112 lines
3.0 KiB
C
112 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_POWERPC_FTRACE
|
|
#define _ASM_POWERPC_FTRACE
|
|
|
|
#include <asm/types.h>
|
|
|
|
#ifdef CONFIG_FUNCTION_TRACER
|
|
#define MCOUNT_ADDR ((unsigned long)(_mcount))
|
|
#define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */
|
|
|
|
#define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
|
|
|
|
#ifndef __ASSEMBLY__
|
|
extern void _mcount(void);
|
|
|
|
static inline unsigned long ftrace_call_adjust(unsigned long addr)
|
|
{
|
|
/* relocation of mcount call site is the same as the address */
|
|
return addr;
|
|
}
|
|
|
|
unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip,
|
|
unsigned long sp);
|
|
|
|
struct dyn_arch_ftrace {
|
|
struct module *mod;
|
|
};
|
|
|
|
#ifdef CONFIG_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)
|
|
{
|
|
/* We clear regs.msr in ftrace_call */
|
|
return fregs->regs.msr ? &fregs->regs : NULL;
|
|
}
|
|
|
|
static __always_inline void ftrace_instruction_pointer_set(struct ftrace_regs *fregs,
|
|
unsigned long ip)
|
|
{
|
|
regs_set_return_ip(&fregs->regs, ip);
|
|
}
|
|
|
|
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 /* __ASSEMBLY__ */
|
|
|
|
#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
|
|
#define ARCH_SUPPORTS_FTRACE_OPS 1
|
|
#endif
|
|
#endif /* CONFIG_FUNCTION_TRACER */
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#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)
|
|
{
|
|
get_paca()->ftrace_enabled = 0;
|
|
}
|
|
|
|
static inline void this_cpu_enable_ftrace(void)
|
|
{
|
|
get_paca()->ftrace_enabled = 1;
|
|
}
|
|
|
|
/* Disable ftrace on this CPU if possible (may not be implemented) */
|
|
static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled)
|
|
{
|
|
get_paca()->ftrace_enabled = ftrace_enabled;
|
|
}
|
|
|
|
static inline u8 this_cpu_get_ftrace_enabled(void)
|
|
{
|
|
return get_paca()->ftrace_enabled;
|
|
}
|
|
|
|
void ftrace_free_init_tramp(void);
|
|
#else /* CONFIG_PPC64 */
|
|
static inline void this_cpu_disable_ftrace(void) { }
|
|
static inline void this_cpu_enable_ftrace(void) { }
|
|
static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled) { }
|
|
static inline u8 this_cpu_get_ftrace_enabled(void) { return 1; }
|
|
static inline void ftrace_free_init_tramp(void) { }
|
|
#endif /* CONFIG_PPC64 */
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#endif /* _ASM_POWERPC_FTRACE */
|