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8e0b986c59
There shouldn't be any 31 bit code around anymore that matters. Remove the compat layer support required to run 31 bit code. Reason for removal is code simplification and reduced test effort. Note that this comes without any deprecation warnings added to config options, or kernel messages, since most likely those would be ignored anyway. If it turns out there is still a reason to keep the compat layer this can be reverted at any time in the future. Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
150 lines
3.7 KiB
C
150 lines
3.7 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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#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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/* Skip the __s390x_ prefix. */
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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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