| 1 | /* libthread_db helper functions for the remote server for GDB. |
| 2 | Copyright (C) 2002-2015 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 approriate 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 struct regs_info *regs_info = (*the_low_target.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 | read_inferior_memory ((uintptr_t) addr, (gdb_byte *) buf, size); |
| 84 | return PS_OK; |
| 85 | } |
| 86 | |
| 87 | /* Write SIZE bytes from BUF into the target process PH at address ADDR. */ |
| 88 | |
| 89 | ps_err_e |
| 90 | ps_pdwrite (gdb_ps_prochandle_t ph, psaddr_t addr, |
| 91 | gdb_ps_write_buf_t buf, gdb_ps_size_t size) |
| 92 | { |
| 93 | if (write_inferior_memory ((uintptr_t) addr, (const gdb_byte *) buf, size) |
| 94 | != 0) |
| 95 | return PS_ERR; |
| 96 | return PS_OK; |
| 97 | } |
| 98 | |
| 99 | /* Get the general registers of LWP LWPID within the target process PH |
| 100 | and store them in GREGSET. */ |
| 101 | |
| 102 | ps_err_e |
| 103 | ps_lgetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prgregset_t gregset) |
| 104 | { |
| 105 | #ifdef HAVE_REGSETS |
| 106 | struct lwp_info *lwp; |
| 107 | struct thread_info *reg_thread, *saved_thread; |
| 108 | struct regcache *regcache; |
| 109 | |
| 110 | lwp = find_lwp_pid (pid_to_ptid (lwpid)); |
| 111 | if (lwp == NULL) |
| 112 | return PS_ERR; |
| 113 | |
| 114 | reg_thread = get_lwp_thread (lwp); |
| 115 | saved_thread = current_thread; |
| 116 | current_thread = reg_thread; |
| 117 | regcache = get_thread_regcache (current_thread, 1); |
| 118 | gregset_info ()->fill_function (regcache, gregset); |
| 119 | |
| 120 | current_thread = saved_thread; |
| 121 | return PS_OK; |
| 122 | #else |
| 123 | return PS_ERR; |
| 124 | #endif |
| 125 | } |
| 126 | |
| 127 | /* Set the general registers of LWP LWPID within the target process PH |
| 128 | from GREGSET. */ |
| 129 | |
| 130 | ps_err_e |
| 131 | ps_lsetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prgregset_t gregset) |
| 132 | { |
| 133 | /* Unneeded. */ |
| 134 | return PS_ERR; |
| 135 | } |
| 136 | |
| 137 | /* Get the floating-point registers of LWP LWPID within the target |
| 138 | process PH and store them in FPREGSET. */ |
| 139 | |
| 140 | ps_err_e |
| 141 | ps_lgetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prfpregset_t *fpregset) |
| 142 | { |
| 143 | /* Unneeded. */ |
| 144 | return PS_ERR; |
| 145 | } |
| 146 | |
| 147 | /* Set the floating-point registers of LWP LWPID within the target |
| 148 | process PH from FPREGSET. */ |
| 149 | |
| 150 | ps_err_e |
| 151 | ps_lsetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prfpregset_t *fpregset) |
| 152 | { |
| 153 | /* Unneeded. */ |
| 154 | return PS_ERR; |
| 155 | } |
| 156 | |
| 157 | /* Return overall process id of the target PH. Special for GNU/Linux |
| 158 | -- not used on Solaris. */ |
| 159 | |
| 160 | pid_t |
| 161 | ps_getpid (gdb_ps_prochandle_t ph) |
| 162 | { |
| 163 | return pid_of (current_thread); |
| 164 | } |