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-rw-r--r--vere/ext/nasm/output/outbin.c1669
1 files changed, 1669 insertions, 0 deletions
diff --git a/vere/ext/nasm/output/outbin.c b/vere/ext/nasm/output/outbin.c
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+++ b/vere/ext/nasm/output/outbin.c
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+/* ----------------------------------------------------------------------- *
+ *
+ * Copyright 1996-2017 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.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * outbin.c output routines for the Netwide Assembler to produce
+ * flat-form binary files
+ */
+
+/* This is the extended version of NASM's original binary output
+ * format. It is backward compatible with the original BIN format,
+ * and contains support for multiple sections and advanced section
+ * ordering.
+ *
+ * Feature summary:
+ *
+ * - Users can create an arbitrary number of sections; they are not
+ * limited to just ".text", ".data", and ".bss".
+ *
+ * - Sections can be either progbits or nobits type.
+ *
+ * - You can specify that they be aligned at a certain boundary
+ * following the previous section ("align="), or positioned at an
+ * arbitrary byte-granular location ("start=").
+ *
+ * - You can specify a "virtual" start address for a section, which
+ * will be used for the calculation for all address references
+ * with respect to that section ("vstart=").
+ *
+ * - The ORG directive, as well as the section/segment directive
+ * arguments ("align=", "start=", "vstart="), can take a critical
+ * expression as their value. For example: "align=(1 << 12)".
+ *
+ * - You can generate map files using the 'map' directive.
+ *
+ */
+
+/* Uncomment the following define if you want sections to adapt
+ * their progbits/nobits state depending on what type of
+ * instructions are issued, rather than defaulting to progbits.
+ * Note that this behavior violates the specification.
+
+#define ABIN_SMART_ADAPT
+
+*/
+
+#include "compiler.h"
+
+#include "nctype.h"
+
+#include "nasm.h"
+#include "nasmlib.h"
+#include "error.h"
+#include "saa.h"
+#include "stdscan.h"
+#include "labels.h"
+#include "eval.h"
+#include "outform.h"
+#include "outlib.h"
+
+#ifdef OF_BIN
+
+static FILE *rf = NULL;
+static void (*do_output)(void);
+
+/* Section flags keep track of which attributes the user has defined. */
+#define START_DEFINED 0x001
+#define ALIGN_DEFINED 0x002
+#define FOLLOWS_DEFINED 0x004
+#define VSTART_DEFINED 0x008
+#define VALIGN_DEFINED 0x010
+#define VFOLLOWS_DEFINED 0x020
+#define TYPE_DEFINED 0x040
+#define TYPE_PROGBITS 0x080
+#define TYPE_NOBITS 0x100
+
+/* This struct is used to keep track of symbols for map-file generation. */
+static struct bin_label {
+ char *name;
+ struct bin_label *next;
+} *no_seg_labels, **nsl_tail;
+
+static struct Section {
+ char *name;
+ struct SAA *contents;
+ int64_t length; /* section length in bytes */
+
+/* Section attributes */
+ int flags; /* see flag definitions above */
+ uint64_t align; /* section alignment */
+ uint64_t valign; /* notional section alignment */
+ uint64_t start; /* section start address */
+ uint64_t vstart; /* section virtual start address */
+ char *follows; /* the section that this one will follow */
+ char *vfollows; /* the section that this one will notionally follow */
+ int32_t start_index; /* NASM section id for non-relocated version */
+ int32_t vstart_index; /* the NASM section id */
+
+ struct bin_label *labels; /* linked-list of label handles for map output. */
+ struct bin_label **labels_end; /* Holds address of end of labels list. */
+ struct Section *prev; /* Points to previous section (implicit follows). */
+ struct Section *next; /* This links sections with a defined start address. */
+
+/* The extended bin format allows for sections to have a "virtual"
+ * start address. This is accomplished by creating two sections:
+ * one beginning at the Load Memory Address and the other beginning
+ * at the Virtual Memory Address. The LMA section is only used to
+ * define the section.<section_name>.start label, but there isn't
+ * any other good way for us to handle that label.
+ */
+
+} *sections, *last_section;
+
+static struct Reloc {
+ struct Reloc *next;
+ int32_t posn;
+ int32_t bytes;
+ int32_t secref;
+ int32_t secrel;
+ struct Section *target;
+} *relocs, **reloctail;
+
+static uint64_t origin;
+static int origin_defined;
+
+/* Stuff we need for map-file generation. */
+#define MAP_ORIGIN 1
+#define MAP_SUMMARY 2
+#define MAP_SECTIONS 4
+#define MAP_SYMBOLS 8
+static int map_control = 0;
+
+extern macros_t bin_stdmac[];
+
+static void add_reloc(struct Section *s, int32_t bytes, int32_t secref,
+ int32_t secrel)
+{
+ struct Reloc *r;
+
+ r = *reloctail = nasm_malloc(sizeof(struct Reloc));
+ reloctail = &r->next;
+ r->next = NULL;
+ r->posn = s->length;
+ r->bytes = bytes;
+ r->secref = secref;
+ r->secrel = secrel;
+ r->target = s;
+}
+
+static struct Section *find_section_by_name(const char *name)
+{
+ struct Section *s;
+
+ list_for_each(s, sections)
+ if (!strcmp(s->name, name))
+ break;
+ return s;
+}
+
+static struct Section *find_section_by_index(int32_t index)
+{
+ struct Section *s;
+
+ list_for_each(s, sections)
+ if ((index == s->vstart_index) || (index == s->start_index))
+ break;
+ return s;
+}
+
+static struct Section *create_section(char *name)
+{
+ struct Section *s = nasm_zalloc(sizeof(*s));
+
+ s->prev = last_section;
+ s->name = nasm_strdup(name);
+ s->labels_end = &(s->labels);
+ s->contents = saa_init(1L);
+
+ /* Register our sections with NASM. */
+ s->vstart_index = seg_alloc();
+ s->start_index = seg_alloc();
+
+ /* FIXME: Append to a tail, we need some helper */
+ last_section->next = s;
+ last_section = s;
+
+ return last_section;
+}
+
+static void bin_cleanup(void)
+{
+ struct Section *g, **gp;
+ struct Section *gs = NULL, **gsp;
+ struct Section *s, **sp;
+ struct Section *nobits = NULL, **nt;
+ struct Section *last_progbits;
+ struct bin_label *l;
+ struct Reloc *r;
+ uint64_t pend;
+ int h;
+
+ if (debug_level(1)) {
+ nasm_debug("bin_cleanup: Sections were initially referenced in this order:\n");
+ for (h = 0, s = sections; s; h++, s = s->next)
+ nasm_debug("%i. %s\n", h, s->name);
+ }
+
+ /* Assembly has completed, so now we need to generate the output file.
+ * Step 1: Separate progbits and nobits sections into separate lists.
+ * Step 2: Sort the progbits sections into their output order.
+ * Step 3: Compute start addresses for all progbits sections.
+ * Step 4: Compute vstart addresses for all sections.
+ * Step 5: Apply relocations.
+ * Step 6: Write the sections' data to the output file.
+ * Step 7: Generate the map file.
+ * Step 8: Release all allocated memory.
+ */
+
+ /* To do: Smart section-type adaptation could leave some empty sections
+ * without a defined type (progbits/nobits). Won't fix now since this
+ * feature will be disabled. */
+
+ /* Step 1: Split progbits and nobits sections into separate lists. */
+
+ nt = &nobits;
+ /* Move nobits sections into a separate list. Also pre-process nobits
+ * sections' attributes. */
+ for (sp = &sections->next, s = sections->next; s; s = *sp) { /* Skip progbits sections. */
+ if (s->flags & TYPE_PROGBITS) {
+ sp = &s->next;
+ continue;
+ }
+ /* Do some special pre-processing on nobits sections' attributes. */
+ if (s->flags & (START_DEFINED | ALIGN_DEFINED | FOLLOWS_DEFINED)) { /* Check for a mixture of real and virtual section attributes. */
+ if (s->flags & (VSTART_DEFINED | VALIGN_DEFINED |
+ VFOLLOWS_DEFINED))
+ nasm_fatal("cannot mix real and virtual attributes"
+ " in nobits section (%s)", s->name);
+ /* Real and virtual attributes mean the same thing for nobits sections. */
+ if (s->flags & START_DEFINED) {
+ s->vstart = s->start;
+ s->flags |= VSTART_DEFINED;
+ }
+ if (s->flags & ALIGN_DEFINED) {
+ s->valign = s->align;
+ s->flags |= VALIGN_DEFINED;
+ }
+ if (s->flags & FOLLOWS_DEFINED) {
+ s->vfollows = s->follows;
+ s->flags |= VFOLLOWS_DEFINED;
+ s->flags &= ~FOLLOWS_DEFINED;
+ }
+ }
+ /* Every section must have a start address. */
+ if (s->flags & VSTART_DEFINED) {
+ s->start = s->vstart;
+ s->flags |= START_DEFINED;
+ }
+ /* Move the section into the nobits list. */
+ *sp = s->next;
+ s->next = NULL;
+ *nt = s;
+ nt = &s->next;
+ }
+
+ /* Step 2: Sort the progbits sections into their output order. */
+
+ /* In Step 2 we move around sections in groups. A group
+ * begins with a section (group leader) that has a user-
+ * defined start address or follows section. The remainder
+ * of the group is made up of the sections that implicitly
+ * follow the group leader (i.e., they were defined after
+ * the group leader and were not given an explicit start
+ * address or follows section by the user). */
+
+ /* For anyone attempting to read this code:
+ * g (group) points to a group of sections, the first one of which has
+ * a user-defined start address or follows section.
+ * gp (g previous) holds the location of the pointer to g.
+ * gs (g scan) is a temp variable that we use to scan to the end of the group.
+ * gsp (gs previous) holds the location of the pointer to gs.
+ * nt (nobits tail) points to the nobits section-list tail.
+ */
+
+ /* Link all 'follows' groups to their proper position. To do
+ * this we need to know three things: the start of the group
+ * to relocate (g), the section it is following (s), and the
+ * end of the group we're relocating (gs). */
+ for (gp = &sections, g = sections; g; g = gs) { /* Find the next follows group that is out of place (g). */
+ if (!(g->flags & FOLLOWS_DEFINED)) {
+ while (g->next) {
+ if ((g->next->flags & FOLLOWS_DEFINED) &&
+ strcmp(g->name, g->next->follows))
+ break;
+ g = g->next;
+ }
+ if (!g->next)
+ break;
+ gp = &g->next;
+ g = g->next;
+ }
+ /* Find the section that this group follows (s). */
+ for (sp = &sections, s = sections;
+ s && strcmp(s->name, g->follows);
+ sp = &s->next, s = s->next) ;
+ if (!s)
+ nasm_fatal("section %s follows an invalid or"
+ " unknown section (%s)", g->name, g->follows);
+ if (s == g)
+ nasm_fatal("section %s is self following", s->name);
+ if (s->next && (s->next->flags & FOLLOWS_DEFINED) &&
+ !strcmp(s->name, s->next->follows))
+ nasm_fatal("sections %s and %s can't both follow"
+ " section %s", g->name, s->next->name, s->name);
+ /* Find the end of the current follows group (gs). */
+ for (gsp = &g->next, gs = g->next;
+ gs && (gs != s) && !(gs->flags & START_DEFINED);
+ gsp = &gs->next, gs = gs->next) {
+ if (gs->next && (gs->next->flags & FOLLOWS_DEFINED) &&
+ strcmp(gs->name, gs->next->follows)) {
+ gsp = &gs->next;
+ gs = gs->next;
+ break;
+ }
+ }
+ /* Re-link the group after its follows section. */
+ *gsp = s->next;
+ s->next = g;
+ *gp = gs;
+ }
+
+ /* Link all 'start' groups to their proper position. Once
+ * again we need to know g, s, and gs (see above). The main
+ * difference is we already know g since we sort by moving
+ * groups from the 'unsorted' list into a 'sorted' list (g
+ * will always be the first section in the unsorted list). */
+ for (g = sections, sections = NULL; g; g = gs) { /* Find the section that we will insert this group before (s). */
+ for (sp = &sections, s = sections; s; sp = &s->next, s = s->next)
+ if ((s->flags & START_DEFINED) && (g->start < s->start))
+ break;
+ /* Find the end of the group (gs). */
+ for (gs = g->next, gsp = &g->next;
+ gs && !(gs->flags & START_DEFINED);
+ gsp = &gs->next, gs = gs->next) ;
+ /* Re-link the group before the target section. */
+ *sp = g;
+ *gsp = s;
+ }
+
+ /* Step 3: Compute start addresses for all progbits sections. */
+
+ /* Make sure we have an origin and a start address for the first section. */
+ if (origin_defined) {
+ if (sections->flags & START_DEFINED) {
+ /* Make sure this section doesn't begin before the origin. */
+ if (sections->start < origin)
+ nasm_fatal("section %s begins"
+ " before program origin", sections->name);
+ } else if (sections->flags & ALIGN_DEFINED) {
+ sections->start = ALIGN(origin, sections->align);
+ } else {
+ sections->start = origin;
+ }
+ } else {
+ if (!(sections->flags & START_DEFINED))
+ sections->start = 0;
+ origin = sections->start;
+ }
+ sections->flags |= START_DEFINED;
+
+ /* Make sure each section has an explicit start address. If it
+ * doesn't, then compute one based its alignment and the end of
+ * the previous section. */
+ for (pend = sections->start, g = s = sections; g; g = g->next) { /* Find the next section that could cause an overlap situation
+ * (has a defined start address, and is not zero length). */
+ if (g == s)
+ for (s = g->next;
+ s && ((s->length == 0) || !(s->flags & START_DEFINED));
+ s = s->next) ;
+ /* Compute the start address of this section, if necessary. */
+ if (!(g->flags & START_DEFINED)) { /* Default to an alignment of 4 if unspecified. */
+ if (!(g->flags & ALIGN_DEFINED)) {
+ g->align = 4;
+ g->flags |= ALIGN_DEFINED;
+ }
+ /* Set the section start address. */
+ g->start = ALIGN(pend, g->align);
+ g->flags |= START_DEFINED;
+ }
+ /* Ugly special case for progbits sections' virtual attributes:
+ * If there is a defined valign, but no vstart and no vfollows, then
+ * we valign after the previous progbits section. This case doesn't
+ * really make much sense for progbits sections with a defined start
+ * address, but it is possible and we must do *something*.
+ * Not-so-ugly special case:
+ * If a progbits section has no virtual attributes, we set the
+ * vstart equal to the start address. */
+ if (!(g->flags & (VSTART_DEFINED | VFOLLOWS_DEFINED))) {
+ if (g->flags & VALIGN_DEFINED)
+ g->vstart = ALIGN(pend, g->valign);
+ else
+ g->vstart = g->start;
+ g->flags |= VSTART_DEFINED;
+ }
+ /* Ignore zero-length sections. */
+ if (g->start < pend)
+ continue;
+ /* Compute the span of this section. */
+ pend = g->start + g->length;
+ /* Check for section overlap. */
+ if (s) {
+ if (s->start < origin)
+ nasm_fatal("section %s beings before program origin",
+ s->name);
+ if (g->start > s->start)
+ nasm_fatal("sections %s ~ %s and %s overlap!",
+ gs->name, g->name, s->name);
+ if (pend > s->start)
+ nasm_fatal("sections %s and %s overlap!",
+ g->name, s->name);
+ }
+ /* Remember this section as the latest >0 length section. */
+ gs = g;
+ }
+
+ /* Step 4: Compute vstart addresses for all sections. */
+
+ /* Attach the nobits sections to the end of the progbits sections. */
+ for (s = sections; s->next; s = s->next) ;
+ s->next = nobits;
+ last_progbits = s;
+ /*
+ * Scan for sections that don't have a vstart address. If we find
+ * one we'll attempt to compute its vstart. If we can't compute
+ * the vstart, we leave it alone and come back to it in a
+ * subsequent scan. We continue scanning and re-scanning until
+ * we've gone one full cycle without computing any vstarts.
+ */
+ do { /* Do one full scan of the sections list. */
+ for (h = 0, g = sections; g; g = g->next) {
+ if (g->flags & VSTART_DEFINED)
+ continue;
+ /* Find the section that this one virtually follows. */
+ if (g->flags & VFOLLOWS_DEFINED) {
+ for (s = sections; s && strcmp(g->vfollows, s->name);
+ s = s->next) ;
+ if (!s)
+ nasm_fatal("section %s vfollows unknown section (%s)",
+ g->name, g->vfollows);
+ } else if (g->prev != NULL)
+ for (s = sections; s && (s != g->prev); s = s->next) ;
+ /* The .bss section is the only one with prev = NULL.
+ In this case we implicitly follow the last progbits
+ section. */
+ else
+ s = last_progbits;
+
+ /* If the section we're following has a vstart, we can proceed. */
+ if (s->flags & VSTART_DEFINED) { /* Default to virtual alignment of four. */
+ if (!(g->flags & VALIGN_DEFINED)) {
+ g->valign = 4;
+ g->flags |= VALIGN_DEFINED;
+ }
+ /* Compute the vstart address. */
+ g->vstart = ALIGN(s->vstart + s->length, g->valign);
+ g->flags |= VSTART_DEFINED;
+ h++;
+ /* Start and vstart mean the same thing for nobits sections. */
+ if (g->flags & TYPE_NOBITS)
+ g->start = g->vstart;
+ }
+ }
+ } while (h);
+
+ /* Now check for any circular vfollows references, which will manifest
+ * themselves as sections without a defined vstart. */
+ for (h = 0, s = sections; s; s = s->next) {
+ if (!(s->flags & VSTART_DEFINED)) { /* Non-fatal errors after assembly has completed are generally a
+ * no-no, but we'll throw a fatal one eventually so it's ok. */
+ nasm_nonfatal("cannot compute vstart for section %s", s->name);
+ h++;
+ }
+ }
+ if (h)
+ nasm_fatal("circular vfollows path detected");
+
+ if (debug_level(1)) {
+ nasm_debug("bin_cleanup: Confirm final section order for output file:\n");
+ for (h = 0, s = sections; s && (s->flags & TYPE_PROGBITS);
+ h++, s = s->next)
+ nasm_debug("%i. %s\n", h, s->name);
+ }
+
+ /* Step 5: Apply relocations. */
+
+ /* Prepare the sections for relocating. */
+ list_for_each(s, sections)
+ saa_rewind(s->contents);
+ /* Apply relocations. */
+ list_for_each(r, relocs) {
+ uint8_t *p, mydata[8];
+ int64_t l;
+ int b;
+
+ nasm_assert(r->bytes <= 8);
+
+ memset(mydata, 0, sizeof(mydata));
+
+ saa_fread(r->target->contents, r->posn, mydata, r->bytes);
+ p = mydata;
+ l = 0;
+ for (b = r->bytes - 1; b >= 0; b--)
+ l = (l << 8) + mydata[b];
+
+ s = find_section_by_index(r->secref);
+ if (s) {
+ if (r->secref == s->start_index)
+ l += s->start;
+ else
+ l += s->vstart;
+ }
+ s = find_section_by_index(r->secrel);
+ if (s) {
+ if (r->secrel == s->start_index)
+ l -= s->start;
+ else
+ l -= s->vstart;
+ }
+
+ WRITEADDR(p, l, r->bytes);
+ saa_fwrite(r->target->contents, r->posn, mydata, r->bytes);
+ }
+
+ /* Step 6: Write the section data to the output file. */
+ do_output();
+
+ /* Step 7: Generate the map file. */
+
+ if (map_control) {
+ static const char not_defined[] = "not defined";
+
+ /* Display input and output file names. */
+ fprintf(rf, "\n- NASM Map file ");
+ for (h = 63; h; h--)
+ fputc('-', rf);
+ fprintf(rf, "\n\nSource file: %s\nOutput file: %s\n\n",
+ inname, outname);
+
+ if (map_control & MAP_ORIGIN) { /* Display program origin. */
+ fprintf(rf, "-- Program origin ");
+ for (h = 61; h; h--)
+ fputc('-', rf);
+ fprintf(rf, "\n\n%08"PRIX64"\n\n", origin);
+ }
+ /* Display sections summary. */
+ if (map_control & MAP_SUMMARY) {
+ fprintf(rf, "-- Sections (summary) ");
+ for (h = 57; h; h--)
+ fputc('-', rf);
+ fprintf(rf, "\n\nVstart Start Stop "
+ "Length Class Name\n");
+ list_for_each(s, sections) {
+ fprintf(rf, "%16"PRIX64" %16"PRIX64" %16"PRIX64" %08"PRIX64" ",
+ s->vstart, s->start, s->start + s->length,
+ s->length);
+ if (s->flags & TYPE_PROGBITS)
+ fprintf(rf, "progbits ");
+ else
+ fprintf(rf, "nobits ");
+ fprintf(rf, "%s\n", s->name);
+ }
+ fprintf(rf, "\n");
+ }
+ /* Display detailed section information. */
+ if (map_control & MAP_SECTIONS) {
+ fprintf(rf, "-- Sections (detailed) ");
+ for (h = 56; h; h--)
+ fputc('-', rf);
+ fprintf(rf, "\n\n");
+ list_for_each(s, sections) {
+ fprintf(rf, "---- Section %s ", s->name);
+ if (strlen(s->name) < 65)
+ for (h = 65 - strlen(s->name); h; h--)
+ fputc('-', rf);
+ fprintf(rf, "\n\nclass: ");
+ if (s->flags & TYPE_PROGBITS)
+ fprintf(rf, "progbits");
+ else
+ fprintf(rf, "nobits");
+ fprintf(rf, "\nlength: %16"PRIX64"\nstart: %16"PRIX64""
+ "\nalign: ", s->length, s->start);
+ if (s->flags & ALIGN_DEFINED)
+ fprintf(rf, "%16"PRIX64"", s->align);
+ else
+ fputs(not_defined, rf);
+ fprintf(rf, "\nfollows: ");
+ if (s->flags & FOLLOWS_DEFINED)
+ fprintf(rf, "%s", s->follows);
+ else
+ fputs(not_defined, rf);
+ fprintf(rf, "\nvstart: %16"PRIX64"\nvalign: ", s->vstart);
+ if (s->flags & VALIGN_DEFINED)
+ fprintf(rf, "%16"PRIX64"", s->valign);
+ else
+ fputs(not_defined, rf);
+ fprintf(rf, "\nvfollows: ");
+ if (s->flags & VFOLLOWS_DEFINED)
+ fprintf(rf, "%s", s->vfollows);
+ else
+ fputs(not_defined, rf);
+ fprintf(rf, "\n\n");
+ }
+ }
+ /* Display symbols information. */
+ if (map_control & MAP_SYMBOLS) {
+ int32_t segment;
+ int64_t offset;
+ enum label_type found_label;
+
+ fprintf(rf, "-- Symbols ");
+ for (h = 68; h; h--)
+ fputc('-', rf);
+ fprintf(rf, "\n\n");
+ if (no_seg_labels) {
+ fprintf(rf, "---- No Section ");
+ for (h = 63; h; h--)
+ fputc('-', rf);
+ fprintf(rf, "\n\nValue Name\n");
+ list_for_each(l, no_seg_labels) {
+ found_label = lookup_label(l->name, &segment, &offset);
+ nasm_assert(found_label != LBL_none);
+ fprintf(rf, "%08"PRIX64" %s\n", offset, l->name);
+ }
+ fprintf(rf, "\n\n");
+ }
+ list_for_each(s, sections) {
+ if (s->labels) {
+ fprintf(rf, "---- Section %s ", s->name);
+ for (h = 65 - strlen(s->name); h; h--)
+ fputc('-', rf);
+ fprintf(rf, "\n\nReal Virtual Name\n");
+ list_for_each(l, s->labels) {
+ found_label = lookup_label(l->name, &segment, &offset);
+ nasm_assert(found_label != LBL_none);
+ fprintf(rf, "%16"PRIX64" %16"PRIX64" %s\n",
+ s->start + offset, s->vstart + offset,
+ l->name);
+ }
+ fprintf(rf, "\n");
+ }
+ }
+ }
+ }
+
+ /* Close the report file. */
+ if (map_control && (rf != stdout) && (rf != stderr))
+ fclose(rf);
+
+ /* Step 8: Release all allocated memory. */
+
+ /* Free sections, label pointer structs, etc.. */
+ while (sections) {
+ s = sections;
+ sections = s->next;
+ saa_free(s->contents);
+ nasm_free(s->name);
+ if (s->flags & FOLLOWS_DEFINED)
+ nasm_free(s->follows);
+ if (s->flags & VFOLLOWS_DEFINED)
+ nasm_free(s->vfollows);
+ while (s->labels) {
+ l = s->labels;
+ s->labels = l->next;
+ nasm_free(l);
+ }
+ nasm_free(s);
+ }
+
+ /* Free no-section labels. */
+ while (no_seg_labels) {
+ l = no_seg_labels;
+ no_seg_labels = l->next;
+ nasm_free(l);
+ }
+
+ /* Free relocation structures. */
+ while (relocs) {
+ r = relocs->next;
+ nasm_free(relocs);
+ relocs = r;
+ }
+}
+
+static void bin_out(int32_t segto, const void *data,
+ enum out_type type, uint64_t size,
+ int32_t segment, int32_t wrt)
+{
+ uint8_t *p, mydata[8];
+ struct Section *s;
+
+ if (wrt != NO_SEG) {
+ wrt = NO_SEG; /* continue to do _something_ */
+ nasm_nonfatal("WRT not supported by binary output format");
+ }
+
+ /* Find the segment we are targeting. */
+ s = find_section_by_index(segto);
+ if (!s)
+ nasm_panic("code directed to nonexistent segment?");
+
+ /* "Smart" section-type adaptation code. */
+ if (!(s->flags & TYPE_DEFINED)) {
+ if (type == OUT_RESERVE)
+ s->flags |= TYPE_DEFINED | TYPE_NOBITS;
+ else
+ s->flags |= TYPE_DEFINED | TYPE_PROGBITS;
+ }
+
+ if ((s->flags & TYPE_NOBITS) && (type != OUT_RESERVE))
+ nasm_warn(WARN_OTHER, "attempt to initialize memory in a"
+ " nobits section: ignored");
+
+ switch (type) {
+ case OUT_ADDRESS:
+ {
+ int asize = abs((int)size);
+
+ if (segment != NO_SEG && !find_section_by_index(segment)) {
+ if (segment % 2)
+ nasm_nonfatal("binary output format does not support"
+ " segment base references");
+ else
+ nasm_nonfatal("binary output format does not support"
+ " external references");
+ segment = NO_SEG;
+ }
+ if (s->flags & TYPE_PROGBITS) {
+ if (segment != NO_SEG)
+ add_reloc(s, asize, segment, -1L);
+ p = mydata;
+ WRITEADDR(p, *(int64_t *)data, asize);
+ saa_wbytes(s->contents, mydata, asize);
+ }
+
+ /*
+ * Reassign size with sign dropped, we will need it
+ * for section length calculation.
+ */
+ size = asize;
+ break;
+ }
+
+ case OUT_RAWDATA:
+ if (s->flags & TYPE_PROGBITS)
+ saa_wbytes(s->contents, data, size);
+ break;
+
+ case OUT_RESERVE:
+ if (s->flags & TYPE_PROGBITS) {
+ nasm_warn(WARN_ZEROING, "uninitialized space declared in"
+ " %s section: zeroing", s->name);
+ saa_wbytes(s->contents, NULL, size);
+ }
+ break;
+
+ case OUT_REL1ADR:
+ case OUT_REL2ADR:
+ case OUT_REL4ADR:
+ case OUT_REL8ADR:
+ {
+ int64_t addr = *(int64_t *)data - size;
+ size = realsize(type, size);
+ if (segment != NO_SEG && !find_section_by_index(segment)) {
+ if (segment % 2)
+ nasm_nonfatal("binary output format does not support"
+ " segment base references");
+ else
+ nasm_nonfatal("binary output format does not support"
+ " external references");
+ segment = NO_SEG;
+ }
+ if (s->flags & TYPE_PROGBITS) {
+ add_reloc(s, size, segment, segto);
+ p = mydata;
+ WRITEADDR(p, addr - s->length, size);
+ saa_wbytes(s->contents, mydata, size);
+ }
+ break;
+ }
+
+ default:
+ nasm_nonfatal("unsupported relocation type %d\n", type);
+ break;
+ }
+
+ s->length += size;
+}
+
+static void bin_deflabel(char *name, int32_t segment, int64_t offset,
+ int is_global, char *special)
+{
+ (void)segment; /* Don't warn that this parameter is unused */
+ (void)offset; /* Don't warn that this parameter is unused */
+
+ if (special)
+ nasm_nonfatal("binary format does not support any"
+ " special symbol types");
+ else if (name[0] == '.' && name[1] == '.' && name[2] != '@')
+ nasm_nonfatal("unrecognised special symbol `%s'", name);
+ else if (is_global == 2)
+ nasm_nonfatal("binary output format does not support common"
+ " variables");
+ else {
+ struct Section *s;
+ struct bin_label ***ltp;
+
+ /* Remember label definition so we can look it up later when
+ * creating the map file. */
+ s = find_section_by_index(segment);
+ if (s)
+ ltp = &(s->labels_end);
+ else
+ ltp = &nsl_tail;
+ (**ltp) = nasm_malloc(sizeof(struct bin_label));
+ (**ltp)->name = name;
+ (**ltp)->next = NULL;
+ *ltp = &((**ltp)->next);
+ }
+
+}
+
+/* These constants and the following function are used
+ * by bin_secname() to parse attribute assignments. */
+
+enum { ATTRIB_START, ATTRIB_ALIGN, ATTRIB_FOLLOWS,
+ ATTRIB_VSTART, ATTRIB_VALIGN, ATTRIB_VFOLLOWS,
+ ATTRIB_NOBITS, ATTRIB_PROGBITS
+};
+
+static int bin_read_attribute(char **line, int *attribute,
+ uint64_t *value)
+{
+ expr *e;
+ int attrib_name_size;
+ struct tokenval tokval;
+ char *exp;
+
+ /* Skip whitespace. */
+ while (**line && nasm_isspace(**line))
+ (*line)++;
+ if (!**line)
+ return 0;
+
+ /* Figure out what attribute we're reading. */
+ if (!nasm_strnicmp(*line, "align=", 6)) {
+ *attribute = ATTRIB_ALIGN;
+ attrib_name_size = 6;
+ } else {
+ if (!nasm_strnicmp(*line, "start=", 6)) {
+ *attribute = ATTRIB_START;
+ attrib_name_size = 6;
+ } else if (!nasm_strnicmp(*line, "follows=", 8)) {
+ *attribute = ATTRIB_FOLLOWS;
+ *line += 8;
+ return 1;
+ } else if (!nasm_strnicmp(*line, "vstart=", 7)) {
+ *attribute = ATTRIB_VSTART;
+ attrib_name_size = 7;
+ } else if (!nasm_strnicmp(*line, "valign=", 7)) {
+ *attribute = ATTRIB_VALIGN;
+ attrib_name_size = 7;
+ } else if (!nasm_strnicmp(*line, "vfollows=", 9)) {
+ *attribute = ATTRIB_VFOLLOWS;
+ *line += 9;
+ return 1;
+ } else if (!nasm_strnicmp(*line, "nobits", 6) &&
+ (nasm_isspace((*line)[6]) || ((*line)[6] == '\0'))) {
+ *attribute = ATTRIB_NOBITS;
+ *line += 6;
+ return 1;
+ } else if (!nasm_strnicmp(*line, "progbits", 8) &&
+ (nasm_isspace((*line)[8]) || ((*line)[8] == '\0'))) {
+ *attribute = ATTRIB_PROGBITS;
+ *line += 8;
+ return 1;
+ } else
+ return 0;
+ }
+
+ /* Find the end of the expression. */
+ if ((*line)[attrib_name_size] != '(') {
+ /* Single term (no parenthesis). */
+ exp = *line += attrib_name_size;
+ while (**line && !nasm_isspace(**line))
+ (*line)++;
+ if (**line) {
+ **line = '\0';
+ (*line)++;
+ }
+ } else {
+ char c;
+ int pcount = 1;
+
+ /* Full expression (delimited by parenthesis) */
+ exp = *line += attrib_name_size + 1;
+ while (1) {
+ (*line) += strcspn(*line, "()'\"");
+ if (**line == '(') {
+ ++(*line);
+ ++pcount;
+ }
+ if (**line == ')') {
+ ++(*line);
+ --pcount;
+ if (!pcount)
+ break;
+ }
+ if ((**line == '"') || (**line == '\'')) {
+ c = **line;
+ while (**line) {
+ ++(*line);
+ if (**line == c)
+ break;
+ }
+ if (!**line) {
+ nasm_nonfatal("invalid syntax in `section' directive");
+ return -1;
+ }
+ ++(*line);
+ }
+ if (!**line) {
+ nasm_nonfatal("expecting `)'");
+ return -1;
+ }
+ }
+ *(*line - 1) = '\0'; /* Terminate the expression. */
+ }
+
+ /* Check for no value given. */
+ if (!*exp) {
+ nasm_warn(WARN_OTHER, "No value given to attribute in"
+ " `section' directive");
+ return -1;
+ }
+
+ /* Read and evaluate the expression. */
+ stdscan_reset();
+ stdscan_set(exp);
+ tokval.t_type = TOKEN_INVALID;
+ e = evaluate(stdscan, NULL, &tokval, NULL, 1, NULL);
+ if (e) {
+ if (!is_really_simple(e)) {
+ nasm_nonfatal("section attribute value must be"
+ " a critical expression");
+ return -1;
+ }
+ } else {
+ nasm_nonfatal("Invalid attribute value"
+ " specified in `section' directive.");
+ return -1;
+ }
+ *value = (uint64_t)reloc_value(e);
+ return 1;
+}
+
+static void bin_sectalign(int32_t seg, unsigned int value)
+{
+ struct Section *s = find_section_by_index(seg);
+
+ if (!s || !is_power2(value))
+ return;
+
+ if (value > s->align)
+ s->align = value;
+
+ if (!(s->flags & ALIGN_DEFINED))
+ s->flags |= ALIGN_DEFINED;
+}
+
+static void bin_assign_attributes(struct Section *sec, char *astring)
+{
+ int attribute, check;
+ uint64_t value;
+ char *p;
+
+ while (1) { /* Get the next attribute. */
+ check = bin_read_attribute(&astring, &attribute, &value);
+ /* Skip bad attribute. */
+ if (check == -1)
+ continue;
+ /* Unknown section attribute, so skip it and warn the user. */
+ if (!check) {
+ if (!*astring)
+ break; /* End of line. */
+ else {
+ p = astring;
+ while (*astring && !nasm_isspace(*astring))
+ astring++;
+ if (*astring) {
+ *astring = '\0';
+ astring++;
+ }
+ nasm_warn(WARN_OTHER, "ignoring unknown section attribute: \"%s\"", p);
+ }
+ continue;
+ }
+
+ switch (attribute) { /* Handle nobits attribute. */
+ case ATTRIB_NOBITS:
+ if ((sec->flags & TYPE_DEFINED)
+ && (sec->flags & TYPE_PROGBITS))
+ nasm_nonfatal("attempt to change section type"
+ " from progbits to nobits");
+ else
+ sec->flags |= TYPE_DEFINED | TYPE_NOBITS;
+ continue;
+
+ /* Handle progbits attribute. */
+ case ATTRIB_PROGBITS:
+ if ((sec->flags & TYPE_DEFINED) && (sec->flags & TYPE_NOBITS))
+ nasm_nonfatal("attempt to change section type"
+ " from nobits to progbits");
+ else
+ sec->flags |= TYPE_DEFINED | TYPE_PROGBITS;
+ continue;
+
+ /* Handle align attribute. */
+ case ATTRIB_ALIGN:
+ if (!value || ((value - 1) & value)) {
+ nasm_nonfatal("argument to `align' is not a power of two");
+ } else {
+ /*
+ * Alignment is already satisfied if
+ * the previous align value is greater
+ */
+ if ((sec->flags & ALIGN_DEFINED) && (value < sec->align))
+ value = sec->align;
+
+ /* Don't allow a conflicting align value. */
+ if ((sec->flags & START_DEFINED) && (sec->start & (value - 1))) {
+ nasm_nonfatal("`align' value conflicts with section start address");
+ } else {
+ sec->align = value;
+ sec->flags |= ALIGN_DEFINED;
+ }
+ }
+ continue;
+
+ /* Handle valign attribute. */
+ case ATTRIB_VALIGN:
+ if (!value || ((value - 1) & value))
+ nasm_nonfatal("argument to `valign' is not a power of two");
+ else { /* Alignment is already satisfied if the previous
+ * align value is greater. */
+ if ((sec->flags & VALIGN_DEFINED) && (value < sec->valign))
+ value = sec->valign;
+
+ /* Don't allow a conflicting valign value. */
+ if ((sec->flags & VSTART_DEFINED)
+ && (sec->vstart & (value - 1)))
+ nasm_nonfatal("`valign' value conflicts with `vstart' address");
+ else {
+ sec->valign = value;
+ sec->flags |= VALIGN_DEFINED;
+ }
+ }
+ continue;
+
+ /* Handle start attribute. */
+ case ATTRIB_START:
+ if (sec->flags & FOLLOWS_DEFINED)
+ nasm_nonfatal("cannot combine `start' and `follows'"
+ " section attributes");
+ else if ((sec->flags & START_DEFINED) && (value != sec->start))
+ nasm_nonfatal("section start address redefined");
+ else {
+ sec->start = value;
+ sec->flags |= START_DEFINED;
+ if (sec->flags & ALIGN_DEFINED) {
+ if (sec->start & (sec->align - 1))
+ nasm_nonfatal("`start' address conflicts"
+ " with section alignment");
+ sec->flags ^= ALIGN_DEFINED;
+ }
+ }
+ continue;
+
+ /* Handle vstart attribute. */
+ case ATTRIB_VSTART:
+ if (sec->flags & VFOLLOWS_DEFINED)
+ nasm_nonfatal("cannot combine `vstart' and `vfollows'"
+ " section attributes");
+ else if ((sec->flags & VSTART_DEFINED)
+ && (value != sec->vstart))
+ nasm_nonfatal("section virtual start address"
+ " (vstart) redefined");
+ else {
+ sec->vstart = value;
+ sec->flags |= VSTART_DEFINED;
+ if (sec->flags & VALIGN_DEFINED) {
+ if (sec->vstart & (sec->valign - 1))
+ nasm_nonfatal("`vstart' address conflicts"
+ " with `valign' value");
+ sec->flags ^= VALIGN_DEFINED;
+ }
+ }
+ continue;
+
+ /* Handle follows attribute. */
+ case ATTRIB_FOLLOWS:
+ p = astring;
+ astring += strcspn(astring, " \t");
+ if (astring == p)
+ nasm_nonfatal("expecting section name for `follows'"
+ " attribute");
+ else {
+ *(astring++) = '\0';
+ if (sec->flags & START_DEFINED)
+ nasm_nonfatal("cannot combine `start' and `follows'"
+ " section attributes");
+ sec->follows = nasm_strdup(p);
+ sec->flags |= FOLLOWS_DEFINED;
+ }
+ continue;
+
+ /* Handle vfollows attribute. */
+ case ATTRIB_VFOLLOWS:
+ if (sec->flags & VSTART_DEFINED)
+ nasm_nonfatal("cannot combine `vstart' and `vfollows'"
+ " section attributes");
+ else {
+ p = astring;
+ astring += strcspn(astring, " \t");
+ if (astring == p)
+ nasm_nonfatal("expecting section name for `vfollows'"
+ " attribute");
+ else {
+ *(astring++) = '\0';
+ sec->vfollows = nasm_strdup(p);
+ sec->flags |= VFOLLOWS_DEFINED;
+ }
+ }
+ continue;
+ }
+ }
+}
+
+static void bin_define_section_labels(void)
+{
+ static int labels_defined = 0;
+ struct Section *sec;
+ char *label_name;
+ size_t base_len;
+
+ if (labels_defined)
+ return;
+ list_for_each(sec, sections) {
+ base_len = strlen(sec->name) + 8;
+ label_name = nasm_malloc(base_len + 8);
+ strcpy(label_name, "section.");
+ strcpy(label_name + 8, sec->name);
+
+ /* section.<name>.start */
+ strcpy(label_name + base_len, ".start");
+ define_label(label_name, sec->start_index, 0L, false);
+
+ /* section.<name>.vstart */
+ strcpy(label_name + base_len, ".vstart");
+ define_label(label_name, sec->vstart_index, 0L, false);
+
+ nasm_free(label_name);
+ }
+ labels_defined = 1;
+}
+
+static int32_t bin_secname(char *name, int *bits)
+{
+ char *p;
+ struct Section *sec;
+
+ /* bin_secname is called with *name = NULL at the start of each
+ * pass. Use this opportunity to establish the default section
+ * (default is BITS-16 ".text" segment).
+ */
+ if (!name) {
+ /* Reset ORG and section attributes at the start of each pass. */
+ origin_defined = 0;
+ list_for_each(sec, sections)
+ sec->flags &= ~(START_DEFINED | VSTART_DEFINED |
+ ALIGN_DEFINED | VALIGN_DEFINED);
+
+ /* Define section start and vstart labels. */
+ if (!pass_first())
+ bin_define_section_labels();
+
+ /* Establish the default (.text) section. */
+ *bits = 16;
+ sec = find_section_by_name(".text");
+ sec->flags |= TYPE_DEFINED | TYPE_PROGBITS;
+ return sec->vstart_index;
+ }
+
+ /* Attempt to find the requested section. If it does not
+ * exist, create it. */
+ p = name;
+ while (*p && !nasm_isspace(*p))
+ p++;
+ if (*p)
+ *p++ = '\0';
+ sec = find_section_by_name(name);
+ if (!sec) {
+ sec = create_section(name);
+ if (!strcmp(name, ".data"))
+ sec->flags |= TYPE_DEFINED | TYPE_PROGBITS;
+ else if (!strcmp(name, ".bss")) {
+ sec->flags |= TYPE_DEFINED | TYPE_NOBITS;
+ sec->prev = NULL;
+ }
+ }
+
+ /* Handle attribute assignments. */
+ if (!pass_first())
+ bin_assign_attributes(sec, p);
+
+#ifndef ABIN_SMART_ADAPT
+ /* The following line disables smart adaptation of
+ * PROGBITS/NOBITS section types (it forces sections to
+ * default to PROGBITS). */
+ if (!pass_first() && !(sec->flags & TYPE_DEFINED))
+ sec->flags |= TYPE_DEFINED | TYPE_PROGBITS;
+#endif
+
+ return sec->vstart_index;
+}
+
+static enum directive_result
+bin_directive(enum directive directive, char *args)
+{
+ switch (directive) {
+ case D_ORG:
+ {
+ struct tokenval tokval;
+ uint64_t value;
+ expr *e;
+
+ stdscan_reset();
+ stdscan_set(args);
+ tokval.t_type = TOKEN_INVALID;
+ e = evaluate(stdscan, NULL, &tokval, NULL, 1, NULL);
+ if (e) {
+ if (!is_really_simple(e))
+ nasm_nonfatal("org value must be a critical"
+ " expression");
+ else {
+ value = reloc_value(e);
+ /* Check for ORG redefinition. */
+ if (origin_defined && (value != origin))
+ nasm_nonfatal("program origin redefined");
+ else {
+ origin = value;
+ origin_defined = 1;
+ }
+ }
+ } else
+ nasm_nonfatal("No or invalid offset specified"
+ " in ORG directive.");
+ return DIRR_OK;
+ }
+ case D_MAP:
+ {
+ /* The 'map' directive allows the user to generate section
+ * and symbol information to stdout, stderr, or to a file. */
+ char *p;
+
+ if (!pass_first())
+ return DIRR_OK;
+ args += strspn(args, " \t");
+ while (*args) {
+ p = args;
+ args += strcspn(args, " \t");
+ if (*args != '\0')
+ *(args++) = '\0';
+ if (!nasm_stricmp(p, "all"))
+ map_control |=
+ MAP_ORIGIN | MAP_SUMMARY | MAP_SECTIONS | MAP_SYMBOLS;
+ else if (!nasm_stricmp(p, "brief"))
+ map_control |= MAP_ORIGIN | MAP_SUMMARY;
+ else if (!nasm_stricmp(p, "sections"))
+ map_control |= MAP_ORIGIN | MAP_SUMMARY | MAP_SECTIONS;
+ else if (!nasm_stricmp(p, "segments"))
+ map_control |= MAP_ORIGIN | MAP_SUMMARY | MAP_SECTIONS;
+ else if (!nasm_stricmp(p, "symbols"))
+ map_control |= MAP_SYMBOLS;
+ else if (!rf) {
+ if (!nasm_stricmp(p, "stdout"))
+ rf = stdout;
+ else if (!nasm_stricmp(p, "stderr"))
+ rf = stderr;
+ else { /* Must be a filename. */
+ rf = nasm_open_write(p, NF_TEXT);
+ if (!rf) {
+ nasm_warn(WARN_OTHER, "unable to open map file `%s'", p);
+ map_control = 0;
+ return DIRR_OK;
+ }
+ }
+ } else
+ nasm_warn(WARN_OTHER, "map file already specified");
+ }
+ if (map_control == 0)
+ map_control |= MAP_ORIGIN | MAP_SUMMARY;
+ if (!rf)
+ rf = stdout;
+ return DIRR_OK;
+ }
+ default:
+ return DIRR_UNKNOWN;
+ }
+}
+
+const struct ofmt of_bin, of_ith, of_srec;
+static void binfmt_init(void);
+static void do_output_bin(void);
+static void do_output_ith(void);
+static void do_output_srec(void);
+
+static void bin_init(void)
+{
+ do_output = do_output_bin;
+ binfmt_init();
+}
+
+static void ith_init(void)
+{
+ do_output = do_output_ith;
+ binfmt_init();
+}
+
+static void srec_init(void)
+{
+ do_output = do_output_srec;
+ binfmt_init();
+}
+
+static void binfmt_init(void)
+{
+ relocs = NULL;
+ reloctail = &relocs;
+ origin_defined = 0;
+ no_seg_labels = NULL;
+ nsl_tail = &no_seg_labels;
+
+ /* Create default section (.text). */
+ sections = last_section = nasm_zalloc(sizeof(struct Section));
+ last_section->name = nasm_strdup(".text");
+ last_section->contents = saa_init(1L);
+ last_section->flags = TYPE_DEFINED | TYPE_PROGBITS;
+ last_section->labels_end = &(last_section->labels);
+ last_section->start_index = seg_alloc();
+ last_section->vstart_index = seg_alloc();
+}
+
+/* Generate binary file output */
+static void do_output_bin(void)
+{
+ struct Section *s;
+ uint64_t addr = origin;
+
+ /* Write the progbits sections to the output file. */
+ list_for_each(s, sections) {
+ /* Skip non-progbits sections */
+ if (!(s->flags & TYPE_PROGBITS))
+ continue;
+ /* Skip zero-length sections */
+ if (s->length == 0)
+ continue;
+
+ /* Pad the space between sections. */
+ nasm_assert(addr <= s->start);
+ fwritezero(s->start - addr, ofile);
+
+ /* Write the section to the output file. */
+ saa_fpwrite(s->contents, ofile);
+
+ /* Keep track of the current file position */
+ addr = s->start + s->length;
+ }
+}
+
+/* Generate Intel hex file output */
+static void write_ith_record(unsigned int len, uint16_t addr,
+ uint8_t type, void *data)
+{
+ char buf[1+2+4+2+255*2+2+2];
+ char *p = buf;
+ uint8_t csum, *dptr = data;
+ unsigned int i;
+
+ nasm_assert(len <= 255);
+
+ csum = len + addr + (addr >> 8) + type;
+ for (i = 0; i < len; i++)
+ csum += dptr[i];
+ csum = -csum;
+
+ p += sprintf(p, ":%02X%04X%02X", len, addr, type);
+ for (i = 0; i < len; i++)
+ p += sprintf(p, "%02X", dptr[i]);
+ p += sprintf(p, "%02X\n", csum);
+
+ nasm_write(buf, p-buf, ofile);
+}
+
+static void do_output_ith(void)
+{
+ uint8_t buf[32];
+ struct Section *s;
+ uint64_t addr, hiaddr, hilba;
+ uint64_t length;
+ unsigned int chunk;
+
+ /* Write the progbits sections to the output file. */
+ hilba = 0;
+ list_for_each(s, sections) {
+ /* Skip non-progbits sections */
+ if (!(s->flags & TYPE_PROGBITS))
+ continue;
+ /* Skip zero-length sections */
+ if (s->length == 0)
+ continue;
+
+ addr = s->start;
+ length = s->length;
+ saa_rewind(s->contents);
+
+ while (length) {
+ hiaddr = addr >> 16;
+ if (hiaddr != hilba) {
+ buf[0] = hiaddr >> 8;
+ buf[1] = hiaddr;
+ write_ith_record(2, 0, 4, buf);
+ hilba = hiaddr;
+ }
+
+ chunk = 32 - (addr & 31);
+ if (length < chunk)
+ chunk = length;
+
+ saa_rnbytes(s->contents, buf, chunk);
+ write_ith_record(chunk, (uint16_t)addr, 0, buf);
+
+ addr += chunk;
+ length -= chunk;
+ }
+ }
+
+ /* Write closing record */
+ write_ith_record(0, 0, 1, NULL);
+}
+
+/* Generate Motorola S-records */
+static void write_srecord(unsigned int len, unsigned int alen,
+ uint32_t addr, uint8_t type, void *data)
+{
+ char buf[2+2+8+255*2+2+2];
+ char *p = buf;
+ uint8_t csum, *dptr = data;
+ unsigned int i;
+
+ nasm_assert(len <= 255);
+
+ switch (alen) {
+ case 2:
+ addr &= 0xffff;
+ break;
+ case 3:
+ addr &= 0xffffff;
+ break;
+ case 4:
+ break;
+ default:
+ panic();
+ break;
+ }
+
+ csum = (len+alen+1) + addr + (addr >> 8) + (addr >> 16) + (addr >> 24);
+ for (i = 0; i < len; i++)
+ csum += dptr[i];
+ csum = 0xff-csum;
+
+ p += sprintf(p, "S%c%02X%0*X", type, len+alen+1, alen*2, addr);
+ for (i = 0; i < len; i++)
+ p += sprintf(p, "%02X", dptr[i]);
+ p += sprintf(p, "%02X\n", csum);
+
+ nasm_write(buf, p-buf, ofile);
+}
+
+static void do_output_srec(void)
+{
+ uint8_t buf[32];
+ struct Section *s;
+ uint64_t addr, maxaddr;
+ uint64_t length;
+ int alen;
+ unsigned int chunk;
+ char dtype, etype;
+
+ maxaddr = 0;
+ list_for_each(s, sections) {
+ /* Skip non-progbits sections */
+ if (!(s->flags & TYPE_PROGBITS))
+ continue;
+ /* Skip zero-length sections */
+ if (s->length == 0)
+ continue;
+
+ addr = s->start + s->length - 1;
+ if (addr > maxaddr)
+ maxaddr = addr;
+ }
+
+ if (maxaddr <= 0xffff) {
+ alen = 2;
+ dtype = '1'; /* S1 = 16-bit data */
+ etype = '9'; /* S9 = 16-bit end */
+ } else if (maxaddr <= 0xffffff) {
+ alen = 3;
+ dtype = '2'; /* S2 = 24-bit data */
+ etype = '8'; /* S8 = 24-bit end */
+ } else {
+ alen = 4;
+ dtype = '3'; /* S3 = 32-bit data */
+ etype = '7'; /* S7 = 32-bit end */
+ }
+
+ /* Write head record */
+ write_srecord(0, 2, 0, '0', NULL);
+
+ /* Write the progbits sections to the output file. */
+ list_for_each(s, sections) {
+ /* Skip non-progbits sections */
+ if (!(s->flags & TYPE_PROGBITS))
+ continue;
+ /* Skip zero-length sections */
+ if (s->length == 0)
+ continue;
+
+ addr = s->start;
+ length = s->length;
+ saa_rewind(s->contents);
+
+ while (length) {
+ chunk = 32 - (addr & 31);
+ if (length < chunk)
+ chunk = length;
+
+ saa_rnbytes(s->contents, buf, chunk);
+ write_srecord(chunk, alen, (uint32_t)addr, dtype, buf);
+
+ addr += chunk;
+ length -= chunk;
+ }
+ }
+
+ /* Write closing record */
+ write_srecord(0, alen, 0, etype, NULL);
+}
+
+
+const struct ofmt of_bin = {
+ "Flat raw binary (MS-DOS, embedded, ...)",
+ "bin",
+ "",
+ 0,
+ 64,
+ null_debug_arr,
+ &null_debug_form,
+ bin_stdmac,
+ bin_init,
+ null_reset,
+ nasm_do_legacy_output,
+ bin_out,
+ bin_deflabel,
+ bin_secname,
+ NULL,
+ bin_sectalign,
+ null_segbase,
+ bin_directive,
+ bin_cleanup,
+ NULL /* pragma list */
+};
+
+const struct ofmt of_ith = {
+ "Intel Hex encoded flat binary",
+ "ith",
+ ".ith", /* really should have been ".hex"... */
+ OFMT_TEXT,
+ 64,
+ null_debug_arr,
+ &null_debug_form,
+ bin_stdmac,
+ ith_init,
+ null_reset,
+ nasm_do_legacy_output,
+ bin_out,
+ bin_deflabel,
+ bin_secname,
+ NULL,
+ bin_sectalign,
+ null_segbase,
+ bin_directive,
+ bin_cleanup,
+ NULL /* pragma list */
+};
+
+const struct ofmt of_srec = {
+ "Motorola S-records encoded flat binary",
+ "srec",
+ ".srec",
+ OFMT_TEXT,
+ 64,
+ null_debug_arr,
+ &null_debug_form,
+ bin_stdmac,
+ srec_init,
+ null_reset,
+ nasm_do_legacy_output,
+ bin_out,
+ bin_deflabel,
+ bin_secname,
+ NULL,
+ bin_sectalign,
+ null_segbase,
+ bin_directive,
+ bin_cleanup,
+ NULL /* pragma list */
+};
+
+#endif /* #ifdef OF_BIN */