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Merge pull request #378 from jpoimboe/rodata-isra

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support renaming of mangled .rodata sections
This commit is contained in:
Seth Jennings 2014-09-02 11:06:16 -05:00
commit 21c684a794
1 changed files with 21 additions and 1 deletions
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22
kpatch-build/create-diff-object.c
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@ -798,7 +798,8 @@ void kpatch_rename_mangled_functions(struct kpatch_elf *base,
struct kpatch_elf *patched)
{
struct symbol *sym, *basesym;
char *prefix, *dot;
char *prefix, *dot, name[256], *origname;
struct section *sec, *basesec;
list_for_each_entry(sym, &patched->symbols, list) {
if (sym->type != STT_FUNC)
@ -824,6 +825,7 @@ void kpatch_rename_mangled_functions(struct kpatch_elf *base,
continue;
log_debug("renaming %s to %s\n", sym->name, basesym->name);
origname = sym->name;
sym->name = strdup(basesym->name);
if (sym != sym->sec->sym)
@ -832,6 +834,24 @@ void kpatch_rename_mangled_functions(struct kpatch_elf *base,
sym->sec->name = strdup(basesym->sec->name);
if (sym->sec->rela)
sym->sec->rela->name = strdup(basesym->sec->rela->name);
/*
* When function foo.isra.1 has a switch statement, it might
* have a corresponding bundled .rodata.foo.isra.1 section (in
* addition to .text.foo.isra.1 which we renamed above).
*/
sprintf(name, ".rodata.%s", origname);
sec = find_section_by_name(&patched->sections, name);
if (!sec)
continue;
sprintf(name, ".rodata.%s", basesym->name);
basesec = find_section_by_name(&base->sections, name);
if (!basesec)
continue;
sec->name = strdup(basesec->name);
sec->secsym->name = sec->name;
if (sec->rela)
sec->rela->name = strdup(basesec->rela->name);
}
}