linux-kernel - [PATCH 12/18] x86 vDSO: ia32_sysenter

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Date:	Mon, 19 Nov 2007 14:06:14 -0800 (PST)
From:	Roland McGrath <roland@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 12/18] x86 vDSO: ia32_sysenter_target


This harmonizes the name for the entry point from the 32-bit sysenter
instruction across 32-bit and 64-bit kernels.

Signed-off-by: Roland McGrath <roland@...hat.com>
---
 arch/x86/kernel/entry_32.S   |   10 +++++-----
 arch/x86/vdso/vdso32-setup.c |    4 ++--
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index dc7f938..388786c 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -283,7 +283,7 @@ END(resume_kernel)
    the vsyscall page.  See vsyscall-sysentry.S, which defines the symbol.  */
 
 	# sysenter call handler stub
-ENTRY(sysenter_entry)
+ENTRY(ia32_sysenter_target)
 	CFI_STARTPROC simple
 	CFI_SIGNAL_FRAME
 	CFI_DEF_CFA esp, 0
@@ -360,7 +360,7 @@ sysenter_past_esp:
 	.align 4
 	.long 1b,2b
 .popsection
-ENDPROC(sysenter_entry)
+ENDPROC(ia32_sysenter_target)
 
 	# system call handler stub
 ENTRY(system_call)
@@ -768,7 +768,7 @@ label:						\
 
 KPROBE_ENTRY(debug)
 	RING0_INT_FRAME
-	cmpl $sysenter_entry,(%esp)
+	cmpl $ia32_sysenter_target,(%esp)
 	jne debug_stack_correct
 	FIX_STACK(12, debug_stack_correct, debug_esp_fix_insn)
 debug_stack_correct:
@@ -799,7 +799,7 @@ KPROBE_ENTRY(nmi)
 	popl %eax
 	CFI_ADJUST_CFA_OFFSET -4
 	je nmi_espfix_stack
-	cmpl $sysenter_entry,(%esp)
+	cmpl $ia32_sysenter_target,(%esp)
 	je nmi_stack_fixup
 	pushl %eax
 	CFI_ADJUST_CFA_OFFSET 4
@@ -812,7 +812,7 @@ KPROBE_ENTRY(nmi)
 	popl %eax
 	CFI_ADJUST_CFA_OFFSET -4
 	jae nmi_stack_correct
-	cmpl $sysenter_entry,12(%esp)
+	cmpl $ia32_sysenter_target,12(%esp)
 	je nmi_debug_stack_check
 nmi_stack_correct:
 	/* We have a RING0_INT_FRAME here */
diff --git a/arch/x86/vdso/vdso32-setup.c b/arch/x86/vdso/vdso32-setup.c
index 85c52d2..fb71a93 100644
--- a/arch/x86/vdso/vdso32-setup.c
+++ b/arch/x86/vdso/vdso32-setup.c
@@ -54,7 +54,7 @@ static int __init vdso_setup(char *s)
 
 __setup("vdso=", vdso_setup);
 
-extern asmlinkage void sysenter_entry(void);
+extern asmlinkage void ia32_sysenter_target(void);
 
 static __init void reloc_symtab(Elf32_Ehdr *ehdr,
 				unsigned offset, unsigned size)
@@ -187,7 +187,7 @@ void enable_sep_cpu(void)
 	tss->x86_tss.esp1 = sizeof(struct tss_struct) + (unsigned long) tss;
 	wrmsr(MSR_IA32_SYSENTER_CS, __KERNEL_CS, 0);
 	wrmsr(MSR_IA32_SYSENTER_ESP, tss->x86_tss.esp1, 0);
-	wrmsr(MSR_IA32_SYSENTER_EIP, (unsigned long) sysenter_entry, 0);
+	wrmsr(MSR_IA32_SYSENTER_EIP, (unsigned long) ia32_sysenter_target, 0);
 	put_cpu();	
 }
 
-
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