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f7515d9fe8
Reduce the amount of header sync churn by splitting the shared objtool.h types into a new file. Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/dec622720851210ceafa12d4f4c5f9e73c832152.1677683419.git.jpoimboe@kernel.org
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_OBJTOOL_TYPES_H
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#define _LINUX_OBJTOOL_TYPES_H
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#ifndef __ASSEMBLY__
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#include <linux/types.h>
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/*
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* This struct is used by asm and inline asm code to manually annotate the
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* location of registers on the stack.
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*/
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struct unwind_hint {
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u32 ip;
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s16 sp_offset;
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u8 sp_reg;
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u8 type;
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u8 signal;
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u8 end;
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};
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#endif /* __ASSEMBLY__ */
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/*
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* UNWIND_HINT_TYPE_CALL: Indicates that sp_reg+sp_offset resolves to PREV_SP
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* (the caller's SP right before it made the call). Used for all callable
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* functions, i.e. all C code and all callable asm functions.
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*
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* UNWIND_HINT_TYPE_REGS: Used in entry code to indicate that sp_reg+sp_offset
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* points to a fully populated pt_regs from a syscall, interrupt, or exception.
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*
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* UNWIND_HINT_TYPE_REGS_PARTIAL: Used in entry code to indicate that
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* sp_reg+sp_offset points to the iret return frame.
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*
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* UNWIND_HINT_FUNC: Generate the unwind metadata of a callable function.
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* Useful for code which doesn't have an ELF function annotation.
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*
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* UNWIND_HINT_ENTRY: machine entry without stack, SYSCALL/SYSENTER etc.
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*/
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#define UNWIND_HINT_TYPE_CALL 0
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#define UNWIND_HINT_TYPE_REGS 1
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#define UNWIND_HINT_TYPE_REGS_PARTIAL 2
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#define UNWIND_HINT_TYPE_FUNC 3
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#define UNWIND_HINT_TYPE_ENTRY 4
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#define UNWIND_HINT_TYPE_SAVE 5
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#define UNWIND_HINT_TYPE_RESTORE 6
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#endif /* _LINUX_OBJTOOL_TYPES_H */
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