| /* Native support for the SGI Iris running IRIX version 5, for GDB. |
| |
| Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, |
| 1998, 1999, 2000, 2001, 2002, 2004 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. |
| Modified for Irix 5.x by Ian Lance Taylor. |
| |
| 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 "gdb_string.h" |
| #include <sys/time.h> |
| #include <sys/procfs.h> |
| #include <setjmp.h> /* For JB_XXX. */ |
| |
| /* Prototypes for supply_gregset etc. */ |
| #include "gregset.h" |
| #include "mips-tdep.h" |
| |
| static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR); |
| |
| /* 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]; |
| int gregoff = sizeof (greg_t) - mips_isa_regsize (current_gdbarch); |
| static char zerobuf[32] = {0}; |
| |
| for (regi = 0; regi <= CTX_RA; regi++) |
| regcache_raw_supply (current_regcache, regi, |
| (char *) (regp + regi) + gregoff); |
| |
| regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->pc, |
| (char *) (regp + CTX_EPC) + gregoff); |
| regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->hi, |
| (char *) (regp + CTX_MDHI) + gregoff); |
| regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->lo, |
| (char *) (regp + CTX_MDLO) + gregoff); |
| regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->cause, |
| (char *) (regp + CTX_CAUSE) + gregoff); |
| |
| /* Fill inaccessible registers with zero. */ |
| regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->badvaddr, zerobuf); |
| } |
| |
| void |
| fill_gregset (gregset_t *gregsetp, int regno) |
| { |
| int regi; |
| greg_t *regp = &(*gregsetp)[0]; |
| LONGEST regval; |
| |
| /* Under Irix6, if GDB is built with N32 ABI and is debugging an O32 |
| executable, we have to sign extend the registers to 64 bits before |
| filling in the gregset structure. */ |
| |
| for (regi = 0; regi <= CTX_RA; regi++) |
| if ((regno == -1) || (regno == regi)) |
| { |
| regcache_raw_read_signed (current_regcache, regi, ®val); |
| *(regp + regi) = regval; |
| } |
| |
| if ((regno == -1) || (regno == PC_REGNUM)) |
| { |
| regcache_raw_read_signed |
| (current_regcache, mips_regnum (current_gdbarch)->pc, ®val); |
| *(regp + CTX_EPC) = regval; |
| } |
| |
| if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->cause)) |
| { |
| regcache_raw_read_signed |
| (current_regcache, mips_regnum (current_gdbarch)->cause, ®val); |
| *(regp + CTX_CAUSE) = regval; |
| } |
| |
| if ((regno == -1) |
| || (regno == mips_regnum (current_gdbarch)->hi)) |
| { |
| regcache_raw_read_signed |
| (current_regcache, mips_regnum (current_gdbarch)->hi, ®val); |
| *(regp + CTX_MDHI) = regval; |
| } |
| |
| if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->lo)) |
| { |
| regcache_raw_read_signed |
| (current_regcache, mips_regnum (current_gdbarch)->lo, ®val); |
| *(regp + CTX_MDLO) = regval; |
| } |
| } |
| |
| /* |
| * 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; |
| static char zerobuf[32] = {0}; |
| char fsrbuf[8]; |
| |
| /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */ |
| |
| for (regi = 0; regi < 32; regi++) |
| regcache_raw_supply (current_regcache, FP0_REGNUM + regi, |
| (char *) &fpregsetp->fp_r.fp_regs[regi]); |
| |
| /* We can't supply the FSR register directly to the regcache, |
| because there is a size issue: On one hand, fpregsetp->fp_csr |
| is 32bits long, while the regcache expects a 64bits long value. |
| So we use a buffer of the correct size and copy into it the register |
| value at the proper location. */ |
| memset (fsrbuf, 0, 4); |
| memcpy (fsrbuf + 4, &fpregsetp->fp_csr, 4); |
| |
| regcache_raw_supply (current_regcache, |
| mips_regnum (current_gdbarch)->fp_control_status, |
| fsrbuf); |
| |
| /* FIXME: how can we supply FCRIR? SGI 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; |
| |
| /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */ |
| |
| for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++) |
| { |
| if ((regno == -1) || (regno == regi)) |
| { |
| to = (char *) &(fpregsetp->fp_r.fp_regs[regi - FP0_REGNUM]); |
| regcache_raw_read (current_regcache, regi, to); |
| } |
| } |
| |
| if (regno == -1 |
| || regno == mips_regnum (current_gdbarch)->fp_control_status) |
| { |
| char fsrbuf[8]; |
| |
| /* We can't fill the FSR register directly from the regcache, |
| because there is a size issue: On one hand, fpregsetp->fp_csr |
| is 32bits long, while the regcache expects a 64bits long buffer. |
| So we use a buffer of the correct size and copy the register |
| value from that buffer. */ |
| regcache_raw_read (current_regcache, |
| mips_regnum (current_gdbarch)->fp_control_status, |
| fsrbuf); |
| |
| memcpy (&fpregsetp->fp_csr, fsrbuf + 4, 4); |
| } |
| } |
| |
| |
| /* 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; |
| } |
| |
| /* 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 5, 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) |
| { |
| char *srcp = core_reg_sect; |
| int regno; |
| |
| if (core_reg_size == deprecated_register_bytes ()) |
| { |
| for (regno = 0; regno < NUM_REGS; regno++) |
| { |
| regcache_raw_write (current_regcache, regno, srcp); |
| srcp += register_size (current_gdbarch, regno); |
| } |
| } |
| else if (mips_isa_regsize (current_gdbarch) == 4 && |
| core_reg_size == (2 * mips_isa_regsize (current_gdbarch)) * NUM_REGS) |
| { |
| /* This is a core file from a N32 executable, 64 bits are saved |
| for all registers. */ |
| for (regno = 0; regno < NUM_REGS; regno++) |
| { |
| if (regno >= FP0_REGNUM && regno < (FP0_REGNUM + 32)) |
| { |
| regcache_raw_write (current_regcache, regno, srcp); |
| } |
| else |
| { |
| regcache_raw_write (current_regcache, regno, srcp + 4); |
| } |
| srcp += 8; |
| } |
| } |
| else |
| { |
| warning (_("wrong size gregset struct in core file")); |
| return; |
| } |
| } |
| |
| /* Register that we are able to handle irix5 core file formats. |
| This really is bfd_target_unknown_flavour */ |
| |
| static struct core_fns irix5_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_irix5 (void) |
| { |
| deprecated_add_core_fns (&irix5_core_fns); |
| } |