| /* Native support for MIPS running SVR4, for GDB. |
| Copyright 1994, 1995 Free Software Foundation, Inc. |
| |
| 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| #include "defs.h" |
| #include "inferior.h" |
| #include "gdbcore.h" |
| #include "target.h" |
| |
| #include <sys/time.h> |
| #include <sys/procfs.h> |
| #include <setjmp.h> /* For JB_XXX. */ |
| |
| /* Size of elements in jmpbuf */ |
| |
| #define JB_ELEMENT_SIZE 4 |
| |
| /* |
| * See the comment in m68k-tdep.c regarding the utility of these functions. |
| * |
| * These definitions are from the MIPS SVR4 ABI, so they may work for |
| * any MIPS SVR4 target. |
| */ |
| |
| void |
| supply_gregset (gregsetp) |
| gregset_t *gregsetp; |
| { |
| register int regi; |
| register greg_t *regp = &(*gregsetp)[0]; |
| static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0}; |
| |
| for (regi = 0; regi <= CXT_RA; regi++) |
| supply_register (regi, (char *)(regp + regi)); |
| |
| supply_register (PC_REGNUM, (char *)(regp + CXT_EPC)); |
| supply_register (HI_REGNUM, (char *)(regp + CXT_MDHI)); |
| supply_register (LO_REGNUM, (char *)(regp + CXT_MDLO)); |
| supply_register (CAUSE_REGNUM, (char *)(regp + CXT_CAUSE)); |
| |
| /* Fill inaccessible registers with zero. */ |
| supply_register (PS_REGNUM, zerobuf); |
| supply_register (BADVADDR_REGNUM, zerobuf); |
| supply_register (FP_REGNUM, zerobuf); |
| supply_register (UNUSED_REGNUM, zerobuf); |
| for (regi = FIRST_EMBED_REGNUM; regi <= LAST_EMBED_REGNUM; regi++) |
| supply_register (regi, zerobuf); |
| } |
| |
| void |
| fill_gregset (gregsetp, regno) |
| gregset_t *gregsetp; |
| int regno; |
| { |
| int regi; |
| register greg_t *regp = &(*gregsetp)[0]; |
| |
| 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)) |
| *(regp + CXT_EPC) = *(greg_t *) ®isters[REGISTER_BYTE (PC_REGNUM)]; |
| |
| if ((regno == -1) || (regno == CAUSE_REGNUM)) |
| *(regp + CXT_CAUSE) = *(greg_t *) ®isters[REGISTER_BYTE (CAUSE_REGNUM)]; |
| |
| if ((regno == -1) || (regno == HI_REGNUM)) |
| *(regp + CXT_MDHI) = *(greg_t *) ®isters[REGISTER_BYTE (HI_REGNUM)]; |
| |
| if ((regno == -1) || (regno == LO_REGNUM)) |
| *(regp + CXT_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; |
| 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]); |
| |
| supply_register (FCRCS_REGNUM, (char *)&fpregsetp->fp_csr); |
| |
| /* FIXME: how can we supply FCRIR_REGNUM? The ABI doesn't tell us. */ |
| supply_register (FCRIR_REGNUM, zerobuf); |
| } |
| |
| 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 - FP0_REGNUM]); |
| memcpy(to, from, 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; |
| { |
| char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT]; |
| CORE_ADDR jb_addr; |
| |
| 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; |
| } |