| 1 | /* Native support for the SGI Iris running IRIX version 4, for GDB. |
| 2 | Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1995 |
| 3 | Free Software Foundation, Inc. |
| 4 | Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU |
| 5 | and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin. |
| 6 | Implemented for Irix 4.x by Garrett A. Wollman. |
| 7 | |
| 8 | This file is part of GDB. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 2 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program; if not, write to the Free Software |
| 22 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 23 | |
| 24 | #include "defs.h" |
| 25 | #include "inferior.h" |
| 26 | #include "gdbcore.h" |
| 27 | |
| 28 | #include <sys/time.h> |
| 29 | #include <sys/procfs.h> |
| 30 | #include <setjmp.h> /* For JB_XXX. */ |
| 31 | |
| 32 | /* Size of elements in jmpbuf */ |
| 33 | |
| 34 | #define JB_ELEMENT_SIZE 4 |
| 35 | |
| 36 | typedef unsigned int greg_t; /* why isn't this defined? */ |
| 37 | |
| 38 | static void |
| 39 | fetch_core_registers PARAMS ((char *, unsigned int, int, CORE_ADDR)); |
| 40 | |
| 41 | /* |
| 42 | * See the comment in m68k-tdep.c regarding the utility of these functions. |
| 43 | */ |
| 44 | |
| 45 | void |
| 46 | supply_gregset (gregsetp) |
| 47 | gregset_t *gregsetp; |
| 48 | { |
| 49 | register int regi; |
| 50 | register greg_t *regp = (greg_t *)(gregsetp->gp_regs); |
| 51 | static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0}; |
| 52 | |
| 53 | /* FIXME: somewhere, there should be a #define for the meaning |
| 54 | of this magic number 32; we should use that. */ |
| 55 | for(regi = 0; regi < 32; regi++) |
| 56 | supply_register (regi, (char *)(regp + regi)); |
| 57 | |
| 58 | supply_register (PC_REGNUM, (char *)&(gregsetp->gp_pc)); |
| 59 | supply_register (HI_REGNUM, (char *)&(gregsetp->gp_mdhi)); |
| 60 | supply_register (LO_REGNUM, (char *)&(gregsetp->gp_mdlo)); |
| 61 | supply_register (CAUSE_REGNUM, (char *)&(gregsetp->gp_cause)); |
| 62 | |
| 63 | /* Fill inaccessible registers with zero. */ |
| 64 | supply_register (BADVADDR_REGNUM, zerobuf); |
| 65 | } |
| 66 | |
| 67 | void |
| 68 | fill_gregset (gregsetp, regno) |
| 69 | gregset_t *gregsetp; |
| 70 | int regno; |
| 71 | { |
| 72 | int regi; |
| 73 | register greg_t *regp = (greg_t *)(gregsetp->gp_regs); |
| 74 | |
| 75 | /* same FIXME as above wrt 32*/ |
| 76 | for (regi = 0; regi < 32; regi++) |
| 77 | if ((regno == -1) || (regno == regi)) |
| 78 | *(regp + regi) = *(greg_t *) ®isters[REGISTER_BYTE (regi)]; |
| 79 | |
| 80 | if ((regno == -1) || (regno == PC_REGNUM)) |
| 81 | gregsetp->gp_pc = *(greg_t *) ®isters[REGISTER_BYTE (PC_REGNUM)]; |
| 82 | |
| 83 | if ((regno == -1) || (regno == CAUSE_REGNUM)) |
| 84 | gregsetp->gp_cause = *(greg_t *) ®isters[REGISTER_BYTE (CAUSE_REGNUM)]; |
| 85 | |
| 86 | if ((regno == -1) || (regno == HI_REGNUM)) |
| 87 | gregsetp->gp_mdhi = *(greg_t *) ®isters[REGISTER_BYTE (HI_REGNUM)]; |
| 88 | |
| 89 | if ((regno == -1) || (regno == LO_REGNUM)) |
| 90 | gregsetp->gp_mdlo = *(greg_t *) ®isters[REGISTER_BYTE (LO_REGNUM)]; |
| 91 | } |
| 92 | |
| 93 | /* |
| 94 | * Now we do the same thing for floating-point registers. |
| 95 | * We don't bother to condition on FP0_REGNUM since any |
| 96 | * reasonable MIPS configuration has an R3010 in it. |
| 97 | * |
| 98 | * Again, see the comments in m68k-tdep.c. |
| 99 | */ |
| 100 | |
| 101 | void |
| 102 | supply_fpregset (fpregsetp) |
| 103 | fpregset_t *fpregsetp; |
| 104 | { |
| 105 | register int regi; |
| 106 | static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0}; |
| 107 | |
| 108 | for (regi = 0; regi < 32; regi++) |
| 109 | supply_register (FP0_REGNUM + regi, |
| 110 | (char *)&fpregsetp->fp_r.fp_regs[regi]); |
| 111 | |
| 112 | supply_register (FCRCS_REGNUM, (char *)&fpregsetp->fp_csr); |
| 113 | |
| 114 | /* FIXME: how can we supply FCRIR_REGNUM? SGI doesn't tell us. */ |
| 115 | supply_register (FCRIR_REGNUM, zerobuf); |
| 116 | } |
| 117 | |
| 118 | void |
| 119 | fill_fpregset (fpregsetp, regno) |
| 120 | fpregset_t *fpregsetp; |
| 121 | int regno; |
| 122 | { |
| 123 | int regi; |
| 124 | char *from, *to; |
| 125 | |
| 126 | for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++) |
| 127 | { |
| 128 | if ((regno == -1) || (regno == regi)) |
| 129 | { |
| 130 | from = (char *) ®isters[REGISTER_BYTE (regi)]; |
| 131 | to = (char *) &(fpregsetp->fp_r.fp_regs[regi - FP0_REGNUM]); |
| 132 | memcpy(to, from, REGISTER_RAW_SIZE (regi)); |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | if ((regno == -1) || (regno == FCRCS_REGNUM)) |
| 137 | fpregsetp->fp_csr = *(unsigned *) ®isters[REGISTER_BYTE(FCRCS_REGNUM)]; |
| 138 | } |
| 139 | |
| 140 | |
| 141 | /* Figure out where the longjmp will land. |
| 142 | We expect the first arg to be a pointer to the jmp_buf structure from which |
| 143 | we extract the pc (JB_PC) that we will land at. The pc is copied into PC. |
| 144 | This routine returns true on success. */ |
| 145 | |
| 146 | int |
| 147 | get_longjmp_target (pc) |
| 148 | CORE_ADDR *pc; |
| 149 | { |
| 150 | char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT]; |
| 151 | CORE_ADDR jb_addr; |
| 152 | |
| 153 | jb_addr = read_register (A0_REGNUM); |
| 154 | |
| 155 | if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf, |
| 156 | TARGET_PTR_BIT / TARGET_CHAR_BIT)) |
| 157 | return 0; |
| 158 | |
| 159 | *pc = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT); |
| 160 | |
| 161 | return 1; |
| 162 | } |
| 163 | |
| 164 | static void |
| 165 | fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr) |
| 166 | char *core_reg_sect; |
| 167 | unsigned core_reg_size; |
| 168 | int which; /* Unused */ |
| 169 | CORE_ADDR reg_addr; /* Unused */ |
| 170 | { |
| 171 | if (core_reg_size != REGISTER_BYTES) |
| 172 | { |
| 173 | warning ("wrong size gregset struct in core file"); |
| 174 | return; |
| 175 | } |
| 176 | |
| 177 | memcpy ((char *)registers, core_reg_sect, core_reg_size); |
| 178 | } |
| 179 | |
| 180 | \f |
| 181 | /* Register that we are able to handle irix4 core file formats. |
| 182 | FIXME: is this really bfd_target_unknown_flavour? */ |
| 183 | |
| 184 | static struct core_fns irix4_core_fns = |
| 185 | { |
| 186 | bfd_target_unknown_flavour, |
| 187 | fetch_core_registers, |
| 188 | NULL |
| 189 | }; |
| 190 | |
| 191 | void |
| 192 | _initialize_core_irix4 () |
| 193 | { |
| 194 | add_core_fns (&irix4_core_fns); |
| 195 | } |