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review.evervolv.com / android_kernel_oneplus_msm8996 / 3d6ee36dfb2d40c72071f68173f67c728a0e19f3 / . / arch / x86 / include / asm / ftrace.h
blob: 9a25b522d37799adf0b7a00d898ba30cb70b08b7 [file] [log] [blame]
H. Peter Anvin1965aae2008-10-22 22:26:29 -0700[diff] [blame]1#ifndef _ASM_X86_FTRACE_H
2#define _ASM_X86_FTRACE_H
Abhishek Sagar395a59d2008-06-21 23:47:27 +0530[diff] [blame]3
Cyrill Gorcunovd680fe42008-12-13 00:09:08 +0300[diff] [blame]4#ifdef __ASSEMBLY__
5
Steven Rostedt08f6fba2012-04-30 16:20:23 -0400[diff] [blame]6 /* skip is set if the stack was already partially adjusted */
7 .macro MCOUNT_SAVE_FRAME skip=0
8 /*
9 * We add enough stack to save all regs.
10 */
11 subq $(SS+8-\skip), %rsp
12 movq %rax, RAX(%rsp)
13 movq %rcx, RCX(%rsp)
14 movq %rdx, RDX(%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)
Cyrill Gorcunovd680fe42008-12-13 00:09:08 +0300[diff] [blame]22 .endm
23
Steven Rostedt08f6fba2012-04-30 16:20:23 -0400[diff] [blame]24 .macro MCOUNT_RESTORE_FRAME skip=0
25 movq R9(%rsp), %r9
26 movq R8(%rsp), %r8
27 movq RDI(%rsp), %rdi
28 movq RSI(%rsp), %rsi
29 movq RDX(%rsp), %rdx
30 movq RCX(%rsp), %rcx
31 movq RAX(%rsp), %rax
32 addq $(SS+8-\skip), %rsp
Cyrill Gorcunovd680fe42008-12-13 00:09:08 +0300[diff] [blame]33 .endm
34
35#endif
36
Ingo Molnar4944dd62008-10-27 10:50:54 +0100[diff] [blame]37#ifdef CONFIG_FUNCTION_TRACER
Steven Rostedtd57c5d52011-02-09 13:32:18 -0500[diff] [blame]38#ifdef CC_USING_FENTRY
39# define MCOUNT_ADDR ((long)(__fentry__))
40#else
41# define MCOUNT_ADDR ((long)(mcount))
42#endif
Abhishek Sagar395a59d2008-06-21 23:47:27 +0530[diff] [blame]43#define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */
44
Steven Rostedt28fb5df2011-08-10 22:00:55 -0400[diff] [blame]45#ifdef CONFIG_DYNAMIC_FTRACE
Steven Rostedt2f5f6ad2011-08-08 16:57:47 -0400[diff] [blame]46#define ARCH_SUPPORTS_FTRACE_OPS 1
Steven Rostedt08f6fba2012-04-30 16:20:23 -0400[diff] [blame]47#define ARCH_SUPPORTS_FTRACE_SAVE_REGS
48#endif
Steven Rostedt2f5f6ad2011-08-08 16:57:47 -0400[diff] [blame]49
Abhishek Sagar395a59d2008-06-21 23:47:27 +0530[diff] [blame]50#ifndef __ASSEMBLY__
51extern void mcount(void);
Steven Rostedta192cd02012-05-30 13:26:37 -0400[diff] [blame]52extern atomic_t modifying_ftrace_code;
Steven Rostedtd57c5d52011-02-09 13:32:18 -0500[diff] [blame]53extern void __fentry__(void);
Steven Rostedt68bf21a2008-08-14 15:45:08 -0400[diff] [blame]54
55static inline unsigned long ftrace_call_adjust(unsigned long addr)
56{
57 /*
Martin Schwidefsky521ccb52011-05-10 10:10:41 +0200[diff] [blame]58 * addr is the address of the mcount call instruction.
59 * recordmcount does the necessary offset calculation.
Steven Rostedt68bf21a2008-08-14 15:45:08 -0400[diff] [blame]60 */
Martin Schwidefsky521ccb52011-05-10 10:10:41 +0200[diff] [blame]61 return addr;
Steven Rostedt68bf21a2008-08-14 15:45:08 -0400[diff] [blame]62}
Steven Rostedt31e88902008-11-14 16:21:19 -0800[diff] [blame]63
64#ifdef CONFIG_DYNAMIC_FTRACE
65
66struct dyn_arch_ftrace {
67 /* No extra data needed for x86 */
68};
69
Steven Rostedt08d636b2011-08-16 09:57:10 -0400[diff] [blame]70int ftrace_int3_handler(struct pt_regs *regs);
71
Steven Rostedt31e88902008-11-14 16:21:19 -0800[diff] [blame]72#endif /* CONFIG_DYNAMIC_FTRACE */
Steven Rostedta26a2a22008-10-31 00:03:22 -0400[diff] [blame]73#endif /* __ASSEMBLY__ */
Ingo Molnar4944dd62008-10-27 10:50:54 +0100[diff] [blame]74#endif /* CONFIG_FUNCTION_TRACER */
Abhishek Sagar395a59d2008-06-21 23:47:27 +0530[diff] [blame]75
H. Peter Anvin1965aae2008-10-22 22:26:29 -0700[diff] [blame]76#endif /* _ASM_X86_FTRACE_H */