1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _ASM_X86_FTRACE_H
 3#define _ASM_X86_FTRACE_H
 4
 5#ifdef CONFIG_FUNCTION_TRACER
 6#ifdef CC_USING_FENTRY
 7# define MCOUNT_ADDR		((unsigned long)(__fentry__))
 8#else
 9# define MCOUNT_ADDR		((unsigned long)(mcount))
10# define HAVE_FUNCTION_GRAPH_FP_TEST
11#endif
12#define MCOUNT_INSN_SIZE	5 /* sizeof mcount call */
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
13
14#ifdef CONFIG_DYNAMIC_FTRACE
15#define ARCH_SUPPORTS_FTRACE_OPS 1
16#endif
17
18#define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
 
 
19
20#ifndef __ASSEMBLY__
21extern void mcount(void);
22extern atomic_t modifying_ftrace_code;
23extern void __fentry__(void);
24
25static inline unsigned long ftrace_call_adjust(unsigned long addr)
26{
27	/*
28	 * addr is the address of the mcount call instruction.
29	 * recordmcount does the necessary offset calculation.
30	 */
31	return addr;
32}
33
34#ifdef CONFIG_DYNAMIC_FTRACE
35
36struct dyn_arch_ftrace {
37	/* No extra data needed for x86 */
38};
39
40int ftrace_int3_handler(struct pt_regs *regs);
41
42#define FTRACE_GRAPH_TRAMP_ADDR FTRACE_GRAPH_ADDR
43
44#endif /*  CONFIG_DYNAMIC_FTRACE */
45#endif /* __ASSEMBLY__ */
46#endif /* CONFIG_FUNCTION_TRACER */
47
48
49#ifndef __ASSEMBLY__
50
51#define ARCH_HAS_SYSCALL_MATCH_SYM_NAME
52static inline bool arch_syscall_match_sym_name(const char *sym, const char *name)
53{
54	/*
55	 * Compare the symbol name with the system call name. Skip the
56	 * "__x64_sys", "__ia32_sys" or simple "sys" prefix.
57	 */
58	return !strcmp(sym + 3, name + 3) ||
59		(!strncmp(sym, "__x64_", 6) && !strcmp(sym + 9, name + 3)) ||
60		(!strncmp(sym, "__ia32_", 7) && !strcmp(sym + 10, name + 3));
61}
62
63#ifndef COMPILE_OFFSETS
64
65#if defined(CONFIG_FTRACE_SYSCALLS) && defined(CONFIG_IA32_EMULATION)
66#include <asm/compat.h>
67
68/*
69 * Because ia32 syscalls do not map to x86_64 syscall numbers
70 * this screws up the trace output when tracing a ia32 task.
71 * Instead of reporting bogus syscalls, just do not trace them.
72 *
73 * If the user really wants these, then they should use the
74 * raw syscall tracepoints with filtering.
75 */
76#define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS 1
77static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs)
78{
79	if (in_compat_syscall())
80		return true;
81	return false;
82}
83#endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_IA32_EMULATION */
84#endif /* !COMPILE_OFFSETS */
85#endif /* !__ASSEMBLY__ */
86
87#endif /* _ASM_X86_FTRACE_H */

 
 1#ifndef _ASM_X86_FTRACE_H
 2#define _ASM_X86_FTRACE_H
 3
 4#ifdef __ASSEMBLY__
 5
 6	.macro MCOUNT_SAVE_FRAME
 7	/* taken from glibc */
 8	subq $0x38, %rsp
 9	movq %rax, (%rsp)
10	movq %rcx, 8(%rsp)
11	movq %rdx, 16(%rsp)
12	movq %rsi, 24(%rsp)
13	movq %rdi, 32(%rsp)
14	movq %r8, 40(%rsp)
15	movq %r9, 48(%rsp)
16	.endm
17
18	.macro MCOUNT_RESTORE_FRAME
19	movq 48(%rsp), %r9
20	movq 40(%rsp), %r8
21	movq 32(%rsp), %rdi
22	movq 24(%rsp), %rsi
23	movq 16(%rsp), %rdx
24	movq 8(%rsp), %rcx
25	movq (%rsp), %rax
26	addq $0x38, %rsp
27	.endm
28
 
 
29#endif
30
31#ifdef CONFIG_FUNCTION_TRACER
32#define MCOUNT_ADDR		((long)(mcount))
33#define MCOUNT_INSN_SIZE	5 /* sizeof mcount call */
34
35#ifndef __ASSEMBLY__
36extern void mcount(void);
 
 
37
38static inline unsigned long ftrace_call_adjust(unsigned long addr)
39{
40	/*
41	 * addr is the address of the mcount call instruction.
42	 * recordmcount does the necessary offset calculation.
43	 */
44	return addr;
45}
46
47#ifdef CONFIG_DYNAMIC_FTRACE
48
49struct dyn_arch_ftrace {
50	/* No extra data needed for x86 */
51};
52
 
 
 
 
53#endif /*  CONFIG_DYNAMIC_FTRACE */
54#endif /* __ASSEMBLY__ */
55#endif /* CONFIG_FUNCTION_TRACER */
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
56
57#endif /* _ASM_X86_FTRACE_H */