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- /* <proc_service.h> implementation.
- Copyright (C) 1999-2022 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 "gdbthread.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"
- /* Helper functions. */
- /* Convert a psaddr_t to a CORE_ADDR. */
- static CORE_ADDR
- ps_addr_to_core_addr (psaddr_t addr)
- {
- if (current_program_space->exec_bfd ()
- && bfd_get_sign_extend_vma (current_program_space->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 (current_program_space->exec_bfd ()
- && bfd_get_sign_extend_vma (current_program_space->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)
- {
- scoped_restore_current_inferior restore_inferior;
- set_current_inferior (ph->thread->inf);
- scoped_restore_current_program_space restore_current_progspace;
- set_current_program_space (ph->thread->inf->pspace);
- scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid);
- inferior_ptid = ph->thread->ptid;
- CORE_ADDR core_addr = ps_addr_to_core_addr (addr);
- int ret;
- if (write)
- ret = target_write_memory (core_addr, buf, len);
- else
- ret = target_read_memory (core_addr, buf, len);
- 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 (struct ps_prochandle *ph, const char *obj,
- const char *name, psaddr_t *sym_addr)
- {
- inferior *inf = ph->thread->inf;
- scoped_restore_current_program_space restore_pspace;
- set_current_program_space (inf->pspace);
- /* FIXME: kettenis/2000-09-03: What should we do with OBJ? */
- bound_minimal_symbol ms = lookup_minimal_symbol (name, NULL, NULL);
- if (ms.minsym == NULL)
- return PS_NOSYM;
- *sym_addr = core_addr_to_ps_addr (BMSYMBOL_VALUE_ADDRESS (ms));
- return PS_OK;
- }
- /* Read SIZE bytes from the target process PH at address ADDR and copy
- them into BUF. */
- ps_err_e
- ps_pdread (struct ps_prochandle *ph, psaddr_t addr, void *buf, 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 (struct ps_prochandle *ph, psaddr_t addr,
- const void *buf, size_t size)
- {
- return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 1);
- }
- /* Get a regcache for LWPID using its inferior's "main" architecture,
- which is the register set libthread_db expects to be using. In
- multi-arch debugging scenarios, the thread's architecture may
- differ from the inferior's "main" architecture. */
- static struct regcache *
- get_ps_regcache (struct ps_prochandle *ph, lwpid_t lwpid)
- {
- inferior *inf = ph->thread->inf;
- return get_thread_arch_regcache (inf->process_target (),
- ptid_t (inf->pid, lwpid),
- inf->gdbarch);
- }
- /* Get the general registers of LWP LWPID within the target process PH
- and store them in GREGSET. */
- ps_err_e
- ps_lgetregs (struct ps_prochandle *ph, lwpid_t lwpid, prgregset_t gregset)
- {
- struct regcache *regcache = get_ps_regcache (ph, lwpid);
- target_fetch_registers (regcache, -1);
- fill_gregset (regcache, (gdb_gregset_t *) gregset, -1);
- return PS_OK;
- }
- /* Set the general registers of LWP LWPID within the target process PH
- from GREGSET. */
- ps_err_e
- ps_lsetregs (struct ps_prochandle *ph, lwpid_t lwpid, const prgregset_t gregset)
- {
- struct regcache *regcache = get_ps_regcache (ph, lwpid);
- supply_gregset (regcache, (const gdb_gregset_t *) gregset);
- target_store_registers (regcache, -1);
- 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 (struct ps_prochandle *ph, lwpid_t lwpid,
- prfpregset_t *fpregset)
- {
- struct regcache *regcache = get_ps_regcache (ph, lwpid);
- target_fetch_registers (regcache, -1);
- fill_fpregset (regcache, (gdb_fpregset_t *) fpregset, -1);
- return PS_OK;
- }
- /* Set the floating-point registers of LWP LWPID within the target
- process PH from FPREGSET. */
- ps_err_e
- ps_lsetfpregs (struct ps_prochandle *ph, lwpid_t lwpid,
- const prfpregset_t *fpregset)
- {
- struct regcache *regcache = get_ps_regcache (ph, lwpid);
- supply_fpregset (regcache, (const gdb_fpregset_t *) fpregset);
- target_store_registers (regcache, -1);
- return PS_OK;
- }
- /* Return overall process id of the target PH. Special for GNU/Linux
- -- not used on Solaris. */
- pid_t
- ps_getpid (struct ps_prochandle *ph)
- {
- return ph->thread->ptid.pid ();
- }
- void _initialize_proc_service ();
- void
- _initialize_proc_service ()
- {
- /* This function solely exists to make sure this module is linked
- into the final binary. */
- }
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