ORC_REG_SP 29 arch/x86/include/asm/unwind_hints.h .macro UNWIND_HINT sp_reg=ORC_REG_SP sp_offset=0 type=ORC_TYPE_CALL end=0 ORC_REG_SP 53 arch/x86/include/asm/unwind_hints.h .set sp_reg, ORC_REG_SP ORC_REG_SP 126 arch/x86/kernel/unwind_orc.c .sp_reg = ORC_REG_SP, ORC_REG_SP 459 arch/x86/kernel/unwind_orc.c case ORC_REG_SP: ORC_REG_SP 1216 tools/objtool/check.c case ORC_REG_SP: ORC_REG_SP 21 tools/objtool/orc_dump.c case ORC_REG_SP: ORC_REG_SP 31 tools/objtool/orc_gen.c orc->sp_reg = ORC_REG_SP;