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