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Diffstat (limited to '')
| -rw-r--r-- | tools/include/linux/objtool.h | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/tools/include/linux/objtool.h b/tools/include/linux/objtool.h deleted file mode 100644 index 577f51436cf9..000000000000 --- a/tools/include/linux/objtool.h +++ /dev/null @@ -1,129 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _LINUX_OBJTOOL_H -#define _LINUX_OBJTOOL_H - -#ifndef __ASSEMBLY__ - -#include <linux/types.h> - -/* - * This struct is used by asm and inline asm code to manually annotate the - * location of registers on the stack. - */ -struct unwind_hint { - u32 ip; - s16 sp_offset; - u8 sp_reg; - u8 type; - u8 end; -}; -#endif - -/* - * UNWIND_HINT_TYPE_CALL: Indicates that sp_reg+sp_offset resolves to PREV_SP - * (the caller's SP right before it made the call). Used for all callable - * functions, i.e. all C code and all callable asm functions. - * - * UNWIND_HINT_TYPE_REGS: Used in entry code to indicate that sp_reg+sp_offset - * points to a fully populated pt_regs from a syscall, interrupt, or exception. - * - * UNWIND_HINT_TYPE_REGS_PARTIAL: Used in entry code to indicate that - * sp_reg+sp_offset points to the iret return frame. - */ -#define UNWIND_HINT_TYPE_CALL 0 -#define UNWIND_HINT_TYPE_REGS 1 -#define UNWIND_HINT_TYPE_REGS_PARTIAL 2 -#define UNWIND_HINT_TYPE_RET_OFFSET 3 - -#ifdef CONFIG_STACK_VALIDATION - -#ifndef __ASSEMBLY__ - -#define UNWIND_HINT(sp_reg, sp_offset, type, end) \ - "987: \n\t" \ - ".pushsection .discard.unwind_hints\n\t" \ - /* struct unwind_hint */ \ - ".long 987b - .\n\t" \ - ".short " __stringify(sp_offset) "\n\t" \ - ".byte " __stringify(sp_reg) "\n\t" \ - ".byte " __stringify(type) "\n\t" \ - ".byte " __stringify(end) "\n\t" \ - ".balign 4 \n\t" \ - ".popsection\n\t" - -/* - * This macro marks the given function's stack frame as "non-standard", which - * tells objtool to ignore the function when doing stack metadata validation. - * It should only be used in special cases where you're 100% sure it won't - * affect the reliability of frame pointers and kernel stack traces. - * - * For more information, see tools/objtool/Documentation/stack-validation.txt. - */ -#define STACK_FRAME_NON_STANDARD(func) \ - static void __used __section(".discard.func_stack_frame_non_standard") \ - *__func_stack_frame_non_standard_##func = func - -#else /* __ASSEMBLY__ */ - -/* - * This macro indicates that the following intra-function call is valid. - * Any non-annotated intra-function call will cause objtool to issue a warning. - */ -#define ANNOTATE_INTRA_FUNCTION_CALL \ - 999: \ - .pushsection .discard.intra_function_calls; \ - .long 999b; \ - .popsection; - -/* - * In asm, there are two kinds of code: normal C-type callable functions and - * the rest. The normal callable functions can be called by other code, and - * don't do anything unusual with the stack. Such normal callable functions - * are annotated with the ENTRY/ENDPROC macros. Most asm code falls in this - * category. In this case, no special debugging annotations are needed because - * objtool can automatically generate the ORC data for the ORC unwinder to read - * at runtime. - * - * Anything which doesn't fall into the above category, such as syscall and - * interrupt handlers, tends to not be called directly by other functions, and - * often does unusual non-C-function-type things with the stack pointer. Such - * code needs to be annotated such that objtool can understand it. The - * following CFI hint macros are for this type of code. - * - * These macros provide hints to objtool about the state of the stack at each - * instruction. Objtool starts from the hints and follows the code flow, - * making automatic CFI adjustments when it sees pushes and pops, filling out - * the debuginfo as necessary. It will also warn if it sees any - * inconsistencies. - */ -.macro UNWIND_HINT sp_reg:req sp_offset=0 type:req end=0 -.Lunwind_hint_ip_\@: - .pushsection .discard.unwind_hints - /* struct unwind_hint */ - .long .Lunwind_hint_ip_\@ - . - .short \sp_offset - .byte \sp_reg - .byte \type - .byte \end - .balign 4 - .popsection -.endm - -#endif /* __ASSEMBLY__ */ - -#else /* !CONFIG_STACK_VALIDATION */ - -#ifndef __ASSEMBLY__ - -#define UNWIND_HINT(sp_reg, sp_offset, type, end) \ - "\n\t" -#define STACK_FRAME_NON_STANDARD(func) -#else -#define ANNOTATE_INTRA_FUNCTION_CALL -.macro UNWIND_HINT sp_reg:req sp_offset=0 type:req end=0 -.endm -#endif - -#endif /* CONFIG_STACK_VALIDATION */ - -#endif /* _LINUX_OBJTOOL_H */ |