summaryrefslogtreecommitdiff
path: root/arch/x86/vdso
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/vdso')
-rw-r--r--arch/x86/vdso/vdso2c.c16
-rw-r--r--arch/x86/vdso/vdso2c.h65
2 files changed, 42 insertions, 39 deletions
diff --git a/arch/x86/vdso/vdso2c.c b/arch/x86/vdso/vdso2c.c
index de19ced6c87d..deabaf5bfb89 100644
--- a/arch/x86/vdso/vdso2c.c
+++ b/arch/x86/vdso/vdso2c.c
@@ -54,17 +54,17 @@ static void fail(const char *format, ...)
/*
* Evil macros to do a little-endian read.
*/
-#define __GET_TYPE(x, type, bits, ifnot) \
+#define GLE(x, bits, ifnot) \
__builtin_choose_expr( \
- __builtin_types_compatible_p(typeof(x), type), \
- le##bits##toh((x)), ifnot)
+ (sizeof(x) == bits/8), \
+ (__typeof__(x))le##bits##toh(x), ifnot)
-extern void bad_get(uint64_t);
+extern void bad_get_le(uint64_t);
+#define LAST_LE(x) \
+ __builtin_choose_expr(sizeof(x) == 1, (x), bad_get_le(x))
-#define GET(x) \
- __GET_TYPE((x), __u32, 32, __GET_TYPE((x), __u64, 64, \
- __GET_TYPE((x), __s32, 32, __GET_TYPE((x), __s64, 64, \
- __GET_TYPE((x), __u16, 16, bad_get(x))))))
+#define GET_LE(x) \
+ GLE(x, 64, GLE(x, 32, GLE(x, 16, LAST_LE(x))))
#define NSYMS (sizeof(required_syms) / sizeof(required_syms[0]))
diff --git a/arch/x86/vdso/vdso2c.h b/arch/x86/vdso/vdso2c.h
index f0475dad2286..d1e99e1892c4 100644
--- a/arch/x86/vdso/vdso2c.h
+++ b/arch/x86/vdso/vdso2c.h
@@ -18,27 +18,27 @@ static void GOFUNC(void *addr, size_t len, FILE *outfile, const char *name)
const char *secstrings;
uint64_t syms[NSYMS] = {};
- Elf_Phdr *pt = (Elf_Phdr *)(addr + GET(hdr->e_phoff));
+ Elf_Phdr *pt = (Elf_Phdr *)(addr + GET_LE(hdr->e_phoff));
/* Walk the segment table. */
- for (i = 0; i < GET(hdr->e_phnum); i++) {
- if (GET(pt[i].p_type) == PT_LOAD) {
+ for (i = 0; i < GET_LE(hdr->e_phnum); i++) {
+ if (GET_LE(pt[i].p_type) == PT_LOAD) {
if (found_load)
fail("multiple PT_LOAD segs\n");
- if (GET(pt[i].p_offset) != 0 ||
- GET(pt[i].p_vaddr) != 0)
+ if (GET_LE(pt[i].p_offset) != 0 ||
+ GET_LE(pt[i].p_vaddr) != 0)
fail("PT_LOAD in wrong place\n");
- if (GET(pt[i].p_memsz) != GET(pt[i].p_filesz))
+ if (GET_LE(pt[i].p_memsz) != GET_LE(pt[i].p_filesz))
fail("cannot handle memsz != filesz\n");
- load_size = GET(pt[i].p_memsz);
+ load_size = GET_LE(pt[i].p_memsz);
found_load = 1;
- } else if (GET(pt[i].p_type) == PT_DYNAMIC) {
- dyn = addr + GET(pt[i].p_offset);
- dyn_end = addr + GET(pt[i].p_offset) +
- GET(pt[i].p_memsz);
+ } else if (GET_LE(pt[i].p_type) == PT_DYNAMIC) {
+ dyn = addr + GET_LE(pt[i].p_offset);
+ dyn_end = addr + GET_LE(pt[i].p_offset) +
+ GET_LE(pt[i].p_memsz);
}
}
if (!found_load)
@@ -46,48 +46,51 @@ static void GOFUNC(void *addr, size_t len, FILE *outfile, const char *name)
data_size = (load_size + 4095) / 4096 * 4096;
/* Walk the dynamic table */
- for (i = 0; dyn + i < dyn_end && GET(dyn[i].d_tag) != DT_NULL; i++) {
- typeof(dyn[i].d_tag) tag = GET(dyn[i].d_tag);
+ for (i = 0; dyn + i < dyn_end &&
+ GET_LE(dyn[i].d_tag) != DT_NULL; i++) {
+ typeof(dyn[i].d_tag) tag = GET_LE(dyn[i].d_tag);
if (tag == DT_REL || tag == DT_RELSZ ||
tag == DT_RELENT || tag == DT_TEXTREL)
fail("vdso image contains dynamic relocations\n");
}
/* Walk the section table */
- secstrings_hdr = addr + GET(hdr->e_shoff) +
- GET(hdr->e_shentsize)*GET(hdr->e_shstrndx);
- secstrings = addr + GET(secstrings_hdr->sh_offset);
- for (i = 0; i < GET(hdr->e_shnum); i++) {
- Elf_Shdr *sh = addr + GET(hdr->e_shoff) +
- GET(hdr->e_shentsize) * i;
- if (GET(sh->sh_type) == SHT_SYMTAB)
+ secstrings_hdr = addr + GET_LE(hdr->e_shoff) +
+ GET_LE(hdr->e_shentsize)*GET_LE(hdr->e_shstrndx);
+ secstrings = addr + GET_LE(secstrings_hdr->sh_offset);
+ for (i = 0; i < GET_LE(hdr->e_shnum); i++) {
+ Elf_Shdr *sh = addr + GET_LE(hdr->e_shoff) +
+ GET_LE(hdr->e_shentsize) * i;
+ if (GET_LE(sh->sh_type) == SHT_SYMTAB)
symtab_hdr = sh;
- if (!strcmp(secstrings + GET(sh->sh_name), ".altinstructions"))
+ if (!strcmp(secstrings + GET_LE(sh->sh_name),
+ ".altinstructions"))
alt_sec = sh;
}
if (!symtab_hdr)
fail("no symbol table\n");
- strtab_hdr = addr + GET(hdr->e_shoff) +
- GET(hdr->e_shentsize) * GET(symtab_hdr->sh_link);
+ strtab_hdr = addr + GET_LE(hdr->e_shoff) +
+ GET_LE(hdr->e_shentsize) * GET_LE(symtab_hdr->sh_link);
/* Walk the symbol table */
- for (i = 0; i < GET(symtab_hdr->sh_size) / GET(symtab_hdr->sh_entsize);
+ for (i = 0;
+ i < GET_LE(symtab_hdr->sh_size) / GET_LE(symtab_hdr->sh_entsize);
i++) {
int k;
- Elf_Sym *sym = addr + GET(symtab_hdr->sh_offset) +
- GET(symtab_hdr->sh_entsize) * i;
- const char *name = addr + GET(strtab_hdr->sh_offset) +
- GET(sym->st_name);
+ Elf_Sym *sym = addr + GET_LE(symtab_hdr->sh_offset) +
+ GET_LE(symtab_hdr->sh_entsize) * i;
+ const char *name = addr + GET_LE(strtab_hdr->sh_offset) +
+ GET_LE(sym->st_name);
for (k = 0; k < NSYMS; k++) {
if (!strcmp(name, required_syms[k])) {
if (syms[k]) {
fail("duplicate symbol %s\n",
required_syms[k]);
}
- syms[k] = GET(sym->st_value);
+ syms[k] = GET_LE(sym->st_value);
}
}
}
@@ -147,9 +150,9 @@ static void GOFUNC(void *addr, size_t len, FILE *outfile, const char *name)
fprintf(outfile, "\t},\n");
if (alt_sec) {
fprintf(outfile, "\t.alt = %lu,\n",
- (unsigned long)GET(alt_sec->sh_offset));
+ (unsigned long)GET_LE(alt_sec->sh_offset));
fprintf(outfile, "\t.alt_len = %lu,\n",
- (unsigned long)GET(alt_sec->sh_size));
+ (unsigned long)GET_LE(alt_sec->sh_size));
}
for (i = 0; i < NSYMS; i++) {
if (syms[i])
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-16 11:07:42 +0300