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| author | Ingo Molnar <mingo@kernel.org> | 2015-06-08 06:33:56 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-06-08 06:47:46 (GMT) |
| commit | 4c8cd0c50d0b1559727bf0ec7ff27caeba2dfe09 (patch) | |
| tree | bd477ba39b3ee39b9f6ecf64bfc74a602fa27d60 /arch/x86/entry/entry_32.S | |
| parent | 2cd23553b488589f287457b7396470f5e3c40698 (diff) | |
| download | linux-4c8cd0c50d0b1559727bf0ec7ff27caeba2dfe09.tar.xz | |
x86/asm/entry: Untangle 'ia32_sysenter_target' into two entry points: entry_SYSENTER_32 and entry_SYSENTER_compat
So the SYSENTER instruction is pretty quirky and it has different behavior
depending on bitness and CPU maker.
Yet we create a false sense of coherency by naming it 'ia32_sysenter_target'
in both of the cases.
Split the name into its two uses:
ia32_sysenter_target (32) -> entry_SYSENTER_32
ia32_sysenter_target (64) -> entry_SYSENTER_compat
As per the generic naming scheme for x86 system call entry points:
entry_MNEMONIC_qualifier
where 'qualifier' is one of _32, _64 or _compat.
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/entry/entry_32.S')
| -rw-r--r-- | arch/x86/entry/entry_32.S | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S index 0ac73de..a65f46c 100644 --- a/arch/x86/entry/entry_32.S +++ b/arch/x86/entry/entry_32.S @@ -307,7 +307,7 @@ END(resume_kernel) the vsyscall page. See vsyscall-sysentry.S, which defines the symbol. */ # sysenter call handler stub -ENTRY(ia32_sysenter_target) +ENTRY(entry_SYSENTER_32) movl TSS_sysenter_sp0(%esp),%esp sysenter_past_esp: /* @@ -412,7 +412,7 @@ sysexit_audit: .popsection _ASM_EXTABLE(1b,2b) PTGS_TO_GS_EX -ENDPROC(ia32_sysenter_target) +ENDPROC(entry_SYSENTER_32) # system call handler stub ENTRY(system_call) @@ -1135,7 +1135,7 @@ END(page_fault) ENTRY(debug) ASM_CLAC - cmpl $ia32_sysenter_target,(%esp) + cmpl $entry_SYSENTER_32,(%esp) jne debug_stack_correct FIX_STACK 12, debug_stack_correct, debug_esp_fix_insn debug_stack_correct: @@ -1165,7 +1165,7 @@ ENTRY(nmi) popl %eax je nmi_espfix_stack #endif - cmpl $ia32_sysenter_target,(%esp) + cmpl $entry_SYSENTER_32,(%esp) je nmi_stack_fixup pushl %eax movl %esp,%eax @@ -1176,7 +1176,7 @@ ENTRY(nmi) cmpl $(THREAD_SIZE-20),%eax popl %eax jae nmi_stack_correct - cmpl $ia32_sysenter_target,12(%esp) + cmpl $entry_SYSENTER_32,12(%esp) je nmi_debug_stack_check nmi_stack_correct: pushl %eax |