1/* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 1995 Andreas Busse 7 * Copyright (C) 2003 Ralf Baechle 8 */ 9#ifndef _ASM_GDB_STUB_H 10#define _ASM_GDB_STUB_H 11 12 13/* 14 * important register numbers 15 */ 16 17#define REG_EPC 37 18#define REG_FP 72 19#define REG_SP 29 20 21/* 22 * Stack layout for the GDB exception handler 23 * Derived from the stack layout described in asm-mips/stackframe.h 24 * 25 * The first PTRSIZE*6 bytes are argument save space for C subroutines. 26 */ 27#define NUMREGS 90 28 29#define GDB_FR_REG0 (PTRSIZE*6) /* 0 */ 30#define GDB_FR_REG1 ((GDB_FR_REG0) + LONGSIZE) /* 1 */ 31#define GDB_FR_REG2 ((GDB_FR_REG1) + LONGSIZE) /* 2 */ 32#define GDB_FR_REG3 ((GDB_FR_REG2) + LONGSIZE) /* 3 */ 33#define GDB_FR_REG4 ((GDB_FR_REG3) + LONGSIZE) /* 4 */ 34#define GDB_FR_REG5 ((GDB_FR_REG4) + LONGSIZE) /* 5 */ 35#define GDB_FR_REG6 ((GDB_FR_REG5) + LONGSIZE) /* 6 */ 36#define GDB_FR_REG7 ((GDB_FR_REG6) + LONGSIZE) /* 7 */ 37#define GDB_FR_REG8 ((GDB_FR_REG7) + LONGSIZE) /* 8 */ 38#define GDB_FR_REG9 ((GDB_FR_REG8) + LONGSIZE) /* 9 */ 39#define GDB_FR_REG10 ((GDB_FR_REG9) + LONGSIZE) /* 10 */ 40#define GDB_FR_REG11 ((GDB_FR_REG10) + LONGSIZE) /* 11 */ 41#define GDB_FR_REG12 ((GDB_FR_REG11) + LONGSIZE) /* 12 */ 42#define GDB_FR_REG13 ((GDB_FR_REG12) + LONGSIZE) /* 13 */ 43#define GDB_FR_REG14 ((GDB_FR_REG13) + LONGSIZE) /* 14 */ 44#define GDB_FR_REG15 ((GDB_FR_REG14) + LONGSIZE) /* 15 */ 45#define GDB_FR_REG16 ((GDB_FR_REG15) + LONGSIZE) /* 16 */ 46#define GDB_FR_REG17 ((GDB_FR_REG16) + LONGSIZE) /* 17 */ 47#define GDB_FR_REG18 ((GDB_FR_REG17) + LONGSIZE) /* 18 */ 48#define GDB_FR_REG19 ((GDB_FR_REG18) + LONGSIZE) /* 19 */ 49#define GDB_FR_REG20 ((GDB_FR_REG19) + LONGSIZE) /* 20 */ 50#define GDB_FR_REG21 ((GDB_FR_REG20) + LONGSIZE) /* 21 */ 51#define GDB_FR_REG22 ((GDB_FR_REG21) + LONGSIZE) /* 22 */ 52#define GDB_FR_REG23 ((GDB_FR_REG22) + LONGSIZE) /* 23 */ 53#define GDB_FR_REG24 ((GDB_FR_REG23) + LONGSIZE) /* 24 */ 54#define GDB_FR_REG25 ((GDB_FR_REG24) + LONGSIZE) /* 25 */ 55#define GDB_FR_REG26 ((GDB_FR_REG25) + LONGSIZE) /* 26 */ 56#define GDB_FR_REG27 ((GDB_FR_REG26) + LONGSIZE) /* 27 */ 57#define GDB_FR_REG28 ((GDB_FR_REG27) + LONGSIZE) /* 28 */ 58#define GDB_FR_REG29 ((GDB_FR_REG28) + LONGSIZE) /* 29 */ 59#define GDB_FR_REG30 ((GDB_FR_REG29) + LONGSIZE) /* 30 */ 60#define GDB_FR_REG31 ((GDB_FR_REG30) + LONGSIZE) /* 31 */ 61 62/* 63 * Saved special registers 64 */ 65#define GDB_FR_STATUS ((GDB_FR_REG31) + LONGSIZE) /* 32 */ 66#define GDB_FR_LO ((GDB_FR_STATUS) + LONGSIZE) /* 33 */ 67#define GDB_FR_HI ((GDB_FR_LO) + LONGSIZE) /* 34 */ 68#define GDB_FR_BADVADDR ((GDB_FR_HI) + LONGSIZE) /* 35 */ 69#define GDB_FR_CAUSE ((GDB_FR_BADVADDR) + LONGSIZE) /* 36 */ 70#define GDB_FR_EPC ((GDB_FR_CAUSE) + LONGSIZE) /* 37 */ 71 72/* 73 * Saved floating point registers 74 */ 75#define GDB_FR_FPR0 ((GDB_FR_EPC) + LONGSIZE) /* 38 */ 76#define GDB_FR_FPR1 ((GDB_FR_FPR0) + LONGSIZE) /* 39 */ 77#define GDB_FR_FPR2 ((GDB_FR_FPR1) + LONGSIZE) /* 40 */ 78#define GDB_FR_FPR3 ((GDB_FR_FPR2) + LONGSIZE) /* 41 */ 79#define GDB_FR_FPR4 ((GDB_FR_FPR3) + LONGSIZE) /* 42 */ 80#define GDB_FR_FPR5 ((GDB_FR_FPR4) + LONGSIZE) /* 43 */ 81#define GDB_FR_FPR6 ((GDB_FR_FPR5) + LONGSIZE) /* 44 */ 82#define GDB_FR_FPR7 ((GDB_FR_FPR6) + LONGSIZE) /* 45 */ 83#define GDB_FR_FPR8 ((GDB_FR_FPR7) + LONGSIZE) /* 46 */ 84#define GDB_FR_FPR9 ((GDB_FR_FPR8) + LONGSIZE) /* 47 */ 85#define GDB_FR_FPR10 ((GDB_FR_FPR9) + LONGSIZE) /* 48 */ 86#define GDB_FR_FPR11 ((GDB_FR_FPR10) + LONGSIZE) /* 49 */ 87#define GDB_FR_FPR12 ((GDB_FR_FPR11) + LONGSIZE) /* 50 */ 88#define GDB_FR_FPR13 ((GDB_FR_FPR12) + LONGSIZE) /* 51 */ 89#define GDB_FR_FPR14 ((GDB_FR_FPR13) + LONGSIZE) /* 52 */ 90#define GDB_FR_FPR15 ((GDB_FR_FPR14) + LONGSIZE) /* 53 */ 91#define GDB_FR_FPR16 ((GDB_FR_FPR15) + LONGSIZE) /* 54 */ 92#define GDB_FR_FPR17 ((GDB_FR_FPR16) + LONGSIZE) /* 55 */ 93#define GDB_FR_FPR18 ((GDB_FR_FPR17) + LONGSIZE) /* 56 */ 94#define GDB_FR_FPR19 ((GDB_FR_FPR18) + LONGSIZE) /* 57 */ 95#define GDB_FR_FPR20 ((GDB_FR_FPR19) + LONGSIZE) /* 58 */ 96#define GDB_FR_FPR21 ((GDB_FR_FPR20) + LONGSIZE) /* 59 */ 97#define GDB_FR_FPR22 ((GDB_FR_FPR21) + LONGSIZE) /* 60 */ 98#define GDB_FR_FPR23 ((GDB_FR_FPR22) + LONGSIZE) /* 61 */ 99#define GDB_FR_FPR24 ((GDB_FR_FPR23) + LONGSIZE) /* 62 */ 100#define GDB_FR_FPR25 ((GDB_FR_FPR24) + LONGSIZE) /* 63 */ 101#define GDB_FR_FPR26 ((GDB_FR_FPR25) + LONGSIZE) /* 64 */ 102#define GDB_FR_FPR27 ((GDB_FR_FPR26) + LONGSIZE) /* 65 */ 103#define GDB_FR_FPR28 ((GDB_FR_FPR27) + LONGSIZE) /* 66 */ 104#define GDB_FR_FPR29 ((GDB_FR_FPR28) + LONGSIZE) /* 67 */ 105#define GDB_FR_FPR30 ((GDB_FR_FPR29) + LONGSIZE) /* 68 */ 106#define GDB_FR_FPR31 ((GDB_FR_FPR30) + LONGSIZE) /* 69 */ 107 108#define GDB_FR_FSR ((GDB_FR_FPR31) + LONGSIZE) /* 70 */ 109#define GDB_FR_FIR ((GDB_FR_FSR) + LONGSIZE) /* 71 */ 110#define GDB_FR_FRP ((GDB_FR_FIR) + LONGSIZE) /* 72 */ 111 112#define GDB_FR_DUMMY ((GDB_FR_FRP) + LONGSIZE) /* 73, unused ??? */ 113 114/* 115 * Again, CP0 registers 116 */ 117#define GDB_FR_CP0_INDEX ((GDB_FR_DUMMY) + LONGSIZE) /* 74 */ 118#define GDB_FR_CP0_RANDOM ((GDB_FR_CP0_INDEX) + LONGSIZE) /* 75 */ 119#define GDB_FR_CP0_ENTRYLO0 ((GDB_FR_CP0_RANDOM) + LONGSIZE)/* 76 */ 120#define GDB_FR_CP0_ENTRYLO1 ((GDB_FR_CP0_ENTRYLO0) + LONGSIZE)/* 77 */ 121#define GDB_FR_CP0_CONTEXT ((GDB_FR_CP0_ENTRYLO1) + LONGSIZE)/* 78 */ 122#define GDB_FR_CP0_PAGEMASK ((GDB_FR_CP0_CONTEXT) + LONGSIZE)/* 79 */ 123#define GDB_FR_CP0_WIRED ((GDB_FR_CP0_PAGEMASK) + LONGSIZE)/* 80 */ 124#define GDB_FR_CP0_REG7 ((GDB_FR_CP0_WIRED) + LONGSIZE) /* 81 */ 125#define GDB_FR_CP0_REG8 ((GDB_FR_CP0_REG7) + LONGSIZE) /* 82 */ 126#define GDB_FR_CP0_REG9 ((GDB_FR_CP0_REG8) + LONGSIZE) /* 83 */ 127#define GDB_FR_CP0_ENTRYHI ((GDB_FR_CP0_REG9) + LONGSIZE) /* 84 */ 128#define GDB_FR_CP0_REG11 ((GDB_FR_CP0_ENTRYHI) + LONGSIZE)/* 85 */ 129#define GDB_FR_CP0_REG12 ((GDB_FR_CP0_REG11) + LONGSIZE) /* 86 */ 130#define GDB_FR_CP0_REG13 ((GDB_FR_CP0_REG12) + LONGSIZE) /* 87 */ 131#define GDB_FR_CP0_REG14 ((GDB_FR_CP0_REG13) + LONGSIZE) /* 88 */ 132#define GDB_FR_CP0_PRID ((GDB_FR_CP0_REG14) + LONGSIZE) /* 89 */ 133 134#define GDB_FR_SIZE ((((GDB_FR_CP0_PRID) + LONGSIZE) + (PTRSIZE-1)) & ~(PTRSIZE-1)) 135 136#ifndef __ASSEMBLY__ 137 138/* 139 * This is the same as above, but for the high-level 140 * part of the GDB stub. 141 */ 142 143struct gdb_regs { 144 /* 145 * Pad bytes for argument save space on the stack 146 * 24/48 Bytes for 32/64 bit code 147 */ 148 unsigned long pad0[6]; 149 150 /* 151 * saved main processor registers 152 */ 153 long reg0, reg1, reg2, reg3, reg4, reg5, reg6, reg7; 154 long reg8, reg9, reg10, reg11, reg12, reg13, reg14, reg15; 155 long reg16, reg17, reg18, reg19, reg20, reg21, reg22, reg23; 156 long reg24, reg25, reg26, reg27, reg28, reg29, reg30, reg31; 157 158 /* 159 * Saved special registers 160 */ 161 long cp0_status; 162 long lo; 163 long hi; 164 long cp0_badvaddr; 165 long cp0_cause; 166 long cp0_epc; 167 168 /* 169 * Saved floating point registers 170 */ 171 long fpr0, fpr1, fpr2, fpr3, fpr4, fpr5, fpr6, fpr7; 172 long fpr8, fpr9, fpr10, fpr11, fpr12, fpr13, fpr14, fpr15; 173 long fpr16, fpr17, fpr18, fpr19, fpr20, fpr21, fpr22, fpr23; 174 long fpr24, fpr25, fpr26, fpr27, fpr28, fpr29, fpr30, fpr31; 175 176 long cp1_fsr; 177 long cp1_fir; 178 179 /* 180 * Frame pointer 181 */ 182 long frame_ptr; 183 long dummy; /* unused */ 184 185 /* 186 * saved cp0 registers 187 */ 188 long cp0_index; 189 long cp0_random; 190 long cp0_entrylo0; 191 long cp0_entrylo1; 192 long cp0_context; 193 long cp0_pagemask; 194 long cp0_wired; 195 long cp0_reg7; 196 long cp0_reg8; 197 long cp0_reg9; 198 long cp0_entryhi; 199 long cp0_reg11; 200 long cp0_reg12; 201 long cp0_reg13; 202 long cp0_reg14; 203 long cp0_prid; 204}; 205 206/* 207 * Prototypes 208 */ 209 210extern int kgdb_enabled; 211void set_debug_traps(void); 212void set_async_breakpoint(unsigned long *epc); 213 214#endif /* !__ASSEMBLY__ */ 215#endif /* _ASM_GDB_STUB_H */ 216