| 1 | /* Copyright (C) 2009-2020 Free Software Foundation, Inc. |
| 2 | |
| 3 | This file is part of GDB. |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 3 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include "server.h" |
| 19 | #include "lynx-low.h" |
| 20 | #include <limits.h> |
| 21 | #include <sys/ptrace.h> |
| 22 | |
| 23 | /* The following two typedefs are defined in a .h file which is not |
| 24 | in the standard include path (/sys/include/family/ppc/ucontext.h), |
| 25 | so we just duplicate them here. */ |
| 26 | |
| 27 | /* General register context */ |
| 28 | typedef struct usr_econtext_s |
| 29 | { |
| 30 | uint32_t uec_iregs[32]; |
| 31 | uint32_t uec_inum; |
| 32 | uint32_t uec_srr0; |
| 33 | uint32_t uec_srr1; |
| 34 | uint32_t uec_lr; |
| 35 | uint32_t uec_ctr; |
| 36 | uint32_t uec_cr; |
| 37 | uint32_t uec_xer; |
| 38 | uint32_t uec_dar; |
| 39 | uint32_t uec_mq; |
| 40 | uint32_t uec_msr; |
| 41 | uint32_t uec_sregs[16]; |
| 42 | uint32_t uec_ss_count; |
| 43 | uint32_t uec_ss_addr1; |
| 44 | uint32_t uec_ss_addr2; |
| 45 | uint32_t uec_ss_code1; |
| 46 | uint32_t uec_ss_code2; |
| 47 | } usr_econtext_t; |
| 48 | |
| 49 | /* Floating point register context */ |
| 50 | typedef struct usr_fcontext_s |
| 51 | { |
| 52 | uint64_t ufc_freg[32]; |
| 53 | uint32_t ufc_fpscr[2]; |
| 54 | } usr_fcontext_t; |
| 55 | |
| 56 | /* Index of for various registers inside the regcache. */ |
| 57 | #define R0_REGNUM 0 |
| 58 | #define F0_REGNUM 32 |
| 59 | #define PC_REGNUM 64 |
| 60 | #define MSR_REGNUM 65 |
| 61 | #define CR_REGNUM 66 |
| 62 | #define LR_REGNUM 67 |
| 63 | #define CTR_REGNUM 68 |
| 64 | #define XER_REGNUM 69 |
| 65 | #define FPSCR_REGNUM 70 |
| 66 | |
| 67 | /* Defined in auto-generated file powerpc-32.c. */ |
| 68 | extern void init_registers_powerpc_32 (void); |
| 69 | extern const struct target_desc *tdesc_powerpc_32; |
| 70 | |
| 71 | /* The fill_function for the general-purpose register set. */ |
| 72 | |
| 73 | static void |
| 74 | lynx_ppc_fill_gregset (struct regcache *regcache, char *buf) |
| 75 | { |
| 76 | int i; |
| 77 | |
| 78 | /* r0 - r31 */ |
| 79 | for (i = 0; i < 32; i++) |
| 80 | collect_register (regcache, R0_REGNUM + i, |
| 81 | buf + offsetof (usr_econtext_t, uec_iregs[i])); |
| 82 | |
| 83 | /* The other registers provided in the GP register context. */ |
| 84 | collect_register (regcache, PC_REGNUM, |
| 85 | buf + offsetof (usr_econtext_t, uec_srr0)); |
| 86 | collect_register (regcache, MSR_REGNUM, |
| 87 | buf + offsetof (usr_econtext_t, uec_srr1)); |
| 88 | collect_register (regcache, CR_REGNUM, |
| 89 | buf + offsetof (usr_econtext_t, uec_cr)); |
| 90 | collect_register (regcache, LR_REGNUM, |
| 91 | buf + offsetof (usr_econtext_t, uec_lr)); |
| 92 | collect_register (regcache, CTR_REGNUM, |
| 93 | buf + offsetof (usr_econtext_t, uec_ctr)); |
| 94 | collect_register (regcache, XER_REGNUM, |
| 95 | buf + offsetof (usr_econtext_t, uec_xer)); |
| 96 | } |
| 97 | |
| 98 | /* The store_function for the general-purpose register set. */ |
| 99 | |
| 100 | static void |
| 101 | lynx_ppc_store_gregset (struct regcache *regcache, const char *buf) |
| 102 | { |
| 103 | int i; |
| 104 | |
| 105 | /* r0 - r31 */ |
| 106 | for (i = 0; i < 32; i++) |
| 107 | supply_register (regcache, R0_REGNUM + i, |
| 108 | buf + offsetof (usr_econtext_t, uec_iregs[i])); |
| 109 | |
| 110 | /* The other registers provided in the GP register context. */ |
| 111 | supply_register (regcache, PC_REGNUM, |
| 112 | buf + offsetof (usr_econtext_t, uec_srr0)); |
| 113 | supply_register (regcache, MSR_REGNUM, |
| 114 | buf + offsetof (usr_econtext_t, uec_srr1)); |
| 115 | supply_register (regcache, CR_REGNUM, |
| 116 | buf + offsetof (usr_econtext_t, uec_cr)); |
| 117 | supply_register (regcache, LR_REGNUM, |
| 118 | buf + offsetof (usr_econtext_t, uec_lr)); |
| 119 | supply_register (regcache, CTR_REGNUM, |
| 120 | buf + offsetof (usr_econtext_t, uec_ctr)); |
| 121 | supply_register (regcache, XER_REGNUM, |
| 122 | buf + offsetof (usr_econtext_t, uec_xer)); |
| 123 | } |
| 124 | |
| 125 | /* The fill_function for the floating-point register set. */ |
| 126 | |
| 127 | static void |
| 128 | lynx_ppc_fill_fpregset (struct regcache *regcache, char *buf) |
| 129 | { |
| 130 | int i; |
| 131 | |
| 132 | /* f0 - f31 */ |
| 133 | for (i = 0; i < 32; i++) |
| 134 | collect_register (regcache, F0_REGNUM + i, |
| 135 | buf + offsetof (usr_fcontext_t, ufc_freg[i])); |
| 136 | |
| 137 | /* fpscr */ |
| 138 | collect_register (regcache, FPSCR_REGNUM, |
| 139 | buf + offsetof (usr_fcontext_t, ufc_fpscr)); |
| 140 | } |
| 141 | |
| 142 | /* The store_function for the floating-point register set. */ |
| 143 | |
| 144 | static void |
| 145 | lynx_ppc_store_fpregset (struct regcache *regcache, const char *buf) |
| 146 | { |
| 147 | int i; |
| 148 | |
| 149 | /* f0 - f31 */ |
| 150 | for (i = 0; i < 32; i++) |
| 151 | supply_register (regcache, F0_REGNUM + i, |
| 152 | buf + offsetof (usr_fcontext_t, ufc_freg[i])); |
| 153 | |
| 154 | /* fpscr */ |
| 155 | supply_register (regcache, FPSCR_REGNUM, |
| 156 | buf + offsetof (usr_fcontext_t, ufc_fpscr)); |
| 157 | } |
| 158 | |
| 159 | /* Implements the lynx_target_ops.arch_setup routine. */ |
| 160 | |
| 161 | static void |
| 162 | lynx_ppc_arch_setup (void) |
| 163 | { |
| 164 | init_registers_powerpc_32 (); |
| 165 | lynx_tdesc = tdesc_powerpc_32; |
| 166 | } |
| 167 | |
| 168 | /* Description of all the powerpc-lynx register sets. */ |
| 169 | |
| 170 | struct lynx_regset_info lynx_target_regsets[] = { |
| 171 | /* General Purpose Registers. */ |
| 172 | {PTRACE_GETREGS, PTRACE_SETREGS, sizeof(usr_econtext_t), |
| 173 | lynx_ppc_fill_gregset, lynx_ppc_store_gregset}, |
| 174 | /* Floating Point Registers. */ |
| 175 | { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof(usr_fcontext_t), |
| 176 | lynx_ppc_fill_fpregset, lynx_ppc_store_fpregset }, |
| 177 | /* End of list marker. */ |
| 178 | {0, 0, -1, NULL, NULL } |
| 179 | }; |
| 180 | |
| 181 | /* The lynx_target_ops vector for powerpc-lynxos. */ |
| 182 | |
| 183 | struct lynx_target_ops the_low_target = { |
| 184 | lynx_ppc_arch_setup, |
| 185 | }; |