Release 4.18 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;
}

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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));
}
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#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));
}
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#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;
}

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static inline void this_cpu_enable_ftrace(void)
{
	get_paca()->ftrace_enabled = 1;
}
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#else /* CONFIG_PPC64 */


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

#endif /* _ASM_POWERPC_FTRACE */
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Directory: arch/powerpc/include/asm

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