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https://gitee.com/bianbu-linux/linux-6.6
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ffb1b4a410
Add a 'signal' field which allows unwind hints to specify whether the instruction pointer should be taken literally (like for most interrupts and exceptions) rather than decremented (like for call stack return addresses) when used to find the next ORC entry. Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/d2c5ec4d83a45b513d8fd72fab59f1a8cfa46871.1676068346.git.jpoimboe@kernel.org
74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
#ifndef _ASM_X86_UNWIND_HINTS_H
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#define _ASM_X86_UNWIND_HINTS_H
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#include <linux/objtool.h>
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#include "orc_types.h"
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#ifdef __ASSEMBLY__
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.macro UNWIND_HINT_EMPTY
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UNWIND_HINT type=UNWIND_HINT_TYPE_CALL end=1
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.endm
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.macro UNWIND_HINT_ENTRY
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UNWIND_HINT type=UNWIND_HINT_TYPE_ENTRY end=1
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.endm
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.macro UNWIND_HINT_REGS base=%rsp offset=0 indirect=0 extra=1 partial=0 signal=1
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.if \base == %rsp
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.if \indirect
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.set sp_reg, ORC_REG_SP_INDIRECT
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.else
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.set sp_reg, ORC_REG_SP
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.endif
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.elseif \base == %rbp
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.set sp_reg, ORC_REG_BP
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.elseif \base == %rdi
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.set sp_reg, ORC_REG_DI
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.elseif \base == %rdx
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.set sp_reg, ORC_REG_DX
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.elseif \base == %r10
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.set sp_reg, ORC_REG_R10
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.else
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.error "UNWIND_HINT_REGS: bad base register"
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.endif
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.set sp_offset, \offset
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.if \partial
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.set type, UNWIND_HINT_TYPE_REGS_PARTIAL
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.elseif \extra == 0
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.set type, UNWIND_HINT_TYPE_REGS_PARTIAL
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.set sp_offset, \offset + (16*8)
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.else
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.set type, UNWIND_HINT_TYPE_REGS
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.endif
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UNWIND_HINT sp_reg=sp_reg sp_offset=sp_offset type=type signal=\signal
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.endm
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.macro UNWIND_HINT_IRET_REGS base=%rsp offset=0 signal=1
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UNWIND_HINT_REGS base=\base offset=\offset partial=1 signal=\signal
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.endm
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.macro UNWIND_HINT_FUNC
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UNWIND_HINT sp_reg=ORC_REG_SP sp_offset=8 type=UNWIND_HINT_TYPE_FUNC
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.endm
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.macro UNWIND_HINT_SAVE
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UNWIND_HINT type=UNWIND_HINT_TYPE_SAVE
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.endm
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.macro UNWIND_HINT_RESTORE
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UNWIND_HINT type=UNWIND_HINT_TYPE_RESTORE
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.endm
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#else
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#define UNWIND_HINT_FUNC \
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UNWIND_HINT(ORC_REG_SP, 8, UNWIND_HINT_TYPE_FUNC, 0, 0)
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_X86_UNWIND_HINTS_H */
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