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Linux kernel mirror (for testing)
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kernel
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linux
1#ifndef _ASM_POWERPC_FTRACE
2#define _ASM_POWERPC_FTRACE
3
4#ifdef CONFIG_FUNCTION_TRACER
5#define MCOUNT_ADDR ((unsigned long)(_mcount))
6#define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */
7
8#ifdef __ASSEMBLY__
9
10/* Based off of objdump optput from glibc */
11
12#define MCOUNT_SAVE_FRAME \
13 stwu r1,-48(r1); \
14 stw r3, 12(r1); \
15 stw r4, 16(r1); \
16 stw r5, 20(r1); \
17 stw r6, 24(r1); \
18 mflr r3; \
19 lwz r4, 52(r1); \
20 mfcr r5; \
21 stw r7, 28(r1); \
22 stw r8, 32(r1); \
23 stw r9, 36(r1); \
24 stw r10,40(r1); \
25 stw r3, 44(r1); \
26 stw r5, 8(r1)
27
28#define MCOUNT_RESTORE_FRAME \
29 lwz r6, 8(r1); \
30 lwz r0, 44(r1); \
31 lwz r3, 12(r1); \
32 mtctr r0; \
33 lwz r4, 16(r1); \
34 mtcr r6; \
35 lwz r5, 20(r1); \
36 lwz r6, 24(r1); \
37 lwz r0, 52(r1); \
38 lwz r7, 28(r1); \
39 lwz r8, 32(r1); \
40 mtlr r0; \
41 lwz r9, 36(r1); \
42 lwz r10,40(r1); \
43 addi r1, r1, 48
44
45#else /* !__ASSEMBLY__ */
46extern void _mcount(void);
47
48#ifdef CONFIG_DYNAMIC_FTRACE
49# define FTRACE_ADDR ((unsigned long)ftrace_caller)
50# define FTRACE_REGS_ADDR FTRACE_ADDR
51static inline unsigned long ftrace_call_adjust(unsigned long addr)
52{
53 /* reloction of mcount call site is the same as the address */
54 return addr;
55}
56
57struct dyn_arch_ftrace {
58 struct module *mod;
59};
60#endif /* CONFIG_DYNAMIC_FTRACE */
61#endif /* __ASSEMBLY__ */
62
63#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
64#define ARCH_SUPPORTS_FTRACE_OPS 1
65#endif
66#endif
67
68#if defined(CONFIG_FTRACE_SYSCALLS) && defined(CONFIG_PPC64) && !defined(__ASSEMBLY__)
69#if !defined(_CALL_ELF) || _CALL_ELF != 2
70#define ARCH_HAS_SYSCALL_MATCH_SYM_NAME
71static inline bool arch_syscall_match_sym_name(const char *sym, const char *name)
72{
73 /*
74 * Compare the symbol name with the system call name. Skip the .sys or .SyS
75 * prefix from the symbol name and the sys prefix from the system call name and
76 * just match the rest. This is only needed on ppc64 since symbol names on
77 * 32bit do not start with a period so the generic function will work.
78 */
79 return !strcmp(sym + 4, name + 3);
80}
81#endif
82#endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_PPC64 && !__ASSEMBLY__ */
83
84#endif /* _ASM_POWERPC_FTRACE */