/* Native support for the SGI Iris running IRIX version 4, for GDB. Copyright 1988, 1989, 1990, 1991, 1992, 1993 Free Software Foundation, Inc. Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin. Implemented for Irix 4.x by Garrett A. Wollman. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "defs.h" #include "inferior.h" #include #include #include /* For JB_XXX. */ /* Size of elements in jmpbuf */ #define JB_ELEMENT_SIZE 4 typedef unsigned int greg_t; /* why isn't this defined? */ /* * See the comment in m68k-tdep.c regarding the utility of these functions. */ void supply_gregset (gregsetp) gregset_t *gregsetp; { register int regi; register greg_t *regp = (greg_t *)(gregsetp->gp_regs); /* FIXME: somewhere, there should be a #define for the meaning of this magic number 32; we should use that. */ for(regi = 0; regi < 32; regi++) supply_register (regi, (char *)(regp + regi)); supply_register (PC_REGNUM, (char *)&(gregsetp->gp_pc)); supply_register (HI_REGNUM, (char *)&(gregsetp->gp_mdhi)); supply_register (LO_REGNUM, (char *)&(gregsetp->gp_mdlo)); supply_register (PS_REGNUM, (char *)&(gregsetp->gp_cause)); } void fill_gregset (gregsetp, regno) gregset_t *gregsetp; int regno; { int regi; register greg_t *regp = (greg_t *)(gregsetp->gp_regs); /* same FIXME as above wrt 32*/ for (regi = 0; regi < 32; regi++) if ((regno == -1) || (regno == regi)) *(regp + regi) = *(greg_t *) ®isters[REGISTER_BYTE (regi)]; if ((regno == -1) || (regno == PC_REGNUM)) gregsetp->gp_pc = *(greg_t *) ®isters[REGISTER_BYTE (PC_REGNUM)]; if ((regno == -1) || (regno == PS_REGNUM)) gregsetp->gp_cause = *(greg_t *) ®isters[REGISTER_BYTE (PS_REGNUM)]; if ((regno == -1) || (regno == HI_REGNUM)) gregsetp->gp_mdhi = *(greg_t *) ®isters[REGISTER_BYTE (HI_REGNUM)]; if ((regno == -1) || (regno == LO_REGNUM)) gregsetp->gp_mdlo = *(greg_t *) ®isters[REGISTER_BYTE (LO_REGNUM)]; } /* * Now we do the same thing for floating-point registers. * We don't bother to condition on FP0_REGNUM since any * reasonable MIPS configuration has an R3010 in it. * * Again, see the comments in m68k-tdep.c. */ void supply_fpregset (fpregsetp) fpregset_t *fpregsetp; { register int regi; for (regi = 0; regi < 32; regi++) supply_register (FP0_REGNUM + regi, (char *)&fpregsetp->fp_r.fp_regs[regi]); supply_register (FCRCS_REGNUM, (char *)&fpregsetp->fp_csr); /* FIXME: how can we supply FCRIR_REGNUM? SGI doesn't tell us. */ } void fill_fpregset (fpregsetp, regno) fpregset_t *fpregsetp; int regno; { int regi; char *from, *to; for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++) { if ((regno == -1) || (regno == regi)) { from = (char *) ®isters[REGISTER_BYTE (regi)]; to = (char *) &(fpregsetp->fp_r.fp_regs[regi]); bcopy(from, to, REGISTER_RAW_SIZE (regi)); } } if ((regno == -1) || (regno == FCRCS_REGNUM)) fpregsetp->fp_csr = *(unsigned *) ®isters[REGISTER_BYTE(FCRCS_REGNUM)]; } /* Figure out where the longjmp will land. We expect the first arg to be a pointer to the jmp_buf structure from which we extract the pc (JB_PC) that we will land at. The pc is copied into PC. This routine returns true on success. */ int get_longjmp_target(pc) CORE_ADDR *pc; { CORE_ADDR jb_addr; jb_addr = read_register(A0_REGNUM); if (target_read_memory(jb_addr + JB_PC * JB_ELEMENT_SIZE, pc, sizeof(CORE_ADDR))) return 0; SWAP_TARGET_AND_HOST(pc, sizeof(CORE_ADDR)); return 1; } void fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr) char *core_reg_sect; unsigned core_reg_size; int which; /* Unused */ unsigned int reg_addr; /* Unused */ { if (core_reg_size != REGISTER_BYTES) { warning ("wrong size gregset struct in core file"); return; } memcpy ((char *)registers, core_reg_sect, core_reg_size); }