diff options
| author | Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> | 2012-09-05 23:31:00 +0900 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2012-09-13 22:52:09 -0400 |
| commit | a5e37863ab31d78faddff15675c89979792bc0bd (patch) | |
| tree | 419d5be632de58394bf726b59fe3475f06c3502d | |
| parent | ea632e9f12033346cc68247faa3b924d54936b8b (diff) | |
| download | linux-yinghai-a5e37863ab31d78faddff15675c89979792bc0bd.tar.gz | |
ftrace/x86: Adjust x86 regs.ip as like as x86-64
Adjust x86 regs.ip to ip + MCOUNT_INSN_SIZE as like as
on x86-64. This helps us to consolidate codes which use
regs->ip on both of x86/x86-64.
Link: http://lkml.kernel.org/r/20120905143100.10329.60109.stgit@localhost.localdomain
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| -rw-r--r-- | arch/x86/kernel/entry_32.S | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S index 061ac17ee974a..f438a44bf8f9c 100644 --- a/arch/x86/kernel/entry_32.S +++ b/arch/x86/kernel/entry_32.S @@ -1148,7 +1148,6 @@ ENTRY(ftrace_regs_caller) * ip location, and move flags into the return ip location. */ pushl 4(%esp) /* save return ip into ip slot */ - subl $MCOUNT_INSN_SIZE, (%esp) /* Adjust ip */ pushl $0 /* Load 0 into orig_ax */ pushl %gs @@ -1169,6 +1168,7 @@ ENTRY(ftrace_regs_caller) movl $__KERNEL_CS,13*4(%esp) movl 12*4(%esp), %eax /* Load ip (1st parameter) */ + subl $MCOUNT_INSN_SIZE, %eax /* Adjust ip */ movl 0x4(%ebp), %edx /* Load parent ip (2nd parameter) */ leal function_trace_op, %ecx /* Save ftrace_pos in 3rd parameter */ pushl %esp /* Save pt_regs as 4th parameter */ @@ -1180,7 +1180,6 @@ GLOBAL(ftrace_regs_call) movl 14*4(%esp), %eax /* Move flags back into cs */ movl %eax, 13*4(%esp) /* Needed to keep addl from modifying flags */ movl 12*4(%esp), %eax /* Get return ip from regs->ip */ - addl $MCOUNT_INSN_SIZE, %eax movl %eax, 14*4(%esp) /* Put return ip back for ret */ popl %ebx |