1 /* <proc_service.h> implementation. 2 3 Copyright (C) 1999-2023 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 22 #include "gdbcore.h" 23 #include "inferior.h" 24 #include "gdbthread.h" 25 #include "symtab.h" 26 #include "target.h" 27 #include "regcache.h" 28 #include "objfiles.h" 29 30 #include "gdb_proc_service.h" 31 32 #include <sys/procfs.h> 33 34 /* Prototypes for supply_gregset etc. */ 35 #include "gregset.h" 36 37 38 /* Helper functions. */ 39 40 /* Convert a psaddr_t to a CORE_ADDR. */ 41 42 static CORE_ADDR 43 ps_addr_to_core_addr (psaddr_t addr) 44 { 45 if (current_program_space->exec_bfd () 46 && bfd_get_sign_extend_vma (current_program_space->exec_bfd ())) 47 return (intptr_t) addr; 48 else 49 return (uintptr_t) addr; 50 } 51 52 /* Convert a CORE_ADDR to a psaddr_t. */ 53 54 static psaddr_t 55 core_addr_to_ps_addr (CORE_ADDR addr) 56 { 57 if (current_program_space->exec_bfd () 58 && bfd_get_sign_extend_vma (current_program_space->exec_bfd ())) 59 return (psaddr_t) (intptr_t) addr; 60 else 61 return (psaddr_t) (uintptr_t) addr; 62 } 63 64 /* Transfer LEN bytes of memory between BUF and address ADDR in the 65 process specified by PH. If WRITE, transfer them to the process, 66 else transfer them from the process. Returns PS_OK for success, 67 PS_ERR on failure. 68 69 This is a helper function for ps_pdread and ps_pdwrite. */ 70 71 static ps_err_e 72 ps_xfer_memory (const struct ps_prochandle *ph, psaddr_t addr, 73 gdb_byte *buf, size_t len, int write) 74 { 75 scoped_restore_current_inferior restore_inferior; 76 set_current_inferior (ph->thread->inf); 77 78 scoped_restore_current_program_space restore_current_progspace; 79 set_current_program_space (ph->thread->inf->pspace); 80 81 scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); 82 inferior_ptid = ph->thread->ptid; 83 84 CORE_ADDR core_addr = ps_addr_to_core_addr (addr); 85 86 int ret; 87 if (write) 88 ret = target_write_memory (core_addr, buf, len); 89 else 90 ret = target_read_memory (core_addr, buf, len); 91 return (ret == 0 ? PS_OK : PS_ERR); 92 } 93 94 95 /* Search for the symbol named NAME within the object named OBJ within 96 the target process PH. If the symbol is found the address of the 97 symbol is stored in SYM_ADDR. */ 98 99 ps_err_e 100 ps_pglobal_lookup (struct ps_prochandle *ph, const char *obj, 101 const char *name, psaddr_t *sym_addr) 102 { 103 inferior *inf = ph->thread->inf; 104 105 scoped_restore_current_program_space restore_pspace; 106 107 set_current_program_space (inf->pspace); 108 109 /* FIXME: kettenis/2000-09-03: What should we do with OBJ? */ 110 bound_minimal_symbol ms = lookup_minimal_symbol (name, NULL, NULL); 111 if (ms.minsym == NULL) 112 return PS_NOSYM; 113 114 *sym_addr = core_addr_to_ps_addr (ms.value_address ()); 115 return PS_OK; 116 } 117 118 /* Read SIZE bytes from the target process PH at address ADDR and copy 119 them into BUF. */ 120 121 ps_err_e 122 ps_pdread (struct ps_prochandle *ph, psaddr_t addr, void *buf, size_t size) 123 { 124 return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 0); 125 } 126 127 /* Write SIZE bytes from BUF into the target process PH at address ADDR. */ 128 129 ps_err_e 130 ps_pdwrite (struct ps_prochandle *ph, psaddr_t addr, 131 const void *buf, size_t size) 132 { 133 return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 1); 134 } 135 136 /* Get a regcache for LWPID using its inferior's "main" architecture, 137 which is the register set libthread_db expects to be using. In 138 multi-arch debugging scenarios, the thread's architecture may 139 differ from the inferior's "main" architecture. */ 140 141 static struct regcache * 142 get_ps_regcache (struct ps_prochandle *ph, lwpid_t lwpid) 143 { 144 inferior *inf = ph->thread->inf; 145 return get_thread_arch_regcache (inf->process_target (), 146 ptid_t (inf->pid, lwpid), 147 inf->gdbarch); 148 } 149 150 /* Get the general registers of LWP LWPID within the target process PH 151 and store them in GREGSET. */ 152 153 ps_err_e 154 ps_lgetregs (struct ps_prochandle *ph, lwpid_t lwpid, prgregset_t gregset) 155 { 156 struct regcache *regcache = get_ps_regcache (ph, lwpid); 157 158 target_fetch_registers (regcache, -1); 159 fill_gregset (regcache, (gdb_gregset_t *) gregset, -1); 160 161 return PS_OK; 162 } 163 164 /* Set the general registers of LWP LWPID within the target process PH 165 from GREGSET. */ 166 167 ps_err_e 168 ps_lsetregs (struct ps_prochandle *ph, lwpid_t lwpid, const prgregset_t gregset) 169 { 170 struct regcache *regcache = get_ps_regcache (ph, lwpid); 171 172 supply_gregset (regcache, (const gdb_gregset_t *) gregset); 173 target_store_registers (regcache, -1); 174 175 return PS_OK; 176 } 177 178 /* Get the floating-point registers of LWP LWPID within the target 179 process PH and store them in FPREGSET. */ 180 181 ps_err_e 182 ps_lgetfpregs (struct ps_prochandle *ph, lwpid_t lwpid, 183 prfpregset_t *fpregset) 184 { 185 struct regcache *regcache = get_ps_regcache (ph, lwpid); 186 187 target_fetch_registers (regcache, -1); 188 fill_fpregset (regcache, (gdb_fpregset_t *) fpregset, -1); 189 190 return PS_OK; 191 } 192 193 /* Set the floating-point registers of LWP LWPID within the target 194 process PH from FPREGSET. */ 195 196 ps_err_e 197 ps_lsetfpregs (struct ps_prochandle *ph, lwpid_t lwpid, 198 const prfpregset_t *fpregset) 199 { 200 struct regcache *regcache = get_ps_regcache (ph, lwpid); 201 202 supply_fpregset (regcache, (const gdb_fpregset_t *) fpregset); 203 target_store_registers (regcache, -1); 204 205 return PS_OK; 206 } 207 208 /* Return overall process id of the target PH. Special for GNU/Linux 209 -- not used on Solaris. */ 210 211 pid_t 212 ps_getpid (struct ps_prochandle *ph) 213 { 214 return ph->thread->ptid.pid (); 215 } 216 217 void _initialize_proc_service (); 218 void 219 _initialize_proc_service () 220 { 221 /* This function solely exists to make sure this module is linked 222 into the final binary. */ 223 } 224