[linux-2.6-block.git] / arch / powerpc / include / asm / ftrace.h

/* 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 */

#ifdef __ASSEMBLY__

/* Based off of objdump optput from glibc */

#define MCOUNT_SAVE_FRAME			\
	stwu	r1,-48(r1);			\
	stw	r3, 12(r1);			\
	stw	r4, 16(r1);			\
	stw	r5, 20(r1);			\
	stw	r6, 24(r1);			\
	mflr	r3;				\
	lwz	r4, 52(r1);			\
	mfcr	r5;				\
	stw	r7, 28(r1);			\
	stw	r8, 32(r1);			\
	stw	r9, 36(r1);			\
	stw	r10,40(r1);			\
	stw	r3, 44(r1);			\
	stw	r5, 8(r1)

#define MCOUNT_RESTORE_FRAME			\
	lwz	r6, 8(r1);			\
	lwz	r0, 44(r1);			\
	lwz	r3, 12(r1);			\
	mtctr	r0;				\
	lwz	r4, 16(r1);			\
	mtcr	r6;				\
	lwz	r5, 20(r1);			\
	lwz	r6, 24(r1);			\
	lwz	r0, 52(r1);			\
	lwz	r7, 28(r1);			\
	lwz	r8, 32(r1);			\
	mtlr	r0;				\
	lwz	r9, 36(r1);			\
	lwz	r10,40(r1);			\
	addi	r1, r1, 48

#else /* !__ASSEMBLY__ */
extern void _mcount(void);

static inline unsigned long ftrace_call_adjust(unsigned long addr)
{
       /* reloction of mcount call site is the same as the address */
       return addr;
}

struct dyn_arch_ftrace {
	struct module *mod;
};
#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
#ifdef PPC64_ELF_ABI_v1
static inline bool arch_syscall_match_sym_name(const char *sym, const char *name)
{
	/* We need to skip past the initial dot, and the __se_sys alias */
	return !strcmp(sym + 1, name) ||
		(!strncmp(sym, ".__se_sys", 9) && !strcmp(sym + 6, name)) ||
		(!strncmp(sym, ".ppc_", 5) && !strcmp(sym + 5, name + 4)) ||
		(!strncmp(sym, ".ppc32_", 7) && !strcmp(sym + 7, name + 4)) ||
		(!strncmp(sym, ".ppc64_", 7) && !strcmp(sym + 7, name + 4));
}
#else
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 /* PPC64_ELF_ABI_v1 */
#endif /* CONFIG_FTRACE_SYSCALLS */

#ifdef CONFIG_PPC64
#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;
}
#else /* CONFIG_PPC64 */
static inline void this_cpu_disable_ftrace(void) { }
static inline void this_cpu_enable_ftrace(void) { }
#endif /* CONFIG_PPC64 */
#endif /* !__ASSEMBLY__ */

#endif /* _ASM_POWERPC_FTRACE */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
ccbfac29 SR	2	#ifndef _ASM_POWERPC_FTRACE
	3	#define _ASM_POWERPC_FTRACE
	4
f55d9665 ME	5	#include <asm/types.h>
f55d9665 ME	6
606576ce	7	#ifdef CONFIG_FUNCTION_TRACER
c93bf928	8	#define MCOUNT_ADDR ((unsigned long)(_mcount))
395a59d0 AS	9	#define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */
395a59d0 AS	10
bf528a3a SR	11	#ifdef __ASSEMBLY__
	12
	13	/* Based off of objdump optput from glibc */
	14
	15	#define MCOUNT_SAVE_FRAME \
	16	stwu r1,-48(r1); \
	17	stw r3, 12(r1); \
	18	stw r4, 16(r1); \
	19	stw r5, 20(r1); \
	20	stw r6, 24(r1); \
	21	mflr r3; \
	22	lwz r4, 52(r1); \
	23	mfcr r5; \
	24	stw r7, 28(r1); \
	25	stw r8, 32(r1); \
	26	stw r9, 36(r1); \
	27	stw r10,40(r1); \
	28	stw r3, 44(r1); \
	29	stw r5, 8(r1)
	30
	31	#define MCOUNT_RESTORE_FRAME \
	32	lwz r6, 8(r1); \
	33	lwz r0, 44(r1); \
	34	lwz r3, 12(r1); \
	35	mtctr r0; \
	36	lwz r4, 16(r1); \
	37	mtcr r6; \
	38	lwz r5, 20(r1); \
	39	lwz r6, 24(r1); \
	40	lwz r0, 52(r1); \
	41	lwz r7, 28(r1); \
	42	lwz r8, 32(r1); \
	43	mtlr r0; \
	44	lwz r9, 36(r1); \
	45	lwz r10,40(r1); \
	46	addi r1, r1, 48
	47
	48	#else /* !__ASSEMBLY__ */
ccbfac29	49	extern void _mcount(void);
8fd6e5a8	50
8fd6e5a8 SR	51	static inline unsigned long ftrace_call_adjust(unsigned long addr)
	52	{
	53	/* reloction of mcount call site is the same as the address */
	54	return addr;
	55	}
	56
	57	struct dyn_arch_ftrace {
f48cb8b4	58	struct module *mod;
8fd6e5a8	59	};
8fd6e5a8	60	#endif /* __ASSEMBLY__ */
ccbfac29	61
15308664 TD	62	#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
	63	#define ARCH_SUPPORTS_FTRACE_OPS 1
	64	#endif
0c0c5230	65	#endif /* CONFIG_FUNCTION_TRACER */
395a59d0	66
c3e59d77	67	#ifndef __ASSEMBLY__
f1079d3a	68	#ifdef CONFIG_FTRACE_SYSCALLS
edf6a2df NR	69	/*
	70	* Some syscall entry functions on powerpc start with "ppc_" (fork and clone,
	71	* for instance) or ppc32_/ppc64_. We should also match the sys_ variant with
	72	* those.
	73	*/
02424d89	74	#define ARCH_HAS_SYSCALL_MATCH_SYM_NAME
edf6a2df	75	#ifdef PPC64_ELF_ABI_v1
02424d89 IM	76	static inline bool arch_syscall_match_sym_name(const char sym, const char name)
02424d89 IM	77	{
0b7758aa NR	78	/* We need to skip past the initial dot, and the __se_sys alias */
0b7758aa NR	79	return !strcmp(sym + 1, name) \|\|
edf6a2df NR	80	(!strncmp(sym, ".__se_sys", 9) && !strcmp(sym + 6, name)) \|\|
	81	(!strncmp(sym, ".ppc_", 5) && !strcmp(sym + 5, name + 4)) \|\|
	82	(!strncmp(sym, ".ppc32_", 7) && !strcmp(sym + 7, name + 4)) \|\|
	83	(!strncmp(sym, ".ppc64_", 7) && !strcmp(sym + 7, name + 4));
02424d89	84	}
edf6a2df NR	85	#else
	86	static inline bool arch_syscall_match_sym_name(const char sym, const char name)
	87	{
	88	return !strcmp(sym, name) \|\|
	89	(!strncmp(sym, "__se_sys", 8) && !strcmp(sym + 5, name)) \|\|
	90	(!strncmp(sym, "ppc_", 4) && !strcmp(sym + 4, name + 4)) \|\|
	91	(!strncmp(sym, "ppc32_", 6) && !strcmp(sym + 6, name + 4)) \|\|
	92	(!strncmp(sym, "ppc64_", 6) && !strcmp(sym + 6, name + 4));
02424d89	93	}
f1079d3a ME	94	#endif /* PPC64_ELF_ABI_v1 */
f1079d3a ME	95	#endif /* CONFIG_FTRACE_SYSCALLS */
acd55b10 NR	96
	97	#ifdef CONFIG_PPC64
	98	#include <asm/paca.h>
	99
	100	static inline void this_cpu_disable_ftrace(void)
	101	{
	102	get_paca()->ftrace_enabled = 0;
	103	}
	104
	105	static inline void this_cpu_enable_ftrace(void)
	106	{
	107	get_paca()->ftrace_enabled = 1;
	108	}
	109	#else /* CONFIG_PPC64 */
	110	static inline void this_cpu_disable_ftrace(void) { }
	111	static inline void this_cpu_enable_ftrace(void) { }
	112	#endif /* CONFIG_PPC64 */
c3e59d77	113	#endif /* !__ASSEMBLY__ */
02424d89	114
395a59d0	115	#endif /* _ASM_POWERPC_FTRACE */