diff options
Diffstat (limited to 'arch/x86/include/asm/unwind_hints.h')
| -rw-r--r-- | arch/x86/include/asm/unwind_hints.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/arch/x86/include/asm/unwind_hints.h b/arch/x86/include/asm/unwind_hints.h new file mode 100644 index 000000000..f66fbe653 --- /dev/null +++ b/arch/x86/include/asm/unwind_hints.h @@ -0,0 +1,74 @@ +#ifndef _ASM_X86_UNWIND_HINTS_H +#define _ASM_X86_UNWIND_HINTS_H + +#include <linux/objtool.h> + +#include "orc_types.h" + +#ifdef __ASSEMBLY__ + +.macro UNWIND_HINT_EMPTY + UNWIND_HINT type=UNWIND_HINT_TYPE_CALL end=1 +.endm + +.macro UNWIND_HINT_ENTRY + UNWIND_HINT type=UNWIND_HINT_TYPE_ENTRY end=1 +.endm + +.macro UNWIND_HINT_REGS base=%rsp offset=0 indirect=0 extra=1 partial=0 + .if \base == %rsp + .if \indirect + .set sp_reg, ORC_REG_SP_INDIRECT + .else + .set sp_reg, ORC_REG_SP + .endif + .elseif \base == %rbp + .set sp_reg, ORC_REG_BP + .elseif \base == %rdi + .set sp_reg, ORC_REG_DI + .elseif \base == %rdx + .set sp_reg, ORC_REG_DX + .elseif \base == %r10 + .set sp_reg, ORC_REG_R10 + .else + .error "UNWIND_HINT_REGS: bad base register" + .endif + + .set sp_offset, \offset + + .if \partial + .set type, UNWIND_HINT_TYPE_REGS_PARTIAL + .elseif \extra == 0 + .set type, UNWIND_HINT_TYPE_REGS_PARTIAL + .set sp_offset, \offset + (16*8) + .else + .set type, UNWIND_HINT_TYPE_REGS + .endif + + UNWIND_HINT sp_reg=sp_reg sp_offset=sp_offset type=type +.endm + +.macro UNWIND_HINT_IRET_REGS base=%rsp offset=0 + UNWIND_HINT_REGS base=\base offset=\offset partial=1 +.endm + +.macro UNWIND_HINT_FUNC + UNWIND_HINT sp_reg=ORC_REG_SP sp_offset=8 type=UNWIND_HINT_TYPE_FUNC +.endm + +.macro UNWIND_HINT_SAVE + UNWIND_HINT type=UNWIND_HINT_TYPE_SAVE +.endm + +.macro UNWIND_HINT_RESTORE + UNWIND_HINT type=UNWIND_HINT_TYPE_RESTORE +.endm + +#else + +#define UNWIND_HINT_FUNC \ + UNWIND_HINT(ORC_REG_SP, 8, UNWIND_HINT_TYPE_FUNC, 0) + +#endif /* __ASSEMBLY__ */ + +#endif /* _ASM_X86_UNWIND_HINTS_H */ |