include/asm-mips/gdb-stub.h

   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
 143 struct 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
 210 extern int kgdb_enabled;
 211 void set_debug_traps(void);
 212 void set_async_breakpoint(unsigned long *epc);
 213
 214 #endif /* !__ASSEMBLY__ */
 215 #endif /* _ASM_GDB_STUB_H */