72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_S390_FTRACE_H
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#define _ASM_S390_FTRACE_H
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#define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
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#define ARCH_SUPPORTS_FTRACE_OPS 1
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#define MCOUNT_INSN_SIZE 6
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#ifndef __ASSEMBLY__
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#ifdef CONFIG_CC_IS_CLANG
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/* https://bugs.llvm.org/show_bug.cgi?id=41424 */
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#define ftrace_return_address(n) 0UL
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#else
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#define ftrace_return_address(n) __builtin_return_address(n)
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#endif
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void ftrace_caller(void);
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extern char ftrace_graph_caller_end;
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extern void *ftrace_func;
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struct dyn_arch_ftrace { };
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#define MCOUNT_ADDR 0
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#define FTRACE_ADDR ((unsigned long)ftrace_caller)
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#define KPROBE_ON_FTRACE_NOP 0
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#define KPROBE_ON_FTRACE_CALL 1
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struct module;
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struct dyn_ftrace;
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bool ftrace_need_init_nop(void);
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#define ftrace_need_init_nop ftrace_need_init_nop
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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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static inline unsigned long ftrace_call_adjust(unsigned long addr)
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{
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return addr;
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}
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/*
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* Even though the system call numbers are identical for s390/s390x a
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* different system call table is used for compat tasks. This may lead
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* to e.g. incorrect or missing trace event sysfs files.
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* Therefore simply do not trace compat system calls at all.
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* See kernel/trace/trace_syscalls.c.
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*/
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#define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS
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static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs)
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{
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return is_compat_task();
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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,
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const char *name)
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{
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/*
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* Skip __s390_ and __s390x_ prefix - due to compat wrappers
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* and aliasing some symbols of 64 bit system call functions
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* may get the __s390_ prefix instead of the __s390x_ prefix.
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*/
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return !strcmp(sym + 7, name) || !strcmp(sym + 8, name);
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}
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_S390_FTRACE_H */
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