Messages in this thread Patch in this message | | | From | Gabriel Krisman Bertazi <> | Subject | [PATCH 4/6] x86: elf: Use e_machine to choose DLINFO in compat | Date | Sat, 12 Sep 2020 03:05:51 -0400 |
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Since TIF_X32 is going away, avoid using it to find the ELF type on ARCH_DLINFO.
According to SysV AMD64 ABI Draft, an AMD64 ELF object using ILP32 must have ELFCLASS32 with (E_MACHINE == EM_X86_64), so use that ELF field to differentiate a x32 object from a IA32 object when loading ARCH_DLINFO in compat mode.
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com> --- arch/x86/include/asm/elf.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/elf.h b/arch/x86/include/asm/elf.h index b9a5d488f1a5..9220efc65d78 100644 --- a/arch/x86/include/asm/elf.h +++ b/arch/x86/include/asm/elf.h @@ -361,7 +361,7 @@ do { \ #define AT_SYSINFO 32 #define COMPAT_ARCH_DLINFO \ -if (test_thread_flag(TIF_X32)) \ +if (exec->e_machine == EM_X86_64) \ ARCH_DLINFO_X32; \ else \ ARCH_DLINFO_IA32 -- 2.28.0
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