debug_pubnames */
+ 3, /* .debug_info */
+ 0, /* .rela.debug_info */
+ 0, /* .debug_abbrev */
+ 3, /* .debug_line */
+ 0, /* .rela.debug_line */
+ 3, /* .debug_frame */
+ 0 } /* .debug_loc */
+ };
+ dwarf_init_common(&dwfmt64);
+}
+
+static void dwarf_linenum(const char *filename, int32_t linenumber,
+ int32_t segto)
+{
+ (void)segto;
+ dwarf_findfile(filename);
+ debug_immcall = 1;
+ currentline = linenumber;
+}
+
+/* called from elf_out with type == TY_DEBUGSYMLIN */
+static void dwarf_output(int type, void *param)
+{
+ int ln, aa, inx, maxln, soc;
+ struct symlininfo *s;
+ struct SAA *plinep;
+
+ (void)type;
+
+ s = (struct symlininfo *)param;
+
+ /* line number info is only gathered for executable sections */
+ if (!(sects[s->section]->flags & SHF_EXECINSTR))
+ return;
+
+ /* Check if section index has changed */
+ if (!(dwarf_csect && (dwarf_csect->section) == (s->section)))
+ dwarf_findsect(s->section);
+
+ /* do nothing unless line or file has changed */
+ if (!debug_immcall)
+ return;
+
+ ln = currentline - dwarf_csect->line;
+ aa = s->offset - dwarf_csect->offset;
+ inx = dwarf_clist->line;
+ plinep = dwarf_csect->psaa;
+ /* check for file change */
+ if (!(inx == dwarf_csect->file)) {
+ saa_write8(plinep,DW_LNS_set_file);
+ saa_write8(plinep,inx);
+ dwarf_csect->file = inx;
+ }
+ /* check for line change */
+ if (ln) {
+ /* test if in range of special op code */
+ maxln = line_base + line_range;
+ soc = (ln - line_base) + (line_range * aa) + opcode_base;
+ if (ln >= line_base && ln < maxln && soc < 256) {
+ saa_write8(plinep,soc);
+ } else {
+ saa_write8(plinep,DW_LNS_advance_line);
+ saa_wleb128s(plinep,ln);
+ if (aa) {
+ saa_write8(plinep,DW_LNS_advance_pc);
+ saa_wleb128u(plinep,aa);
+ }
+ saa_write8(plinep,DW_LNS_copy);
+ }
+ dwarf_csect->line = currentline;
+ dwarf_csect->offset = s->offset;
+ }
+
+ /* show change handled */
+ debug_immcall = 0;
+}
+
+
+static void dwarf_generate(void)
+{
+ uint8_t *pbuf;
+ int indx;
+ struct linelist *ftentry;
+ struct SAA *paranges, *ppubnames, *pinfo, *pabbrev, *plines, *plinep;
+ struct SAA *parangesrel, *plinesrel, *pinforel;
+ struct sectlist *psect;
+ size_t saalen, linepoff, totlen, highaddr;
+
+ if (is_elf32()) {
+ /* write epilogues for each line program range */
+ /* and build aranges section */
+ paranges = saa_init(1L);
+ parangesrel = saa_init(1L);
+ saa_write16(paranges, dwfmt->sect_version[DWARF_ARANGES]);
+ saa_write32(parangesrel, paranges->datalen+4);
+ saa_write32(parangesrel, (dwarf_infosym << 8) + R_386_32); /* reloc to info */
+ saa_write32(paranges,0); /* offset into info */
+ saa_write8(paranges,4); /* pointer size */
+ saa_write8(paranges,0); /* not segmented */
+ saa_write32(paranges,0); /* padding */
+ /* iterate though sectlist entries */
+ psect = dwarf_fsect;
+ totlen = 0;
+ highaddr = 0;
+ for (indx = 0; indx < dwarf_nsections; indx++) {
+ plinep = psect->psaa;
+ /* Line Number Program Epilogue */
+ saa_write8(plinep,2); /* std op 2 */
+ saa_write8(plinep,(sects[psect->section]->len)-psect->offset);
+ saa_write8(plinep,DW_LNS_extended_op);
+ saa_write8(plinep,1); /* operand length */
+ saa_write8(plinep,DW_LNE_end_sequence);
+ totlen += plinep->datalen;
+ /* range table relocation entry */
+ saa_write32(parangesrel, paranges->datalen + 4);
+ saa_write32(parangesrel, ((uint32_t) (psect->section + 2) << 8) + R_386_32);
+ /* range table entry */
+ saa_write32(paranges,0x0000); /* range start */
+ saa_write32(paranges,sects[psect->section]->len); /* range length */
+ highaddr += sects[psect->section]->len;
+ /* done with this entry */
+ psect = psect->next;
+ }
+ saa_write32(paranges,0); /* null address */
+ saa_write32(paranges,0); /* null length */
+ saalen = paranges->datalen;
+ arangeslen = saalen + 4;
+ arangesbuf = pbuf = nasm_malloc(arangeslen);
+ WRITELONG(pbuf,saalen); /* initial length */
+ saa_rnbytes(paranges, pbuf, saalen);
+ saa_free(paranges);
+ } else if (is_elfx32()) {
+ /* write epilogues for each line program range */
+ /* and build aranges section */
+ paranges = saa_init(1L);
+ parangesrel = saa_init(1L);
+ saa_write16(paranges, dwfmt->sect_version[DWARF_ARANGES]);
+ saa_write32(parangesrel, paranges->datalen+4);
+ saa_write32(parangesrel, (dwarf_infosym << 8) + R_X86_64_32); /* reloc to info */
+ saa_write32(parangesrel, 0);
+ saa_write32(paranges,0); /* offset into info */
+ saa_write8(paranges,4); /* pointer size */
+ saa_write8(paranges,0); /* not segmented */
+ saa_write32(paranges,0); /* padding */
+ /* iterate though sectlist entries */
+ psect = dwarf_fsect;
+ totlen = 0;
+ highaddr = 0;
+ for (indx = 0; indx < dwarf_nsections; indx++) {
+ plinep = psect->psaa;
+ /* Line Number Program Epilogue */
+ saa_write8(plinep,2); /* std op 2 */
+ saa_write8(plinep,(sects[psect->section]->len)-psect->offset);
+ saa_write8(plinep,DW_LNS_extended_op);
+ saa_write8(plinep,1); /* operand length */
+ saa_write8(plinep,DW_LNE_end_sequence);
+ totlen += plinep->datalen;
+ /* range table relocation entry */
+ saa_write32(parangesrel, paranges->datalen + 4);
+ saa_write32(parangesrel, ((uint32_t) (psect->section + 2) << 8) + R_X86_64_32);
+ saa_write32(parangesrel, (uint32_t) 0);
+ /* range table entry */
+ saa_write32(paranges,0x0000); /* range start */
+ saa_write32(paranges,sects[psect->section]->len); /* range length */
+ highaddr += sects[psect->section]->len;
+ /* done with this entry */
+ psect = psect->next;
+ }
+ saa_write32(paranges,0); /* null address */
+ saa_write32(paranges,0); /* null length */
+ saalen = paranges->datalen;
+ arangeslen = saalen + 4;
+ arangesbuf = pbuf = nasm_malloc(arangeslen);
+ WRITELONG(pbuf,saalen); /* initial length */
+ saa_rnbytes(paranges, pbuf, saalen);
+ saa_free(paranges);
+ } else {
+ nasm_assert(is_elf64());
+ /* write epilogues for each line program range */
+ /* and build aranges section */
+ paranges = saa_init(1L);
+ parangesrel = saa_init(1L);
+ saa_write16(paranges, dwfmt->sect_version[DWARF_ARANGES]);
+ saa_write64(parangesrel, paranges->datalen+4);
+ saa_write64(parangesrel, (dwarf_infosym << 32) + R_X86_64_32); /* reloc to info */
+ saa_write64(parangesrel, 0);
+ saa_write32(paranges,0); /* offset into info */
+ saa_write8(paranges,8); /* pointer size */
+ saa_write8(paranges,0); /* not segmented */
+ saa_write32(paranges,0); /* padding */
+ /* iterate though sectlist entries */
+ psect = dwarf_fsect;
+ totlen = 0;
+ highaddr = 0;
+ for (indx = 0; indx < dwarf_nsections; indx++) {
+ plinep = psect->psaa;
+ /* Line Number Program Epilogue */
+ saa_write8(plinep,2); /* std op 2 */
+ saa_write8(plinep,(sects[psect->section]->len)-psect->offset);
+ saa_write8(plinep,DW_LNS_extended_op);
+ saa_write8(plinep,1); /* operand length */
+ saa_write8(plinep,DW_LNE_end_sequence);
+ totlen += plinep->datalen;
+ /* range table relocation entry */
+ saa_write64(parangesrel, paranges->datalen + 4);
+ saa_write64(parangesrel, ((uint64_t) (psect->section + 2) << 32) + R_X86_64_64);
+ saa_write64(parangesrel, (uint64_t) 0);
+ /* range table entry */
+ saa_write64(paranges,0x0000); /* range start */
+ saa_write64(paranges,sects[psect->section]->len); /* range length */
+ highaddr += sects[psect->section]->len;
+ /* done with this entry */
+ psect = psect->next;
+ }
+ saa_write64(paranges,0); /* null address */
+ saa_write64(paranges,0); /* null length */
+ saalen = paranges->datalen;
+ arangeslen = saalen + 4;
+ arangesbuf = pbuf = nasm_malloc(arangeslen);
+ WRITELONG(pbuf,saalen); /* initial length */
+ saa_rnbytes(paranges, pbuf, saalen);
+ saa_free(paranges);
+ }
+
+ /* build rela.aranges section */
+ arangesrellen = saalen = parangesrel->datalen;
+ arangesrelbuf = pbuf = nasm_malloc(arangesrellen);
+ saa_rnbytes(parangesrel, pbuf, saalen);
+ saa_free(parangesrel);
+
+ /* build pubnames section */
+ if (0) {
+ ppubnames = saa_init(1L);
+ saa_write16(ppubnames,dwfmt->sect_version[DWARF_PUBNAMES]);
+ saa_write32(ppubnames,0); /* offset into info */
+ saa_write32(ppubnames,0); /* space used in info */
+ saa_write32(ppubnames,0); /* end of list */
+ saalen = ppubnames->datalen;
+ pubnameslen = saalen + 4;
+ pubnamesbuf = pbuf = nasm_malloc(pubnameslen);
+ WRITELONG(pbuf,saalen); /* initial length */
+ saa_rnbytes(ppubnames, pbuf, saalen);
+ saa_free(ppubnames);
+ } else {
+ /* Don't write a section without actual information */
+ pubnameslen = 0;
+ }
+
+ if (is_elf32()) {
+ /* build info section */
+ pinfo = saa_init(1L);
+ pinforel = saa_init(1L);
+ saa_write16(pinfo, dwfmt->sect_version[DWARF_INFO]);
+ saa_write32(pinforel, pinfo->datalen + 4);
+ saa_write32(pinforel, (dwarf_abbrevsym << 8) + R_386_32); /* reloc to abbrev */
+ saa_write32(pinfo,0); /* offset into abbrev */
+ saa_write8(pinfo,4); /* pointer size */
+ saa_write8(pinfo,1); /* abbrviation number LEB128u */
+ saa_write32(pinforel, pinfo->datalen + 4);
+ saa_write32(pinforel, ((dwarf_fsect->section + 2) << 8) + R_386_32);
+ saa_write32(pinfo,0); /* DW_AT_low_pc */
+ saa_write32(pinforel, pinfo->datalen + 4);
+ saa_write32(pinforel, ((dwarf_fsect->section + 2) << 8) + R_386_32);
+ saa_write32(pinfo,highaddr); /* DW_AT_high_pc */
+ saa_write32(pinforel, pinfo->datalen + 4);
+ saa_write32(pinforel, (dwarf_linesym << 8) + R_386_32); /* reloc to line */
+ saa_write32(pinfo,0); /* DW_AT_stmt_list */
+ saa_wbytes(pinfo, elf_module, strlen(elf_module)+1); /* DW_AT_name */
+ saa_wbytes(pinfo, elf_dir, strlen(elf_dir)+1); /* DW_AT_comp_dir */
+ saa_wbytes(pinfo, nasm_signature(), nasm_signature_len()+1);
+ saa_write16(pinfo,DW_LANG_Mips_Assembler);
+ saa_write8(pinfo,2); /* abbrviation number LEB128u */
+ saa_write32(pinforel, pinfo->datalen + 4);
+ saa_write32(pinforel, ((dwarf_fsect->section + 2) << 8) + R_386_32);
+ saa_write32(pinfo,0); /* DW_AT_low_pc */
+ saa_write32(pinfo,0); /* DW_AT_frame_base */
+ saa_write8(pinfo,0); /* end of entries */
+ saalen = pinfo->datalen;
+ infolen = saalen + 4;
+ infobuf = pbuf = nasm_malloc(infolen);
+ WRITELONG(pbuf,saalen); /* initial length */
+ saa_rnbytes(pinfo, pbuf, saalen);
+ saa_free(pinfo);
+ } else if (is_elfx32()) {
+ /* build info section */
+ pinfo = saa_init(1L);
+ pinforel = saa_init(1L);
+ saa_write16(pinfo, dwfmt->sect_version[DWARF_INFO]);
+ saa_write32(pinforel, pinfo->datalen + 4);
+ saa_write32(pinforel, (dwarf_abbrevsym << 8) + R_X86_64_32); /* reloc to abbrev */
+ saa_write32(pinforel, 0);
+ saa_write32(pinfo,0); /* offset into abbrev */
+ saa_write8(pinfo,4); /* pointer size */
+ saa_write8(pinfo,1); /* abbrviation number LEB128u */
+ saa_write32(pinforel, pinfo->datalen + 4);
+ saa_write32(pinforel, ((dwarf_fsect->section + 2) << 8) + R_X86_64_32);
+ saa_write32(pinforel, 0);
+ saa_write32(pinfo,0); /* DW_AT_low_pc */
+ saa_write32(pinforel, pinfo->datalen + 4);
+ saa_write32(pinforel, ((dwarf_fsect->section + 2) << 8) + R_X86_64_32);
+ saa_write32(pinforel, highaddr);
+ saa_write32(pinfo,0); /* DW_AT_high_pc */
+ saa_write32(pinforel, pinfo->datalen + 4);
+ saa_write32(pinforel, (dwarf_linesym << 8) + R_X86_64_32); /* reloc to line */
+ saa_write32(pinforel, 0);
+ saa_write32(pinfo,0); /* DW_AT_stmt_list */
+ saa_wbytes(pinfo, elf_module, strlen(elf_module)+1); /* DW_AT_name */
+ saa_wbytes(pinfo, elf_dir, strlen(elf_dir)+1); /* DW_AT_comp_dir */
+ saa_wbytes(pinfo, nasm_signature(), nasm_signature_len()+1);
+ saa_write16(pinfo,DW_LANG_Mips_Assembler);
+ saa_write8(pinfo,2); /* abbrviation number LEB128u */
+ saa_write32(pinforel, pinfo->datalen + 4);
+ saa_write32(pinforel, ((dwarf_fsect->section + 2) << 8) + R_X86_64_32);
+ saa_write32(pinforel, 0);
+ saa_write32(pinfo,0); /* DW_AT_low_pc */
+ saa_write32(pinfo,0); /* DW_AT_frame_base */
+ saa_write8(pinfo,0); /* end of entries */
+ saalen = pinfo->datalen;
+ infolen = saalen + 4;
+ infobuf = pbuf = nasm_malloc(infolen);
+ WRITELONG(pbuf,saalen); /* initial length */
+ saa_rnbytes(pinfo, pbuf, saalen);
+ saa_free(pinfo);
+ } else {
+ nasm_assert(is_elf64());
+ /* build info section */
+ pinfo = saa_init(1L);
+ pinforel = saa_init(1L);
+ saa_write16(pinfo, dwfmt->sect_version[DWARF_INFO]);
+ saa_write64(pinforel, pinfo->datalen + 4);
+ saa_write64(pinforel, (dwarf_abbrevsym << 32) + R_X86_64_32); /* reloc to abbrev */
+ saa_write64(pinforel, 0);
+ saa_write32(pinfo,0); /* offset into abbrev */
+ saa_write8(pinfo,8); /* pointer size */
+ saa_write8(pinfo,1); /* abbrviation number LEB128u */
+ saa_write64(pinforel, pinfo->datalen + 4);
+ saa_write64(pinforel, ((uint64_t)(dwarf_fsect->section + 2) << 32) + R_X86_64_64);
+ saa_write64(pinforel, 0);
+ saa_write64(pinfo,0); /* DW_AT_low_pc */
+ saa_write64(pinforel, pinfo->datalen + 4);
+ saa_write64(pinforel, ((uint64_t)(dwarf_fsect->section + 2) << 32) + R_X86_64_64);
+ saa_write64(pinforel, highaddr);
+ saa_write64(pinfo,0); /* DW_AT_high_pc */
+ saa_write64(pinforel, pinfo->datalen + 4);
+ saa_write64(pinforel, (dwarf_linesym << 32) + R_X86_64_32); /* reloc to line */
+ saa_write64(pinforel, 0);
+ saa_write32(pinfo,0); /* DW_AT_stmt_list */
+ saa_wbytes(pinfo, elf_module, strlen(elf_module)+1); /* DW_AT_name */
+ saa_wbytes(pinfo, elf_dir, strlen(elf_dir)+1); /* DW_AT_comp_dir */
+ saa_wbytes(pinfo, nasm_signature(), nasm_signature_len()+1);
+ saa_write16(pinfo,DW_LANG_Mips_Assembler);
+ saa_write8(pinfo,2); /* abbrviation number LEB128u */
+ saa_write64(pinforel, pinfo->datalen + 4);
+ saa_write64(pinforel, ((uint64_t)(dwarf_fsect->section + 2) << 32) + R_X86_64_64);
+ saa_write64(pinforel, 0);
+ saa_write64(pinfo,0); /* DW_AT_low_pc */
+ saa_write64(pinfo,0); /* DW_AT_frame_base */
+ saa_write8(pinfo,0); /* end of entries */
+ saalen = pinfo->datalen;
+ infolen = saalen + 4;
+ infobuf = pbuf = nasm_malloc(infolen);
+ WRITELONG(pbuf,saalen); /* initial length */
+ saa_rnbytes(pinfo, pbuf, saalen);
+ saa_free(pinfo);
+ }
+
+ /* build rela.info section */
+ inforellen = saalen = pinforel->datalen;
+ inforelbuf = pbuf = nasm_malloc(inforellen);
+ saa_rnbytes(pinforel, pbuf, saalen);
+ saa_free(pinforel);
+
+ /* build abbrev section */
+ pabbrev = saa_init(1L);
+ saa_write8(pabbrev,1); /* entry number LEB128u */
+ saa_write8(pabbrev,DW_TAG_compile_unit); /* tag LEB128u */
+ saa_write8(pabbrev,1); /* has children */
+ /* the following attributes and forms are all LEB128u values */
+ saa_write8(pabbrev,DW_AT_low_pc);
+ saa_write8(pabbrev,DW_FORM_addr);
+ saa_write8(pabbrev,DW_AT_high_pc);
+ saa_write8(pabbrev,DW_FORM_addr);
+ saa_write8(pabbrev,DW_AT_stmt_list);
+ saa_write8(pabbrev,DW_FORM_data4);
+ saa_write8(pabbrev,DW_AT_name);
+ saa_write8(pabbrev,DW_FORM_string);
+ saa_write8(pabbrev,DW_AT_comp_dir);
+ saa_write8(pabbrev,DW_FORM_string);
+ saa_write8(pabbrev,DW_AT_producer);
+ saa_write8(pabbrev,DW_FORM_string);
+ saa_write8(pabbrev,DW_AT_language);
+ saa_write8(pabbrev,DW_FORM_data2);
+ saa_write16(pabbrev,0); /* end of entry */
+ /* LEB128u usage same as above */
+ saa_write8(pabbrev,2); /* entry number */
+ saa_write8(pabbrev,DW_TAG_subprogram);
+ saa_write8(pabbrev,0); /* no children */
+ saa_write8(pabbrev,DW_AT_low_pc);
+ saa_write8(pabbrev,DW_FORM_addr);
+ saa_write8(pabbrev,DW_AT_frame_base);
+ saa_write8(pabbrev,DW_FORM_data4);
+ saa_write16(pabbrev,0); /* end of entry */
+ /* Terminal zero entry */
+ saa_write8(pabbrev,0);
+ abbrevlen = saalen = pabbrev->datalen;
+ abbrevbuf = pbuf = nasm_malloc(saalen);
+ saa_rnbytes(pabbrev, pbuf, saalen);
+ saa_free(pabbrev);
+
+ /* build line section */
+ /* prolog */
+ plines = saa_init(1L);
+ saa_write8(plines,1); /* Minimum Instruction Length */
+ saa_write8(plines,1); /* Initial value of 'is_stmt' */
+ saa_write8(plines,line_base); /* Line Base */
+ saa_write8(plines,line_range); /* Line Range */
+ saa_write8(plines,opcode_base); /* Opcode Base */
+ /* standard opcode lengths (# of LEB128u operands) */
+ saa_write8(plines,0); /* Std opcode 1 length */
+ saa_write8(plines,1); /* Std opcode 2 length */
+ saa_write8(plines,1); /* Std opcode 3 length */
+ saa_write8(plines,1); /* Std opcode 4 length */
+ saa_write8(plines,1); /* Std opcode 5 length */
+ saa_write8(plines,0); /* Std opcode 6 length */
+ saa_write8(plines,0); /* Std opcode 7 length */
+ saa_write8(plines,0); /* Std opcode 8 length */
+ saa_write8(plines,1); /* Std opcode 9 length */
+ saa_write8(plines,0); /* Std opcode 10 length */
+ saa_write8(plines,0); /* Std opcode 11 length */
+ saa_write8(plines,1); /* Std opcode 12 length */
+ /* Directory Table */
+ saa_write8(plines,0); /* End of table */
+ /* File Name Table */
+ ftentry = dwarf_flist;
+ for (indx = 0; indx < dwarf_numfiles; indx++) {
+ saa_wbytes(plines, ftentry->filename, (int32_t)(strlen(ftentry->filename) + 1));
+ saa_write8(plines,0); /* directory LEB128u */
+ saa_write8(plines,0); /* time LEB128u */
+ saa_write8(plines,0); /* size LEB128u */
+ ftentry = ftentry->next;
+ }
+ saa_write8(plines,0); /* End of table */
+ linepoff = plines->datalen;
+ linelen = linepoff + totlen + 10;
+ linebuf = pbuf = nasm_malloc(linelen);
+ WRITELONG(pbuf,linelen-4); /* initial length */
+ WRITESHORT(pbuf,dwfmt->sect_version[DWARF_LINE]);
+ WRITELONG(pbuf,linepoff); /* offset to line number program */
+ /* write line header */
+ saalen = linepoff;
+ saa_rnbytes(plines, pbuf, saalen); /* read a given no. of bytes */
+ pbuf += linepoff;
+ saa_free(plines);
+ /* concatenate line program ranges */
+ linepoff += 13;
+ plinesrel = saa_init(1L);
+ psect = dwarf_fsect;
+ if (is_elf32()) {
+ for (indx = 0; indx < dwarf_nsections; indx++) {
+ saa_write32(plinesrel, linepoff);
+ saa_write32(plinesrel, ((uint32_t) (psect->section + 2) << 8) + R_386_32);
+ plinep = psect->psaa;
+ saalen = plinep->datalen;
+ saa_rnbytes(plinep, pbuf, saalen);
+ pbuf += saalen;
+ linepoff += saalen;
+ saa_free(plinep);
+ /* done with this entry */
+ psect = psect->next;
+ }
+ } else if (is_elfx32()) {
+ for (indx = 0; indx < dwarf_nsections; indx++) {
+ saa_write32(plinesrel, linepoff);
+ saa_write32(plinesrel, ((psect->section + 2) << 8) + R_X86_64_32);
+ saa_write32(plinesrel, 0);
+ plinep = psect->psaa;
+ saalen = plinep->datalen;
+ saa_rnbytes(plinep, pbuf, saalen);
+ pbuf += saalen;
+ linepoff += saalen;
+ saa_free(plinep);
+ /* done with this entry */
+ psect = psect->next;
+ }
+ } else {
+ nasm_assert(is_elf64());
+ for (indx = 0; indx < dwarf_nsections; indx++) {
+ saa_write64(plinesrel, linepoff);
+ saa_write64(plinesrel, ((uint64_t) (psect->section + 2) << 32) + R_X86_64_64);
+ saa_write64(plinesrel, (uint64_t) 0);
+ plinep = psect->psaa;
+ saalen = plinep->datalen;
+ saa_rnbytes(plinep, pbuf, saalen);
+ pbuf += saalen;
+ linepoff += saalen;
+ saa_free(plinep);
+ /* done with this entry */
+ psect = psect->next;
+ }
+ }
+
+ /* build rela.lines section */
+ linerellen =saalen = plinesrel->datalen;
+ linerelbuf = pbuf = nasm_malloc(linerellen);
+ saa_rnbytes(plinesrel, pbuf, saalen);
+ saa_free(plinesrel);
+
+ /* build .debug_frame section */
+ if (0) {
+ framelen = 4;
+ framebuf = pbuf = nasm_malloc(framelen);
+ WRITELONG(pbuf,framelen-4); /* initial length */
+ } else {
+ /* Leave .debug_frame empty if not used! */
+ framelen = 0;
+ }
+
+ /* build .debug_loc section */
+ if (0) {
+ loclen = 16;
+ locbuf = pbuf = nasm_malloc(loclen);
+ if (is_elf32() || is_elfx32()) {
+ WRITELONG(pbuf,0); /* null beginning offset */
+ WRITELONG(pbuf,0); /* null ending offset */
+ } else {
+ nasm_assert(is_elf64());
+ WRITEDLONG(pbuf,0); /* null beginning offset */
+ WRITEDLONG(pbuf,0); /* null ending offset */
+ }
+ } else {
+ /* Leave .debug_frame empty if not used! */
+ loclen = 0;
+ }
+}
+
+static void dwarf_cleanup(void)
+{
+ nasm_free(arangesbuf);
+ nasm_free(arangesrelbuf);
+ nasm_free(pubnamesbuf);
+ nasm_free(infobuf);
+ nasm_free(inforelbuf);
+ nasm_free(abbrevbuf);
+ nasm_free(linebuf);
+ nasm_free(linerelbuf);
+ nasm_free(framebuf);
+ nasm_free(locbuf);
+}
+
+static void dwarf_findfile(const char * fname)
+{
+ int finx;
+ struct linelist *match;
+
+ /* return if fname is current file name */
+ if (dwarf_clist && !(strcmp(fname, dwarf_clist->filename)))
+ return;
+
+ /* search for match */
+ match = 0;
+ if (dwarf_flist) {
+ match = dwarf_flist;
+ for (finx = 0; finx < dwarf_numfiles; finx++) {
+ if (!(strcmp(fname, match->filename))) {
+ dwarf_clist = match;
+ return;
+ }
+ match = match->next;
+ }
+ }
+
+ /* add file name to end of list */
+ dwarf_clist = nasm_malloc(sizeof(struct linelist));
+ dwarf_numfiles++;
+ dwarf_clist->line = dwarf_numfiles;
+ dwarf_clist->filename = nasm_malloc(strlen(fname) + 1);
+ strcpy(dwarf_clist->filename,fname);
+ dwarf_clist->next = 0;
+ if (!dwarf_flist) { /* if first entry */
+ dwarf_flist = dwarf_elist = dwarf_clist;
+ dwarf_clist->last = 0;
+ } else { /* chain to previous entry */
+ dwarf_elist->next = dwarf_clist;
+ dwarf_elist = dwarf_clist;
+ }
+}
+
+static void dwarf_findsect(const int index)
+{
+ int sinx;
+ struct sectlist *match;
+ struct SAA *plinep;
+
+ /* return if index is current section index */
+ if (dwarf_csect && (dwarf_csect->section == index))
+ return;
+
+ /* search for match */
+ match = 0;
+ if (dwarf_fsect) {
+ match = dwarf_fsect;
+ for (sinx = 0; sinx < dwarf_nsections; sinx++) {
+ if (match->section == index) {
+ dwarf_csect = match;
+ return;
+ }
+ match = match->next;
+ }
+ }
+
+ /* add entry to end of list */
+ dwarf_csect = nasm_malloc(sizeof(struct sectlist));
+ dwarf_nsections++;
+ dwarf_csect->psaa = plinep = saa_init(1L);
+ dwarf_csect->line = 1;
+ dwarf_csect->offset = 0;
+ dwarf_csect->file = 1;
+ dwarf_csect->section = index;
+ dwarf_csect->next = 0;
+ /* set relocatable address at start of line program */
+ saa_write8(plinep,DW_LNS_extended_op);
+ saa_write8(plinep,is_elf64() ? 9 : 5); /* operand length */
+ saa_write8(plinep,DW_LNE_set_address);
+ if (is_elf64())
+ saa_write64(plinep,0); /* Start Address */
+ else
+ saa_write32(plinep,0); /* Start Address */
+
+ if (!dwarf_fsect) { /* if first entry */
+ dwarf_fsect = dwarf_esect = dwarf_csect;
+ dwarf_csect->last = 0;
+ } else { /* chain to previous entry */
+ dwarf_esect->next = dwarf_csect;
+ dwarf_esect = dwarf_csect;
+ }
+}
+
+#endif /* defined(OF_ELF32) || defined(OF_ELF64) || defined(OF_ELFX32) */
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-16 17:50:32 +0000