diff options
Diffstat (limited to 'arch/x86/include/asm/ftrace.h')
-rw-r--r-- | arch/x86/include/asm/ftrace.h | 56 |
1 files changed, 36 insertions, 20 deletions
diff --git a/arch/x86/include/asm/ftrace.h b/arch/x86/include/asm/ftrace.h index b0767bc0874..9a25b522d37 100644 --- a/arch/x86/include/asm/ftrace.h +++ b/arch/x86/include/asm/ftrace.h | |||
@@ -3,38 +3,54 @@ | |||
3 | 3 | ||
4 | #ifdef __ASSEMBLY__ | 4 | #ifdef __ASSEMBLY__ |
5 | 5 | ||
6 | .macro MCOUNT_SAVE_FRAME | 6 | /* skip is set if the stack was already partially adjusted */ |
7 | /* taken from glibc */ | 7 | .macro MCOUNT_SAVE_FRAME skip=0 |
8 | subq $0x38, %rsp | 8 | /* |
9 | movq %rax, (%rsp) | 9 | * We add enough stack to save all regs. |
10 | movq %rcx, 8(%rsp) | 10 | */ |
11 | movq %rdx, 16(%rsp) | 11 | subq $(SS+8-\skip), %rsp |
12 | movq %rsi, 24(%rsp) | 12 | movq %rax, RAX(%rsp) |
13 | movq %rdi, 32(%rsp) | 13 | movq %rcx, RCX(%rsp) |
14 | movq %r8, 40(%rsp) | 14 | movq %rdx, RDX(%rsp) |
15 | movq %r9, 48(%rsp) | 15 | movq %rsi, RSI(%rsp) |
16 | movq %rdi, RDI(%rsp) | ||
17 | movq %r8, R8(%rsp) | ||
18 | movq %r9, R9(%rsp) | ||
19 | /* Move RIP to its proper location */ | ||
20 | movq SS+8(%rsp), %rdx | ||
21 | movq %rdx, RIP(%rsp) | ||
16 | .endm | 22 | .endm |
17 | 23 | ||
18 | .macro MCOUNT_RESTORE_FRAME | 24 | .macro MCOUNT_RESTORE_FRAME skip=0 |
19 | movq 48(%rsp), %r9 | 25 | movq R9(%rsp), %r9 |
20 | movq 40(%rsp), %r8 | 26 | movq R8(%rsp), %r8 |
21 | movq 32(%rsp), %rdi | 27 | movq RDI(%rsp), %rdi |
22 | movq 24(%rsp), %rsi | 28 | movq RSI(%rsp), %rsi |
23 | movq 16(%rsp), %rdx | 29 | movq RDX(%rsp), %rdx |
24 | movq 8(%rsp), %rcx | 30 | movq RCX(%rsp), %rcx |
25 | movq (%rsp), %rax | 31 | movq RAX(%rsp), %rax |
26 | addq $0x38, %rsp | 32 | addq $(SS+8-\skip), %rsp |
27 | .endm | 33 | .endm |
28 | 34 | ||
29 | #endif | 35 | #endif |
30 | 36 | ||
31 | #ifdef CONFIG_FUNCTION_TRACER | 37 | #ifdef CONFIG_FUNCTION_TRACER |
32 | #define MCOUNT_ADDR ((long)(mcount)) | 38 | #ifdef CC_USING_FENTRY |
39 | # define MCOUNT_ADDR ((long)(__fentry__)) | ||
40 | #else | ||
41 | # define MCOUNT_ADDR ((long)(mcount)) | ||
42 | #endif | ||
33 | #define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */ | 43 | #define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */ |
34 | 44 | ||
45 | #ifdef CONFIG_DYNAMIC_FTRACE | ||
46 | #define ARCH_SUPPORTS_FTRACE_OPS 1 | ||
47 | #define ARCH_SUPPORTS_FTRACE_SAVE_REGS | ||
48 | #endif | ||
49 | |||
35 | #ifndef __ASSEMBLY__ | 50 | #ifndef __ASSEMBLY__ |
36 | extern void mcount(void); | 51 | extern void mcount(void); |
37 | extern atomic_t modifying_ftrace_code; | 52 | extern atomic_t modifying_ftrace_code; |
53 | extern void __fentry__(void); | ||
38 | 54 | ||
39 | static inline unsigned long ftrace_call_adjust(unsigned long addr) | 55 | static inline unsigned long ftrace_call_adjust(unsigned long addr) |
40 | { | 56 | { |