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- From 842c390469e2c2e10b5aa36700324cd3bde25875 Mon Sep 17 00:00:00 2001
- From: "H.J. Lu" <hjl.tools@gmail.com>
- Date: Sat, 17 Feb 2018 06:47:28 -0800
- Subject: [PATCH] x86-64: Treat R_X86_64_PLT32 as R_X86_64_PC32
- Starting from binutils commit bd7ab16b4537788ad53521c45469a1bdae84ad4a:
- https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=bd7ab16b4537788ad53521c45469a1bdae84ad4a
- x86-64 assembler generates R_X86_64_PLT32, instead of R_X86_64_PC32, for
- 32-bit PC-relative branches. Grub2 should treat R_X86_64_PLT32 as
- R_X86_64_PC32.
- Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
- Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
- Signed-off-by: Romain Naour <romain.naour@smile.fr>
- ---
- grub-core/efiemu/i386/loadcore64.c | 1 +
- grub-core/kern/x86_64/dl.c | 1 +
- util/grub-mkimagexx.c | 1 +
- util/grub-module-verifier.c | 1 +
- 4 files changed, 4 insertions(+)
- diff --git a/grub-core/efiemu/i386/loadcore64.c b/grub-core/efiemu/i386/loadcore64.c
- index e49d0b6..18facf4 100644
- --- a/grub-core/efiemu/i386/loadcore64.c
- +++ b/grub-core/efiemu/i386/loadcore64.c
- @@ -98,6 +98,7 @@ grub_arch_efiemu_relocate_symbols64 (grub_efiemu_segment_t segs,
- break;
-
- case R_X86_64_PC32:
- + case R_X86_64_PLT32:
- err = grub_efiemu_write_value (addr,
- *addr32 + rel->r_addend
- + sym.off
- diff --git a/grub-core/kern/x86_64/dl.c b/grub-core/kern/x86_64/dl.c
- index 4406906..3a73e6e 100644
- --- a/grub-core/kern/x86_64/dl.c
- +++ b/grub-core/kern/x86_64/dl.c
- @@ -70,6 +70,7 @@ grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr,
- break;
-
- case R_X86_64_PC32:
- + case R_X86_64_PLT32:
- {
- grub_int64_t value;
- value = ((grub_int32_t) *addr32) + rel->r_addend + sym->st_value -
- diff --git a/util/grub-mkimagexx.c b/util/grub-mkimagexx.c
- index a2bb054..39d7efb 100644
- --- a/util/grub-mkimagexx.c
- +++ b/util/grub-mkimagexx.c
- @@ -841,6 +841,7 @@ SUFFIX (relocate_addresses) (Elf_Ehdr *e, Elf_Shdr *sections,
- break;
-
- case R_X86_64_PC32:
- + case R_X86_64_PLT32:
- {
- grub_uint32_t *t32 = (grub_uint32_t *) target;
- *t32 = grub_host_to_target64 (grub_target_to_host32 (*t32)
- diff --git a/util/grub-module-verifier.c b/util/grub-module-verifier.c
- index 9179285..a79271f 100644
- --- a/util/grub-module-verifier.c
- +++ b/util/grub-module-verifier.c
- @@ -19,6 +19,7 @@ struct grub_module_verifier_arch archs[] = {
- -1
- }, (int[]){
- R_X86_64_PC32,
- + R_X86_64_PLT32,
- -1
- }
- },
- --
- 2.7.4
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