mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
118 lines
3.2 KiB
118 lines
3.2 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
#ifndef _ASM_X86_FTRACE_H |
|
#define _ASM_X86_FTRACE_H |
|
|
|
#ifdef CONFIG_FUNCTION_TRACER |
|
#ifndef CC_USING_FENTRY |
|
# error Compiler does not support fentry? |
|
#endif |
|
# define MCOUNT_ADDR ((unsigned long)(__fentry__)) |
|
#define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */ |
|
|
|
#ifdef CONFIG_DYNAMIC_FTRACE |
|
#define ARCH_SUPPORTS_FTRACE_OPS 1 |
|
#endif |
|
|
|
#define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR |
|
|
|
#ifndef __ASSEMBLY__ |
|
extern atomic_t modifying_ftrace_code; |
|
extern void __fentry__(void); |
|
|
|
static inline unsigned long ftrace_call_adjust(unsigned long addr) |
|
{ |
|
/* |
|
* addr is the address of the mcount call instruction. |
|
* recordmcount does the necessary offset calculation. |
|
*/ |
|
return addr; |
|
} |
|
|
|
/* |
|
* When a ftrace registered caller is tracing a function that is |
|
* also set by a register_ftrace_direct() call, it needs to be |
|
* differentiated in the ftrace_caller trampoline. To do this, we |
|
* place the direct caller in the ORIG_AX part of pt_regs. This |
|
* tells the ftrace_caller that there's a direct caller. |
|
*/ |
|
static inline void arch_ftrace_set_direct_caller(struct pt_regs *regs, unsigned long addr) |
|
{ |
|
/* Emulate a call */ |
|
regs->orig_ax = addr; |
|
} |
|
|
|
#ifdef CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS |
|
struct ftrace_regs { |
|
struct pt_regs regs; |
|
}; |
|
|
|
static __always_inline struct pt_regs * |
|
arch_ftrace_get_regs(struct ftrace_regs *fregs) |
|
{ |
|
/* Only when FL_SAVE_REGS is set, cs will be non zero */ |
|
if (!fregs->regs.cs) |
|
return NULL; |
|
return &fregs->regs; |
|
} |
|
|
|
#define ftrace_instruction_pointer_set(fregs, _ip) \ |
|
do { (fregs)->regs.ip = (_ip); } while (0) |
|
#endif |
|
|
|
#ifdef CONFIG_DYNAMIC_FTRACE |
|
|
|
struct dyn_arch_ftrace { |
|
/* No extra data needed for x86 */ |
|
}; |
|
|
|
#define FTRACE_GRAPH_TRAMP_ADDR FTRACE_GRAPH_ADDR |
|
|
|
#endif /* CONFIG_DYNAMIC_FTRACE */ |
|
#endif /* __ASSEMBLY__ */ |
|
#endif /* CONFIG_FUNCTION_TRACER */ |
|
|
|
|
|
#ifndef __ASSEMBLY__ |
|
|
|
#if defined(CONFIG_FUNCTION_TRACER) && defined(CONFIG_DYNAMIC_FTRACE) |
|
extern void set_ftrace_ops_ro(void); |
|
#else |
|
static inline void set_ftrace_ops_ro(void) { } |
|
#endif |
|
|
|
#define ARCH_HAS_SYSCALL_MATCH_SYM_NAME |
|
static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) |
|
{ |
|
/* |
|
* Compare the symbol name with the system call name. Skip the |
|
* "__x64_sys", "__ia32_sys", "__do_sys" or simple "sys" prefix. |
|
*/ |
|
return !strcmp(sym + 3, name + 3) || |
|
(!strncmp(sym, "__x64_", 6) && !strcmp(sym + 9, name + 3)) || |
|
(!strncmp(sym, "__ia32_", 7) && !strcmp(sym + 10, name + 3)) || |
|
(!strncmp(sym, "__do_sys", 8) && !strcmp(sym + 8, name + 3)); |
|
} |
|
|
|
#ifndef COMPILE_OFFSETS |
|
|
|
#if defined(CONFIG_FTRACE_SYSCALLS) && defined(CONFIG_IA32_EMULATION) |
|
#include <linux/compat.h> |
|
|
|
/* |
|
* Because ia32 syscalls do not map to x86_64 syscall numbers |
|
* this screws up the trace output when tracing a ia32 task. |
|
* Instead of reporting bogus syscalls, just do not trace them. |
|
* |
|
* If the user really wants these, then they should use the |
|
* raw syscall tracepoints with filtering. |
|
*/ |
|
#define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS 1 |
|
static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs) |
|
{ |
|
return in_32bit_syscall(); |
|
} |
|
#endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_IA32_EMULATION */ |
|
#endif /* !COMPILE_OFFSETS */ |
|
#endif /* !__ASSEMBLY__ */ |
|
|
|
#endif /* _ASM_X86_FTRACE_H */
|
|
|