| 1 | /* <proc_service.h> implementation. |
| 2 | |
| 3 | Copyright (C) 1999-2019 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 | \f |
| 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 (exec_bfd && bfd_get_sign_extend_vma (exec_bfd)) |
| 46 | return (intptr_t) addr; |
| 47 | else |
| 48 | return (uintptr_t) addr; |
| 49 | } |
| 50 | |
| 51 | /* Convert a CORE_ADDR to a psaddr_t. */ |
| 52 | |
| 53 | static psaddr_t |
| 54 | core_addr_to_ps_addr (CORE_ADDR addr) |
| 55 | { |
| 56 | if (exec_bfd && bfd_get_sign_extend_vma (exec_bfd)) |
| 57 | return (psaddr_t) (intptr_t) addr; |
| 58 | else |
| 59 | return (psaddr_t) (uintptr_t) addr; |
| 60 | } |
| 61 | |
| 62 | /* Transfer LEN bytes of memory between BUF and address ADDR in the |
| 63 | process specified by PH. If WRITE, transfer them to the process, |
| 64 | else transfer them from the process. Returns PS_OK for success, |
| 65 | PS_ERR on failure. |
| 66 | |
| 67 | This is a helper function for ps_pdread and ps_pdwrite. */ |
| 68 | |
| 69 | static ps_err_e |
| 70 | ps_xfer_memory (const struct ps_prochandle *ph, psaddr_t addr, |
| 71 | gdb_byte *buf, size_t len, int write) |
| 72 | { |
| 73 | scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
| 74 | int ret; |
| 75 | CORE_ADDR core_addr = ps_addr_to_core_addr (addr); |
| 76 | |
| 77 | inferior_ptid = ph->thread->ptid; |
| 78 | |
| 79 | if (write) |
| 80 | ret = target_write_memory (core_addr, buf, len); |
| 81 | else |
| 82 | ret = target_read_memory (core_addr, buf, len); |
| 83 | |
| 84 | return (ret == 0 ? PS_OK : PS_ERR); |
| 85 | } |
| 86 | \f |
| 87 | |
| 88 | /* Search for the symbol named NAME within the object named OBJ within |
| 89 | the target process PH. If the symbol is found the address of the |
| 90 | symbol is stored in SYM_ADDR. */ |
| 91 | |
| 92 | ps_err_e |
| 93 | ps_pglobal_lookup (struct ps_prochandle *ph, const char *obj, |
| 94 | const char *name, psaddr_t *sym_addr) |
| 95 | { |
| 96 | inferior *inf = ph->thread->inf; |
| 97 | |
| 98 | scoped_restore_current_program_space restore_pspace; |
| 99 | |
| 100 | set_current_program_space (inf->pspace); |
| 101 | |
| 102 | /* FIXME: kettenis/2000-09-03: What should we do with OBJ? */ |
| 103 | bound_minimal_symbol ms = lookup_minimal_symbol (name, NULL, NULL); |
| 104 | if (ms.minsym == NULL) |
| 105 | return PS_NOSYM; |
| 106 | |
| 107 | *sym_addr = core_addr_to_ps_addr (BMSYMBOL_VALUE_ADDRESS (ms)); |
| 108 | return PS_OK; |
| 109 | } |
| 110 | |
| 111 | /* Read SIZE bytes from the target process PH at address ADDR and copy |
| 112 | them into BUF. */ |
| 113 | |
| 114 | ps_err_e |
| 115 | ps_pdread (struct ps_prochandle *ph, psaddr_t addr, void *buf, size_t size) |
| 116 | { |
| 117 | return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 0); |
| 118 | } |
| 119 | |
| 120 | /* Write SIZE bytes from BUF into the target process PH at address ADDR. */ |
| 121 | |
| 122 | ps_err_e |
| 123 | ps_pdwrite (struct ps_prochandle *ph, psaddr_t addr, |
| 124 | const void *buf, size_t size) |
| 125 | { |
| 126 | return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 1); |
| 127 | } |
| 128 | |
| 129 | /* Get a regcache for LWPID using its inferior's "main" architecture, |
| 130 | which is the register set libthread_db expects to be using. In |
| 131 | multi-arch debugging scenarios, the thread's architecture may |
| 132 | differ from the inferior's "main" architecture. E.g., in the Cell |
| 133 | combined debugger, if GDB happens to interrupt SPU code, the |
| 134 | thread's architecture is SPU, and the main architecture is |
| 135 | PowerPC. */ |
| 136 | |
| 137 | static struct regcache * |
| 138 | get_ps_regcache (struct ps_prochandle *ph, lwpid_t lwpid) |
| 139 | { |
| 140 | inferior *inf = ph->thread->inf; |
| 141 | return get_thread_arch_regcache (ptid_t (inf->pid, lwpid), inf->gdbarch); |
| 142 | } |
| 143 | |
| 144 | /* Get the general registers of LWP LWPID within the target process PH |
| 145 | and store them in GREGSET. */ |
| 146 | |
| 147 | ps_err_e |
| 148 | ps_lgetregs (struct ps_prochandle *ph, lwpid_t lwpid, prgregset_t gregset) |
| 149 | { |
| 150 | struct regcache *regcache = get_ps_regcache (ph, lwpid); |
| 151 | |
| 152 | target_fetch_registers (regcache, -1); |
| 153 | fill_gregset (regcache, (gdb_gregset_t *) gregset, -1); |
| 154 | |
| 155 | return PS_OK; |
| 156 | } |
| 157 | |
| 158 | /* Set the general registers of LWP LWPID within the target process PH |
| 159 | from GREGSET. */ |
| 160 | |
| 161 | ps_err_e |
| 162 | ps_lsetregs (struct ps_prochandle *ph, lwpid_t lwpid, const prgregset_t gregset) |
| 163 | { |
| 164 | struct regcache *regcache = get_ps_regcache (ph, lwpid); |
| 165 | |
| 166 | supply_gregset (regcache, (const gdb_gregset_t *) gregset); |
| 167 | target_store_registers (regcache, -1); |
| 168 | |
| 169 | return PS_OK; |
| 170 | } |
| 171 | |
| 172 | /* Get the floating-point registers of LWP LWPID within the target |
| 173 | process PH and store them in FPREGSET. */ |
| 174 | |
| 175 | ps_err_e |
| 176 | ps_lgetfpregs (struct ps_prochandle *ph, lwpid_t lwpid, |
| 177 | prfpregset_t *fpregset) |
| 178 | { |
| 179 | struct regcache *regcache = get_ps_regcache (ph, lwpid); |
| 180 | |
| 181 | target_fetch_registers (regcache, -1); |
| 182 | fill_fpregset (regcache, (gdb_fpregset_t *) fpregset, -1); |
| 183 | |
| 184 | return PS_OK; |
| 185 | } |
| 186 | |
| 187 | /* Set the floating-point registers of LWP LWPID within the target |
| 188 | process PH from FPREGSET. */ |
| 189 | |
| 190 | ps_err_e |
| 191 | ps_lsetfpregs (struct ps_prochandle *ph, lwpid_t lwpid, |
| 192 | const prfpregset_t *fpregset) |
| 193 | { |
| 194 | struct regcache *regcache = get_ps_regcache (ph, lwpid); |
| 195 | |
| 196 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregset); |
| 197 | target_store_registers (regcache, -1); |
| 198 | |
| 199 | return PS_OK; |
| 200 | } |
| 201 | |
| 202 | /* Return overall process id of the target PH. Special for GNU/Linux |
| 203 | -- not used on Solaris. */ |
| 204 | |
| 205 | pid_t |
| 206 | ps_getpid (struct ps_prochandle *ph) |
| 207 | { |
| 208 | return ph->thread->ptid.pid (); |
| 209 | } |
| 210 | |
| 211 | void |
| 212 | _initialize_proc_service (void) |
| 213 | { |
| 214 | /* This function solely exists to make sure this module is linked |
| 215 | into the final binary. */ |
| 216 | } |