88 lines
2.1 KiB
C
88 lines
2.1 KiB
C
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/* 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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#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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#ifdef CONFIG_DYNAMIC_FTRACE
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# define FTRACE_ADDR ((unsigned long)ftrace_caller)
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# define FTRACE_REGS_ADDR FTRACE_ADDR
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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 /* CONFIG_DYNAMIC_FTRACE */
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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
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#if defined(CONFIG_FTRACE_SYSCALLS) && !defined(__ASSEMBLY__)
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#ifdef PPC64_ELF_ABI_v1
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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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/*
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* Compare the symbol name with the system call name. Skip the .sys or .SyS
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* prefix from the symbol name and the sys prefix from the system call name and
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* just match the rest. This is only needed on ppc64 since symbol names on
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* 32bit do not start with a period so the generic function will work.
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*/
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return !strcmp(sym + 4, name + 3);
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}
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#endif
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#endif /* CONFIG_FTRACE_SYSCALLS && !__ASSEMBLY__ */
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#endif /* _ASM_POWERPC_FTRACE */
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