Warning: That file was not part of the compilation database. It may have many parsing errors.
| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
|---|---|
| 2 | #ifndef _ORC_TYPES_H |
| 3 | #define _ORC_TYPES_H |
| 4 | |
| 5 | #include <linux/types.h> |
| 6 | |
| 7 | /* |
| 8 | * The ORC_REG_* registers are base registers which are used to find other |
| 9 | * registers on the stack. |
| 10 | * |
| 11 | * ORC_REG_PREV_SP, also known as DWARF Call Frame Address (CFA), is the |
| 12 | * address of the previous frame: the caller's SP before it called the current |
| 13 | * function. |
| 14 | * |
| 15 | * ORC_REG_UNDEFINED means the corresponding register's value didn't change in |
| 16 | * the current frame. |
| 17 | * |
| 18 | * The most commonly used base registers are SP and FP -- which the previous SP |
| 19 | * is usually based on -- and PREV_SP and UNDEFINED -- which the previous FP is |
| 20 | * usually based on. |
| 21 | * |
| 22 | * The rest of the base registers are needed for special cases like entry code |
| 23 | * and GCC realigned stacks. |
| 24 | */ |
| 25 | #define ORC_REG_UNDEFINED 0 |
| 26 | #define ORC_REG_PREV_SP 1 |
| 27 | #define ORC_REG_SP 2 |
| 28 | #define ORC_REG_FP 3 |
| 29 | #define ORC_REG_MAX 4 |
| 30 | |
| 31 | #define ORC_TYPE_UNDEFINED 0 |
| 32 | #define ORC_TYPE_END_OF_STACK 1 |
| 33 | #define ORC_TYPE_CALL 2 |
| 34 | #define ORC_TYPE_REGS 3 |
| 35 | #define ORC_TYPE_REGS_PARTIAL 4 |
| 36 | |
| 37 | #ifndef __ASSEMBLER__ |
| 38 | /* |
| 39 | * This struct is more or less a vastly simplified version of the DWARF Call |
| 40 | * Frame Information standard. It contains only the necessary parts of DWARF |
| 41 | * CFI, simplified for ease of access by the in-kernel unwinder. It tells the |
| 42 | * unwinder how to find the previous SP and FP (and sometimes entry regs) on |
| 43 | * the stack for a given code address. Each instance of the struct corresponds |
| 44 | * to one or more code locations. |
| 45 | */ |
| 46 | struct orc_entry { |
| 47 | s16 sp_offset; |
| 48 | s16 fp_offset; |
| 49 | s16 ra_offset; |
| 50 | unsigned int sp_reg:4; |
| 51 | unsigned int fp_reg:4; |
| 52 | unsigned int ra_reg:4; |
| 53 | unsigned int type:3; |
| 54 | unsigned int signal:1; |
| 55 | }; |
| 56 | #endif /* __ASSEMBLER__ */ |
| 57 | |
| 58 | #endif /* _ORC_TYPES_H */ |
| 59 |
Warning: That file was not part of the compilation database. It may have many parsing errors.