mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-24 14:16:57 +07:00
1026ff9b8e
The function graph trampoline is called from the function trampoline and both do a save and restore of registers. The save of registers done by the function trampoline when only the function graph tracer is running is a waste of CPU cycles. As the function graph tracer trampoline in x86 is dependent from the function trampoline, we can call it directly when a function is only being traced by the function graph trampoline. Acked-by: H. Peter Anvin <hpa@linux.intel.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
102 lines
2.3 KiB
C
102 lines
2.3 KiB
C
#ifndef _ASM_X86_FTRACE_H
|
|
#define _ASM_X86_FTRACE_H
|
|
|
|
#ifdef __ASSEMBLY__
|
|
|
|
/* skip is set if the stack was already partially adjusted */
|
|
.macro MCOUNT_SAVE_FRAME skip=0
|
|
/*
|
|
* We add enough stack to save all regs.
|
|
*/
|
|
subq $(SS+8-\skip), %rsp
|
|
movq %rax, RAX(%rsp)
|
|
movq %rcx, RCX(%rsp)
|
|
movq %rdx, RDX(%rsp)
|
|
movq %rsi, RSI(%rsp)
|
|
movq %rdi, RDI(%rsp)
|
|
movq %r8, R8(%rsp)
|
|
movq %r9, R9(%rsp)
|
|
/* Move RIP to its proper location */
|
|
movq SS+8(%rsp), %rdx
|
|
movq %rdx, RIP(%rsp)
|
|
.endm
|
|
|
|
.macro MCOUNT_RESTORE_FRAME skip=0
|
|
movq R9(%rsp), %r9
|
|
movq R8(%rsp), %r8
|
|
movq RDI(%rsp), %rdi
|
|
movq RSI(%rsp), %rsi
|
|
movq RDX(%rsp), %rdx
|
|
movq RCX(%rsp), %rcx
|
|
movq RAX(%rsp), %rax
|
|
addq $(SS+8-\skip), %rsp
|
|
.endm
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_FUNCTION_TRACER
|
|
#ifdef CC_USING_FENTRY
|
|
# define MCOUNT_ADDR ((long)(__fentry__))
|
|
#else
|
|
# define MCOUNT_ADDR ((long)(mcount))
|
|
#endif
|
|
#define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */
|
|
|
|
#ifdef CONFIG_DYNAMIC_FTRACE
|
|
#define ARCH_SUPPORTS_FTRACE_OPS 1
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLY__
|
|
extern void mcount(void);
|
|
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;
|
|
}
|
|
|
|
#ifdef CONFIG_DYNAMIC_FTRACE
|
|
|
|
struct dyn_arch_ftrace {
|
|
/* No extra data needed for x86 */
|
|
};
|
|
|
|
int ftrace_int3_handler(struct pt_regs *regs);
|
|
|
|
#define FTRACE_GRAPH_TRAMP_ADDR FTRACE_GRAPH_ADDR
|
|
|
|
#endif /* CONFIG_DYNAMIC_FTRACE */
|
|
#endif /* __ASSEMBLY__ */
|
|
#endif /* CONFIG_FUNCTION_TRACER */
|
|
|
|
|
|
#if !defined(__ASSEMBLY__) && !defined(COMPILE_OFFSETS)
|
|
|
|
#if defined(CONFIG_FTRACE_SYSCALLS) && defined(CONFIG_IA32_EMULATION)
|
|
#include <asm/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 realy 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)
|
|
{
|
|
if (is_compat_task())
|
|
return true;
|
|
return false;
|
|
}
|
|
#endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_IA32_EMULATION */
|
|
#endif /* !__ASSEMBLY__ && !COMPILE_OFFSETS */
|
|
|
|
#endif /* _ASM_X86_FTRACE_H */
|