1 /* Native support for the SGI Iris running IRIX version 5, for GDB.
3 Copyright (C) 1988-1996, 1998-2002, 2004, 2006-2012 Free Software
6 Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU
7 and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin.
8 Implemented for Irix 4.x by Garrett A. Wollman.
9 Modified for Irix 5.x by Ian Lance Taylor.
11 This file is part of GDB.
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 3 of the License, or
16 (at your option) any later version.
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
23 You should have received a copy of the GNU General Public License
24 along with this program. If not, see <http://www.gnu.org/licenses/>. */
33 #include "gdb_string.h"
35 #include <sys/procfs.h>
36 #include <setjmp.h> /* For JB_XXX. */
38 /* Prototypes for supply_gregset etc. */
40 #include "mips-tdep.h"
42 static void fetch_core_registers (struct regcache *, char *,
43 unsigned int, int, CORE_ADDR);
47 * See the comment in m68k-tdep.c regarding the utility of these functions.
49 * These definitions are from the MIPS SVR4 ABI, so they may work for
50 * any MIPS SVR4 target.
54 supply_gregset (struct regcache *regcache, const gregset_t *gregsetp)
57 const greg_t *regp = &(*gregsetp)[0];
58 struct gdbarch *gdbarch = get_regcache_arch (regcache);
59 int gregoff = sizeof (greg_t) - mips_isa_regsize (gdbarch);
60 static char zerobuf[32] = {0};
62 for (regi = 0; regi <= CTX_RA; regi++)
63 regcache_raw_supply (regcache, regi,
64 (const char *) (regp + regi) + gregoff);
66 regcache_raw_supply (regcache, mips_regnum (gdbarch)->pc,
67 (const char *) (regp + CTX_EPC) + gregoff);
68 regcache_raw_supply (regcache, mips_regnum (gdbarch)->hi,
69 (const char *) (regp + CTX_MDHI) + gregoff);
70 regcache_raw_supply (regcache, mips_regnum (gdbarch)->lo,
71 (const char *) (regp + CTX_MDLO) + gregoff);
72 regcache_raw_supply (regcache, mips_regnum (gdbarch)->cause,
73 (const char *) (regp + CTX_CAUSE) + gregoff);
75 /* Fill inaccessible registers with zero. */
76 regcache_raw_supply (regcache, mips_regnum (gdbarch)->badvaddr, zerobuf);
80 fill_gregset (const struct regcache *regcache, gregset_t *gregsetp, int regno)
83 greg_t *regp = &(*gregsetp)[0];
84 gdb_byte buf[MAX_REGISTER_SIZE];
85 struct gdbarch *gdbarch = get_regcache_arch (regcache);
86 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
88 /* Under Irix6, if GDB is built with N32 ABI and is debugging an O32
89 executable, we have to sign extend the registers to 64 bits before
90 filling in the gregset structure. */
92 for (regi = 0; regi <= CTX_RA; regi++)
93 if ((regno == -1) || (regno == regi))
95 size = register_size (gdbarch, regi);
96 regcache_raw_collect (regcache, regi, buf);
97 *(regp + regi) = extract_signed_integer (buf, size, byte_order);
100 if ((regno == -1) || (regno == mips_regnum (gdbarch)->pc))
102 regi = mips_regnum (gdbarch)->pc;
103 size = register_size (gdbarch, regi);
104 regcache_raw_collect (regcache, regi, buf);
105 *(regp + CTX_EPC) = extract_signed_integer (buf, size, byte_order);
108 if ((regno == -1) || (regno == mips_regnum (gdbarch)->cause))
110 regi = mips_regnum (gdbarch)->cause;
111 size = register_size (gdbarch, regi);
112 regcache_raw_collect (regcache, regi, buf);
113 *(regp + CTX_CAUSE) = extract_signed_integer (buf, size, byte_order);
116 if ((regno == -1) || (regno == mips_regnum (gdbarch)->hi))
118 regi = mips_regnum (gdbarch)->hi;
119 size = register_size (gdbarch, regi);
120 regcache_raw_collect (regcache, regi, buf);
121 *(regp + CTX_MDHI) = extract_signed_integer (buf, size, byte_order);
124 if ((regno == -1) || (regno == mips_regnum (gdbarch)->lo))
126 regi = mips_regnum (gdbarch)->lo;
127 size = register_size (gdbarch, regi);
128 regcache_raw_collect (regcache, regi, buf);
129 *(regp + CTX_MDLO) = extract_signed_integer (buf, size, byte_order);
134 * Now we do the same thing for floating-point registers.
135 * We don't bother to condition on gdbarch_fp0_regnum since any
136 * reasonable MIPS configuration has an R3010 in it.
138 * Again, see the comments in m68k-tdep.c.
142 supply_fpregset (struct regcache *regcache, const fpregset_t *fpregsetp)
145 static char zerobuf[32] = {0};
147 struct gdbarch *gdbarch = get_regcache_arch (regcache);
149 /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
151 for (regi = 0; regi < 32; regi++)
152 regcache_raw_supply (regcache, gdbarch_fp0_regnum (gdbarch) + regi,
153 (const char *) &fpregsetp->__fp_r.__fp_regs[regi]);
155 /* We can't supply the FSR register directly to the regcache,
156 because there is a size issue: On one hand, fpregsetp->fp_csr
157 is 32bits long, while the regcache expects a 64bits long value.
158 So we use a buffer of the correct size and copy into it the register
159 value at the proper location. */
160 memset (fsrbuf, 0, 4);
161 memcpy (fsrbuf + 4, &fpregsetp->__fp_csr, 4);
163 regcache_raw_supply (regcache,
164 mips_regnum (gdbarch)->fp_control_status, fsrbuf);
166 /* FIXME: how can we supply FCRIR? SGI doesn't tell us. */
167 regcache_raw_supply (regcache,
168 mips_regnum (gdbarch)->fp_implementation_revision,
173 fill_fpregset (const struct regcache *regcache,
174 fpregset_t *fpregsetp, int regno)
178 struct gdbarch *gdbarch = get_regcache_arch (regcache);
180 /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
182 for (regi = gdbarch_fp0_regnum (gdbarch);
183 regi < gdbarch_fp0_regnum (gdbarch) + 32; regi++)
185 if ((regno == -1) || (regno == regi))
187 const int fp0_regnum = gdbarch_fp0_regnum (gdbarch);
189 to = (char *) &(fpregsetp->__fp_r.__fp_regs[regi - fp0_regnum]);
190 regcache_raw_collect (regcache, regi, to);
195 || regno == mips_regnum (gdbarch)->fp_control_status)
199 /* We can't fill the FSR register directly from the regcache,
200 because there is a size issue: On one hand, fpregsetp->fp_csr
201 is 32bits long, while the regcache expects a 64bits long buffer.
202 So we use a buffer of the correct size and copy the register
203 value from that buffer. */
204 regcache_raw_collect (regcache,
205 mips_regnum (gdbarch)->fp_control_status, fsrbuf);
207 memcpy (&fpregsetp->__fp_csr, fsrbuf + 4, 4);
212 /* Provide registers to GDB from a core file.
214 CORE_REG_SECT points to an array of bytes, which were obtained from
215 a core file which BFD thinks might contain register contents.
216 CORE_REG_SIZE is its size.
218 Normally, WHICH says which register set corelow suspects this is:
219 0 --- the general-purpose register set
220 2 --- the floating-point register set
221 However, for Irix 5, WHICH isn't used.
223 REG_ADDR is also unused. */
226 fetch_core_registers (struct regcache *regcache,
227 char *core_reg_sect, unsigned core_reg_size,
228 int which, CORE_ADDR reg_addr)
230 char *srcp = core_reg_sect;
231 struct gdbarch *gdbarch = get_regcache_arch (regcache);
232 int regsize = mips_isa_regsize (gdbarch);
235 /* If regsize is 8, this is a N32 or N64 core file.
236 If regsize is 4, this is an O32 core file. */
237 if (core_reg_size != regsize * gdbarch_num_regs (gdbarch))
239 warning (_("wrong size gregset struct in core file"));
243 for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
245 regcache_raw_supply (regcache, regno, srcp);
250 /* Register that we are able to handle irix5 core file formats.
251 This really is bfd_target_unknown_flavour. */
253 static struct core_fns irix5_core_fns =
255 bfd_target_unknown_flavour, /* core_flavour */
256 default_check_format, /* check_format */
257 default_core_sniffer, /* core_sniffer */
258 fetch_core_registers, /* core_read_registers */
262 /* Provide a prototype to silence -Wmissing-prototypes. */
263 extern initialize_file_ftype _initialize_irix5_nat;
266 _initialize_irix5_nat (void)
268 struct target_ops *t;
270 t = procfs_target ();
271 procfs_use_watchpoints (t);
274 deprecated_add_core_fns (&irix5_core_fns);