| 1 | /* Native support for the SGI Iris running IRIX version 4, for GDB. |
| 2 | Copyright 1988, 1989, 1990, 1991, 1992, 1993 Free Software Foundation, Inc. |
| 3 | Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU |
| 4 | and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin. |
| 5 | Implemented for Irix 4.x by Garrett A. Wollman. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 2 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program; if not, write to the Free Software |
| 21 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | #include "inferior.h" |
| 25 | |
| 26 | #include <sys/time.h> |
| 27 | #include <sys/procfs.h> |
| 28 | #include <setjmp.h> /* For JB_XXX. */ |
| 29 | |
| 30 | /* Size of elements in jmpbuf */ |
| 31 | |
| 32 | #define JB_ELEMENT_SIZE 4 |
| 33 | |
| 34 | typedef unsigned int greg_t; /* why isn't this defined? */ |
| 35 | |
| 36 | /* |
| 37 | * See the comment in m68k-tdep.c regarding the utility of these functions. |
| 38 | */ |
| 39 | |
| 40 | void |
| 41 | supply_gregset (gregsetp) |
| 42 | gregset_t *gregsetp; |
| 43 | { |
| 44 | register int regi; |
| 45 | register greg_t *regp = (greg_t *)(gregsetp->gp_regs); |
| 46 | |
| 47 | /* FIXME: somewhere, there should be a #define for the meaning |
| 48 | of this magic number 32; we should use that. */ |
| 49 | for(regi = 0; regi < 32; regi++) |
| 50 | supply_register (regi, (char *)(regp + regi)); |
| 51 | |
| 52 | supply_register (PC_REGNUM, (char *)&(gregsetp->gp_pc)); |
| 53 | supply_register (HI_REGNUM, (char *)&(gregsetp->gp_mdhi)); |
| 54 | supply_register (LO_REGNUM, (char *)&(gregsetp->gp_mdlo)); |
| 55 | supply_register (PS_REGNUM, (char *)&(gregsetp->gp_cause)); |
| 56 | } |
| 57 | |
| 58 | void |
| 59 | fill_gregset (gregsetp, regno) |
| 60 | gregset_t *gregsetp; |
| 61 | int regno; |
| 62 | { |
| 63 | int regi; |
| 64 | register greg_t *regp = (greg_t *)(gregsetp->gp_regs); |
| 65 | |
| 66 | /* same FIXME as above wrt 32*/ |
| 67 | for (regi = 0; regi < 32; regi++) |
| 68 | if ((regno == -1) || (regno == regi)) |
| 69 | *(regp + regi) = *(greg_t *) ®isters[REGISTER_BYTE (regi)]; |
| 70 | |
| 71 | if ((regno == -1) || (regno == PC_REGNUM)) |
| 72 | gregsetp->gp_pc = *(greg_t *) ®isters[REGISTER_BYTE (PC_REGNUM)]; |
| 73 | |
| 74 | if ((regno == -1) || (regno == PS_REGNUM)) |
| 75 | gregsetp->gp_cause = *(greg_t *) ®isters[REGISTER_BYTE (PS_REGNUM)]; |
| 76 | |
| 77 | if ((regno == -1) || (regno == HI_REGNUM)) |
| 78 | gregsetp->gp_mdhi = *(greg_t *) ®isters[REGISTER_BYTE (HI_REGNUM)]; |
| 79 | |
| 80 | if ((regno == -1) || (regno == LO_REGNUM)) |
| 81 | gregsetp->gp_mdlo = *(greg_t *) ®isters[REGISTER_BYTE (LO_REGNUM)]; |
| 82 | } |
| 83 | |
| 84 | /* |
| 85 | * Now we do the same thing for floating-point registers. |
| 86 | * We don't bother to condition on FP0_REGNUM since any |
| 87 | * reasonable MIPS configuration has an R3010 in it. |
| 88 | * |
| 89 | * Again, see the comments in m68k-tdep.c. |
| 90 | */ |
| 91 | |
| 92 | void |
| 93 | supply_fpregset (fpregsetp) |
| 94 | fpregset_t *fpregsetp; |
| 95 | { |
| 96 | register int regi; |
| 97 | |
| 98 | for (regi = 0; regi < 32; regi++) |
| 99 | supply_register (FP0_REGNUM + regi, |
| 100 | (char *)&fpregsetp->fp_r.fp_regs[regi]); |
| 101 | |
| 102 | supply_register (FCRCS_REGNUM, (char *)&fpregsetp->fp_csr); |
| 103 | |
| 104 | /* FIXME: how can we supply FCRIR_REGNUM? SGI doesn't tell us. */ |
| 105 | } |
| 106 | |
| 107 | void |
| 108 | fill_fpregset (fpregsetp, regno) |
| 109 | fpregset_t *fpregsetp; |
| 110 | int regno; |
| 111 | { |
| 112 | int regi; |
| 113 | char *from, *to; |
| 114 | |
| 115 | for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++) |
| 116 | { |
| 117 | if ((regno == -1) || (regno == regi)) |
| 118 | { |
| 119 | from = (char *) ®isters[REGISTER_BYTE (regi)]; |
| 120 | to = (char *) &(fpregsetp->fp_r.fp_regs[regi - FP0_REGNUM]); |
| 121 | bcopy(from, to, REGISTER_RAW_SIZE (regi)); |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | if ((regno == -1) || (regno == FCRCS_REGNUM)) |
| 126 | fpregsetp->fp_csr = *(unsigned *) ®isters[REGISTER_BYTE(FCRCS_REGNUM)]; |
| 127 | } |
| 128 | |
| 129 | |
| 130 | /* Figure out where the longjmp will land. |
| 131 | We expect the first arg to be a pointer to the jmp_buf structure from which |
| 132 | we extract the pc (JB_PC) that we will land at. The pc is copied into PC. |
| 133 | This routine returns true on success. */ |
| 134 | |
| 135 | int |
| 136 | get_longjmp_target(pc) |
| 137 | CORE_ADDR *pc; |
| 138 | { |
| 139 | CORE_ADDR jb_addr; |
| 140 | |
| 141 | jb_addr = read_register(A0_REGNUM); |
| 142 | |
| 143 | if (target_read_memory(jb_addr + JB_PC * JB_ELEMENT_SIZE, pc, |
| 144 | sizeof(CORE_ADDR))) |
| 145 | return 0; |
| 146 | |
| 147 | SWAP_TARGET_AND_HOST(pc, sizeof(CORE_ADDR)); |
| 148 | |
| 149 | return 1; |
| 150 | } |
| 151 | |
| 152 | void |
| 153 | fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr) |
| 154 | char *core_reg_sect; |
| 155 | unsigned core_reg_size; |
| 156 | int which; /* Unused */ |
| 157 | unsigned int reg_addr; /* Unused */ |
| 158 | { |
| 159 | if (core_reg_size != REGISTER_BYTES) |
| 160 | { |
| 161 | warning ("wrong size gregset struct in core file"); |
| 162 | return; |
| 163 | } |
| 164 | |
| 165 | memcpy ((char *)registers, core_reg_sect, core_reg_size); |
| 166 | } |