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powerpc64/module elfv1: Set opd addresses after module relocation

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module_frob_arch_sections() is called before the module is moved to its
final location. The function descriptor section addresses we are setting
here are thus invalid. Fix this by processing opd section during
module_finalize()

Fixes: 5633e85b2c313 ("powerpc64: Add .opd based function descriptor dereference")
Cc: stable@vger.kernel.org # v4.16
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Naveen N. Rao 2018-05-29 12:21:00 +05:30 committed by Michael Ellerman
parent 7cd01b08d3
commit 59fe7eaf35
2 changed files with 8 additions and 5 deletions
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8
arch/powerpc/kernel/module.c
View File

@ -74,6 +74,14 @@ int module_finalize(const Elf_Ehdr *hdr,
(void *)sect->sh_addr + sect->sh_size);
#endif /* CONFIG_PPC64 */
#ifdef PPC64_ELF_ABI_v1
sect = find_section(hdr, sechdrs, ".opd");
if (sect != NULL) {
me->arch.start_opd = sect->sh_addr;
me->arch.end_opd = sect->sh_addr + sect->sh_size;
}
#endif /* PPC64_ELF_ABI_v1 */
#ifdef CONFIG_PPC_BARRIER_NOSPEC
sect = find_section(hdr, sechdrs, "__spec_barrier_fixup");
if (sect != NULL)

5
arch/powerpc/kernel/module_64.c
View File

@ -360,11 +360,6 @@ int module_frob_arch_sections(Elf64_Ehdr *hdr,
else if (strcmp(secstrings+sechdrs[i].sh_name,"__versions")==0)
dedotify_versions((void *)hdr + sechdrs[i].sh_offset,
sechdrs[i].sh_size);
else if (!strcmp(secstrings + sechdrs[i].sh_name, ".opd")) {
me->arch.start_opd = sechdrs[i].sh_addr;
me->arch.end_opd = sechdrs[i].sh_addr +
sechdrs[i].sh_size;
}
/* We don't handle .init for the moment: rename to _init */
while ((p = strstr(secstrings + sechdrs[i].sh_name, ".init")))