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607fc93c5d
* mips-tdep.h (MIPS_FIRST_EMBED_REGNUM) (MIPS_LAST_EMBED_REGNUM): Add. * config/mips/tm-mips.h (FIRST_EMBED_REGNUM) (LAST_EMBED_REGNUM): Delete. * mipsv4-nat.c, mips-tdep.c, mips-linux-tdep.c: Update.
174 lines
5.7 KiB
C
174 lines
5.7 KiB
C
/* Native support for MIPS running SVR4, for GDB.
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Copyright 1994, 1995, 2000, 2001 Free Software Foundation, Inc.
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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., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "inferior.h"
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#include "gdbcore.h"
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#include "target.h"
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#include "regcache.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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/* Prototypes for supply_gregset etc. */
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#include "gregset.h"
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/* Size of elements in jmpbuf */
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#define JB_ELEMENT_SIZE 4
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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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* These definitions are from the MIPS SVR4 ABI, so they may work for
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* any MIPS SVR4 target.
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*/
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void
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supply_gregset (gregset_t *gregsetp)
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{
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int regi;
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greg_t *regp = &(*gregsetp)[0];
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char zerobuf[MAX_REGISTER_SIZE];
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memset (zerobuf, 0, MAX_REGISTER_SIZE);
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for (regi = 0; regi <= CXT_RA; regi++)
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regcache_raw_supply (current_regcache, regi, (char *) (regp + regi));
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regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->pc,
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(char *) (regp + CXT_EPC));
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regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->hi,
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(char *) (regp + CXT_MDHI));
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regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->lo,
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(char *) (regp + CXT_MDLO));
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regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->cause,
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(char *) (regp + CXT_CAUSE));
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/* Fill inaccessible registers with zero. */
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regcache_raw_supply (current_regcache, MIPS_PS_REGNUM, zerobuf);
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regcache_raw_supply (current_regcache,
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mips_regnum (current_gdbarch)->badvaddr,
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zerobuf);
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regcache_raw_supply (current_regcache, DEPRECATED_FP_REGNUM, zerobuf);
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regcache_raw_supply (current_regcache, MIPS_UNUSED_REGNUM, zerobuf);
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for (regi = MIPS_FIRST_EMBED_REGNUM; regi <= MIPS_LAST_EMBED_REGNUM; regi++)
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regcache_raw_supply (current_regcache, regi, zerobuf);
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}
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void
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fill_gregset (gregset_t *gregsetp, int regno)
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{
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int regi;
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greg_t *regp = &(*gregsetp)[0];
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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 *) & deprecated_registers[DEPRECATED_REGISTER_BYTE (regi)];
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if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->pc))
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*(regp + CXT_EPC) = *(greg_t *) & deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->pc)];
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if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->cause))
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*(regp + CXT_CAUSE) = *(greg_t *) & deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->cause)];
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if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->hi))
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*(regp + CXT_MDHI) = *(greg_t *) & deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->hi)];
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if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->lo))
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*(regp + CXT_MDLO) = *(greg_t *) & deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->lo)];
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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 (fpregset_t *fpregsetp)
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{
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int regi;
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char zerobuf[MAX_REGISTER_SIZE];
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memset (zerobuf, 0, MAX_REGISTER_SIZE);
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for (regi = 0; regi < 32; regi++)
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regcache_raw_supply (current_regcache,
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mips_regnum (current_gdbarch)->fp0 + regi,
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(char *) &fpregsetp->fp_r.fp_regs[regi]);
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regcache_raw_supply (current_regcache,
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mips_regnum (current_gdbarch)->fp_control_status,
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(char *) &fpregsetp->fp_csr);
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/* FIXME: how can we supply FCRIR? The ABI doesn't tell us. */
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regcache_raw_supply (current_regcache,
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mips_regnum (current_gdbarch)->fp_implementation_revision,
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zerobuf);
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}
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void
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fill_fpregset (fpregset_t *fpregsetp, 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 = mips_regnum (current_gdbarch)->fp0;
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regi < mips_regnum (current_gdbarch)->fp0 + 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 *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (regi)];
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to = (char *) &(fpregsetp->fp_r.fp_regs[regi - mips_regnum (current_gdbarch)->fp0]);
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memcpy (to, from, register_size (current_gdbarch, regi));
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}
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}
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if ((regno == -1)
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|| (regno == mips_regnum (current_gdbarch)->fp_control_status))
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fpregsetp->fp_csr = *(unsigned *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)];
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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 (CORE_ADDR *pc)
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{
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char *buf;
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CORE_ADDR jb_addr;
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buf = alloca (TARGET_PTR_BIT / TARGET_CHAR_BIT);
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jb_addr = read_register (MIPS_A0_REGNUM);
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if (target_read_memory (jb_addr + _JB_PC * JB_ELEMENT_SIZE, buf,
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TARGET_PTR_BIT / TARGET_CHAR_BIT))
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return 0;
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*pc = extract_unsigned_integer (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
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return 1;
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}
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