352 lines
9.0 KiB
C
352 lines
9.0 KiB
C
/* <proc_service.h> implementation.
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Copyright (C) 1999-2013 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "gdbcore.h"
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#include "inferior.h"
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#include "symtab.h"
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#include "target.h"
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#include "regcache.h"
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#include "gdb_proc_service.h"
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#include <sys/procfs.h>
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/* Prototypes for supply_gregset etc. */
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#include "gregset.h"
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/* Fix-up some broken systems. */
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/* The prototypes in <proc_service.h> are slightly different on older
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systems. Compensate for the discrepancies. */
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#ifdef PROC_SERVICE_IS_OLD
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typedef const struct ps_prochandle *gdb_ps_prochandle_t;
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typedef char *gdb_ps_read_buf_t;
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typedef char *gdb_ps_write_buf_t;
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typedef int gdb_ps_size_t;
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#else
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typedef struct ps_prochandle *gdb_ps_prochandle_t;
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typedef void *gdb_ps_read_buf_t;
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typedef const void *gdb_ps_write_buf_t;
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typedef size_t gdb_ps_size_t;
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#endif
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/* Helper functions. */
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/* Convert a psaddr_t to a CORE_ADDR. */
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static CORE_ADDR
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ps_addr_to_core_addr (psaddr_t addr)
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{
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if (exec_bfd && bfd_get_sign_extend_vma (exec_bfd))
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return (intptr_t) addr;
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else
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return (uintptr_t) addr;
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}
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/* Convert a CORE_ADDR to a psaddr_t. */
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static psaddr_t
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core_addr_to_ps_addr (CORE_ADDR addr)
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{
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if (exec_bfd && bfd_get_sign_extend_vma (exec_bfd))
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return (psaddr_t) (intptr_t) addr;
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else
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return (psaddr_t) (uintptr_t) addr;
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}
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/* Transfer LEN bytes of memory between BUF and address ADDR in the
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process specified by PH. If WRITE, transfer them to the process,
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else transfer them from the process. Returns PS_OK for success,
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PS_ERR on failure.
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This is a helper function for ps_pdread, ps_pdwrite, ps_ptread and
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ps_ptwrite. */
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static ps_err_e
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ps_xfer_memory (const struct ps_prochandle *ph, psaddr_t addr,
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gdb_byte *buf, size_t len, int write)
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{
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struct cleanup *old_chain = save_inferior_ptid ();
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int ret;
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CORE_ADDR core_addr = ps_addr_to_core_addr (addr);
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inferior_ptid = ph->ptid;
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if (write)
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ret = target_write_memory (core_addr, buf, len);
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else
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ret = target_read_memory (core_addr, buf, len);
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do_cleanups (old_chain);
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return (ret == 0 ? PS_OK : PS_ERR);
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}
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/* Stop the target process PH. */
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ps_err_e
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ps_pstop (gdb_ps_prochandle_t ph)
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{
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/* The process is always stopped when under control of GDB. */
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return PS_OK;
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}
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/* Resume the target process PH. */
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ps_err_e
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ps_pcontinue (gdb_ps_prochandle_t ph)
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{
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/* Pretend we did successfully continue the process. GDB will take
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care of it later on. */
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return PS_OK;
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}
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/* Stop the lightweight process LWPID within the target process PH. */
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ps_err_e
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ps_lstop (gdb_ps_prochandle_t ph, lwpid_t lwpid)
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{
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/* All lightweight processes are stopped when under control of GDB. */
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return PS_OK;
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}
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/* Resume the lightweight process (LWP) LWPID within the target
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process PH. */
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ps_err_e
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ps_lcontinue (gdb_ps_prochandle_t ph, lwpid_t lwpid)
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{
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/* Pretend we did successfully continue LWPID. GDB will take care
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of it later on. */
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return PS_OK;
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}
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/* Get the size of the architecture-dependent extra state registers
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for LWP LWPID within the target process PH and return it in
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*XREGSIZE. */
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ps_err_e
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ps_lgetxregsize (gdb_ps_prochandle_t ph, lwpid_t lwpid, int *xregsize)
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{
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/* FIXME: Not supported yet. */
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return PS_OK;
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}
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/* Get the extra state registers of LWP LWPID within the target
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process PH and store them in XREGSET. */
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ps_err_e
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ps_lgetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset)
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{
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/* FIXME: Not supported yet. */
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return PS_OK;
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}
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/* Set the extra state registers of LWP LWPID within the target
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process PH from XREGSET. */
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ps_err_e
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ps_lsetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset)
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{
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/* FIXME: Not supported yet. */
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return PS_OK;
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}
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/* Log (additional) diognostic information. */
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void
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ps_plog (const char *fmt, ...)
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{
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va_list args;
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va_start (args, fmt);
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vfprintf_filtered (gdb_stderr, fmt, args);
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va_end (args);
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}
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/* Search for the symbol named NAME within the object named OBJ within
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the target process PH. If the symbol is found the address of the
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symbol is stored in SYM_ADDR. */
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ps_err_e
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ps_pglobal_lookup (gdb_ps_prochandle_t ph, const char *obj,
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const char *name, psaddr_t *sym_addr)
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{
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struct minimal_symbol *ms;
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struct cleanup *old_chain = save_current_program_space ();
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struct inferior *inf = find_inferior_pid (ptid_get_pid (ph->ptid));
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ps_err_e result;
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set_current_program_space (inf->pspace);
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/* FIXME: kettenis/2000-09-03: What should we do with OBJ? */
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ms = lookup_minimal_symbol (name, NULL, NULL);
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if (ms == NULL)
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result = PS_NOSYM;
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else
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{
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*sym_addr = core_addr_to_ps_addr (SYMBOL_VALUE_ADDRESS (ms));
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result = PS_OK;
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}
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do_cleanups (old_chain);
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return result;
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}
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/* Read SIZE bytes from the target process PH at address ADDR and copy
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them into BUF. */
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ps_err_e
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ps_pdread (gdb_ps_prochandle_t ph, psaddr_t addr,
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gdb_ps_read_buf_t buf, gdb_ps_size_t size)
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{
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return ps_xfer_memory (ph, addr, buf, size, 0);
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}
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/* Write SIZE bytes from BUF into the target process PH at address ADDR. */
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ps_err_e
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ps_pdwrite (gdb_ps_prochandle_t ph, psaddr_t addr,
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gdb_ps_write_buf_t buf, gdb_ps_size_t size)
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{
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return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 1);
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}
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/* Read SIZE bytes from the target process PH at address ADDR and copy
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them into BUF. */
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ps_err_e
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ps_ptread (gdb_ps_prochandle_t ph, psaddr_t addr,
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gdb_ps_read_buf_t buf, gdb_ps_size_t size)
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{
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return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 0);
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}
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/* Write SIZE bytes from BUF into the target process PH at address ADDR. */
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ps_err_e
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ps_ptwrite (gdb_ps_prochandle_t ph, psaddr_t addr,
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gdb_ps_write_buf_t buf, gdb_ps_size_t size)
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{
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return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 1);
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}
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/* Get the general registers of LWP LWPID within the target process PH
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and store them in GREGSET. */
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ps_err_e
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ps_lgetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prgregset_t gregset)
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{
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struct cleanup *old_chain = save_inferior_ptid ();
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struct regcache *regcache;
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inferior_ptid = ptid_build (ptid_get_pid (ph->ptid), lwpid, 0);
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regcache = get_thread_arch_regcache (inferior_ptid, target_gdbarch ());
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target_fetch_registers (regcache, -1);
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fill_gregset (regcache, (gdb_gregset_t *) gregset, -1);
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do_cleanups (old_chain);
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return PS_OK;
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}
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/* Set the general registers of LWP LWPID within the target process PH
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from GREGSET. */
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ps_err_e
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ps_lsetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prgregset_t gregset)
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{
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struct cleanup *old_chain = save_inferior_ptid ();
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struct regcache *regcache;
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inferior_ptid = ptid_build (ptid_get_pid (ph->ptid), lwpid, 0);
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regcache = get_thread_arch_regcache (inferior_ptid, target_gdbarch ());
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supply_gregset (regcache, (const gdb_gregset_t *) gregset);
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target_store_registers (regcache, -1);
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do_cleanups (old_chain);
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return PS_OK;
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}
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/* Get the floating-point registers of LWP LWPID within the target
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process PH and store them in FPREGSET. */
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ps_err_e
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ps_lgetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid,
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gdb_prfpregset_t *fpregset)
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{
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struct cleanup *old_chain = save_inferior_ptid ();
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struct regcache *regcache;
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inferior_ptid = ptid_build (ptid_get_pid (ph->ptid), lwpid, 0);
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regcache = get_thread_arch_regcache (inferior_ptid, target_gdbarch ());
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target_fetch_registers (regcache, -1);
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fill_fpregset (regcache, (gdb_fpregset_t *) fpregset, -1);
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do_cleanups (old_chain);
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return PS_OK;
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}
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/* Set the floating-point registers of LWP LWPID within the target
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process PH from FPREGSET. */
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ps_err_e
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ps_lsetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid,
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const gdb_prfpregset_t *fpregset)
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{
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struct cleanup *old_chain = save_inferior_ptid ();
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struct regcache *regcache;
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inferior_ptid = ptid_build (ptid_get_pid (ph->ptid), lwpid, 0);
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regcache = get_thread_arch_regcache (inferior_ptid, target_gdbarch ());
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supply_fpregset (regcache, (const gdb_fpregset_t *) fpregset);
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target_store_registers (regcache, -1);
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do_cleanups (old_chain);
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return PS_OK;
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}
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/* Return overall process id of the target PH. Special for GNU/Linux
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-- not used on Solaris. */
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pid_t
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ps_getpid (gdb_ps_prochandle_t ph)
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{
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return ptid_get_pid (ph->ptid);
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}
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/* Provide a prototype to silence -Wmissing-prototypes. */
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extern initialize_file_ftype _initialize_proc_service;
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void
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_initialize_proc_service (void)
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{
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/* This function solely exists to make sure this module is linked
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into the final binary. */
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}
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