| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef _ASM_X86_KGDB_H |
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| 3 | #define _ASM_X86_KGDB_H |
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| 4 | |
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| 5 | /* |
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| 6 | * Copyright (C) 2001-2004 Amit S. Kale |
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| 7 | * Copyright (C) 2008 Wind River Systems, Inc. |
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| 8 | */ |
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| 9 | |
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| 10 | #include <asm/ptrace.h> |
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| 11 | |
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| 12 | /* |
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| 13 | * BUFMAX defines the maximum number of characters in inbound/outbound |
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| 14 | * buffers at least NUMREGBYTES*2 are needed for register packets |
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| 15 | * Longer buffer is needed to list all threads |
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| 16 | */ |
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| 17 | #define BUFMAX 1024 |
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| 18 | |
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| 19 | /* |
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| 20 | * Note that this register image is in a different order than |
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| 21 | * the register image that Linux produces at interrupt time. |
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| 22 | * |
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| 23 | * Linux's register image is defined by struct pt_regs in ptrace.h. |
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| 24 | * Just why GDB uses a different order is a historical mystery. |
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| 25 | */ |
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| 26 | #ifdef CONFIG_X86_32 |
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| 27 | enum regnames { |
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| 28 | GDB_AX, /* 0 */ |
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| 29 | GDB_CX, /* 1 */ |
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| 30 | GDB_DX, /* 2 */ |
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| 31 | GDB_BX, /* 3 */ |
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| 32 | GDB_SP, /* 4 */ |
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| 33 | GDB_BP, /* 5 */ |
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| 34 | GDB_SI, /* 6 */ |
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| 35 | GDB_DI, /* 7 */ |
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| 36 | GDB_PC, /* 8 also known as eip */ |
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| 37 | GDB_PS, /* 9 also known as eflags */ |
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| 38 | GDB_CS, /* 10 */ |
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| 39 | GDB_SS, /* 11 */ |
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| 40 | GDB_DS, /* 12 */ |
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| 41 | GDB_ES, /* 13 */ |
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| 42 | GDB_FS, /* 14 */ |
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| 43 | GDB_GS, /* 15 */ |
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| 44 | }; |
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| 45 | #define GDB_ORIG_AX 41 |
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| 46 | #define DBG_MAX_REG_NUM 16 |
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| 47 | #define NUMREGBYTES ((GDB_GS+1)*4) |
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| 48 | #else /* ! CONFIG_X86_32 */ |
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| 49 | enum regnames { |
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| 50 | GDB_AX, /* 0 */ |
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| 51 | GDB_BX, /* 1 */ |
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| 52 | GDB_CX, /* 2 */ |
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| 53 | GDB_DX, /* 3 */ |
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| 54 | GDB_SI, /* 4 */ |
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| 55 | GDB_DI, /* 5 */ |
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| 56 | GDB_BP, /* 6 */ |
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| 57 | GDB_SP, /* 7 */ |
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| 58 | GDB_R8, /* 8 */ |
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| 59 | GDB_R9, /* 9 */ |
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| 60 | GDB_R10, /* 10 */ |
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| 61 | GDB_R11, /* 11 */ |
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| 62 | GDB_R12, /* 12 */ |
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| 63 | GDB_R13, /* 13 */ |
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| 64 | GDB_R14, /* 14 */ |
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| 65 | GDB_R15, /* 15 */ |
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| 66 | GDB_PC, /* 16 */ |
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| 67 | GDB_PS, /* 17 */ |
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| 68 | GDB_CS, /* 18 */ |
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| 69 | GDB_SS, /* 19 */ |
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| 70 | GDB_DS, /* 20 */ |
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| 71 | GDB_ES, /* 21 */ |
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| 72 | GDB_FS, /* 22 */ |
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| 73 | GDB_GS, /* 23 */ |
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| 74 | }; |
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| 75 | #define GDB_ORIG_AX 57 |
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| 76 | #define DBG_MAX_REG_NUM 24 |
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| 77 | /* 17 64 bit regs and 5 32 bit regs */ |
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| 78 | #define NUMREGBYTES ((17 * 8) + (5 * 4)) |
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| 79 | #endif /* ! CONFIG_X86_32 */ |
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| 80 | |
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| 81 | static inline void arch_kgdb_breakpoint(void) |
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| 82 | { |
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| 83 | asm(" int $3" ); |
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| 84 | } |
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| 85 | #define BREAK_INSTR_SIZE 1 |
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| 86 | #define CACHE_FLUSH_IS_SAFE 1 |
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| 87 | #define GDB_ADJUSTS_BREAK_OFFSET |
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| 88 | |
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| 89 | extern int kgdb_ll_trap(int cmd, const char *str, |
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| 90 | struct pt_regs *regs, long err, int trap, int sig); |
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| 91 | |
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| 92 | #endif /* _ASM_X86_KGDB_H */ |
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| 93 | |
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