/* <proc_service.h> implementation. Copyright (C) 1999-2016 Free Software Foundation, Inc. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "defs.h" #include "gdbcore.h" #include "inferior.h" #include "symtab.h" #include "target.h" #include "regcache.h" #include "objfiles.h" #include "gdb_proc_service.h" #include <sys/procfs.h> /* Prototypes for supply_gregset etc. */ #include "gregset.h" /* Fix-up some broken systems. */ /* The prototypes in <proc_service.h> are slightly different on older systems. Compensate for the discrepancies. */ #ifdef PROC_SERVICE_IS_OLD typedef const struct ps_prochandle *gdb_ps_prochandle_t; typedef char *gdb_ps_read_buf_t; typedef char *gdb_ps_write_buf_t; typedef int gdb_ps_size_t; #else typedef struct ps_prochandle *gdb_ps_prochandle_t; typedef void *gdb_ps_read_buf_t; typedef const void *gdb_ps_write_buf_t; typedef size_t gdb_ps_size_t; #endif /* Helper functions. */ /* Convert a psaddr_t to a CORE_ADDR. */ static CORE_ADDR ps_addr_to_core_addr (psaddr_t addr) { if (exec_bfd && bfd_get_sign_extend_vma (exec_bfd)) return (intptr_t) addr; else return (uintptr_t) addr; } /* Convert a CORE_ADDR to a psaddr_t. */ static psaddr_t core_addr_to_ps_addr (CORE_ADDR addr) { if (exec_bfd && bfd_get_sign_extend_vma (exec_bfd)) return (psaddr_t) (intptr_t) addr; else return (psaddr_t) (uintptr_t) addr; } /* Transfer LEN bytes of memory between BUF and address ADDR in the process specified by PH. If WRITE, transfer them to the process, else transfer them from the process. Returns PS_OK for success, PS_ERR on failure. This is a helper function for ps_pdread and ps_pdwrite. */ static ps_err_e ps_xfer_memory (const struct ps_prochandle *ph, psaddr_t addr, gdb_byte *buf, size_t len, int write) { struct cleanup *old_chain = save_inferior_ptid (); int ret; CORE_ADDR core_addr = ps_addr_to_core_addr (addr); inferior_ptid = ph->ptid; if (write) ret = target_write_memory (core_addr, buf, len); else ret = target_read_memory (core_addr, buf, len); do_cleanups (old_chain); return (ret == 0 ? PS_OK : PS_ERR); } /* Search for the symbol named NAME within the object named OBJ within the target process PH. If the symbol is found the address of the symbol is stored in SYM_ADDR. */ ps_err_e ps_pglobal_lookup (gdb_ps_prochandle_t ph, const char *obj, const char *name, psaddr_t *sym_addr) { struct bound_minimal_symbol ms; struct cleanup *old_chain = save_current_program_space (); struct inferior *inf = find_inferior_ptid (ph->ptid); ps_err_e result; set_current_program_space (inf->pspace); /* FIXME: kettenis/2000-09-03: What should we do with OBJ? */ ms = lookup_minimal_symbol (name, NULL, NULL); if (ms.minsym == NULL) result = PS_NOSYM; else { *sym_addr = core_addr_to_ps_addr (BMSYMBOL_VALUE_ADDRESS (ms)); result = PS_OK; } do_cleanups (old_chain); return result; } /* Read SIZE bytes from the target process PH at address ADDR and copy them into BUF. */ ps_err_e ps_pdread (gdb_ps_prochandle_t ph, psaddr_t addr, gdb_ps_read_buf_t buf, gdb_ps_size_t size) { return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 0); } /* Write SIZE bytes from BUF into the target process PH at address ADDR. */ ps_err_e ps_pdwrite (gdb_ps_prochandle_t ph, psaddr_t addr, gdb_ps_write_buf_t buf, gdb_ps_size_t size) { return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 1); } /* Get the general registers of LWP LWPID within the target process PH and store them in GREGSET. */ ps_err_e ps_lgetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prgregset_t gregset) { struct cleanup *old_chain = save_inferior_ptid (); struct regcache *regcache; inferior_ptid = ptid_build (ptid_get_pid (ph->ptid), lwpid, 0); regcache = get_thread_arch_regcache (inferior_ptid, target_gdbarch ()); target_fetch_registers (regcache, -1); fill_gregset (regcache, (gdb_gregset_t *) gregset, -1); do_cleanups (old_chain); return PS_OK; } /* Set the general registers of LWP LWPID within the target process PH from GREGSET. */ ps_err_e ps_lsetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prgregset_t gregset) { struct cleanup *old_chain = save_inferior_ptid (); struct regcache *regcache; inferior_ptid = ptid_build (ptid_get_pid (ph->ptid), lwpid, 0); regcache = get_thread_arch_regcache (inferior_ptid, target_gdbarch ()); supply_gregset (regcache, (const gdb_gregset_t *) gregset); target_store_registers (regcache, -1); do_cleanups (old_chain); return PS_OK; } /* Get the floating-point registers of LWP LWPID within the target process PH and store them in FPREGSET. */ ps_err_e ps_lgetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, gdb_prfpregset_t *fpregset) { struct cleanup *old_chain = save_inferior_ptid (); struct regcache *regcache; inferior_ptid = ptid_build (ptid_get_pid (ph->ptid), lwpid, 0); regcache = get_thread_arch_regcache (inferior_ptid, target_gdbarch ()); target_fetch_registers (regcache, -1); fill_fpregset (regcache, (gdb_fpregset_t *) fpregset, -1); do_cleanups (old_chain); return PS_OK; } /* Set the floating-point registers of LWP LWPID within the target process PH from FPREGSET. */ ps_err_e ps_lsetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const gdb_prfpregset_t *fpregset) { struct cleanup *old_chain = save_inferior_ptid (); struct regcache *regcache; inferior_ptid = ptid_build (ptid_get_pid (ph->ptid), lwpid, 0); regcache = get_thread_arch_regcache (inferior_ptid, target_gdbarch ()); supply_fpregset (regcache, (const gdb_fpregset_t *) fpregset); target_store_registers (regcache, -1); do_cleanups (old_chain); return PS_OK; } /* Return overall process id of the target PH. Special for GNU/Linux -- not used on Solaris. */ pid_t ps_getpid (gdb_ps_prochandle_t ph) { return ptid_get_pid (ph->ptid); } /* Provide a prototype to silence -Wmissing-prototypes. */ extern initialize_file_ftype _initialize_proc_service; void _initialize_proc_service (void) { /* This function solely exists to make sure this module is linked into the final binary. */ }