arch/powerpc/include/asm/ftrace.h

Source file repositories/reference/linux-study-clean/arch/powerpc/include/asm/ftrace.h

File Facts

System
Linux kernel
Corpus path
arch/powerpc/include/asm/ftrace.h
Extension
.h
Size
5646 bytes
Lines
181
Domain
Architecture Layer
Bucket
arch/powerpc
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

struct dyn_arch_ftrace {
#ifdef CONFIG_PPC_FTRACE_OUT_OF_LINE
	/* pointer to the associated out-of-line stub */
	unsigned long ool_stub;
#endif
};

#ifdef CONFIG_DYNAMIC_FTRACE_WITH_ARGS
#define ftrace_need_init_nop()	(true)
int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec);
#define ftrace_init_nop ftrace_init_nop

#include <linux/ftrace_regs.h>

static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *fregs)
{
	/* We clear regs.msr in ftrace_call */
	return arch_ftrace_regs(fregs)->regs.msr ? &arch_ftrace_regs(fregs)->regs : NULL;
}

#define arch_ftrace_fill_perf_regs(fregs, _regs) do {		\
		(_regs)->result = 0;				\
		(_regs)->nip = arch_ftrace_regs(fregs)->regs.nip;		\
		(_regs)->gpr[1] = arch_ftrace_regs(fregs)->regs.gpr[1];		\
		asm volatile("mfmsr %0" : "=r" ((_regs)->msr));	\
	} while (0)

#undef ftrace_regs_get_return_value
static __always_inline unsigned long
ftrace_regs_get_return_value(const struct ftrace_regs *fregs)
{
	return arch_ftrace_regs(fregs)->regs.gpr[3];
}
#define ftrace_regs_get_return_value ftrace_regs_get_return_value

#undef ftrace_regs_get_frame_pointer
static __always_inline unsigned long
ftrace_regs_get_frame_pointer(const struct ftrace_regs *fregs)
{
	return arch_ftrace_regs(fregs)->regs.gpr[1];
}

static __always_inline void
ftrace_regs_set_instruction_pointer(struct ftrace_regs *fregs,
				    unsigned long ip)
{
	regs_set_return_ip(&arch_ftrace_regs(fregs)->regs, ip);
}

static __always_inline unsigned long
ftrace_regs_get_return_address(struct ftrace_regs *fregs)
{
	return arch_ftrace_regs(fregs)->regs.link;
}

struct ftrace_ops;

#define ftrace_graph_func ftrace_graph_func
void ftrace_graph_func(unsigned long ip, unsigned long parent_ip,
		       struct ftrace_ops *op, struct ftrace_regs *fregs);
#endif
#endif /* __ASSEMBLER__ */

#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
#define ARCH_SUPPORTS_FTRACE_OPS 1
#endif
#endif /* CONFIG_FUNCTION_TRACER */

#ifndef __ASSEMBLER__
#ifdef CONFIG_FTRACE_SYSCALLS
/*
 * Some syscall entry functions on powerpc start with "ppc_" (fork and clone,
 * for instance) or ppc32_/ppc64_. We should also match the sys_ variant with
 * those.
 */
#define ARCH_HAS_SYSCALL_MATCH_SYM_NAME
static inline bool arch_syscall_match_sym_name(const char *sym, const char *name)
{
	return !strcmp(sym, name) ||
		(!strncmp(sym, "__se_sys", 8) && !strcmp(sym + 5, name)) ||
		(!strncmp(sym, "ppc_", 4) && !strcmp(sym + 4, name + 4)) ||
		(!strncmp(sym, "ppc32_", 6) && !strcmp(sym + 6, name + 4)) ||
		(!strncmp(sym, "ppc64_", 6) && !strcmp(sym + 6, name + 4));
}
#endif /* CONFIG_FTRACE_SYSCALLS */

#if defined(CONFIG_PPC64) && defined(CONFIG_FUNCTION_TRACER)
#include <asm/paca.h>

static inline void this_cpu_disable_ftrace(void)

Annotation

Implementation Notes