diff options
| author | Denys Vlasenko <dvlasenk@redhat.com> | 2015-02-27 01:40:36 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-03-05 00:50:52 +0300 |
| commit | 911d2bb5ccaab102abbab2bb58438c75bc342ca9 (patch) | |
| tree | 7a2e7045c1a312e4ed2a22eacc7790c70f65309b /arch/x86/include/asm/calling.h | |
| parent | 14f6e9532dda399a7b789f744dc045f8865a9e42 (diff) | |
| download | linux-911d2bb5ccaab102abbab2bb58438c75bc342ca9.tar.xz | |
x86/asm/entry/64: Use more readable constants
Constants such as SS+8 or SS+8-RIP are mysterious.
In most cases, SS+8 is just meant to be SIZEOF_PTREGS,
SS+8-RIP is RIP's offset in the iret frame.
This patch changes some of these constants to be less
mysterious.
No code changes (verified with objdump).
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Drewry <wad@chromium.org>
Link: http://lkml.kernel.org/r/1d20491384773bd606e23a382fac23ddb49b5178.1424989793.git.luto@amacapital.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/calling.h')
| -rw-r--r-- | arch/x86/include/asm/calling.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/calling.h b/arch/x86/include/asm/calling.h index 4a7ceb9789a5..337423590b08 100644 --- a/arch/x86/include/asm/calling.h +++ b/arch/x86/include/asm/calling.h @@ -88,6 +88,8 @@ For 32-bit we have the following conventions - kernel is built with #define RSP 19*8 #define SS 20*8 +#define SIZEOF_PTREGS 21*8 + .macro ALLOC_PT_GPREGS_ON_STACK addskip=0 subq $15*8+\addskip, %rsp CFI_ADJUST_CFA_OFFSET 15*8+\addskip |