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-rw-r--r--scripts/mod/modpost.c16
-rw-r--r--scripts/mod/modpost.h27
2 files changed, 14 insertions, 29 deletions
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index cd104af..413c536 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -420,11 +420,10 @@ static int parse_elf(struct elf_info *info, const char *filename)
return 0;
}
- if (hdr->e_shnum == 0) {
+ if (hdr->e_shnum == SHN_UNDEF) {
/*
* There are more than 64k sections,
* read count from .sh_size.
- * note: it doesn't need shndx2secindex()
*/
info->num_sections = TO_NATIVE(sechdrs[0].sh_size);
}
@@ -432,8 +431,7 @@ static int parse_elf(struct elf_info *info, const char *filename)
info->num_sections = hdr->e_shnum;
}
if (hdr->e_shstrndx == SHN_XINDEX) {
- info->secindex_strings =
- shndx2secindex(TO_NATIVE(sechdrs[0].sh_link));
+ info->secindex_strings = TO_NATIVE(sechdrs[0].sh_link);
}
else {
info->secindex_strings = hdr->e_shstrndx;
@@ -489,7 +487,7 @@ static int parse_elf(struct elf_info *info, const char *filename)
sechdrs[i].sh_offset;
info->symtab_stop = (void *)hdr +
sechdrs[i].sh_offset + sechdrs[i].sh_size;
- sh_link_idx = shndx2secindex(sechdrs[i].sh_link);
+ sh_link_idx = sechdrs[i].sh_link;
info->strtab = (void *)hdr +
sechdrs[sh_link_idx].sh_offset;
}
@@ -516,11 +514,9 @@ static int parse_elf(struct elf_info *info, const char *filename)
if (symtab_shndx_idx != ~0U) {
Elf32_Word *p;
- if (symtab_idx !=
- shndx2secindex(sechdrs[symtab_shndx_idx].sh_link))
+ if (symtab_idx != sechdrs[symtab_shndx_idx].sh_link)
fatal("%s: SYMTAB_SHNDX has bad sh_link: %u!=%u\n",
- filename,
- shndx2secindex(sechdrs[symtab_shndx_idx].sh_link),
+ filename, sechdrs[symtab_shndx_idx].sh_link,
symtab_idx);
/* Fix endianness */
for (p = info->symtab_shndx_start; p < info->symtab_shndx_stop;
@@ -1446,7 +1442,7 @@ static unsigned int *reloc_location(struct elf_info *elf,
Elf_Shdr *sechdr, Elf_Rela *r)
{
Elf_Shdr *sechdrs = elf->sechdrs;
- int section = shndx2secindex(sechdr->sh_info);
+ int section = sechdr->sh_info;
return (void *)elf->hdr + sechdrs[section].sh_offset +
r->r_offset;
diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h
index 0388cfcc..2031119 100644
--- a/scripts/mod/modpost.h
+++ b/scripts/mod/modpost.h
@@ -145,33 +145,22 @@ static inline int is_shndx_special(unsigned int i)
return i != SHN_XINDEX && i >= SHN_LORESERVE && i <= SHN_HIRESERVE;
}
-/* shndx is in [0..SHN_LORESERVE) U (SHN_HIRESERVE, 0xfffffff], thus:
- * shndx == 0 <=> sechdrs[0]
- * ......
- * shndx == SHN_LORESERVE-1 <=> sechdrs[SHN_LORESERVE-1]
- * shndx == SHN_HIRESERVE+1 <=> sechdrs[SHN_LORESERVE]
- * shndx == SHN_HIRESERVE+2 <=> sechdrs[SHN_LORESERVE+1]
- * ......
- * fyi: sym->st_shndx is uint16, SHN_LORESERVE = ff00, SHN_HIRESERVE = ffff,
- * so basically we map 0000..feff -> 0000..feff
- * ff00..ffff -> (you are a bad boy, dont do it)
- * 10000..xxxx -> ff00..(xxxx-0x100)
+/*
+ * Move reserved section indices SHN_LORESERVE..SHN_HIRESERVE out of
+ * the way to -256..-1, to avoid conflicting with real section
+ * indices.
*/
-static inline unsigned int shndx2secindex(unsigned int i)
-{
- if (i <= SHN_HIRESERVE)
- return i;
- return i - (SHN_HIRESERVE + 1 - SHN_LORESERVE);
-}
+#define SPECIAL(i) ((i) - (SHN_HIRESERVE + 1))
/* Accessor for sym->st_shndx, hides ugliness of "64k sections" */
static inline unsigned int get_secindex(const struct elf_info *info,
const Elf_Sym *sym)
{
+ if (is_shndx_special(sym->st_shndx))
+ return SPECIAL(sym->st_shndx);
if (sym->st_shndx != SHN_XINDEX)
return sym->st_shndx;
- return shndx2secindex(info->symtab_shndx_start[sym -
- info->symtab_start]);
+ return info->symtab_shndx_start[sym - info->symtab_start];
}
/* file2alias.c */
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