1 /* libthread_db helper functions for the remote server for GDB. 2 Copyright (C) 2002-2023 Free Software Foundation, Inc. 3 4 Contributed by MontaVista Software. 5 6 This file is part of GDB. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 20 21 #include "server.h" 22 23 /* This file is currently tied to GNU/Linux. It should scale well to 24 another libthread_db implementation, with the appropriate gdbserver 25 hooks, but for now this means we can use GNU/Linux's target data. */ 26 27 #include "linux-low.h" 28 29 #include "gdb_proc_service.h" 30 31 typedef struct ps_prochandle *gdb_ps_prochandle_t; 32 typedef void *gdb_ps_read_buf_t; 33 typedef const void *gdb_ps_write_buf_t; 34 typedef size_t gdb_ps_size_t; 35 36 #ifdef HAVE_LINUX_REGSETS 37 #define HAVE_REGSETS 38 #endif 39 40 #ifdef HAVE_REGSETS 41 static struct regset_info * 42 gregset_info (void) 43 { 44 int i = 0; 45 const regs_info *regs_info = the_linux_target->get_regs_info (); 46 struct regsets_info *regsets_info = regs_info->regsets_info; 47 48 while (regsets_info->regsets[i].size != -1) 49 { 50 if (regsets_info->regsets[i].type == GENERAL_REGS) 51 break; 52 i++; 53 } 54 55 return ®sets_info->regsets[i]; 56 } 57 #endif 58 59 /* Search for the symbol named NAME within the object named OBJ within 60 the target process PH. If the symbol is found the address of the 61 symbol is stored in SYM_ADDR. */ 62 63 ps_err_e 64 ps_pglobal_lookup (gdb_ps_prochandle_t ph, const char *obj, 65 const char *name, psaddr_t *sym_addr) 66 { 67 CORE_ADDR addr; 68 69 if (thread_db_look_up_one_symbol (name, &addr) == 0) 70 return PS_NOSYM; 71 72 *sym_addr = (psaddr_t) (unsigned long) addr; 73 return PS_OK; 74 } 75 76 /* Read SIZE bytes from the target process PH at address ADDR and copy 77 them into BUF. */ 78 79 ps_err_e 80 ps_pdread (gdb_ps_prochandle_t ph, psaddr_t addr, 81 gdb_ps_read_buf_t buf, gdb_ps_size_t size) 82 { 83 if (read_inferior_memory ((uintptr_t) addr, (gdb_byte *) buf, size) != 0) 84 return PS_ERR; 85 return PS_OK; 86 } 87 88 /* Write SIZE bytes from BUF into the target process PH at address ADDR. */ 89 90 ps_err_e 91 ps_pdwrite (gdb_ps_prochandle_t ph, psaddr_t addr, 92 gdb_ps_write_buf_t buf, gdb_ps_size_t size) 93 { 94 if (target_write_memory ((uintptr_t) addr, (const gdb_byte *) buf, size) 95 != 0) 96 return PS_ERR; 97 return PS_OK; 98 } 99 100 /* Get the general registers of LWP LWPID within the target process PH 101 and store them in GREGSET. */ 102 103 ps_err_e 104 ps_lgetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prgregset_t gregset) 105 { 106 #ifdef HAVE_REGSETS 107 struct lwp_info *lwp; 108 struct regcache *regcache; 109 110 lwp = find_lwp_pid (ptid_t (lwpid)); 111 if (lwp == NULL) 112 return PS_ERR; 113 114 scoped_restore_current_thread restore_thread; 115 switch_to_thread (get_lwp_thread (lwp)); 116 regcache = get_thread_regcache (current_thread, 1); 117 gregset_info ()->fill_function (regcache, gregset); 118 119 return PS_OK; 120 #else 121 return PS_ERR; 122 #endif 123 } 124 125 /* Set the general registers of LWP LWPID within the target process PH 126 from GREGSET. */ 127 128 ps_err_e 129 ps_lsetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prgregset_t gregset) 130 { 131 /* Unneeded. */ 132 return PS_ERR; 133 } 134 135 /* Get the floating-point registers of LWP LWPID within the target 136 process PH and store them in FPREGSET. */ 137 138 ps_err_e 139 ps_lgetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prfpregset_t *fpregset) 140 { 141 /* Unneeded. */ 142 return PS_ERR; 143 } 144 145 /* Set the floating-point registers of LWP LWPID within the target 146 process PH from FPREGSET. */ 147 148 ps_err_e 149 ps_lsetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prfpregset_t *fpregset) 150 { 151 /* Unneeded. */ 152 return PS_ERR; 153 } 154 155 /* Return overall process id of the target PH. Special for GNU/Linux 156 -- not used on Solaris. */ 157 158 pid_t 159 ps_getpid (gdb_ps_prochandle_t ph) 160 { 161 return current_process ()->pid; 162 } 163