/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_FTRACE
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#define _ASM_POWERPC_FTRACE
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#include <asm/types.h>
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#ifdef CONFIG_FUNCTION_TRACER
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#define MCOUNT_ADDR ((unsigned long)(_mcount))
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#define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */
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#define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
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#ifdef __ASSEMBLY__
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/* Based off of objdump optput from glibc */
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#define MCOUNT_SAVE_FRAME \
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stwu r1,-48(r1); \
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stw r3, 12(r1); \
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stw r4, 16(r1); \
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stw r5, 20(r1); \
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stw r6, 24(r1); \
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mflr r3; \
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lwz r4, 52(r1); \
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mfcr r5; \
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stw r7, 28(r1); \
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stw r8, 32(r1); \
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stw r9, 36(r1); \
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stw r10,40(r1); \
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stw r3, 44(r1); \
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stw r5, 8(r1)
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#define MCOUNT_RESTORE_FRAME \
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lwz r6, 8(r1); \
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lwz r0, 44(r1); \
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lwz r3, 12(r1); \
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mtctr r0; \
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lwz r4, 16(r1); \
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mtcr r6; \
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lwz r5, 20(r1); \
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lwz r6, 24(r1); \
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lwz r0, 52(r1); \
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lwz r7, 28(r1); \
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lwz r8, 32(r1); \
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mtlr r0; \
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lwz r9, 36(r1); \
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lwz r10,40(r1); \
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addi r1, r1, 48
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#else /* !__ASSEMBLY__ */
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extern void _mcount(void);
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static inline unsigned long ftrace_call_adjust(unsigned long addr)
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{
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/* reloction of mcount call site is the same as the address */
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return addr;
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}
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struct dyn_arch_ftrace {
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struct module *mod;
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};
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#endif /* __ASSEMBLY__ */
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#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
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#define ARCH_SUPPORTS_FTRACE_OPS 1
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#endif
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#endif /* CONFIG_FUNCTION_TRACER */
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#ifndef __ASSEMBLY__
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#ifdef CONFIG_FTRACE_SYSCALLS
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/*
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* Some syscall entry functions on powerpc start with "ppc_" (fork and clone,
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* for instance) or ppc32_/ppc64_. We should also match the sys_ variant with
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* those.
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*/
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#define ARCH_HAS_SYSCALL_MATCH_SYM_NAME
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#ifdef PPC64_ELF_ABI_v1
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static inline bool arch_syscall_match_sym_name(const char *sym, const char *name)
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{
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/* We need to skip past the initial dot, and the __se_sys alias */
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return !strcmp(sym + 1, name) ||
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(!strncmp(sym, ".__se_sys", 9) && !strcmp(sym + 6, name)) ||
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(!strncmp(sym, ".ppc_", 5) && !strcmp(sym + 5, name + 4)) ||
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(!strncmp(sym, ".ppc32_", 7) && !strcmp(sym + 7, name + 4)) ||
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(!strncmp(sym, ".ppc64_", 7) && !strcmp(sym + 7, name + 4));
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}
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#else
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static inline bool arch_syscall_match_sym_name(const char *sym, const char *name)
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{
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return !strcmp(sym, name) ||
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(!strncmp(sym, "__se_sys", 8) && !strcmp(sym + 5, name)) ||
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(!strncmp(sym, "ppc_", 4) && !strcmp(sym + 4, name + 4)) ||
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(!strncmp(sym, "ppc32_", 6) && !strcmp(sym + 6, name + 4)) ||
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(!strncmp(sym, "ppc64_", 6) && !strcmp(sym + 6, name + 4));
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}
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#endif /* PPC64_ELF_ABI_v1 */
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#endif /* CONFIG_FTRACE_SYSCALLS */
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#if defined(CONFIG_PPC64) && defined(CONFIG_FUNCTION_TRACER)
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#include <asm/paca.h>
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static inline void this_cpu_disable_ftrace(void)
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{
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get_paca()->ftrace_enabled = 0;
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}
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static inline void this_cpu_enable_ftrace(void)
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{
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get_paca()->ftrace_enabled = 1;
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}
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/* Disable ftrace on this CPU if possible (may not be implemented) */
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static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled)
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{
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get_paca()->ftrace_enabled = ftrace_enabled;
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}
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static inline u8 this_cpu_get_ftrace_enabled(void)
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{
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return get_paca()->ftrace_enabled;
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}
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void ftrace_free_init_tramp(void);
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#else /* CONFIG_PPC64 */
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static inline void this_cpu_disable_ftrace(void) { }
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static inline void this_cpu_enable_ftrace(void) { }
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static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled) { }
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static inline u8 this_cpu_get_ftrace_enabled(void) { return 1; }
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static inline void ftrace_free_init_tramp(void) { }
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#endif /* CONFIG_PPC64 */
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#endif /* !__ASSEMBLY__ */
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#endif /* _ASM_POWERPC_FTRACE */
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