include/asm/unwind_hints.h

0001 #ifndef _ASM_X86_UNWIND_HINTS_H
0002 #define _ASM_X86_UNWIND_HINTS_H
0003
0004 #include <linux/objtool.h>
0005
0006 #include "orc_types.h"
0007
0008 #ifdef __ASSEMBLY__
0009
0010 .macro UNWIND_HINT_EMPTY
0011     UNWIND_HINT type=UNWIND_HINT_TYPE_CALL end=1
0012 .endm
0013
0014 .macro UNWIND_HINT_ENTRY
0015     UNWIND_HINT type=UNWIND_HINT_TYPE_ENTRY end=1
0016 .endm
0017
0018 .macro UNWIND_HINT_REGS base=%rsp offset=0 indirect=0 extra=1 partial=0
0019     .if \base == %rsp
0020         .if \indirect
0021             .set sp_reg, ORC_REG_SP_INDIRECT
0022         .else
0023             .set sp_reg, ORC_REG_SP
0024         .endif
0025     .elseif \base == %rbp
0026         .set sp_reg, ORC_REG_BP
0027     .elseif \base == %rdi
0028         .set sp_reg, ORC_REG_DI
0029     .elseif \base == %rdx
0030         .set sp_reg, ORC_REG_DX
0031     .elseif \base == %r10
0032         .set sp_reg, ORC_REG_R10
0033     .else
0034         .error "UNWIND_HINT_REGS: bad base register"
0035     .endif
0036
0037     .set sp_offset, \offset
0038
0039     .if \partial
0040         .set type, UNWIND_HINT_TYPE_REGS_PARTIAL
0041     .elseif \extra == 0
0042         .set type, UNWIND_HINT_TYPE_REGS_PARTIAL
0043         .set sp_offset, \offset + (16*8)
0044     .else
0045         .set type, UNWIND_HINT_TYPE_REGS
0046     .endif
0047
0048     UNWIND_HINT sp_reg=sp_reg sp_offset=sp_offset type=type
0049 .endm
0050
0051 .macro UNWIND_HINT_IRET_REGS base=%rsp offset=0
0052     UNWIND_HINT_REGS base=\base offset=\offset partial=1
0053 .endm
0054
0055 .macro UNWIND_HINT_FUNC
0056     UNWIND_HINT sp_reg=ORC_REG_SP sp_offset=8 type=UNWIND_HINT_TYPE_FUNC
0057 .endm
0058
0059 .macro UNWIND_HINT_SAVE
0060     UNWIND_HINT type=UNWIND_HINT_TYPE_SAVE
0061 .endm
0062
0063 .macro UNWIND_HINT_RESTORE
0064     UNWIND_HINT type=UNWIND_HINT_TYPE_RESTORE
0065 .endm
0066
0067 #else
0068
0069 #define UNWIND_HINT_FUNC \
0070     UNWIND_HINT(ORC_REG_SP, 8, UNWIND_HINT_TYPE_FUNC, 0)
0071
0072 #endif /* __ASSEMBLY__ */
0073
0074 #endif /* _ASM_X86_UNWIND_HINTS_H */