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2947a4567f
LLVM moved their issue tracker from their own Bugzilla instance to GitHub issues. While all of the links are still valid, they may not necessarily show the most up to date information around the issues, as all updates will occur on GitHub, not Bugzilla. Another complication is that the Bugzilla issue number is not always the same as the GitHub issue number. Thankfully, LLVM maintains this mapping through two shortlinks: https://llvm.org/bz<num> -> https://bugs.llvm.org/show_bug.cgi?id=<num> https://llvm.org/pr<num> -> https://github.com/llvm/llvm-project/issues/<mapped_num> Switch all "https://bugs.llvm.org/show_bug.cgi?id=<num>" links to the "https://llvm.org/pr<num>" shortlink so that the links show the most up to date information. Each migrated issue links back to the Bugzilla entry, so there should be no loss of fidelity of information here. Link: https://lkml.kernel.org/r/20240109-update-llvm-links-v1-3-eb09b59db071@kernel.org Signed-off-by: Nathan Chancellor <nathan@kernel.org> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Fangrui Song <maskray@google.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Andrii Nakryiko <andrii@kernel.org> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Mykola Lysenko <mykolal@fb.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
169 lines
4.3 KiB
C
169 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 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://llvm.org/pr41424 */
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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 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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struct ftrace_regs {
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struct pt_regs regs;
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};
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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 = &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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#ifdef CONFIG_FUNCTION_GRAPH_TRACER
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struct fgraph_ret_regs {
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unsigned long gpr2;
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unsigned long fp;
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};
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static __always_inline unsigned long fgraph_ret_regs_return_value(struct fgraph_ret_regs *ret_regs)
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{
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return ret_regs->gpr2;
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}
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static __always_inline unsigned long fgraph_ret_regs_frame_pointer(struct fgraph_ret_regs *ret_regs)
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{
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return ret_regs->fp;
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}
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#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
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static __always_inline unsigned long
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ftrace_regs_get_instruction_pointer(const struct ftrace_regs *fregs)
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{
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return fregs->regs.psw.addr;
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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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fregs->regs.psw.addr = ip;
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}
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#define ftrace_regs_get_argument(fregs, n) \
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regs_get_kernel_argument(&(fregs)->regs, n)
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#define ftrace_regs_get_stack_pointer(fregs) \
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kernel_stack_pointer(&(fregs)->regs)
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#define ftrace_regs_return_value(fregs) \
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regs_return_value(&(fregs)->regs)
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#define ftrace_regs_set_return_value(fregs, ret) \
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regs_set_return_value(&(fregs)->regs, ret)
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#define ftrace_override_function_with_return(fregs) \
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override_function_with_return(&(fregs)->regs)
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#define ftrace_regs_query_register_offset(name) \
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regs_query_register_offset(name)
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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 = &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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#endif /* __ASSEMBLY__ */
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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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