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