3496b74562
* irix4-nat.c: Remove externs of registers[], include inferior.h instead. * mips-nat.c: Explicitly initialize zerobuf to 0! * mips-tdep.c (init_extra_frame_info): Undo John's last change. Always setup fci->frame, even if it's non-zero. Too many places depend upon this behavior (and I have to get a release out the door)! * mipsread.c (parse_partial_symbols, psymtab_to_symtab_1): Set processing_gcc_compilation if we find the embedded stabs marker. This fixes several bugs with finding the location of short or char function parameters passed on the stack.
150 lines
4.2 KiB
C
150 lines
4.2 KiB
C
/* Native support for the SGI Iris running IRIX version 4, for GDB.
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Copyright 1988, 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
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Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU
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and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin.
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Implemented for Irix 4.x by Garrett A. Wollman.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "defs.h"
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#include "inferior.h"
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#include <sys/time.h>
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#include <sys/procfs.h>
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#include <setjmp.h> /* For JB_XXX. */
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/* Size of elements in jmpbuf */
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#define JB_ELEMENT_SIZE 4
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typedef unsigned int greg_t; /* why isn't this defined? */
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/*
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* See the comment in m68k-tdep.c regarding the utility of these functions.
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*/
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void
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supply_gregset (gregsetp)
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gregset_t *gregsetp;
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{
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register int regi;
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register greg_t *regp = (greg_t *)(gregsetp->gp_regs);
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/* FIXME: somewhere, there should be a #define for the meaning
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of this magic number 32; we should use that. */
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for(regi = 0; regi < 32; regi++)
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supply_register (regi, (char *)(regp + regi));
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supply_register (PC_REGNUM, (char *)&(gregsetp->gp_pc));
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supply_register (HI_REGNUM, (char *)&(gregsetp->gp_mdhi));
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supply_register (LO_REGNUM, (char *)&(gregsetp->gp_mdlo));
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supply_register (PS_REGNUM, (char *)&(gregsetp->gp_cause));
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}
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void
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fill_gregset (gregsetp, regno)
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gregset_t *gregsetp;
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int regno;
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{
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int regi;
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register greg_t *regp = (greg_t *)(gregsetp->gp_regs);
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/* same FIXME as above wrt 32*/
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for (regi = 0; regi < 32; regi++)
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if ((regno == -1) || (regno == regi))
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*(regp + regi) = *(greg_t *) ®isters[REGISTER_BYTE (regi)];
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if ((regno == -1) || (regno == PC_REGNUM))
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gregsetp->gp_pc = *(greg_t *) ®isters[REGISTER_BYTE (PC_REGNUM)];
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if ((regno == -1) || (regno == PS_REGNUM))
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gregsetp->gp_cause = *(greg_t *) ®isters[REGISTER_BYTE (PS_REGNUM)];
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if ((regno == -1) || (regno == HI_REGNUM))
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gregsetp->gp_mdhi = *(greg_t *) ®isters[REGISTER_BYTE (HI_REGNUM)];
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if ((regno == -1) || (regno == LO_REGNUM))
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gregsetp->gp_mdlo = *(greg_t *) ®isters[REGISTER_BYTE (LO_REGNUM)];
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}
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/*
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* Now we do the same thing for floating-point registers.
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* We don't bother to condition on FP0_REGNUM since any
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* reasonable MIPS configuration has an R3010 in it.
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*
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* Again, see the comments in m68k-tdep.c.
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*/
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void
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supply_fpregset (fpregsetp)
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fpregset_t *fpregsetp;
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{
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register int regi;
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for (regi = 0; regi < 32; regi++)
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supply_register (FP0_REGNUM + regi,
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(char *)&fpregsetp->fp_r.fp_regs[regi]);
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supply_register (FCRCS_REGNUM, (char *)&fpregsetp->fp_csr);
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/* FIXME: how can we supply FCRIR_REGNUM? SGI doesn't tell us. */
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}
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void
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fill_fpregset (fpregsetp, regno)
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fpregset_t *fpregsetp;
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int regno;
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{
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int regi;
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char *from, *to;
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for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++)
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{
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if ((regno == -1) || (regno == regi))
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{
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from = (char *) ®isters[REGISTER_BYTE (regi)];
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to = (char *) &(fpregsetp->fp_r.fp_regs[regi]);
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bcopy(from, to, REGISTER_RAW_SIZE (regi));
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}
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}
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if ((regno == -1) || (regno == FCRCS_REGNUM))
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fpregsetp->fp_csr = *(unsigned *) ®isters[REGISTER_BYTE(FCRCS_REGNUM)];
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}
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/* Figure out where the longjmp will land.
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We expect the first arg to be a pointer to the jmp_buf structure from which
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we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
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This routine returns true on success. */
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int
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get_longjmp_target(pc)
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CORE_ADDR *pc;
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{
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CORE_ADDR jb_addr;
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jb_addr = read_register(A0_REGNUM);
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if (target_read_memory(jb_addr + JB_PC * JB_ELEMENT_SIZE, pc,
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sizeof(CORE_ADDR)))
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return 0;
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SWAP_TARGET_AND_HOST(pc, sizeof(CORE_ADDR));
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return 1;
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}
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