/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (C) 2017 Josh Poimboeuf <[email protected]> */ #ifndef _ORC_TYPES_H #define _ORC_TYPES_H #include <linux/types.h> #include <linux/compiler.h> /* * The ORC_REG_* registers are base registers which are used to find other * registers on the stack. * * ORC_REG_PREV_SP, also known as DWARF Call Frame Address (CFA), is the * address of the previous frame: the caller's SP before it called the current * function. * * ORC_REG_UNDEFINED means the corresponding register's value didn't change in * the current frame. * * The most commonly used base registers are SP and BP -- which the previous SP * is usually based on -- and PREV_SP and UNDEFINED -- which the previous BP is * usually based on. * * The rest of the base registers are needed for special cases like entry code * and GCC realigned stacks. */ #define ORC_REG_UNDEFINED … #define ORC_REG_PREV_SP … #define ORC_REG_DX … #define ORC_REG_DI … #define ORC_REG_BP … #define ORC_REG_SP … #define ORC_REG_R10 … #define ORC_REG_R13 … #define ORC_REG_BP_INDIRECT … #define ORC_REG_SP_INDIRECT … #define ORC_REG_MAX … #define ORC_TYPE_UNDEFINED … #define ORC_TYPE_END_OF_STACK … #define ORC_TYPE_CALL … #define ORC_TYPE_REGS … #define ORC_TYPE_REGS_PARTIAL … #ifndef __ASSEMBLY__ #include <asm/byteorder.h> /* * This struct is more or less a vastly simplified version of the DWARF Call * Frame Information standard. It contains only the necessary parts of DWARF * CFI, simplified for ease of access by the in-kernel unwinder. It tells the * unwinder how to find the previous SP and BP (and sometimes entry regs) on * the stack for a given code address. Each instance of the struct corresponds * to one or more code locations. */ struct orc_entry { … } __packed; #endif /* __ASSEMBLY__ */ #endif /* _ORC_TYPES_H */
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