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23181151a2
* NEWS: Mention target descriptions, "set tdesc filename", "unset tdesc filename", "show tdesc filename", and qXfer:features:read. * arch-utils.c (choose_architecture_for_target): New function. (gdbarch_info_fill): Call it. * target-descriptions.c (struct property): Make members non-const. (struct target_desc): Add arch member. (target_description_filename): New variable. (target_find_description): Try via XML first. (tdesc_architecture): New. (free_target_description, make_cleanup_free_target_description): New. (set_tdesc_property): Call xstrdup. (set_tdesc_architecture, tdesc_set_cmdlist, tdesc_show_cmdlist) (tdesc_unset_cmdlist, unset_tdesc_cmd, unset_tdesc_filename_cmd) (set_tdesc_cmd, show_tdesc_cmd, set_tdesc_filename_cmd) (show_tdesc_filename_cmd, _initialize_target_descriptions): New. * target-descriptions.h (tdesc_architecture) (make_cleanup_free_target_description, set_tdesc_architecture): New prototypes. * Makefile.in (SFILES): Add xml-tdesc.c. (COMMON_OBS): Add xml-tdesc.o. (target-descriptions.o): Update. (xml-tdesc.o): New rule. * xml-tdesc.c, xml-tdesc.h: New files. * remote.c (PACKET_qXfer_features): New enum. (remote_protocol_features): Add qXfer:features:read. (remote_xfer_partial): Handle TARGET_OBJECT_AVAILABLE_FEATURES. (_initialize_remote): Register qXfer:features:read. * target.h (enum target_object): Add TARGET_OBJECT_AVAILABLE_FEATURES. * features/gdb-target.dtd: New file. * linux-i386-low.c (the_low_target): Set arch_string. * linux-x86-64-low.c (the_low_target): Likewise. * linux-low.c (linux_arch_string): New. (linux_target_ops): Add it. * linux-low.h (struct linux_target_ops): Add arch_string. * server.c (write_qxfer_response): Use const void * for DATA. (get_features_xml): New. (handle_query): Handle qXfer:features:read. Report it for qSupported. * target.h (struct target_ops): Add arch_string method. * gdb.texinfo (Target Descriptions): New section. (General Query Packets): Add QPassSignals anchor. Mention qXfer:features:read under qSupported. Expand mentions of qXfer:memory-map:read and QPassSignals. Document qXfer:features:read.
182 lines
4.1 KiB
C
182 lines
4.1 KiB
C
/* GNU/Linux/x86-64 specific low level interface, for the remote server
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for GDB.
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Copyright (C) 2002, 2004, 2005, 2006, 2007 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 2 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, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include "server.h"
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#include "linux-low.h"
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#include "i387-fp.h"
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#include "gdb_proc_service.h"
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#include <sys/reg.h>
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#include <sys/procfs.h>
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#include <sys/ptrace.h>
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/* This definition comes from prctl.h, but some kernels may not have it. */
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#ifndef PTRACE_ARCH_PRCTL
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#define PTRACE_ARCH_PRCTL 30
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#endif
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/* The following definitions come from prctl.h, but may be absent
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for certain configurations. */
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#ifndef ARCH_GET_FS
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#define ARCH_SET_GS 0x1001
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#define ARCH_SET_FS 0x1002
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#define ARCH_GET_FS 0x1003
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#define ARCH_GET_GS 0x1004
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#endif
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static int x86_64_regmap[] = {
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RAX * 8, RBX * 8, RCX * 8, RDX * 8,
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RSI * 8, RDI * 8, RBP * 8, RSP * 8,
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R8 * 8, R9 * 8, R10 * 8, R11 * 8,
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R12 * 8, R13 * 8, R14 * 8, R15 * 8,
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RIP * 8, EFLAGS * 8, CS * 8, SS * 8,
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DS * 8, ES * 8, FS * 8, GS * 8,
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-1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1,
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ORIG_RAX * 8
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};
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#define X86_64_NUM_GREGS (sizeof(x86_64_regmap)/sizeof(int))
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/* Called by libthread_db. */
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ps_err_e
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ps_get_thread_area (const struct ps_prochandle *ph,
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lwpid_t lwpid, int idx, void **base)
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{
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switch (idx)
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{
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case FS:
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if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0)
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return PS_OK;
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break;
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case GS:
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if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0)
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return PS_OK;
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break;
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default:
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return PS_BADADDR;
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}
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return PS_ERR;
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}
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static void
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x86_64_fill_gregset (void *buf)
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{
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int i;
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for (i = 0; i < X86_64_NUM_GREGS; i++)
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if (x86_64_regmap[i] != -1)
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collect_register (i, ((char *) buf) + x86_64_regmap[i]);
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}
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static void
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x86_64_store_gregset (const void *buf)
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{
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int i;
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for (i = 0; i < X86_64_NUM_GREGS; i++)
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if (x86_64_regmap[i] != -1)
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supply_register (i, ((char *) buf) + x86_64_regmap[i]);
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}
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static void
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x86_64_fill_fpregset (void *buf)
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{
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i387_cache_to_fxsave (buf);
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}
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static void
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x86_64_store_fpregset (const void *buf)
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{
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i387_fxsave_to_cache (buf);
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}
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struct regset_info target_regsets[] = {
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{ PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t),
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GENERAL_REGS,
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x86_64_fill_gregset, x86_64_store_gregset },
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{ PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t),
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FP_REGS,
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x86_64_fill_fpregset, x86_64_store_fpregset },
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{ 0, 0, -1, -1, NULL, NULL }
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};
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static const unsigned char x86_64_breakpoint[] = { 0xCC };
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#define x86_64_breakpoint_len 1
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extern int debug_threads;
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static CORE_ADDR
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x86_64_get_pc ()
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{
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unsigned long pc;
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collect_register_by_name ("rip", &pc);
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if (debug_threads)
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fprintf (stderr, "stop pc (before any decrement) is %08lx\n", pc);
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return pc;
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}
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static void
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x86_64_set_pc (CORE_ADDR newpc)
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{
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if (debug_threads)
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fprintf (stderr, "set pc to %08lx\n", (long) newpc);
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supply_register_by_name ("rip", &newpc);
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}
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static int
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x86_64_breakpoint_at (CORE_ADDR pc)
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{
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unsigned char c;
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read_inferior_memory (pc, &c, 1);
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if (c == 0xCC)
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return 1;
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return 0;
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}
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struct linux_target_ops the_low_target = {
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-1,
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NULL,
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NULL,
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NULL,
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x86_64_get_pc,
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x86_64_set_pc,
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x86_64_breakpoint,
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x86_64_breakpoint_len,
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NULL,
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1,
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x86_64_breakpoint_at,
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NULL,
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NULL,
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NULL,
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NULL,
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0,
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"i386:x86-64",
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};
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