| 1 | /* Native-dependent code for Solaris x86. |
| 2 | |
| 3 | Copyright (C) 1988-2020 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "regcache.h" |
| 22 | |
| 23 | #include <sys/reg.h> |
| 24 | #include <sys/procfs.h> |
| 25 | #include "gregset.h" |
| 26 | #include "target.h" |
| 27 | #include "procfs.h" |
| 28 | |
| 29 | /* This file provids the (temporary) glue between the Solaris x86 |
| 30 | target dependent code and the machine independent SVR4 /proc |
| 31 | support. */ |
| 32 | |
| 33 | /* Solaris 10 (Solaris 2.10, SunOS 5.10) and up support two process |
| 34 | data models, the traditional 32-bit data model (ILP32) and the |
| 35 | 64-bit data model (LP64). The format of /proc depends on the data |
| 36 | model of the observer (the controlling process, GDB in our case). |
| 37 | The Solaris header files conveniently define PR_MODEL_NATIVE to the |
| 38 | data model of the controlling process. If its value is |
| 39 | PR_MODEL_LP64, we know that GDB is being compiled as a 64-bit |
| 40 | program. |
| 41 | |
| 42 | Note that a 32-bit GDB won't be able to debug a 64-bit target |
| 43 | process using /proc on Solaris. */ |
| 44 | |
| 45 | #if PR_MODEL_NATIVE == PR_MODEL_LP64 |
| 46 | |
| 47 | #include "amd64-nat.h" |
| 48 | #include "amd64-tdep.h" |
| 49 | |
| 50 | /* Mapping between the general-purpose registers in gregset_t format |
| 51 | and GDB's register cache layout. */ |
| 52 | |
| 53 | /* From <sys/regset.h>. */ |
| 54 | static int amd64_sol2_gregset64_reg_offset[] = { |
| 55 | 14 * 8, /* %rax */ |
| 56 | 11 * 8, /* %rbx */ |
| 57 | 13 * 8, /* %rcx */ |
| 58 | 12 * 8, /* %rdx */ |
| 59 | 9 * 8, /* %rsi */ |
| 60 | 8 * 8, /* %rdi */ |
| 61 | 10 * 8, /* %rbp */ |
| 62 | 20 * 8, /* %rsp */ |
| 63 | 7 * 8, /* %r8 ... */ |
| 64 | 6 * 8, |
| 65 | 5 * 8, |
| 66 | 4 * 8, |
| 67 | 3 * 8, |
| 68 | 2 * 8, |
| 69 | 1 * 8, |
| 70 | 0 * 8, /* ... %r15 */ |
| 71 | 17 * 8, /* %rip */ |
| 72 | 19 * 8, /* %eflags */ |
| 73 | 18 * 8, /* %cs */ |
| 74 | 21 * 8, /* %ss */ |
| 75 | 25 * 8, /* %ds */ |
| 76 | 24 * 8, /* %es */ |
| 77 | 22 * 8, /* %fs */ |
| 78 | 23 * 8 /* %gs */ |
| 79 | }; |
| 80 | |
| 81 | /* 32-bit registers are provided by Solaris in 64-bit format, so just |
| 82 | give a subset of the list above. */ |
| 83 | static int amd64_sol2_gregset32_reg_offset[] = { |
| 84 | 14 * 8, /* %eax */ |
| 85 | 13 * 8, /* %ecx */ |
| 86 | 12 * 8, /* %edx */ |
| 87 | 11 * 8, /* %ebx */ |
| 88 | 20 * 8, /* %esp */ |
| 89 | 10 * 8, /* %ebp */ |
| 90 | 9 * 8, /* %esi */ |
| 91 | 8 * 8, /* %edi */ |
| 92 | 17 * 8, /* %eip */ |
| 93 | 19 * 8, /* %eflags */ |
| 94 | 18 * 8, /* %cs */ |
| 95 | 21 * 8, /* %ss */ |
| 96 | 25 * 8, /* %ds */ |
| 97 | 24 * 8, /* %es */ |
| 98 | 22 * 8, /* %fs */ |
| 99 | 23 * 8 /* %gs */ |
| 100 | }; |
| 101 | |
| 102 | void |
| 103 | supply_gregset (struct regcache *regcache, const prgregset_t *gregs) |
| 104 | { |
| 105 | amd64_supply_native_gregset (regcache, gregs, -1); |
| 106 | } |
| 107 | |
| 108 | void |
| 109 | supply_fpregset (struct regcache *regcache, const prfpregset_t *fpregs) |
| 110 | { |
| 111 | amd64_supply_fxsave (regcache, -1, fpregs); |
| 112 | } |
| 113 | |
| 114 | void |
| 115 | fill_gregset (const struct regcache *regcache, |
| 116 | prgregset_t *gregs, int regnum) |
| 117 | { |
| 118 | amd64_collect_native_gregset (regcache, gregs, regnum); |
| 119 | } |
| 120 | |
| 121 | void |
| 122 | fill_fpregset (const struct regcache *regcache, |
| 123 | prfpregset_t *fpregs, int regnum) |
| 124 | { |
| 125 | amd64_collect_fxsave (regcache, regnum, fpregs); |
| 126 | } |
| 127 | |
| 128 | #else /* PR_MODEL_NATIVE != PR_MODEL_LP64 */ |
| 129 | |
| 130 | #include "i386-tdep.h" |
| 131 | #include "i387-tdep.h" |
| 132 | |
| 133 | /* The `/proc' interface divides the target machine's register set up |
| 134 | into two different sets, the general purpose register set (gregset) |
| 135 | and the floating-point register set (fpregset). |
| 136 | |
| 137 | The actual structure is, of course, naturally machine dependent, and is |
| 138 | different for each set of registers. For the i386 for example, the |
| 139 | general-purpose register set is typically defined by: |
| 140 | |
| 141 | typedef int gregset_t[19]; (in <sys/regset.h>) |
| 142 | |
| 143 | #define GS 0 (in <sys/reg.h>) |
| 144 | #define FS 1 |
| 145 | ... |
| 146 | #define UESP 17 |
| 147 | #define SS 18 |
| 148 | |
| 149 | and the floating-point set by: |
| 150 | |
| 151 | typedef struct fpregset { |
| 152 | union { |
| 153 | struct fpchip_state // fp extension state // |
| 154 | { |
| 155 | int state[27]; // 287/387 saved state // |
| 156 | int status; // status word saved at // |
| 157 | // exception // |
| 158 | } fpchip_state; |
| 159 | struct fp_emul_space // for emulators // |
| 160 | { |
| 161 | char fp_emul[246]; |
| 162 | char fp_epad[2]; |
| 163 | } fp_emul_space; |
| 164 | int f_fpregs[62]; // union of the above // |
| 165 | } fp_reg_set; |
| 166 | long f_wregs[33]; // saved weitek state // |
| 167 | } fpregset_t; |
| 168 | |
| 169 | Incidentally fpchip_state contains the FPU state in the same format |
| 170 | as used by the "fsave" instruction, and that's the only thing we |
| 171 | support here. I don't know how the emulator stores it state. The |
| 172 | Weitek stuff definitely isn't supported. |
| 173 | |
| 174 | The routines defined here, provide the packing and unpacking of |
| 175 | gregset_t and fpregset_t formatted data. */ |
| 176 | |
| 177 | /* Mapping between the general-purpose registers in `/proc' |
| 178 | format and GDB's register array layout. */ |
| 179 | static int regmap[] = |
| 180 | { |
| 181 | EAX, ECX, EDX, EBX, |
| 182 | UESP, EBP, ESI, EDI, |
| 183 | EIP, EFL, CS, SS, |
| 184 | DS, ES, FS, GS |
| 185 | }; |
| 186 | |
| 187 | /* Fill GDB's register array with the general-purpose register values |
| 188 | in *GREGSETP. */ |
| 189 | |
| 190 | void |
| 191 | supply_gregset (struct regcache *regcache, const gregset_t *gregsetp) |
| 192 | { |
| 193 | const greg_t *regp = (const greg_t *) gregsetp; |
| 194 | int regnum; |
| 195 | |
| 196 | for (regnum = 0; regnum < I386_NUM_GREGS; regnum++) |
| 197 | regcache->raw_supply (regnum, regp + regmap[regnum]); |
| 198 | } |
| 199 | |
| 200 | /* Fill register REGNUM (if it is a general-purpose register) in |
| 201 | *GREGSETPS with the value in GDB's register array. If REGNUM is -1, |
| 202 | do this for all registers. */ |
| 203 | |
| 204 | void |
| 205 | fill_gregset (const struct regcache *regcache, |
| 206 | gregset_t *gregsetp, int regnum) |
| 207 | { |
| 208 | greg_t *regp = (greg_t *) gregsetp; |
| 209 | int i; |
| 210 | |
| 211 | for (i = 0; i < I386_NUM_GREGS; i++) |
| 212 | if (regnum == -1 || regnum == i) |
| 213 | regcache->raw_collect (i, regp + regmap[i]); |
| 214 | } |
| 215 | |
| 216 | /* Fill GDB's register array with the floating-point register values in |
| 217 | *FPREGSETP. */ |
| 218 | |
| 219 | void |
| 220 | supply_fpregset (struct regcache *regcache, const fpregset_t *fpregsetp) |
| 221 | { |
| 222 | if (gdbarch_fp0_regnum (regcache->arch ()) == 0) |
| 223 | return; |
| 224 | |
| 225 | i387_supply_fsave (regcache, -1, fpregsetp); |
| 226 | } |
| 227 | |
| 228 | /* Fill register REGNO (if it is a floating-point register) in |
| 229 | *FPREGSETP with the value in GDB's register array. If REGNO is -1, |
| 230 | do this for all registers. */ |
| 231 | |
| 232 | void |
| 233 | fill_fpregset (const struct regcache *regcache, |
| 234 | fpregset_t *fpregsetp, int regno) |
| 235 | { |
| 236 | if (gdbarch_fp0_regnum (regcache->arch ()) == 0) |
| 237 | return; |
| 238 | |
| 239 | i387_collect_fsave (regcache, regno, fpregsetp); |
| 240 | } |
| 241 | |
| 242 | #endif |
| 243 | |
| 244 | void |
| 245 | _initialize_amd64_sol2_nat (void) |
| 246 | { |
| 247 | #if PR_MODEL_NATIVE == PR_MODEL_LP64 |
| 248 | amd64_native_gregset32_reg_offset = amd64_sol2_gregset32_reg_offset; |
| 249 | amd64_native_gregset32_num_regs = |
| 250 | ARRAY_SIZE (amd64_sol2_gregset32_reg_offset); |
| 251 | amd64_native_gregset64_reg_offset = amd64_sol2_gregset64_reg_offset; |
| 252 | amd64_native_gregset64_num_regs = |
| 253 | ARRAY_SIZE (amd64_sol2_gregset64_reg_offset); |
| 254 | #endif |
| 255 | } |