claude is gud

1 files changed, 122 insertions, 0 deletions

diff --git a/vere/ext/nasm/output/legacy.c b/vere/ext/nasm/output/legacy.c
new file mode 100644
index 0000000..15d22e9
--- /dev/null
+++ b/vere/ext/nasm/output/legacy.c
@@ -0,0 +1,122 @@
+/* ----------------------------------------------------------------------- *
+ *
+ *   Copyright 2016-2022 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.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * output/legacy.c
+ *
+ * Mangle a struct out_data to match the rather bizarre legacy
+ * backend interface.
+ *
+ * The "data" parameter for the output function points to a "int64_t",
+ * containing the address of the target in question, unless the type is
+ * OUT_RAWDATA, in which case it points to an "uint8_t"
+ * array.
+ *
+ * Exceptions are OUT_RELxADR, which denote an x-byte relocation
+ * which will be a relative jump. For this we need to know the
+ * distance in bytes from the start of the relocated record until
+ * the end of the containing instruction. _This_ is what is stored
+ * in the size part of the parameter, in this case.
+ *
+ * Also OUT_RESERVE denotes reservation of N bytes of BSS space,
+ * and the contents of the "data" parameter is irrelevant.
+ */
+
+#include "nasm.h"
+#include "outlib.h"
+
+void nasm_do_legacy_output(const struct out_data *data)
+{
+    const void *dptr = data->data;
+    enum out_type type = data->type;
+    int32_t tsegment = data->tsegment;
+    int32_t twrt = data->twrt;
+    uint64_t size = data->size;
+
+    switch (data->type) {
+    case OUT_RELADDR:
+        switch (data->size) {
+        case 1:
+            type = OUT_REL1ADR;
+            break;
+        case 2:
+            type = OUT_REL2ADR;
+            break;
+        case 4:
+            type = OUT_REL4ADR;
+            break;
+        case 8:
+            type = OUT_REL8ADR;
+            break;
+        default:
+            panic();
+            break;
+        }
+
+        dptr = &data->toffset;
+        size = data->relbase - data->offset;
+        break;
+
+    case OUT_SEGMENT:
+        type = OUT_ADDRESS;
+        tsegment |= 1;
+        /* fall through */
+
+    case OUT_ADDRESS:
+        dptr = &data->toffset;
+        size = (data->flags & OUT_SIGNED) ? -data->size : data->size;
+        break;
+
+    case OUT_RAWDATA:
+    case OUT_RESERVE:
+        tsegment = twrt = NO_SEG;
+        break;
+
+    case OUT_ZERODATA:
+        tsegment = twrt = NO_SEG;
+        type = OUT_RAWDATA;
+        dptr = zero_buffer;
+        while (size > ZERO_BUF_SIZE) {
+            ofmt->legacy_output(data->segment, dptr, type,
+                                ZERO_BUF_SIZE, tsegment, twrt);
+            size -= ZERO_BUF_SIZE;
+        }
+        break;
+
+    default:
+        panic();
+        break;
+    }
+
+    ofmt->legacy_output(data->segment, dptr, type, size, tsegment, twrt);
+}