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42398caf16
While the GCC and Clang compilers already define __ASSEMBLER__ automatically when compiling assembler code, __ASSEMBLY__ is a macro that only gets defined by the Makefiles in the kernel. This is bad since macros starting with two underscores are names that are reserved by the C language. It can also be very confusing for the developers when switching between userspace and kernelspace coding, or when dealing with uapi headers that rather should use __ASSEMBLER__ instead. So let's now standardize on the __ASSEMBLER__ macro that is provided by the compilers. This is a completely mechanical patch (done with a simple "sed -i" statement), with some manual fixups done later while rebasing the patch. Signed-off-by: Thomas Huth <thuth@redhat.com> Acked-by: Heiko Carstens <hca@linux.ibm.com> Link: https://lore.kernel.org/r/20250611140046.137739-3-thuth@redhat.com Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
166 lines
4.3 KiB
C
166 lines
4.3 KiB
C
/* 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 ARCH_SUPPORTS_FTRACE_OPS 1
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#define MCOUNT_INSN_SIZE 6
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#ifndef __ASSEMBLER__
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#include <asm/stacktrace.h>
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static __always_inline unsigned long return_address(unsigned int n)
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{
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struct stack_frame *sf;
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if (!n)
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return (unsigned long)__builtin_return_address(0);
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sf = (struct stack_frame *)current_frame_address();
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do {
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sf = (struct stack_frame *)sf->back_chain;
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if (!sf)
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return 0;
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} while (--n);
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return sf->gprs[8];
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}
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#define ftrace_return_address(n) return_address(n)
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void ftrace_caller(void);
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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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struct ftrace_ops;
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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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#define ftrace_get_symaddr(fentry_ip) ((unsigned long)(fentry_ip))
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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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struct pt_regs *regs = &arch_ftrace_regs(fregs)->regs;
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if (test_pt_regs_flag(regs, PIF_FTRACE_FULL_REGS))
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return regs;
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return 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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arch_ftrace_regs(fregs)->regs.psw.addr = ip;
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}
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#undef ftrace_regs_get_frame_pointer
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static __always_inline unsigned long
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ftrace_regs_get_frame_pointer(struct ftrace_regs *fregs)
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{
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return ftrace_regs_get_stack_pointer(fregs);
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}
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static __always_inline unsigned long
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ftrace_regs_get_return_address(const struct ftrace_regs *fregs)
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{
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return arch_ftrace_regs(fregs)->regs.gprs[14];
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}
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#define arch_ftrace_fill_perf_regs(fregs, _regs) do { \
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(_regs)->psw.mask = 0; \
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(_regs)->psw.addr = arch_ftrace_regs(fregs)->regs.psw.addr; \
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(_regs)->gprs[15] = arch_ftrace_regs(fregs)->regs.gprs[15]; \
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} while (0)
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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
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* also set by a register_ftrace_direct() call, it needs to be
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* differentiated in the ftrace_caller trampoline. To do this,
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* place the direct caller in the ORIG_GPR2 part of pt_regs. This
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* tells the 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_gpr2 = addr;
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}
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#endif /* CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS */
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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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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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#define ftrace_graph_func ftrace_graph_func
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#endif /* __ASSEMBLER__ */
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#ifdef CONFIG_FUNCTION_TRACER
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#define FTRACE_NOP_INSN .word 0xc004, 0x0000, 0x0000 /* brcl 0,0 */
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#ifndef CC_USING_HOTPATCH
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#define FTRACE_GEN_MCOUNT_RECORD(name) \
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.section __mcount_loc, "a", @progbits; \
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.quad name; \
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.previous;
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#else /* !CC_USING_HOTPATCH */
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#define FTRACE_GEN_MCOUNT_RECORD(name)
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#endif /* !CC_USING_HOTPATCH */
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#define FTRACE_GEN_NOP_ASM(name) \
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FTRACE_GEN_MCOUNT_RECORD(name) \
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FTRACE_NOP_INSN
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#else /* CONFIG_FUNCTION_TRACER */
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#define FTRACE_GEN_NOP_ASM(name)
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#endif /* CONFIG_FUNCTION_TRACER */
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#endif /* _ASM_S390_FTRACE_H */
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