153 lines
4.7 KiB
C
153 lines
4.7 KiB
C
/* 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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/* Ignore unused weak functions which will have larger offsets */
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#if defined(CONFIG_MPROFILE_KERNEL) || defined(CONFIG_ARCH_USING_PATCHABLE_FUNCTION_ENTRY)
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#define FTRACE_MCOUNT_MAX_OFFSET 16
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#elif defined(CONFIG_PPC32)
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#define FTRACE_MCOUNT_MAX_OFFSET 8
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#endif
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#ifndef __ASSEMBLY__
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extern void _mcount(void);
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unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip,
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unsigned long sp);
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struct module;
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struct dyn_ftrace;
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struct dyn_arch_ftrace {
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#ifdef CONFIG_PPC_FTRACE_OUT_OF_LINE
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/* pointer to the associated out-of-line stub */
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unsigned long ool_stub;
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#endif
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};
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#ifdef CONFIG_DYNAMIC_FTRACE_WITH_ARGS
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#define ftrace_need_init_nop() (true)
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int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec);
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#define ftrace_init_nop ftrace_init_nop
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#include <linux/ftrace_regs.h>
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static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *fregs)
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{
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/* We clear regs.msr in ftrace_call */
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return arch_ftrace_regs(fregs)->regs.msr ? &arch_ftrace_regs(fregs)->regs : NULL;
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}
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static __always_inline void
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ftrace_regs_set_instruction_pointer(struct ftrace_regs *fregs,
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unsigned long ip)
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{
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regs_set_return_ip(&arch_ftrace_regs(fregs)->regs, ip);
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}
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struct ftrace_ops;
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#define ftrace_graph_func ftrace_graph_func
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void ftrace_graph_func(unsigned long ip, unsigned long parent_ip,
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struct ftrace_ops *op, struct ftrace_regs *fregs);
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#endif
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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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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 /* 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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#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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#endif /* CONFIG_PPC64 */
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#ifdef CONFIG_FUNCTION_TRACER
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extern unsigned int ftrace_tramp_text[], ftrace_tramp_init[];
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#ifdef CONFIG_PPC_FTRACE_OUT_OF_LINE
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struct ftrace_ool_stub {
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#ifdef CONFIG_DYNAMIC_FTRACE_WITH_CALL_OPS
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struct ftrace_ops *ftrace_op;
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#endif
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u32 insn[4];
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} __aligned(sizeof(unsigned long));
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extern struct ftrace_ool_stub ftrace_ool_stub_text_end[], ftrace_ool_stub_text[],
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ftrace_ool_stub_inittext[];
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extern unsigned int ftrace_ool_stub_text_end_count, ftrace_ool_stub_text_count,
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ftrace_ool_stub_inittext_count;
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#endif
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void ftrace_free_init_tramp(void);
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unsigned long ftrace_call_adjust(unsigned long addr);
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#ifdef CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
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/*
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* When an ftrace registered caller is tracing a function that is also set by a
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* register_ftrace_direct() call, it needs to be differentiated in the
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* ftrace_caller trampoline so that the direct call can be invoked after the
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* other ftrace ops. To do this, place the direct caller in the orig_gpr3 field
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* of pt_regs. This tells ftrace_caller that there's a direct caller.
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*/
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static inline void arch_ftrace_set_direct_caller(struct ftrace_regs *fregs, unsigned long addr)
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{
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struct pt_regs *regs = &arch_ftrace_regs(fregs)->regs;
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regs->orig_gpr3 = addr;
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}
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#endif /* CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS */
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#else
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static inline void ftrace_free_init_tramp(void) { }
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static inline unsigned long ftrace_call_adjust(unsigned long addr) { return addr; }
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#endif
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#endif /* !__ASSEMBLY__ */
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#endif /* _ASM_POWERPC_FTRACE */
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