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rename changed vmlinux exported functions #658

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rename changed vmlinux exported functions #658

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18 changes: 18 additions & 0 deletions kpatch-build/create-diff-object.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1813,6 +1813,9 @@ static void kpatch_create_patches_sections(struct kpatch_elf *kelf,
struct rela *rela;
struct lookup_result result;
struct kpatch_patch_func *funcs;
int vmlinux, export = 0;

vmlinux = !strcmp(objname, "vmlinux");

/* count patched functions */
nr = 0;
Expand Down Expand Up @@ -1851,6 +1854,9 @@ static void kpatch_create_patches_sections(struct kpatch_elf *kelf,
log_debug("lookup for %s @ 0x%016lx len %lu\n",
sym->name, result.value, result.size);

if (vmlinux && lookup_is_exported_symbol(table, sym->name))
export = 1;

/* add entry in text section */
funcs[index].old_addr = result.value;
funcs[index].old_size = result.size;
Expand Down Expand Up @@ -1891,6 +1897,18 @@ static void kpatch_create_patches_sections(struct kpatch_elf *kelf,
offsetof(struct kpatch_patch_func,objname);

index++;

if (export) {
int len = strlen(sym->name) + strlen(".export") + 1;
char *sym_export = malloc(len);
if (!sym_export)
ERROR("malloc error");
snprintf(sym_export, len, "%s%s", sym->name, ".export");
log_debug("rename changed vmlinux export function: %s to %s\n",
sym->name, sym_export);
sym->name = sym_export;
export = 0;
}
}
}

Expand Down