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-rw-r--r--outelf.c95
1 files changed, 73 insertions, 22 deletions
diff --git a/outelf.c b/outelf.c
index 6f6c1be..0b77c01 100644
--- a/outelf.c
+++ b/outelf.c
@@ -117,7 +117,7 @@ static struct ELF_SECTDATA {
void *data;
long len;
int is_saa;
-} elf_sects[ELF_MAX_SECTIONS];
+} *elf_sects;
static int elf_nsect;
static long elf_foffs;
@@ -139,7 +139,8 @@ static long elf_gotpc_sect, elf_gotoff_sect;
static long elf_got_sect, elf_plt_sect;
static long elf_sym_sect;
-static void elf_init(FILE *fp, efunc errfunc, ldfunc ldef, evalfunc eval) {
+static void elf_init(FILE *fp, efunc errfunc, ldfunc ldef, evalfunc eval)
+{
elffp = fp;
error = errfunc;
evaluate = eval;
@@ -173,10 +174,13 @@ static void elf_init(FILE *fp, efunc errfunc, ldfunc ldef, evalfunc eval) {
def_seg = seg_alloc();
}
-static void elf_cleanup(void) {
+static void elf_cleanup(int debuginfo)
+{
struct Reloc *r;
int i;
+ (void) debuginfo;
+
elf_write();
fclose (elffp);
for (i=0; i<nsects; i++) {
@@ -196,7 +200,8 @@ static void elf_cleanup(void) {
saa_free (strs);
}
-static void add_sectname (char *firsthalf, char *secondhalf) {
+static void add_sectname (char *firsthalf, char *secondhalf)
+{
int len = strlen(firsthalf)+strlen(secondhalf);
while (shstrtablen + len + 1 > shstrtabsize)
shstrtab = nasm_realloc (shstrtab, (shstrtabsize += SHSTR_DELTA));
@@ -205,7 +210,8 @@ static void add_sectname (char *firsthalf, char *secondhalf) {
shstrtablen += len+1;
}
-static int elf_make_section (char *name, int type, int flags, int align) {
+static int elf_make_section (char *name, int type, int flags, int align)
+{
struct Section *s;
s = nasm_malloc (sizeof(*s));
@@ -235,18 +241,18 @@ static int elf_make_section (char *name, int type, int flags, int align) {
return nsects-1;
}
-static long elf_section_names (char *name, int pass, int *bits) {
+static long elf_section_names (char *name, int pass, int *bits)
+{
char *p;
int flags_and, flags_or, type, align, i;
/*
* Default is 32 bits.
*/
- if (!name)
+ if (!name) {
*bits = 32;
-
- if (!name)
return def_seg;
+ }
p = name;
while (*p && !isspace(*p)) p++;
@@ -334,7 +340,8 @@ static long elf_section_names (char *name, int pass, int *bits) {
}
static void elf_deflabel (char *name, long segment, long offset,
- int is_global, char *special) {
+ int is_global, char *special)
+{
int pos = strslen;
struct Symbol *sym;
int special_used = FALSE;
@@ -439,9 +446,29 @@ static void elf_deflabel (char *name, long segment, long offset,
sym->value = (sym->section == SHN_UNDEF ? 0 : offset);
if (sym->type == SYM_GLOBAL) {
+ /*
+ * There's a problem here that needs fixing.
+ * If sym->section == SHN_ABS, then the first line of the
+ * else section causes 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
+ *
+ * I'm not sure how to procede, because I haven't got the
+ * first clue about how ELF works, so I don't know what to
+ * do with it. Furthermore, I'm not sure what the rest of this
+ * section of code does. Help?
+ *
+ * For now, I'll see if doing absolutely nothing with it will
+ * work...
+ */
if (sym->section == SHN_UNDEF || sym->section == SHN_COMMON)
+ {
bsym = raa_write (bsym, segment, nglobs);
- else {
+ }
+ else if (sym->section != SHN_ABS)
+ {
/*
* This is a global symbol; so we must add it to the linked
* list of global symbols in its section. We'll push it on
@@ -505,7 +532,8 @@ static void elf_deflabel (char *name, long segment, long offset,
}
static void elf_add_reloc (struct Section *sect, long segment,
- int type) {
+ int type)
+{
struct Reloc *r;
r = *sect->tail = nasm_malloc(sizeof(struct Reloc));
@@ -553,7 +581,8 @@ static void elf_add_reloc (struct Section *sect, long segment,
*/
static long elf_add_gsym_reloc (struct Section *sect,
long segment, long offset,
- int type, int exact) {
+ int type, int exact)
+{
struct Reloc *r;
struct Section *s;
struct Symbol *sym, *sm;
@@ -617,7 +646,8 @@ static long elf_add_gsym_reloc (struct Section *sect,
}
static void elf_out (long segto, void *data, unsigned long type,
- long segment, long wrt) {
+ long segment, long wrt)
+{
struct Section *s;
long realbytes = type & OUT_SIZMASK;
long addr;
@@ -744,7 +774,8 @@ static void elf_out (long segto, void *data, unsigned long type,
}
}
-static void elf_write(void) {
+static void elf_write(void)
+{
int nsections, align;
char *p;
int commlen;
@@ -819,6 +850,7 @@ static void elf_write(void) {
align = ((elf_foffs+SEG_ALIGN_1) & ~SEG_ALIGN_1) - elf_foffs;
elf_foffs += align;
elf_nsect = 0;
+ elf_sects = nasm_malloc(sizeof(*elf_sects) * (2 * nsects + 10));
elf_section_header (0, 0, 0, NULL, FALSE, 0L, 0, 0, 0, 0); /* SHN_UNDEF */
p = shstrtab+1;
@@ -853,10 +885,12 @@ static void elf_write(void) {
*/
elf_write_sections();
+ nasm_free (elf_sects);
saa_free (symtab);
}
-static struct SAA *elf_build_symtab (long *len, long *local) {
+static struct SAA *elf_build_symtab (long *len, long *local)
+{
struct SAA *s = saa_init(1L);
struct Symbol *sym;
unsigned char entry[16], *p;
@@ -968,7 +1002,8 @@ static struct SAA *elf_build_reltab (long *len, struct Reloc *r) {
static void elf_section_header (int name, int type, int flags,
void *data, int is_saa, long datalen,
- int link, int info, int align, int eltsize) {
+ int link, int info, int align, int eltsize)
+{
elf_sects[elf_nsect].data = data;
elf_sects[elf_nsect].len = datalen;
elf_sects[elf_nsect].is_saa = is_saa;
@@ -988,7 +1023,8 @@ static void elf_section_header (int name, int type, int flags,
fwritelong ((long)eltsize, elffp);
}
-static void elf_write_sections (void) {
+static void elf_write_sections (void)
+{
int i;
for (i = 0; i < elf_nsect; i++)
if (elf_sects[i].data) {
@@ -1004,34 +1040,49 @@ static void elf_write_sections (void) {
}
static void elf_sect_write (struct Section *sect,
- unsigned char *data, unsigned long len) {
+ unsigned char *data, unsigned long len)
+{
saa_wbytes (sect->data, data, len);
sect->len += len;
}
-static long elf_segbase (long segment) {
+static long elf_segbase (long segment)
+{
return segment;
}
-static int elf_directive (char *directive, char *value, int pass) {
+static int elf_directive (char *directive, char *value, int pass)
+{
return 0;
}
-static void elf_filename (char *inname, char *outname, efunc error) {
+static void elf_filename (char *inname, char *outname, efunc error)
+{
strcpy(elf_module, inname);
standard_extension (inname, outname, ".o", error);
}
static char *elf_stdmac[] = {
"%define __SECT__ [section .text]",
+ "%macro __NASM_CDecl__ 1",
+ "%define $_%1 $%1",
+ "%endmacro",
NULL
};
+static int elf_set_info(enum geninfo type, char **val)
+{
+ return 0;
+}
struct ofmt of_elf = {
"ELF32 (i386) object files (e.g. Linux)",
"elf",
+ NULL,
+ null_debug_arr,
+ &null_debug_form,
elf_stdmac,
elf_init,
+ elf_set_info,
elf_out,
elf_deflabel,
elf_section_names,
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-26 13:31:41 +0000