X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Firix4-nat.c;h=0f447767af2f78df9a47b773e15ec9d419ab8a39;hb=39f770628a4eaf018fec8d55684bf2ec16ada9cc;hp=5127bc2bd7bba2b5023c2e4207e159ff0876d2d0;hpb=a70dc8981ba77c6eb6deb04310f8e41370a93f8b;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/irix4-nat.c b/gdb/irix4-nat.c index 5127bc2bd7..0f447767af 100644 --- a/gdb/irix4-nat.c +++ b/gdb/irix4-nat.c @@ -1,82 +1,95 @@ -/* Target-dependent code for the MIPS architecture, for GDB, the GNU Debugger. - Copyright 1988, 1989, 1990, 1991, 1992 Free Software Foundation, Inc. +/* Native support for the SGI Iris running IRIX version 4, for GDB. + Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1995, 1996, 1999, 2000, + 2001 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 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 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. + 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. */ + 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., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ #include "defs.h" - -/* - * Implemented for Irix 4.x by Garrett A. Wollman - */ +#include "inferior.h" +#include "gdbcore.h" +#include "regcache.h" #include #include +#include /* For JB_XXX. */ + +/* Prototypes for supply_gregset etc. */ +#include "gregset.h" + +/* Size of elements in jmpbuf */ + +#define JB_ELEMENT_SIZE 4 typedef unsigned int greg_t; /* why isn't this defined? */ +static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR); + /* * See the comment in m68k-tdep.c regarding the utility of these functions. */ -void -supply_gregset (gregsetp) - gregset_t *gregsetp; +void +supply_gregset (gregset_t *gregsetp) { register int regi; - register greg_t *regp = (greg_t *)(gregsetp->gp_regs); + register greg_t *regp = (greg_t *) (gregsetp->gp_regs); + static char zerobuf[MAX_REGISTER_RAW_SIZE] = + {0}; /* 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)); + 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)); + 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 (CAUSE_REGNUM, (char *) &(gregsetp->gp_cause)); + + /* Fill inaccessible registers with zero. */ + supply_register (BADVADDR_REGNUM, zerobuf); } void -fill_gregset (gregsetp, regno) - gregset_t *gregsetp; - int regno; +fill_gregset (gregset_t *gregsetp, int regno) { int regi; - register greg_t *regp = (greg_t *)(gregsetp->gp_regs); - extern char registers[]; + register greg_t *regp = (greg_t *) (gregsetp->gp_regs); - /* same FIXME as above wrt 32*/ + /* 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)]; + *(regp + regi) = *(greg_t *) & registers[REGISTER_BYTE (regi)]; if ((regno == -1) || (regno == PC_REGNUM)) - gregsetp->gp_pc = *(greg_t *) ®isters[REGISTER_BYTE (PC_REGNUM)]; + gregsetp->gp_pc = *(greg_t *) & registers[REGISTER_BYTE (PC_REGNUM)]; - if ((regno == -1) || (regno == PS_REGNUM)) - gregsetp->gp_cause = *(greg_t *) ®isters[REGISTER_BYTE (PS_REGNUM)]; + if ((regno == -1) || (regno == CAUSE_REGNUM)) + gregsetp->gp_cause = *(greg_t *) & registers[REGISTER_BYTE (CAUSE_REGNUM)]; if ((regno == -1) || (regno == HI_REGNUM)) - gregsetp->gp_mdhi = *(greg_t *) ®isters[REGISTER_BYTE (HI_REGNUM)]; + gregsetp->gp_mdhi = *(greg_t *) & registers[REGISTER_BYTE (HI_REGNUM)]; if ((regno == -1) || (regno == LO_REGNUM)) - gregsetp->gp_mdlo = *(greg_t *) ®isters[REGISTER_BYTE (LO_REGNUM)]; + gregsetp->gp_mdlo = *(greg_t *) & registers[REGISTER_BYTE (LO_REGNUM)]; } /* @@ -88,39 +101,107 @@ fill_gregset (gregsetp, regno) */ void -supply_fpregset (fpregsetp) - fpregset_t *fpregsetp; +supply_fpregset (fpregset_t *fpregsetp) { register int regi; + static char zerobuf[MAX_REGISTER_RAW_SIZE] = + {0}; for (regi = 0; regi < 32; regi++) supply_register (FP0_REGNUM + regi, - (char *)&fpregsetp->fp_r.fp_regs[regi]); + (char *) &fpregsetp->fp_r.fp_regs[regi]); - supply_register (FCRCS_REGNUM, (char *)&fpregsetp->fp_csr); + supply_register (FCRCS_REGNUM, (char *) &fpregsetp->fp_csr); /* FIXME: how can we supply FCRIR_REGNUM? SGI doesn't tell us. */ + supply_register (FCRIR_REGNUM, zerobuf); } void -fill_fpregset (fpregsetp, regno) - fpregset_t *fpregsetp; - int regno; +fill_fpregset (fpregset_t *fpregsetp, int regno) { int regi; char *from, *to; - extern char registers[]; 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)); + to = (char *) &(fpregsetp->fp_r.fp_regs[regi - FP0_REGNUM]); + memcpy (to, from, REGISTER_RAW_SIZE (regi)); } } if ((regno == -1) || (regno == FCRCS_REGNUM)) - fpregsetp->fp_csr = *(unsigned *) ®isters[REGISTER_BYTE(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 (CORE_ADDR *pc) +{ + char *buf; + CORE_ADDR jb_addr; + + buf = alloca (TARGET_PTR_BIT / TARGET_CHAR_BIT); + jb_addr = read_register (A0_REGNUM); + + if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf, + TARGET_PTR_BIT / TARGET_CHAR_BIT)) + return 0; + + *pc = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT); + + return 1; +} + +/* Provide registers to GDB from a core file. + + CORE_REG_SECT points to an array of bytes, which were obtained from + a core file which BFD thinks might contain register contents. + CORE_REG_SIZE is its size. + + Normally, WHICH says which register set corelow suspects this is: + 0 --- the general-purpose register set + 2 --- the floating-point register set + However, for Irix 4, WHICH isn't used. + + REG_ADDR is also unused. */ + +static void +fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, + int which, CORE_ADDR reg_addr) +{ + if (core_reg_size != REGISTER_BYTES) + { + warning ("wrong size gregset struct in core file"); + return; + } + + memcpy ((char *) registers, core_reg_sect, core_reg_size); +} + + +/* Register that we are able to handle irix4 core file formats. + FIXME: is this really bfd_target_unknown_flavour? */ + +static struct core_fns irix4_core_fns = +{ + bfd_target_unknown_flavour, /* core_flavour */ + default_check_format, /* check_format */ + default_core_sniffer, /* core_sniffer */ + fetch_core_registers, /* core_read_registers */ + NULL /* next */ +}; + +void +_initialize_core_irix4 (void) +{ + add_core_fns (&irix4_core_fns); }