Commit-ID: a5e37863ab31d78faddff15675c89979792bc0bd Gitweb: http://git.kernel.org/tip/a5e37863ab31d78faddff15675c89979792bc0bd Author: Masami Hiramatsu <[email protected]> AuthorDate: Wed, 5 Sep 2012 23:31:00 +0900 Committer: Steven Rostedt <[email protected]> CommitDate: Thu, 13 Sep 2012 22:52:09 -0400
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/[email protected] Cc: Peter Zijlstra <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Signed-off-by: Masami Hiramatsu <[email protected]> Signed-off-by: Steven Rostedt <[email protected]> --- 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 061ac17..f438a44 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
