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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1965aae3 PA |
2 | #ifndef _ASM_X86_FTRACE_H |
3 | #define _ASM_X86_FTRACE_H | |
395a59d0 | 4 | |
606576ce | 5 | #ifdef CONFIG_FUNCTION_TRACER |
562e14f7 SRV |
6 | #ifndef CC_USING_FENTRY |
7 | # error Compiler does not support fentry? | |
d57c5d51 | 8 | #endif |
562e14f7 | 9 | # define MCOUNT_ADDR ((unsigned long)(__fentry__)) |
395a59d0 AS |
10 | #define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */ |
11 | ||
28fb5dfa | 12 | #ifdef CONFIG_DYNAMIC_FTRACE |
2f5f6ad9 | 13 | #define ARCH_SUPPORTS_FTRACE_OPS 1 |
08f6fba5 | 14 | #endif |
2f5f6ad9 | 15 | |
471bd10f JP |
16 | #define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR |
17 | ||
395a59d0 | 18 | #ifndef __ASSEMBLY__ |
a192cd04 | 19 | extern atomic_t modifying_ftrace_code; |
d57c5d51 | 20 | extern void __fentry__(void); |
68bf21aa SR |
21 | |
22 | static inline unsigned long ftrace_call_adjust(unsigned long addr) | |
23 | { | |
24 | /* | |
521ccb5c MS |
25 | * addr is the address of the mcount call instruction. |
26 | * recordmcount does the necessary offset calculation. | |
68bf21aa | 27 | */ |
521ccb5c | 28 | return addr; |
68bf21aa | 29 | } |
31e88909 | 30 | |
562955fe SRV |
31 | /* |
32 | * When a ftrace registered caller is tracing a function that is | |
33 | * also set by a register_ftrace_direct() call, it needs to be | |
34 | * differentiated in the ftrace_caller trampoline. To do this, we | |
35 | * place the direct caller in the ORIG_AX part of pt_regs. This | |
36 | * tells the ftrace_caller that there's a direct caller. | |
37 | */ | |
38 | static inline void arch_ftrace_set_direct_caller(struct pt_regs *regs, unsigned long addr) | |
39 | { | |
40 | /* Emulate a call */ | |
41 | regs->orig_ax = addr; | |
42 | } | |
43 | ||
31e88909 SR |
44 | #ifdef CONFIG_DYNAMIC_FTRACE |
45 | ||
46 | struct dyn_arch_ftrace { | |
47 | /* No extra data needed for x86 */ | |
48 | }; | |
49 | ||
1026ff9b SRRH |
50 | #define FTRACE_GRAPH_TRAMP_ADDR FTRACE_GRAPH_ADDR |
51 | ||
31e88909 | 52 | #endif /* CONFIG_DYNAMIC_FTRACE */ |
a26a2a27 | 53 | #endif /* __ASSEMBLY__ */ |
606576ce | 54 | #endif /* CONFIG_FUNCTION_TRACER */ |
395a59d0 | 55 | |
f431b634 | 56 | |
1c758a22 SRV |
57 | #ifndef __ASSEMBLY__ |
58 | ||
59566b0b SRV |
59 | #if defined(CONFIG_FUNCTION_TRACER) && defined(CONFIG_DYNAMIC_FTRACE) |
60 | extern void set_ftrace_ops_ro(void); | |
61 | #else | |
62 | static inline void set_ftrace_ops_ro(void) { } | |
63 | #endif | |
64 | ||
1c758a22 SRV |
65 | #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME |
66 | static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) | |
67 | { | |
68 | /* | |
69 | * Compare the symbol name with the system call name. Skip the | |
fdc63ff0 | 70 | * "__x64_sys", "__ia32_sys", "__do_sys" or simple "sys" prefix. |
1c758a22 SRV |
71 | */ |
72 | return !strcmp(sym + 3, name + 3) || | |
73 | (!strncmp(sym, "__x64_", 6) && !strcmp(sym + 9, name + 3)) || | |
fdc63ff0 KK |
74 | (!strncmp(sym, "__ia32_", 7) && !strcmp(sym + 10, name + 3)) || |
75 | (!strncmp(sym, "__do_sys", 8) && !strcmp(sym + 8, name + 3)); | |
1c758a22 SRV |
76 | } |
77 | ||
78 | #ifndef COMPILE_OFFSETS | |
f431b634 SR |
79 | |
80 | #if defined(CONFIG_FTRACE_SYSCALLS) && defined(CONFIG_IA32_EMULATION) | |
0d55303c | 81 | #include <linux/compat.h> |
f431b634 SR |
82 | |
83 | /* | |
84 | * Because ia32 syscalls do not map to x86_64 syscall numbers | |
85 | * this screws up the trace output when tracing a ia32 task. | |
86 | * Instead of reporting bogus syscalls, just do not trace them. | |
87 | * | |
6a6256f9 | 88 | * If the user really wants these, then they should use the |
f431b634 SR |
89 | * raw syscall tracepoints with filtering. |
90 | */ | |
91 | #define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS 1 | |
92 | static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs) | |
93 | { | |
a846446b | 94 | return in_32bit_syscall(); |
f431b634 SR |
95 | } |
96 | #endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_IA32_EMULATION */ | |
1c758a22 SRV |
97 | #endif /* !COMPILE_OFFSETS */ |
98 | #endif /* !__ASSEMBLY__ */ | |
f431b634 | 99 | |
1965aae3 | 100 | #endif /* _ASM_X86_FTRACE_H */ |