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Subject[PATCH 04/15] x86/ftrace: Add pt_regs frame annotations
When CONFIG_FRAME_POINTER, we should mark pt_regs frames.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
arch/x86/kernel/ftrace_32.S | 3 +++
arch/x86/kernel/ftrace_64.S | 3 +++
2 files changed, 6 insertions(+)

--- a/arch/x86/kernel/ftrace_32.S
+++ b/arch/x86/kernel/ftrace_32.S
@@ -9,6 +9,7 @@
#include <asm/export.h>
#include <asm/ftrace.h>
#include <asm/nospec-branch.h>
+#include <asm/frame.h>

# define function_hook __fentry__
EXPORT_SYMBOL(__fentry__)
@@ -116,6 +117,8 @@ ENTRY(ftrace_regs_caller)
pushl %ecx
pushl %ebx

+ ENCODE_FRAME_POINTER
+
movl 12*4(%esp), %eax /* Load ip (1st parameter) */
subl $MCOUNT_INSN_SIZE, %eax /* Adjust ip */
movl 15*4(%esp), %edx /* Load parent ip (2nd parameter) */
--- a/arch/x86/kernel/ftrace_64.S
+++ b/arch/x86/kernel/ftrace_64.S
@@ -9,6 +9,7 @@
#include <asm/export.h>
#include <asm/nospec-branch.h>
#include <asm/unwind_hints.h>
+#include <asm/frame.h>

.code64
.section .entry.text, "ax"
@@ -203,6 +204,8 @@ GLOBAL(ftrace_regs_caller_op_ptr)
leaq MCOUNT_REG_SIZE+8*2(%rsp), %rcx
movq %rcx, RSP(%rsp)

+ ENCODE_FRAME_POINTER
+
/* regs go into 4th parameter */
leaq (%rsp), %rcx


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