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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: "H.J. Lu" <hjl.tools@gmail.com>
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Date: Sat, 17 Feb 2018 06:47:28 -0800
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Subject: [PATCH] x86-64: Treat R_X86_64_PLT32 as R_X86_64_PC32
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Starting from binutils commit bd7ab16b4537788ad53521c45469a1bdae84ad4a:
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https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=bd7ab16b4537788ad53521c45469a1bdae84ad4a
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x86-64 assembler generates R_X86_64_PLT32, instead of R_X86_64_PC32, for
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32-bit PC-relative branches. Grub2 should treat R_X86_64_PLT32 as
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R_X86_64_PC32.
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Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
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Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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---
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grub-core/efiemu/i386/loadcore64.c | 1 +
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grub-core/kern/x86_64/dl.c | 1 +
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util/grub-mkimagexx.c | 1 +
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util/grub-module-verifier.c | 1 +
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4 files changed, 4 insertions(+)
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diff --git a/grub-core/efiemu/i386/loadcore64.c b/grub-core/efiemu/i386/loadcore64.c
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index e49d0b6ff17..18facf47fd7 100644
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--- a/grub-core/efiemu/i386/loadcore64.c
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+++ b/grub-core/efiemu/i386/loadcore64.c
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@@ -98,6 +98,7 @@ grub_arch_efiemu_relocate_symbols64 (grub_efiemu_segment_t segs,
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break;
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case R_X86_64_PC32:
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+ case R_X86_64_PLT32:
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err = grub_efiemu_write_value (addr,
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*addr32 + rel->r_addend
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+ sym.off
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diff --git a/grub-core/kern/x86_64/dl.c b/grub-core/kern/x86_64/dl.c
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index 44069067312..3a73e6e6ce2 100644
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--- a/grub-core/kern/x86_64/dl.c
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+++ b/grub-core/kern/x86_64/dl.c
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@@ -70,6 +70,7 @@ grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr,
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break;
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case R_X86_64_PC32:
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+ case R_X86_64_PLT32:
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{
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grub_int64_t value;
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value = ((grub_int32_t) *addr32) + rel->r_addend + sym->st_value -
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diff --git a/util/grub-mkimagexx.c b/util/grub-mkimagexx.c
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index a2bb05439f0..39d7efb914a 100644
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--- a/util/grub-mkimagexx.c
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+++ b/util/grub-mkimagexx.c
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@@ -841,6 +841,7 @@ SUFFIX (relocate_addresses) (Elf_Ehdr *e, Elf_Shdr *sections,
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break;
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case R_X86_64_PC32:
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+ case R_X86_64_PLT32:
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{
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grub_uint32_t *t32 = (grub_uint32_t *) target;
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*t32 = grub_host_to_target64 (grub_target_to_host32 (*t32)
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diff --git a/util/grub-module-verifier.c b/util/grub-module-verifier.c
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index 9179285a5ff..a79271f6631 100644
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--- a/util/grub-module-verifier.c
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+++ b/util/grub-module-verifier.c
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@@ -19,6 +19,7 @@ struct grub_module_verifier_arch archs[] = {
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-1
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}, (int[]){
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R_X86_64_PC32,
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+ R_X86_64_PLT32,
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-1
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}
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},
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