67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
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#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 sp_reg=ORC_REG_UNDEFINED type=UNWIND_HINT_TYPE_CALL 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
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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
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.endm
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.macro UNWIND_HINT_IRET_REGS base=%rsp offset=0
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UNWIND_HINT_REGS base=\base offset=\offset partial=1
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.endm
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.macro UNWIND_HINT_FUNC sp_offset=8
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UNWIND_HINT sp_reg=ORC_REG_SP sp_offset=\sp_offset type=UNWIND_HINT_TYPE_CALL
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.endm
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/*
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* RET_OFFSET: Used on instructions that terminate a function; mostly RETURN
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* and sibling calls. On these, sp_offset denotes the expected offset from
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* initial_func_cfi.
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*/
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.macro UNWIND_HINT_RET_OFFSET sp_offset=8
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UNWIND_HINT sp_reg=ORC_REG_SP type=UNWIND_HINT_TYPE_RET_OFFSET sp_offset=\sp_offset
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.endm
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_X86_UNWIND_HINTS_H */
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