| /* Native support for MIPS running SVR4, for GDB. |
| Copyright (C) 1994, 1995, 2000, 2001 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., 51 Franklin Street, Fifth Floor, |
| Boston, MA 02110-1301, USA. */ |
| |
| #include "defs.h" |
| #include "inferior.h" |
| #include "gdbcore.h" |
| #include "target.h" |
| #include "regcache.h" |
| |
| #include <sys/time.h> |
| #include <sys/procfs.h> |
| #include <setjmp.h> /* For JB_XXX. */ |
| |
| /* Prototypes for supply_gregset etc. */ |
| #include "gregset.h" |
| |
| /* 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 (gregset_t *gregsetp) |
| { |
| int regi; |
| greg_t *regp = &(*gregsetp)[0]; |
| char zerobuf[MAX_REGISTER_SIZE]; |
| memset (zerobuf, 0, MAX_REGISTER_SIZE); |
| |
| for (regi = 0; regi <= CXT_RA; regi++) |
| regcache_raw_supply (current_regcache, regi, (char *) (regp + regi)); |
| |
| regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->pc, |
| (char *) (regp + CXT_EPC)); |
| regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->hi, |
| (char *) (regp + CXT_MDHI)); |
| regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->lo, |
| (char *) (regp + CXT_MDLO)); |
| regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->cause, |
| (char *) (regp + CXT_CAUSE)); |
| |
| /* Fill inaccessible registers with zero. */ |
| regcache_raw_supply (current_regcache, MIPS_PS_REGNUM, zerobuf); |
| regcache_raw_supply (current_regcache, |
| mips_regnum (current_gdbarch)->badvaddr, |
| zerobuf); |
| regcache_raw_supply (current_regcache, DEPRECATED_FP_REGNUM, zerobuf); |
| regcache_raw_supply (current_regcache, MIPS_UNUSED_REGNUM, zerobuf); |
| for (regi = MIPS_FIRST_EMBED_REGNUM; regi <= MIPS_LAST_EMBED_REGNUM; regi++) |
| regcache_raw_supply (current_regcache, regi, zerobuf); |
| } |
| |
| void |
| fill_gregset (gregset_t *gregsetp, int regno) |
| { |
| int regi; |
| greg_t *regp = &(*gregsetp)[0]; |
| |
| for (regi = 0; regi <= 32; regi++) |
| if ((regno == -1) || (regno == regi)) |
| *(regp + regi) = *(greg_t *) & deprecated_registers[DEPRECATED_REGISTER_BYTE (regi)]; |
| |
| if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->pc)) |
| *(regp + CXT_EPC) = *(greg_t *) & deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->pc)]; |
| |
| if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->cause)) |
| *(regp + CXT_CAUSE) = *(greg_t *) & deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->cause)]; |
| |
| if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->hi)) |
| *(regp + CXT_MDHI) = *(greg_t *) & deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->hi)]; |
| |
| if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->lo)) |
| *(regp + CXT_MDLO) = *(greg_t *) & deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->lo)]; |
| } |
| |
| /* |
| * 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 (fpregset_t *fpregsetp) |
| { |
| int regi; |
| char zerobuf[MAX_REGISTER_SIZE]; |
| memset (zerobuf, 0, MAX_REGISTER_SIZE); |
| |
| for (regi = 0; regi < 32; regi++) |
| regcache_raw_supply (current_regcache, |
| mips_regnum (current_gdbarch)->fp0 + regi, |
| (char *) &fpregsetp->fp_r.fp_regs[regi]); |
| |
| regcache_raw_supply (current_regcache, |
| mips_regnum (current_gdbarch)->fp_control_status, |
| (char *) &fpregsetp->fp_csr); |
| |
| /* FIXME: how can we supply FCRIR? The ABI doesn't tell us. */ |
| regcache_raw_supply (current_regcache, |
| mips_regnum (current_gdbarch)->fp_implementation_revision, |
| zerobuf); |
| } |
| |
| void |
| fill_fpregset (fpregset_t *fpregsetp, int regno) |
| { |
| int regi; |
| char *from, *to; |
| |
| for (regi = mips_regnum (current_gdbarch)->fp0; |
| regi < mips_regnum (current_gdbarch)->fp0 + 32; regi++) |
| { |
| if ((regno == -1) || (regno == regi)) |
| { |
| from = (char *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (regi)]; |
| to = (char *) &(fpregsetp->fp_r.fp_regs[regi - mips_regnum (current_gdbarch)->fp0]); |
| memcpy (to, from, register_size (current_gdbarch, regi)); |
| } |
| } |
| |
| if ((regno == -1) |
| || (regno == mips_regnum (current_gdbarch)->fp_control_status)) |
| fpregsetp->fp_csr = *(unsigned *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)]; |
| } |
| |
| |
| /* 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 (MIPS_A0_REGNUM); |
| |
| if (target_read_memory (jb_addr + _JB_PC * JB_ELEMENT_SIZE, buf, |
| TARGET_PTR_BIT / TARGET_CHAR_BIT)) |
| return 0; |
| |
| *pc = extract_unsigned_integer (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT); |
| |
| return 1; |
| } |