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/*
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* gdb server stub
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*
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* Copyright (c) 2003-2005 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
|
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* modify it under the terms of the GNU Lesser General Public
|
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* License as published by the Free Software Foundation; either
|
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h" |
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#include "qemu-common.h" |
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#ifdef CONFIG_USER_ONLY
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <stdarg.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <unistd.h> |
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#include <fcntl.h> |
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|
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#include "qemu.h" |
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#else
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#include "monitor/monitor.h" |
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#include "sysemu/char.h" |
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#include "sysemu/sysemu.h" |
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#include "exec/gdbstub.h" |
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#endif
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|
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#define MAX_PACKET_LENGTH 4096 |
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|
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#include "cpu.h" |
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#include "qemu/sockets.h" |
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#include "sysemu/kvm.h" |
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#include "qemu/bitops.h" |
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|
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static inline int target_memory_rw_debug(CPUState *cpu, target_ulong addr, |
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uint8_t *buf, int len, bool is_write) |
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{
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CPUClass *cc = CPU_GET_CLASS(cpu); |
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|
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if (cc->memory_rw_debug) {
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return cc->memory_rw_debug(cpu, addr, buf, len, is_write);
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} |
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return cpu_memory_rw_debug(cpu, addr, buf, len, is_write);
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} |
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|
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enum {
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GDB_SIGNAL_0 = 0,
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GDB_SIGNAL_INT = 2,
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GDB_SIGNAL_QUIT = 3,
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GDB_SIGNAL_TRAP = 5,
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GDB_SIGNAL_ABRT = 6,
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GDB_SIGNAL_ALRM = 14,
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GDB_SIGNAL_IO = 23,
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GDB_SIGNAL_XCPU = 24,
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GDB_SIGNAL_UNKNOWN = 143
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}; |
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|
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#ifdef CONFIG_USER_ONLY
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|
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/* Map target signal numbers to GDB protocol signal numbers and vice
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* versa. For user emulation's currently supported systems, we can
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* assume most signals are defined.
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*/
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|
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static int gdb_signal_table[] = { |
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0,
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TARGET_SIGHUP, |
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TARGET_SIGINT, |
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TARGET_SIGQUIT, |
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TARGET_SIGILL, |
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TARGET_SIGTRAP, |
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TARGET_SIGABRT, |
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-1, /* SIGEMT */ |
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TARGET_SIGFPE, |
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TARGET_SIGKILL, |
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TARGET_SIGBUS, |
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TARGET_SIGSEGV, |
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TARGET_SIGSYS, |
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TARGET_SIGPIPE, |
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TARGET_SIGALRM, |
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TARGET_SIGTERM, |
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TARGET_SIGURG, |
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TARGET_SIGSTOP, |
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TARGET_SIGTSTP, |
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TARGET_SIGCONT, |
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TARGET_SIGCHLD, |
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TARGET_SIGTTIN, |
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TARGET_SIGTTOU, |
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TARGET_SIGIO, |
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TARGET_SIGXCPU, |
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TARGET_SIGXFSZ, |
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TARGET_SIGVTALRM, |
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TARGET_SIGPROF, |
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TARGET_SIGWINCH, |
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-1, /* SIGLOST */ |
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TARGET_SIGUSR1, |
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TARGET_SIGUSR2, |
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#ifdef TARGET_SIGPWR
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TARGET_SIGPWR, |
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#else
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-1,
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#endif
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-1, /* SIGPOLL */ |
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-1,
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-1,
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-1,
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-1,
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-1,
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-1,
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-1,
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-1,
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-1,
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-1,
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-1,
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#ifdef __SIGRTMIN
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__SIGRTMIN + 1,
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__SIGRTMIN + 2,
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__SIGRTMIN + 3,
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__SIGRTMIN + 4,
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__SIGRTMIN + 5,
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__SIGRTMIN + 6,
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__SIGRTMIN + 7,
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__SIGRTMIN + 8,
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__SIGRTMIN + 9,
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__SIGRTMIN + 10,
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__SIGRTMIN + 11,
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__SIGRTMIN + 12,
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__SIGRTMIN + 13,
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__SIGRTMIN + 14,
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__SIGRTMIN + 15,
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__SIGRTMIN + 16,
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__SIGRTMIN + 17,
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__SIGRTMIN + 18,
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__SIGRTMIN + 19,
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__SIGRTMIN + 20,
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__SIGRTMIN + 21,
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__SIGRTMIN + 22,
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__SIGRTMIN + 23,
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__SIGRTMIN + 24,
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__SIGRTMIN + 25,
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__SIGRTMIN + 26,
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__SIGRTMIN + 27,
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__SIGRTMIN + 28,
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__SIGRTMIN + 29,
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__SIGRTMIN + 30,
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__SIGRTMIN + 31,
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-1, /* SIGCANCEL */ |
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__SIGRTMIN, |
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__SIGRTMIN + 32,
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__SIGRTMIN + 33,
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__SIGRTMIN + 34,
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__SIGRTMIN + 35,
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__SIGRTMIN + 36,
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__SIGRTMIN + 37,
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__SIGRTMIN + 38,
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__SIGRTMIN + 39,
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__SIGRTMIN + 40,
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__SIGRTMIN + 41,
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__SIGRTMIN + 42,
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__SIGRTMIN + 43,
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__SIGRTMIN + 44,
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__SIGRTMIN + 45,
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__SIGRTMIN + 46,
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__SIGRTMIN + 47,
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__SIGRTMIN + 48,
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__SIGRTMIN + 49,
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__SIGRTMIN + 50,
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__SIGRTMIN + 51,
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__SIGRTMIN + 52,
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__SIGRTMIN + 53,
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__SIGRTMIN + 54,
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__SIGRTMIN + 55,
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__SIGRTMIN + 56,
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__SIGRTMIN + 57,
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__SIGRTMIN + 58,
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__SIGRTMIN + 59,
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__SIGRTMIN + 60,
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__SIGRTMIN + 61,
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__SIGRTMIN + 62,
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__SIGRTMIN + 63,
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__SIGRTMIN + 64,
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__SIGRTMIN + 65,
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__SIGRTMIN + 66,
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__SIGRTMIN + 67,
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__SIGRTMIN + 68,
|
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__SIGRTMIN + 69,
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__SIGRTMIN + 70,
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__SIGRTMIN + 71,
|
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__SIGRTMIN + 72,
|
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__SIGRTMIN + 73,
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__SIGRTMIN + 74,
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__SIGRTMIN + 75,
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__SIGRTMIN + 76,
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__SIGRTMIN + 77,
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__SIGRTMIN + 78,
|
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__SIGRTMIN + 79,
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__SIGRTMIN + 80,
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__SIGRTMIN + 81,
|
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__SIGRTMIN + 82,
|
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__SIGRTMIN + 83,
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__SIGRTMIN + 84,
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__SIGRTMIN + 85,
|
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__SIGRTMIN + 86,
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__SIGRTMIN + 87,
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__SIGRTMIN + 88,
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__SIGRTMIN + 89,
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__SIGRTMIN + 90,
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__SIGRTMIN + 91,
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__SIGRTMIN + 92,
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__SIGRTMIN + 93,
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__SIGRTMIN + 94,
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__SIGRTMIN + 95,
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-1, /* SIGINFO */ |
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-1, /* UNKNOWN */ |
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-1, /* DEFAULT */ |
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-1,
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-1,
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-1,
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-1,
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-1,
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-1
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#endif
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}; |
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#else
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/* In system mode we only need SIGINT and SIGTRAP; other signals
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are not yet supported. */
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enum {
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TARGET_SIGINT = 2,
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TARGET_SIGTRAP = 5
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}; |
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|
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static int gdb_signal_table[] = { |
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-1,
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-1,
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TARGET_SIGINT, |
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-1,
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-1,
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TARGET_SIGTRAP |
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}; |
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#endif
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|
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#ifdef CONFIG_USER_ONLY
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static int target_signal_to_gdb (int sig) |
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{
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int i;
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for (i = 0; i < ARRAY_SIZE (gdb_signal_table); i++) |
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if (gdb_signal_table[i] == sig)
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return i;
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return GDB_SIGNAL_UNKNOWN;
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} |
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#endif
|
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|
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static int gdb_signal_to_target (int sig) |
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{
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if (sig < ARRAY_SIZE (gdb_signal_table))
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return gdb_signal_table[sig];
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else
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return -1; |
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} |
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|
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//#define DEBUG_GDB
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|
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typedef struct GDBRegisterState { |
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int base_reg;
|
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int num_regs;
|
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gdb_reg_cb get_reg; |
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gdb_reg_cb set_reg; |
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const char *xml; |
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struct GDBRegisterState *next;
|
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} GDBRegisterState; |
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|
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enum RSState {
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RS_INACTIVE, |
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RS_IDLE, |
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RS_GETLINE, |
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RS_CHKSUM1, |
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RS_CHKSUM2, |
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}; |
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typedef struct GDBState { |
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CPUState *c_cpu; /* current CPU for step/continue ops */
|
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CPUState *g_cpu; /* current CPU for other ops */
|
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CPUState *query_cpu; /* for q{f|s}ThreadInfo */
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enum RSState state; /* parsing state */ |
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char line_buf[MAX_PACKET_LENGTH];
|
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int line_buf_index;
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int line_csum;
|
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uint8_t last_packet[MAX_PACKET_LENGTH + 4];
|
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int last_packet_len;
|
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int signal;
|
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#ifdef CONFIG_USER_ONLY
|
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int fd;
|
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int running_state;
|
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#else
|
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CharDriverState *chr; |
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CharDriverState *mon_chr; |
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#endif
|
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char syscall_buf[256]; |
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gdb_syscall_complete_cb current_syscall_cb; |
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} GDBState; |
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|
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/* By default use no IRQs and no timers while single stepping so as to
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* make single stepping like an ICE HW step.
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*/
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static int sstep_flags = SSTEP_ENABLE|SSTEP_NOIRQ|SSTEP_NOTIMER; |
| 316 |
|
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static GDBState *gdbserver_state;
|
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|
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/* This is an ugly hack to cope with both new and old gdb.
|
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If gdb sends qXfer:features:read then assume we're talking to a newish
|
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gdb that understands target descriptions. */
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static int gdb_has_xml; |
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|
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#ifdef CONFIG_USER_ONLY
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/* XXX: This is not thread safe. Do we care? */
|
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static int gdbserver_fd = -1; |
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|
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static int get_char(GDBState *s) |
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{
|
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uint8_t ch; |
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int ret;
|
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|
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for(;;) {
|
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ret = qemu_recv(s->fd, &ch, 1, 0); |
| 335 |
if (ret < 0) { |
| 336 |
if (errno == ECONNRESET)
|
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s->fd = -1;
|
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if (errno != EINTR && errno != EAGAIN)
|
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return -1; |
| 340 |
} else if (ret == 0) { |
| 341 |
close(s->fd); |
| 342 |
s->fd = -1;
|
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return -1; |
| 344 |
} else {
|
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break;
|
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} |
| 347 |
} |
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return ch;
|
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} |
| 350 |
#endif
|
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|
| 352 |
static enum { |
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GDB_SYS_UNKNOWN, |
| 354 |
GDB_SYS_ENABLED, |
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GDB_SYS_DISABLED, |
| 356 |
} gdb_syscall_mode; |
| 357 |
|
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/* If gdb is connected when the first semihosting syscall occurs then use
|
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remote gdb syscalls. Otherwise use native file IO. */
|
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int use_gdb_syscalls(void) |
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{
|
| 362 |
if (gdb_syscall_mode == GDB_SYS_UNKNOWN) {
|
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gdb_syscall_mode = (gdbserver_state ? GDB_SYS_ENABLED |
| 364 |
: GDB_SYS_DISABLED); |
| 365 |
} |
| 366 |
return gdb_syscall_mode == GDB_SYS_ENABLED;
|
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} |
| 368 |
|
| 369 |
/* Resume execution. */
|
| 370 |
static inline void gdb_continue(GDBState *s) |
| 371 |
{
|
| 372 |
#ifdef CONFIG_USER_ONLY
|
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s->running_state = 1;
|
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#else
|
| 375 |
if (runstate_check(RUN_STATE_GUEST_PANICKED)) {
|
| 376 |
runstate_set(RUN_STATE_DEBUG); |
| 377 |
} |
| 378 |
if (!runstate_needs_reset()) {
|
| 379 |
vm_start(); |
| 380 |
} |
| 381 |
#endif
|
| 382 |
} |
| 383 |
|
| 384 |
static void put_buffer(GDBState *s, const uint8_t *buf, int len) |
| 385 |
{
|
| 386 |
#ifdef CONFIG_USER_ONLY
|
| 387 |
int ret;
|
| 388 |
|
| 389 |
while (len > 0) { |
| 390 |
ret = send(s->fd, buf, len, 0);
|
| 391 |
if (ret < 0) { |
| 392 |
if (errno != EINTR && errno != EAGAIN)
|
| 393 |
return;
|
| 394 |
} else {
|
| 395 |
buf += ret; |
| 396 |
len -= ret; |
| 397 |
} |
| 398 |
} |
| 399 |
#else
|
| 400 |
qemu_chr_fe_write(s->chr, buf, len); |
| 401 |
#endif
|
| 402 |
} |
| 403 |
|
| 404 |
static inline int fromhex(int v) |
| 405 |
{
|
| 406 |
if (v >= '0' && v <= '9') |
| 407 |
return v - '0'; |
| 408 |
else if (v >= 'A' && v <= 'F') |
| 409 |
return v - 'A' + 10; |
| 410 |
else if (v >= 'a' && v <= 'f') |
| 411 |
return v - 'a' + 10; |
| 412 |
else
|
| 413 |
return 0; |
| 414 |
} |
| 415 |
|
| 416 |
static inline int tohex(int v) |
| 417 |
{
|
| 418 |
if (v < 10) |
| 419 |
return v + '0'; |
| 420 |
else
|
| 421 |
return v - 10 + 'a'; |
| 422 |
} |
| 423 |
|
| 424 |
static void memtohex(char *buf, const uint8_t *mem, int len) |
| 425 |
{
|
| 426 |
int i, c;
|
| 427 |
char *q;
|
| 428 |
q = buf; |
| 429 |
for(i = 0; i < len; i++) { |
| 430 |
c = mem[i]; |
| 431 |
*q++ = tohex(c >> 4);
|
| 432 |
*q++ = tohex(c & 0xf);
|
| 433 |
} |
| 434 |
*q = '\0';
|
| 435 |
} |
| 436 |
|
| 437 |
static void hextomem(uint8_t *mem, const char *buf, int len) |
| 438 |
{
|
| 439 |
int i;
|
| 440 |
|
| 441 |
for(i = 0; i < len; i++) { |
| 442 |
mem[i] = (fromhex(buf[0]) << 4) | fromhex(buf[1]); |
| 443 |
buf += 2;
|
| 444 |
} |
| 445 |
} |
| 446 |
|
| 447 |
/* return -1 if error, 0 if OK */
|
| 448 |
static int put_packet_binary(GDBState *s, const char *buf, int len) |
| 449 |
{
|
| 450 |
int csum, i;
|
| 451 |
uint8_t *p; |
| 452 |
|
| 453 |
for(;;) {
|
| 454 |
p = s->last_packet; |
| 455 |
*(p++) = '$';
|
| 456 |
memcpy(p, buf, len); |
| 457 |
p += len; |
| 458 |
csum = 0;
|
| 459 |
for(i = 0; i < len; i++) { |
| 460 |
csum += buf[i]; |
| 461 |
} |
| 462 |
*(p++) = '#';
|
| 463 |
*(p++) = tohex((csum >> 4) & 0xf); |
| 464 |
*(p++) = tohex((csum) & 0xf);
|
| 465 |
|
| 466 |
s->last_packet_len = p - s->last_packet; |
| 467 |
put_buffer(s, (uint8_t *)s->last_packet, s->last_packet_len); |
| 468 |
|
| 469 |
#ifdef CONFIG_USER_ONLY
|
| 470 |
i = get_char(s); |
| 471 |
if (i < 0) |
| 472 |
return -1; |
| 473 |
if (i == '+') |
| 474 |
break;
|
| 475 |
#else
|
| 476 |
break;
|
| 477 |
#endif
|
| 478 |
} |
| 479 |
return 0; |
| 480 |
} |
| 481 |
|
| 482 |
/* return -1 if error, 0 if OK */
|
| 483 |
static int put_packet(GDBState *s, const char *buf) |
| 484 |
{
|
| 485 |
#ifdef DEBUG_GDB
|
| 486 |
printf("reply='%s'\n", buf);
|
| 487 |
#endif
|
| 488 |
|
| 489 |
return put_packet_binary(s, buf, strlen(buf));
|
| 490 |
} |
| 491 |
|
| 492 |
/* The GDB remote protocol transfers values in target byte order. This means
|
| 493 |
we can use the raw memory access routines to access the value buffer.
|
| 494 |
Conveniently, these also handle the case where the buffer is mis-aligned.
|
| 495 |
*/
|
| 496 |
#define GET_REG8(val) do { \ |
| 497 |
stb_p(mem_buf, val); \ |
| 498 |
return 1; \ |
| 499 |
} while(0) |
| 500 |
#define GET_REG16(val) do { \ |
| 501 |
stw_p(mem_buf, val); \ |
| 502 |
return 2; \ |
| 503 |
} while(0) |
| 504 |
#define GET_REG32(val) do { \ |
| 505 |
stl_p(mem_buf, val); \ |
| 506 |
return 4; \ |
| 507 |
} while(0) |
| 508 |
#define GET_REG64(val) do { \ |
| 509 |
stq_p(mem_buf, val); \ |
| 510 |
return 8; \ |
| 511 |
} while(0) |
| 512 |
|
| 513 |
#if TARGET_LONG_BITS == 64 |
| 514 |
#define GET_REGL(val) GET_REG64(val)
|
| 515 |
#define ldtul_p(addr) ldq_p(addr)
|
| 516 |
#else
|
| 517 |
#define GET_REGL(val) GET_REG32(val)
|
| 518 |
#define ldtul_p(addr) ldl_p(addr)
|
| 519 |
#endif
|
| 520 |
|
| 521 |
#if defined(TARGET_I386)
|
| 522 |
|
| 523 |
#include "target-i386/gdbstub.c" |
| 524 |
|
| 525 |
#elif defined (TARGET_PPC)
|
| 526 |
|
| 527 |
#if defined (TARGET_PPC64)
|
| 528 |
#define GDB_CORE_XML "power64-core.xml" |
| 529 |
#else
|
| 530 |
#define GDB_CORE_XML "power-core.xml" |
| 531 |
#endif
|
| 532 |
|
| 533 |
#include "target-ppc/gdbstub.c" |
| 534 |
|
| 535 |
#elif defined (TARGET_SPARC)
|
| 536 |
|
| 537 |
#include "target-sparc/gdbstub.c" |
| 538 |
|
| 539 |
#elif defined (TARGET_ARM)
|
| 540 |
|
| 541 |
#define GDB_CORE_XML "arm-core.xml" |
| 542 |
|
| 543 |
#include "target-arm/gdbstub.c" |
| 544 |
|
| 545 |
#elif defined (TARGET_M68K)
|
| 546 |
|
| 547 |
#define GDB_CORE_XML "cf-core.xml" |
| 548 |
|
| 549 |
#include "target-m68k/gdbstub.c" |
| 550 |
|
| 551 |
#elif defined (TARGET_MIPS)
|
| 552 |
|
| 553 |
#include "target-mips/gdbstub.c" |
| 554 |
|
| 555 |
#elif defined(TARGET_OPENRISC)
|
| 556 |
|
| 557 |
#include "target-openrisc/gdbstub.c" |
| 558 |
|
| 559 |
#elif defined (TARGET_SH4)
|
| 560 |
|
| 561 |
#include "target-sh4/gdbstub.c" |
| 562 |
|
| 563 |
#elif defined (TARGET_MICROBLAZE)
|
| 564 |
|
| 565 |
#include "target-microblaze/gdbstub.c" |
| 566 |
|
| 567 |
#elif defined (TARGET_CRIS)
|
| 568 |
|
| 569 |
#include "target-cris/gdbstub.c" |
| 570 |
|
| 571 |
#elif defined (TARGET_ALPHA)
|
| 572 |
|
| 573 |
#include "target-alpha/gdbstub.c" |
| 574 |
|
| 575 |
#elif defined (TARGET_S390X)
|
| 576 |
|
| 577 |
#include "target-s390x/gdbstub.c" |
| 578 |
|
| 579 |
#elif defined (TARGET_LM32)
|
| 580 |
|
| 581 |
#include "hw/lm32/lm32_pic.h" |
| 582 |
|
| 583 |
static int cpu_gdb_read_register(CPULM32State *env, uint8_t *mem_buf, int n) |
| 584 |
{
|
| 585 |
if (n < 32) { |
| 586 |
GET_REG32(env->regs[n]); |
| 587 |
} else {
|
| 588 |
switch (n) {
|
| 589 |
case 32: |
| 590 |
GET_REG32(env->pc); |
| 591 |
/* FIXME: put in right exception ID */
|
| 592 |
case 33: |
| 593 |
GET_REG32(0);
|
| 594 |
case 34: |
| 595 |
GET_REG32(env->eba); |
| 596 |
case 35: |
| 597 |
GET_REG32(env->deba); |
| 598 |
case 36: |
| 599 |
GET_REG32(env->ie); |
| 600 |
case 37: |
| 601 |
GET_REG32(lm32_pic_get_im(env->pic_state)); |
| 602 |
case 38: |
| 603 |
GET_REG32(lm32_pic_get_ip(env->pic_state)); |
| 604 |
} |
| 605 |
} |
| 606 |
return 0; |
| 607 |
} |
| 608 |
|
| 609 |
static int cpu_gdb_write_register(CPULM32State *env, uint8_t *mem_buf, int n) |
| 610 |
{
|
| 611 |
LM32CPU *cpu = lm32_env_get_cpu(env); |
| 612 |
CPUClass *cc = CPU_GET_CLASS(cpu); |
| 613 |
uint32_t tmp; |
| 614 |
|
| 615 |
if (n > cc->gdb_num_core_regs) {
|
| 616 |
return 0; |
| 617 |
} |
| 618 |
|
| 619 |
tmp = ldl_p(mem_buf); |
| 620 |
|
| 621 |
if (n < 32) { |
| 622 |
env->regs[n] = tmp; |
| 623 |
} else {
|
| 624 |
switch (n) {
|
| 625 |
case 32: |
| 626 |
env->pc = tmp; |
| 627 |
break;
|
| 628 |
case 34: |
| 629 |
env->eba = tmp; |
| 630 |
break;
|
| 631 |
case 35: |
| 632 |
env->deba = tmp; |
| 633 |
break;
|
| 634 |
case 36: |
| 635 |
env->ie = tmp; |
| 636 |
break;
|
| 637 |
case 37: |
| 638 |
lm32_pic_set_im(env->pic_state, tmp); |
| 639 |
break;
|
| 640 |
case 38: |
| 641 |
lm32_pic_set_ip(env->pic_state, tmp); |
| 642 |
break;
|
| 643 |
} |
| 644 |
} |
| 645 |
return 4; |
| 646 |
} |
| 647 |
#elif defined(TARGET_XTENSA)
|
| 648 |
|
| 649 |
static int cpu_gdb_read_register(CPUXtensaState *env, uint8_t *mem_buf, int n) |
| 650 |
{
|
| 651 |
const XtensaGdbReg *reg = env->config->gdb_regmap.reg + n;
|
| 652 |
|
| 653 |
if (n < 0 || n >= env->config->gdb_regmap.num_regs) { |
| 654 |
return 0; |
| 655 |
} |
| 656 |
|
| 657 |
switch (reg->type) {
|
| 658 |
case 9: /*pc*/ |
| 659 |
GET_REG32(env->pc); |
| 660 |
|
| 661 |
case 1: /*ar*/ |
| 662 |
xtensa_sync_phys_from_window(env); |
| 663 |
GET_REG32(env->phys_regs[(reg->targno & 0xff) % env->config->nareg]);
|
| 664 |
|
| 665 |
case 2: /*SR*/ |
| 666 |
GET_REG32(env->sregs[reg->targno & 0xff]);
|
| 667 |
|
| 668 |
case 3: /*UR*/ |
| 669 |
GET_REG32(env->uregs[reg->targno & 0xff]);
|
| 670 |
|
| 671 |
case 4: /*f*/ |
| 672 |
GET_REG32(float32_val(env->fregs[reg->targno & 0x0f]));
|
| 673 |
|
| 674 |
case 8: /*a*/ |
| 675 |
GET_REG32(env->regs[reg->targno & 0x0f]);
|
| 676 |
|
| 677 |
default:
|
| 678 |
qemu_log("%s from reg %d of unsupported type %d\n",
|
| 679 |
__func__, n, reg->type); |
| 680 |
return 0; |
| 681 |
} |
| 682 |
} |
| 683 |
|
| 684 |
static int cpu_gdb_write_register(CPUXtensaState *env, uint8_t *mem_buf, int n) |
| 685 |
{
|
| 686 |
uint32_t tmp; |
| 687 |
const XtensaGdbReg *reg = env->config->gdb_regmap.reg + n;
|
| 688 |
|
| 689 |
if (n < 0 || n >= env->config->gdb_regmap.num_regs) { |
| 690 |
return 0; |
| 691 |
} |
| 692 |
|
| 693 |
tmp = ldl_p(mem_buf); |
| 694 |
|
| 695 |
switch (reg->type) {
|
| 696 |
case 9: /*pc*/ |
| 697 |
env->pc = tmp; |
| 698 |
break;
|
| 699 |
|
| 700 |
case 1: /*ar*/ |
| 701 |
env->phys_regs[(reg->targno & 0xff) % env->config->nareg] = tmp;
|
| 702 |
xtensa_sync_window_from_phys(env); |
| 703 |
break;
|
| 704 |
|
| 705 |
case 2: /*SR*/ |
| 706 |
env->sregs[reg->targno & 0xff] = tmp;
|
| 707 |
break;
|
| 708 |
|
| 709 |
case 3: /*UR*/ |
| 710 |
env->uregs[reg->targno & 0xff] = tmp;
|
| 711 |
break;
|
| 712 |
|
| 713 |
case 4: /*f*/ |
| 714 |
env->fregs[reg->targno & 0x0f] = make_float32(tmp);
|
| 715 |
break;
|
| 716 |
|
| 717 |
case 8: /*a*/ |
| 718 |
env->regs[reg->targno & 0x0f] = tmp;
|
| 719 |
break;
|
| 720 |
|
| 721 |
default:
|
| 722 |
qemu_log("%s to reg %d of unsupported type %d\n",
|
| 723 |
__func__, n, reg->type); |
| 724 |
return 0; |
| 725 |
} |
| 726 |
|
| 727 |
return 4; |
| 728 |
} |
| 729 |
#else
|
| 730 |
|
| 731 |
static int cpu_gdb_read_register(CPUArchState *env, uint8_t *mem_buf, int n) |
| 732 |
{
|
| 733 |
return 0; |
| 734 |
} |
| 735 |
|
| 736 |
static int cpu_gdb_write_register(CPUArchState *env, uint8_t *mem_buf, int n) |
| 737 |
{
|
| 738 |
return 0; |
| 739 |
} |
| 740 |
|
| 741 |
#endif
|
| 742 |
|
| 743 |
#ifdef GDB_CORE_XML
|
| 744 |
/* Encode data using the encoding for 'x' packets. */
|
| 745 |
static int memtox(char *buf, const char *mem, int len) |
| 746 |
{
|
| 747 |
char *p = buf;
|
| 748 |
char c;
|
| 749 |
|
| 750 |
while (len--) {
|
| 751 |
c = *(mem++); |
| 752 |
switch (c) {
|
| 753 |
case '#': case '$': case '*': case '}': |
| 754 |
*(p++) = '}';
|
| 755 |
*(p++) = c ^ 0x20;
|
| 756 |
break;
|
| 757 |
default:
|
| 758 |
*(p++) = c; |
| 759 |
break;
|
| 760 |
} |
| 761 |
} |
| 762 |
return p - buf;
|
| 763 |
} |
| 764 |
|
| 765 |
static const char *get_feature_xml(const char *p, const char **newp) |
| 766 |
{
|
| 767 |
size_t len; |
| 768 |
int i;
|
| 769 |
const char *name; |
| 770 |
static char target_xml[1024]; |
| 771 |
|
| 772 |
len = 0;
|
| 773 |
while (p[len] && p[len] != ':') |
| 774 |
len++; |
| 775 |
*newp = p + len; |
| 776 |
|
| 777 |
name = NULL;
|
| 778 |
if (strncmp(p, "target.xml", len) == 0) { |
| 779 |
/* Generate the XML description for this CPU. */
|
| 780 |
if (!target_xml[0]) { |
| 781 |
GDBRegisterState *r; |
| 782 |
CPUState *cpu = first_cpu; |
| 783 |
|
| 784 |
snprintf(target_xml, sizeof(target_xml),
|
| 785 |
"<?xml version=\"1.0\"?>"
|
| 786 |
"<!DOCTYPE target SYSTEM \"gdb-target.dtd\">"
|
| 787 |
"<target>"
|
| 788 |
"<xi:include href=\"%s\"/>",
|
| 789 |
GDB_CORE_XML); |
| 790 |
|
| 791 |
for (r = cpu->gdb_regs; r; r = r->next) {
|
| 792 |
pstrcat(target_xml, sizeof(target_xml), "<xi:include href=\""); |
| 793 |
pstrcat(target_xml, sizeof(target_xml), r->xml);
|
| 794 |
pstrcat(target_xml, sizeof(target_xml), "\"/>"); |
| 795 |
} |
| 796 |
pstrcat(target_xml, sizeof(target_xml), "</target>"); |
| 797 |
} |
| 798 |
return target_xml;
|
| 799 |
} |
| 800 |
for (i = 0; ; i++) { |
| 801 |
name = xml_builtin[i][0];
|
| 802 |
if (!name || (strncmp(name, p, len) == 0 && strlen(name) == len)) |
| 803 |
break;
|
| 804 |
} |
| 805 |
return name ? xml_builtin[i][1] : NULL; |
| 806 |
} |
| 807 |
#endif
|
| 808 |
|
| 809 |
static int gdb_read_register(CPUState *cpu, uint8_t *mem_buf, int reg) |
| 810 |
{
|
| 811 |
CPUClass *cc = CPU_GET_CLASS(cpu); |
| 812 |
CPUArchState *env = cpu->env_ptr; |
| 813 |
GDBRegisterState *r; |
| 814 |
|
| 815 |
if (reg < cc->gdb_num_core_regs) {
|
| 816 |
return cpu_gdb_read_register(env, mem_buf, reg);
|
| 817 |
} |
| 818 |
|
| 819 |
for (r = cpu->gdb_regs; r; r = r->next) {
|
| 820 |
if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) {
|
| 821 |
return r->get_reg(env, mem_buf, reg - r->base_reg);
|
| 822 |
} |
| 823 |
} |
| 824 |
return 0; |
| 825 |
} |
| 826 |
|
| 827 |
static int gdb_write_register(CPUState *cpu, uint8_t *mem_buf, int reg) |
| 828 |
{
|
| 829 |
CPUClass *cc = CPU_GET_CLASS(cpu); |
| 830 |
CPUArchState *env = cpu->env_ptr; |
| 831 |
GDBRegisterState *r; |
| 832 |
|
| 833 |
if (reg < cc->gdb_num_core_regs) {
|
| 834 |
return cpu_gdb_write_register(env, mem_buf, reg);
|
| 835 |
} |
| 836 |
|
| 837 |
for (r = cpu->gdb_regs; r; r = r->next) {
|
| 838 |
if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) {
|
| 839 |
return r->set_reg(env, mem_buf, reg - r->base_reg);
|
| 840 |
} |
| 841 |
} |
| 842 |
return 0; |
| 843 |
} |
| 844 |
|
| 845 |
/* Register a supplemental set of CPU registers. If g_pos is nonzero it
|
| 846 |
specifies the first register number and these registers are included in
|
| 847 |
a standard "g" packet. Direction is relative to gdb, i.e. get_reg is
|
| 848 |
gdb reading a CPU register, and set_reg is gdb modifying a CPU register.
|
| 849 |
*/
|
| 850 |
|
| 851 |
void gdb_register_coprocessor(CPUState *cpu,
|
| 852 |
gdb_reg_cb get_reg, gdb_reg_cb set_reg, |
| 853 |
int num_regs, const char *xml, int g_pos) |
| 854 |
{
|
| 855 |
GDBRegisterState *s; |
| 856 |
GDBRegisterState **p; |
| 857 |
|
| 858 |
p = &cpu->gdb_regs; |
| 859 |
while (*p) {
|
| 860 |
/* Check for duplicates. */
|
| 861 |
if (strcmp((*p)->xml, xml) == 0) |
| 862 |
return;
|
| 863 |
p = &(*p)->next; |
| 864 |
} |
| 865 |
|
| 866 |
s = g_new0(GDBRegisterState, 1);
|
| 867 |
s->base_reg = cpu->gdb_num_regs; |
| 868 |
s->num_regs = num_regs; |
| 869 |
s->get_reg = get_reg; |
| 870 |
s->set_reg = set_reg; |
| 871 |
s->xml = xml; |
| 872 |
|
| 873 |
/* Add to end of list. */
|
| 874 |
cpu->gdb_num_regs += num_regs; |
| 875 |
*p = s; |
| 876 |
if (g_pos) {
|
| 877 |
if (g_pos != s->base_reg) {
|
| 878 |
fprintf(stderr, "Error: Bad gdb register numbering for '%s'\n"
|
| 879 |
"Expected %d got %d\n", xml, g_pos, s->base_reg);
|
| 880 |
} |
| 881 |
} |
| 882 |
} |
| 883 |
|
| 884 |
#ifndef CONFIG_USER_ONLY
|
| 885 |
static const int xlat_gdb_type[] = { |
| 886 |
[GDB_WATCHPOINT_WRITE] = BP_GDB | BP_MEM_WRITE, |
| 887 |
[GDB_WATCHPOINT_READ] = BP_GDB | BP_MEM_READ, |
| 888 |
[GDB_WATCHPOINT_ACCESS] = BP_GDB | BP_MEM_ACCESS, |
| 889 |
}; |
| 890 |
#endif
|
| 891 |
|
| 892 |
static int gdb_breakpoint_insert(target_ulong addr, target_ulong len, int type) |
| 893 |
{
|
| 894 |
CPUState *cpu; |
| 895 |
CPUArchState *env; |
| 896 |
int err = 0; |
| 897 |
|
| 898 |
if (kvm_enabled()) {
|
| 899 |
return kvm_insert_breakpoint(gdbserver_state->c_cpu, addr, len, type);
|
| 900 |
} |
| 901 |
|
| 902 |
switch (type) {
|
| 903 |
case GDB_BREAKPOINT_SW:
|
| 904 |
case GDB_BREAKPOINT_HW:
|
| 905 |
for (cpu = first_cpu; cpu != NULL; cpu = cpu->next_cpu) { |
| 906 |
env = cpu->env_ptr; |
| 907 |
err = cpu_breakpoint_insert(env, addr, BP_GDB, NULL);
|
| 908 |
if (err)
|
| 909 |
break;
|
| 910 |
} |
| 911 |
return err;
|
| 912 |
#ifndef CONFIG_USER_ONLY
|
| 913 |
case GDB_WATCHPOINT_WRITE:
|
| 914 |
case GDB_WATCHPOINT_READ:
|
| 915 |
case GDB_WATCHPOINT_ACCESS:
|
| 916 |
for (cpu = first_cpu; cpu != NULL; cpu = cpu->next_cpu) { |
| 917 |
env = cpu->env_ptr; |
| 918 |
err = cpu_watchpoint_insert(env, addr, len, xlat_gdb_type[type], |
| 919 |
NULL);
|
| 920 |
if (err)
|
| 921 |
break;
|
| 922 |
} |
| 923 |
return err;
|
| 924 |
#endif
|
| 925 |
default:
|
| 926 |
return -ENOSYS;
|
| 927 |
} |
| 928 |
} |
| 929 |
|
| 930 |
static int gdb_breakpoint_remove(target_ulong addr, target_ulong len, int type) |
| 931 |
{
|
| 932 |
CPUState *cpu; |
| 933 |
CPUArchState *env; |
| 934 |
int err = 0; |
| 935 |
|
| 936 |
if (kvm_enabled()) {
|
| 937 |
return kvm_remove_breakpoint(gdbserver_state->c_cpu, addr, len, type);
|
| 938 |
} |
| 939 |
|
| 940 |
switch (type) {
|
| 941 |
case GDB_BREAKPOINT_SW:
|
| 942 |
case GDB_BREAKPOINT_HW:
|
| 943 |
for (cpu = first_cpu; cpu != NULL; cpu = cpu->next_cpu) { |
| 944 |
env = cpu->env_ptr; |
| 945 |
err = cpu_breakpoint_remove(env, addr, BP_GDB); |
| 946 |
if (err)
|
| 947 |
break;
|
| 948 |
} |
| 949 |
return err;
|
| 950 |
#ifndef CONFIG_USER_ONLY
|
| 951 |
case GDB_WATCHPOINT_WRITE:
|
| 952 |
case GDB_WATCHPOINT_READ:
|
| 953 |
case GDB_WATCHPOINT_ACCESS:
|
| 954 |
for (cpu = first_cpu; cpu != NULL; cpu = cpu->next_cpu) { |
| 955 |
env = cpu->env_ptr; |
| 956 |
err = cpu_watchpoint_remove(env, addr, len, xlat_gdb_type[type]); |
| 957 |
if (err)
|
| 958 |
break;
|
| 959 |
} |
| 960 |
return err;
|
| 961 |
#endif
|
| 962 |
default:
|
| 963 |
return -ENOSYS;
|
| 964 |
} |
| 965 |
} |
| 966 |
|
| 967 |
static void gdb_breakpoint_remove_all(void) |
| 968 |
{
|
| 969 |
CPUState *cpu; |
| 970 |
CPUArchState *env; |
| 971 |
|
| 972 |
if (kvm_enabled()) {
|
| 973 |
kvm_remove_all_breakpoints(gdbserver_state->c_cpu); |
| 974 |
return;
|
| 975 |
} |
| 976 |
|
| 977 |
for (cpu = first_cpu; cpu != NULL; cpu = cpu->next_cpu) { |
| 978 |
env = cpu->env_ptr; |
| 979 |
cpu_breakpoint_remove_all(env, BP_GDB); |
| 980 |
#ifndef CONFIG_USER_ONLY
|
| 981 |
cpu_watchpoint_remove_all(env, BP_GDB); |
| 982 |
#endif
|
| 983 |
} |
| 984 |
} |
| 985 |
|
| 986 |
static void gdb_set_cpu_pc(GDBState *s, target_ulong pc) |
| 987 |
{
|
| 988 |
CPUState *cpu = s->c_cpu; |
| 989 |
CPUClass *cc = CPU_GET_CLASS(cpu); |
| 990 |
|
| 991 |
cpu_synchronize_state(cpu); |
| 992 |
if (cc->set_pc) {
|
| 993 |
cc->set_pc(cpu, pc); |
| 994 |
} |
| 995 |
} |
| 996 |
|
| 997 |
static CPUState *find_cpu(uint32_t thread_id)
|
| 998 |
{
|
| 999 |
CPUState *cpu; |
| 1000 |
|
| 1001 |
for (cpu = first_cpu; cpu != NULL; cpu = cpu->next_cpu) { |
| 1002 |
if (cpu_index(cpu) == thread_id) {
|
| 1003 |
return cpu;
|
| 1004 |
} |
| 1005 |
} |
| 1006 |
|
| 1007 |
return NULL; |
| 1008 |
} |
| 1009 |
|
| 1010 |
static int gdb_handle_packet(GDBState *s, const char *line_buf) |
| 1011 |
{
|
| 1012 |
CPUState *cpu; |
| 1013 |
const char *p; |
| 1014 |
uint32_t thread; |
| 1015 |
int ch, reg_size, type, res;
|
| 1016 |
char buf[MAX_PACKET_LENGTH];
|
| 1017 |
uint8_t mem_buf[MAX_PACKET_LENGTH]; |
| 1018 |
uint8_t *registers; |
| 1019 |
target_ulong addr, len; |
| 1020 |
|
| 1021 |
#ifdef DEBUG_GDB
|
| 1022 |
printf("command='%s'\n", line_buf);
|
| 1023 |
#endif
|
| 1024 |
p = line_buf; |
| 1025 |
ch = *p++; |
| 1026 |
switch(ch) {
|
| 1027 |
case '?': |
| 1028 |
/* TODO: Make this return the correct value for user-mode. */
|
| 1029 |
snprintf(buf, sizeof(buf), "T%02xthread:%02x;", GDB_SIGNAL_TRAP, |
| 1030 |
cpu_index(s->c_cpu)); |
| 1031 |
put_packet(s, buf); |
| 1032 |
/* Remove all the breakpoints when this query is issued,
|
| 1033 |
* because gdb is doing and initial connect and the state
|
| 1034 |
* should be cleaned up.
|
| 1035 |
*/
|
| 1036 |
gdb_breakpoint_remove_all(); |
| 1037 |
break;
|
| 1038 |
case 'c': |
| 1039 |
if (*p != '\0') { |
| 1040 |
addr = strtoull(p, (char **)&p, 16); |
| 1041 |
gdb_set_cpu_pc(s, addr); |
| 1042 |
} |
| 1043 |
s->signal = 0;
|
| 1044 |
gdb_continue(s); |
| 1045 |
return RS_IDLE;
|
| 1046 |
case 'C': |
| 1047 |
s->signal = gdb_signal_to_target (strtoul(p, (char **)&p, 16)); |
| 1048 |
if (s->signal == -1) |
| 1049 |
s->signal = 0;
|
| 1050 |
gdb_continue(s); |
| 1051 |
return RS_IDLE;
|
| 1052 |
case 'v': |
| 1053 |
if (strncmp(p, "Cont", 4) == 0) { |
| 1054 |
int res_signal, res_thread;
|
| 1055 |
|
| 1056 |
p += 4;
|
| 1057 |
if (*p == '?') { |
| 1058 |
put_packet(s, "vCont;c;C;s;S");
|
| 1059 |
break;
|
| 1060 |
} |
| 1061 |
res = 0;
|
| 1062 |
res_signal = 0;
|
| 1063 |
res_thread = 0;
|
| 1064 |
while (*p) {
|
| 1065 |
int action, signal;
|
| 1066 |
|
| 1067 |
if (*p++ != ';') { |
| 1068 |
res = 0;
|
| 1069 |
break;
|
| 1070 |
} |
| 1071 |
action = *p++; |
| 1072 |
signal = 0;
|
| 1073 |
if (action == 'C' || action == 'S') { |
| 1074 |
signal = strtoul(p, (char **)&p, 16); |
| 1075 |
} else if (action != 'c' && action != 's') { |
| 1076 |
res = 0;
|
| 1077 |
break;
|
| 1078 |
} |
| 1079 |
thread = 0;
|
| 1080 |
if (*p == ':') { |
| 1081 |
thread = strtoull(p+1, (char **)&p, 16); |
| 1082 |
} |
| 1083 |
action = tolower(action); |
| 1084 |
if (res == 0 || (res == 'c' && action == 's')) { |
| 1085 |
res = action; |
| 1086 |
res_signal = signal; |
| 1087 |
res_thread = thread; |
| 1088 |
} |
| 1089 |
} |
| 1090 |
if (res) {
|
| 1091 |
if (res_thread != -1 && res_thread != 0) { |
| 1092 |
cpu = find_cpu(res_thread); |
| 1093 |
if (cpu == NULL) { |
| 1094 |
put_packet(s, "E22");
|
| 1095 |
break;
|
| 1096 |
} |
| 1097 |
s->c_cpu = cpu; |
| 1098 |
} |
| 1099 |
if (res == 's') { |
| 1100 |
cpu_single_step(s->c_cpu, sstep_flags); |
| 1101 |
} |
| 1102 |
s->signal = res_signal; |
| 1103 |
gdb_continue(s); |
| 1104 |
return RS_IDLE;
|
| 1105 |
} |
| 1106 |
break;
|
| 1107 |
} else {
|
| 1108 |
goto unknown_command;
|
| 1109 |
} |
| 1110 |
case 'k': |
| 1111 |
#ifdef CONFIG_USER_ONLY
|
| 1112 |
/* Kill the target */
|
| 1113 |
fprintf(stderr, "\nQEMU: Terminated via GDBstub\n");
|
| 1114 |
exit(0);
|
| 1115 |
#endif
|
| 1116 |
case 'D': |
| 1117 |
/* Detach packet */
|
| 1118 |
gdb_breakpoint_remove_all(); |
| 1119 |
gdb_syscall_mode = GDB_SYS_DISABLED; |
| 1120 |
gdb_continue(s); |
| 1121 |
put_packet(s, "OK");
|
| 1122 |
break;
|
| 1123 |
case 's': |
| 1124 |
if (*p != '\0') { |
| 1125 |
addr = strtoull(p, (char **)&p, 16); |
| 1126 |
gdb_set_cpu_pc(s, addr); |
| 1127 |
} |
| 1128 |
cpu_single_step(s->c_cpu, sstep_flags); |
| 1129 |
gdb_continue(s); |
| 1130 |
return RS_IDLE;
|
| 1131 |
case 'F': |
| 1132 |
{
|
| 1133 |
target_ulong ret; |
| 1134 |
target_ulong err; |
| 1135 |
|
| 1136 |
ret = strtoull(p, (char **)&p, 16); |
| 1137 |
if (*p == ',') { |
| 1138 |
p++; |
| 1139 |
err = strtoull(p, (char **)&p, 16); |
| 1140 |
} else {
|
| 1141 |
err = 0;
|
| 1142 |
} |
| 1143 |
if (*p == ',') |
| 1144 |
p++; |
| 1145 |
type = *p; |
| 1146 |
if (s->current_syscall_cb) {
|
| 1147 |
s->current_syscall_cb(s->c_cpu, ret, err); |
| 1148 |
s->current_syscall_cb = NULL;
|
| 1149 |
} |
| 1150 |
if (type == 'C') { |
| 1151 |
put_packet(s, "T02");
|
| 1152 |
} else {
|
| 1153 |
gdb_continue(s); |
| 1154 |
} |
| 1155 |
} |
| 1156 |
break;
|
| 1157 |
case 'g': |
| 1158 |
cpu_synchronize_state(s->g_cpu); |
| 1159 |
len = 0;
|
| 1160 |
for (addr = 0; addr < s->g_cpu->gdb_num_regs; addr++) { |
| 1161 |
reg_size = gdb_read_register(s->g_cpu, mem_buf + len, addr); |
| 1162 |
len += reg_size; |
| 1163 |
} |
| 1164 |
memtohex(buf, mem_buf, len); |
| 1165 |
put_packet(s, buf); |
| 1166 |
break;
|
| 1167 |
case 'G': |
| 1168 |
cpu_synchronize_state(s->g_cpu); |
| 1169 |
registers = mem_buf; |
| 1170 |
len = strlen(p) / 2;
|
| 1171 |
hextomem((uint8_t *)registers, p, len); |
| 1172 |
for (addr = 0; addr < s->g_cpu->gdb_num_regs && len > 0; addr++) { |
| 1173 |
reg_size = gdb_write_register(s->g_cpu, registers, addr); |
| 1174 |
len -= reg_size; |
| 1175 |
registers += reg_size; |
| 1176 |
} |
| 1177 |
put_packet(s, "OK");
|
| 1178 |
break;
|
| 1179 |
case 'm': |
| 1180 |
addr = strtoull(p, (char **)&p, 16); |
| 1181 |
if (*p == ',') |
| 1182 |
p++; |
| 1183 |
len = strtoull(p, NULL, 16); |
| 1184 |
if (target_memory_rw_debug(s->g_cpu, addr, mem_buf, len, false) != 0) { |
| 1185 |
put_packet (s, "E14");
|
| 1186 |
} else {
|
| 1187 |
memtohex(buf, mem_buf, len); |
| 1188 |
put_packet(s, buf); |
| 1189 |
} |
| 1190 |
break;
|
| 1191 |
case 'M': |
| 1192 |
addr = strtoull(p, (char **)&p, 16); |
| 1193 |
if (*p == ',') |
| 1194 |
p++; |
| 1195 |
len = strtoull(p, (char **)&p, 16); |
| 1196 |
if (*p == ':') |
| 1197 |
p++; |
| 1198 |
hextomem(mem_buf, p, len); |
| 1199 |
if (target_memory_rw_debug(s->g_cpu, addr, mem_buf, len,
|
| 1200 |
true) != 0) { |
| 1201 |
put_packet(s, "E14");
|
| 1202 |
} else {
|
| 1203 |
put_packet(s, "OK");
|
| 1204 |
} |
| 1205 |
break;
|
| 1206 |
case 'p': |
| 1207 |
/* Older gdb are really dumb, and don't use 'g' if 'p' is avaialable.
|
| 1208 |
This works, but can be very slow. Anything new enough to
|
| 1209 |
understand XML also knows how to use this properly. */
|
| 1210 |
if (!gdb_has_xml)
|
| 1211 |
goto unknown_command;
|
| 1212 |
addr = strtoull(p, (char **)&p, 16); |
| 1213 |
reg_size = gdb_read_register(s->g_cpu, mem_buf, addr); |
| 1214 |
if (reg_size) {
|
| 1215 |
memtohex(buf, mem_buf, reg_size); |
| 1216 |
put_packet(s, buf); |
| 1217 |
} else {
|
| 1218 |
put_packet(s, "E14");
|
| 1219 |
} |
| 1220 |
break;
|
| 1221 |
case 'P': |
| 1222 |
if (!gdb_has_xml)
|
| 1223 |
goto unknown_command;
|
| 1224 |
addr = strtoull(p, (char **)&p, 16); |
| 1225 |
if (*p == '=') |
| 1226 |
p++; |
| 1227 |
reg_size = strlen(p) / 2;
|
| 1228 |
hextomem(mem_buf, p, reg_size); |
| 1229 |
gdb_write_register(s->g_cpu, mem_buf, addr); |
| 1230 |
put_packet(s, "OK");
|
| 1231 |
break;
|
| 1232 |
case 'Z': |
| 1233 |
case 'z': |
| 1234 |
type = strtoul(p, (char **)&p, 16); |
| 1235 |
if (*p == ',') |
| 1236 |
p++; |
| 1237 |
addr = strtoull(p, (char **)&p, 16); |
| 1238 |
if (*p == ',') |
| 1239 |
p++; |
| 1240 |
len = strtoull(p, (char **)&p, 16); |
| 1241 |
if (ch == 'Z') |
| 1242 |
res = gdb_breakpoint_insert(addr, len, type); |
| 1243 |
else
|
| 1244 |
res = gdb_breakpoint_remove(addr, len, type); |
| 1245 |
if (res >= 0) |
| 1246 |
put_packet(s, "OK");
|
| 1247 |
else if (res == -ENOSYS) |
| 1248 |
put_packet(s, "");
|
| 1249 |
else
|
| 1250 |
put_packet(s, "E22");
|
| 1251 |
break;
|
| 1252 |
case 'H': |
| 1253 |
type = *p++; |
| 1254 |
thread = strtoull(p, (char **)&p, 16); |
| 1255 |
if (thread == -1 || thread == 0) { |
| 1256 |
put_packet(s, "OK");
|
| 1257 |
break;
|
| 1258 |
} |
| 1259 |
cpu = find_cpu(thread); |
| 1260 |
if (cpu == NULL) { |
| 1261 |
put_packet(s, "E22");
|
| 1262 |
break;
|
| 1263 |
} |
| 1264 |
switch (type) {
|
| 1265 |
case 'c': |
| 1266 |
s->c_cpu = cpu; |
| 1267 |
put_packet(s, "OK");
|
| 1268 |
break;
|
| 1269 |
case 'g': |
| 1270 |
s->g_cpu = cpu; |
| 1271 |
put_packet(s, "OK");
|
| 1272 |
break;
|
| 1273 |
default:
|
| 1274 |
put_packet(s, "E22");
|
| 1275 |
break;
|
| 1276 |
} |
| 1277 |
break;
|
| 1278 |
case 'T': |
| 1279 |
thread = strtoull(p, (char **)&p, 16); |
| 1280 |
cpu = find_cpu(thread); |
| 1281 |
|
| 1282 |
if (cpu != NULL) { |
| 1283 |
put_packet(s, "OK");
|
| 1284 |
} else {
|
| 1285 |
put_packet(s, "E22");
|
| 1286 |
} |
| 1287 |
break;
|
| 1288 |
case 'q': |
| 1289 |
case 'Q': |
| 1290 |
/* parse any 'q' packets here */
|
| 1291 |
if (!strcmp(p,"qemu.sstepbits")) { |
| 1292 |
/* Query Breakpoint bit definitions */
|
| 1293 |
snprintf(buf, sizeof(buf), "ENABLE=%x,NOIRQ=%x,NOTIMER=%x", |
| 1294 |
SSTEP_ENABLE, |
| 1295 |
SSTEP_NOIRQ, |
| 1296 |
SSTEP_NOTIMER); |
| 1297 |
put_packet(s, buf); |
| 1298 |
break;
|
| 1299 |
} else if (strncmp(p,"qemu.sstep",10) == 0) { |
| 1300 |
/* Display or change the sstep_flags */
|
| 1301 |
p += 10;
|
| 1302 |
if (*p != '=') { |
| 1303 |
/* Display current setting */
|
| 1304 |
snprintf(buf, sizeof(buf), "0x%x", sstep_flags); |
| 1305 |
put_packet(s, buf); |
| 1306 |
break;
|
| 1307 |
} |
| 1308 |
p++; |
| 1309 |
type = strtoul(p, (char **)&p, 16); |
| 1310 |
sstep_flags = type; |
| 1311 |
put_packet(s, "OK");
|
| 1312 |
break;
|
| 1313 |
} else if (strcmp(p,"C") == 0) { |
| 1314 |
/* "Current thread" remains vague in the spec, so always return
|
| 1315 |
* the first CPU (gdb returns the first thread). */
|
| 1316 |
put_packet(s, "QC1");
|
| 1317 |
break;
|
| 1318 |
} else if (strcmp(p,"fThreadInfo") == 0) { |
| 1319 |
s->query_cpu = first_cpu; |
| 1320 |
goto report_cpuinfo;
|
| 1321 |
} else if (strcmp(p,"sThreadInfo") == 0) { |
| 1322 |
report_cpuinfo:
|
| 1323 |
if (s->query_cpu) {
|
| 1324 |
snprintf(buf, sizeof(buf), "m%x", cpu_index(s->query_cpu)); |
| 1325 |
put_packet(s, buf); |
| 1326 |
s->query_cpu = s->query_cpu->next_cpu; |
| 1327 |
} else
|
| 1328 |
put_packet(s, "l");
|
| 1329 |
break;
|
| 1330 |
} else if (strncmp(p,"ThreadExtraInfo,", 16) == 0) { |
| 1331 |
thread = strtoull(p+16, (char **)&p, 16); |
| 1332 |
cpu = find_cpu(thread); |
| 1333 |
if (cpu != NULL) { |
| 1334 |
cpu_synchronize_state(cpu); |
| 1335 |
len = snprintf((char *)mem_buf, sizeof(mem_buf), |
| 1336 |
"CPU#%d [%s]", cpu->cpu_index,
|
| 1337 |
cpu->halted ? "halted " : "running"); |
| 1338 |
memtohex(buf, mem_buf, len); |
| 1339 |
put_packet(s, buf); |
| 1340 |
} |
| 1341 |
break;
|
| 1342 |
} |
| 1343 |
#ifdef CONFIG_USER_ONLY
|
| 1344 |
else if (strncmp(p, "Offsets", 7) == 0) { |
| 1345 |
CPUArchState *env = s->c_cpu->env_ptr; |
| 1346 |
TaskState *ts = env->opaque; |
| 1347 |
|
| 1348 |
snprintf(buf, sizeof(buf),
|
| 1349 |
"Text=" TARGET_ABI_FMT_lx ";Data=" TARGET_ABI_FMT_lx |
| 1350 |
";Bss=" TARGET_ABI_FMT_lx,
|
| 1351 |
ts->info->code_offset, |
| 1352 |
ts->info->data_offset, |
| 1353 |
ts->info->data_offset); |
| 1354 |
put_packet(s, buf); |
| 1355 |
break;
|
| 1356 |
} |
| 1357 |
#else /* !CONFIG_USER_ONLY */ |
| 1358 |
else if (strncmp(p, "Rcmd,", 5) == 0) { |
| 1359 |
int len = strlen(p + 5); |
| 1360 |
|
| 1361 |
if ((len % 2) != 0) { |
| 1362 |
put_packet(s, "E01");
|
| 1363 |
break;
|
| 1364 |
} |
| 1365 |
hextomem(mem_buf, p + 5, len);
|
| 1366 |
len = len / 2;
|
| 1367 |
mem_buf[len++] = 0;
|
| 1368 |
qemu_chr_be_write(s->mon_chr, mem_buf, len); |
| 1369 |
put_packet(s, "OK");
|
| 1370 |
break;
|
| 1371 |
} |
| 1372 |
#endif /* !CONFIG_USER_ONLY */ |
| 1373 |
if (strncmp(p, "Supported", 9) == 0) { |
| 1374 |
snprintf(buf, sizeof(buf), "PacketSize=%x", MAX_PACKET_LENGTH); |
| 1375 |
#ifdef GDB_CORE_XML
|
| 1376 |
pstrcat(buf, sizeof(buf), ";qXfer:features:read+"); |
| 1377 |
#endif
|
| 1378 |
put_packet(s, buf); |
| 1379 |
break;
|
| 1380 |
} |
| 1381 |
#ifdef GDB_CORE_XML
|
| 1382 |
if (strncmp(p, "Xfer:features:read:", 19) == 0) { |
| 1383 |
const char *xml; |
| 1384 |
target_ulong total_len; |
| 1385 |
|
| 1386 |
gdb_has_xml = 1;
|
| 1387 |
p += 19;
|
| 1388 |
xml = get_feature_xml(p, &p); |
| 1389 |
if (!xml) {
|
| 1390 |
snprintf(buf, sizeof(buf), "E00"); |
| 1391 |
put_packet(s, buf); |
| 1392 |
break;
|
| 1393 |
} |
| 1394 |
|
| 1395 |
if (*p == ':') |
| 1396 |
p++; |
| 1397 |
addr = strtoul(p, (char **)&p, 16); |
| 1398 |
if (*p == ',') |
| 1399 |
p++; |
| 1400 |
len = strtoul(p, (char **)&p, 16); |
| 1401 |
|
| 1402 |
total_len = strlen(xml); |
| 1403 |
if (addr > total_len) {
|
| 1404 |
snprintf(buf, sizeof(buf), "E00"); |
| 1405 |
put_packet(s, buf); |
| 1406 |
break;
|
| 1407 |
} |
| 1408 |
if (len > (MAX_PACKET_LENGTH - 5) / 2) |
| 1409 |
len = (MAX_PACKET_LENGTH - 5) / 2; |
| 1410 |
if (len < total_len - addr) {
|
| 1411 |
buf[0] = 'm'; |
| 1412 |
len = memtox(buf + 1, xml + addr, len);
|
| 1413 |
} else {
|
| 1414 |
buf[0] = 'l'; |
| 1415 |
len = memtox(buf + 1, xml + addr, total_len - addr);
|
| 1416 |
} |
| 1417 |
put_packet_binary(s, buf, len + 1);
|
| 1418 |
break;
|
| 1419 |
} |
| 1420 |
#endif
|
| 1421 |
/* Unrecognised 'q' command. */
|
| 1422 |
goto unknown_command;
|
| 1423 |
|
| 1424 |
default:
|
| 1425 |
unknown_command:
|
| 1426 |
/* put empty packet */
|
| 1427 |
buf[0] = '\0'; |
| 1428 |
put_packet(s, buf); |
| 1429 |
break;
|
| 1430 |
} |
| 1431 |
return RS_IDLE;
|
| 1432 |
} |
| 1433 |
|
| 1434 |
void gdb_set_stop_cpu(CPUState *cpu)
|
| 1435 |
{
|
| 1436 |
gdbserver_state->c_cpu = cpu; |
| 1437 |
gdbserver_state->g_cpu = cpu; |
| 1438 |
} |
| 1439 |
|
| 1440 |
#ifndef CONFIG_USER_ONLY
|
| 1441 |
static void gdb_vm_state_change(void *opaque, int running, RunState state) |
| 1442 |
{
|
| 1443 |
GDBState *s = gdbserver_state; |
| 1444 |
CPUArchState *env = s->c_cpu->env_ptr; |
| 1445 |
CPUState *cpu = s->c_cpu; |
| 1446 |
char buf[256]; |
| 1447 |
const char *type; |
| 1448 |
int ret;
|
| 1449 |
|
| 1450 |
if (running || s->state == RS_INACTIVE) {
|
| 1451 |
return;
|
| 1452 |
} |
| 1453 |
/* Is there a GDB syscall waiting to be sent? */
|
| 1454 |
if (s->current_syscall_cb) {
|
| 1455 |
put_packet(s, s->syscall_buf); |
| 1456 |
return;
|
| 1457 |
} |
| 1458 |
switch (state) {
|
| 1459 |
case RUN_STATE_DEBUG:
|
| 1460 |
if (env->watchpoint_hit) {
|
| 1461 |
switch (env->watchpoint_hit->flags & BP_MEM_ACCESS) {
|
| 1462 |
case BP_MEM_READ:
|
| 1463 |
type = "r";
|
| 1464 |
break;
|
| 1465 |
case BP_MEM_ACCESS:
|
| 1466 |
type = "a";
|
| 1467 |
break;
|
| 1468 |
default:
|
| 1469 |
type = "";
|
| 1470 |
break;
|
| 1471 |
} |
| 1472 |
snprintf(buf, sizeof(buf),
|
| 1473 |
"T%02xthread:%02x;%swatch:" TARGET_FMT_lx ";", |
| 1474 |
GDB_SIGNAL_TRAP, cpu_index(cpu), type, |
| 1475 |
env->watchpoint_hit->vaddr); |
| 1476 |
env->watchpoint_hit = NULL;
|
| 1477 |
goto send_packet;
|
| 1478 |
} |
| 1479 |
tb_flush(env); |
| 1480 |
ret = GDB_SIGNAL_TRAP; |
| 1481 |
break;
|
| 1482 |
case RUN_STATE_PAUSED:
|
| 1483 |
ret = GDB_SIGNAL_INT; |
| 1484 |
break;
|
| 1485 |
case RUN_STATE_SHUTDOWN:
|
| 1486 |
ret = GDB_SIGNAL_QUIT; |
| 1487 |
break;
|
| 1488 |
case RUN_STATE_IO_ERROR:
|
| 1489 |
ret = GDB_SIGNAL_IO; |
| 1490 |
break;
|
| 1491 |
case RUN_STATE_WATCHDOG:
|
| 1492 |
ret = GDB_SIGNAL_ALRM; |
| 1493 |
break;
|
| 1494 |
case RUN_STATE_INTERNAL_ERROR:
|
| 1495 |
ret = GDB_SIGNAL_ABRT; |
| 1496 |
break;
|
| 1497 |
case RUN_STATE_SAVE_VM:
|
| 1498 |
case RUN_STATE_RESTORE_VM:
|
| 1499 |
return;
|
| 1500 |
case RUN_STATE_FINISH_MIGRATE:
|
| 1501 |
ret = GDB_SIGNAL_XCPU; |
| 1502 |
break;
|
| 1503 |
default:
|
| 1504 |
ret = GDB_SIGNAL_UNKNOWN; |
| 1505 |
break;
|
| 1506 |
} |
| 1507 |
snprintf(buf, sizeof(buf), "T%02xthread:%02x;", ret, cpu_index(cpu)); |
| 1508 |
|
| 1509 |
send_packet:
|
| 1510 |
put_packet(s, buf); |
| 1511 |
|
| 1512 |
/* disable single step if it was enabled */
|
| 1513 |
cpu_single_step(cpu, 0);
|
| 1514 |
} |
| 1515 |
#endif
|
| 1516 |
|
| 1517 |
/* Send a gdb syscall request.
|
| 1518 |
This accepts limited printf-style format specifiers, specifically:
|
| 1519 |
%x - target_ulong argument printed in hex.
|
| 1520 |
%lx - 64-bit argument printed in hex.
|
| 1521 |
%s - string pointer (target_ulong) and length (int) pair. */
|
| 1522 |
void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...) |
| 1523 |
{
|
| 1524 |
va_list va; |
| 1525 |
char *p;
|
| 1526 |
char *p_end;
|
| 1527 |
target_ulong addr; |
| 1528 |
uint64_t i64; |
| 1529 |
GDBState *s; |
| 1530 |
|
| 1531 |
s = gdbserver_state; |
| 1532 |
if (!s)
|
| 1533 |
return;
|
| 1534 |
s->current_syscall_cb = cb; |
| 1535 |
#ifndef CONFIG_USER_ONLY
|
| 1536 |
vm_stop(RUN_STATE_DEBUG); |
| 1537 |
#endif
|
| 1538 |
va_start(va, fmt); |
| 1539 |
p = s->syscall_buf; |
| 1540 |
p_end = &s->syscall_buf[sizeof(s->syscall_buf)];
|
| 1541 |
*(p++) = 'F';
|
| 1542 |
while (*fmt) {
|
| 1543 |
if (*fmt == '%') { |
| 1544 |
fmt++; |
| 1545 |
switch (*fmt++) {
|
| 1546 |
case 'x': |
| 1547 |
addr = va_arg(va, target_ulong); |
| 1548 |
p += snprintf(p, p_end - p, TARGET_FMT_lx, addr); |
| 1549 |
break;
|
| 1550 |
case 'l': |
| 1551 |
if (*(fmt++) != 'x') |
| 1552 |
goto bad_format;
|
| 1553 |
i64 = va_arg(va, uint64_t); |
| 1554 |
p += snprintf(p, p_end - p, "%" PRIx64, i64);
|
| 1555 |
break;
|
| 1556 |
case 's': |
| 1557 |
addr = va_arg(va, target_ulong); |
| 1558 |
p += snprintf(p, p_end - p, TARGET_FMT_lx "/%x",
|
| 1559 |
addr, va_arg(va, int));
|
| 1560 |
break;
|
| 1561 |
default:
|
| 1562 |
bad_format:
|
| 1563 |
fprintf(stderr, "gdbstub: Bad syscall format string '%s'\n",
|
| 1564 |
fmt - 1);
|
| 1565 |
break;
|
| 1566 |
} |
| 1567 |
} else {
|
| 1568 |
*(p++) = *(fmt++); |
| 1569 |
} |
| 1570 |
} |
| 1571 |
*p = 0;
|
| 1572 |
va_end(va); |
| 1573 |
#ifdef CONFIG_USER_ONLY
|
| 1574 |
put_packet(s, s->syscall_buf); |
| 1575 |
gdb_handlesig(s->c_cpu, 0);
|
| 1576 |
#else
|
| 1577 |
/* In this case wait to send the syscall packet until notification that
|
| 1578 |
the CPU has stopped. This must be done because if the packet is sent
|
| 1579 |
now the reply from the syscall request could be received while the CPU
|
| 1580 |
is still in the running state, which can cause packets to be dropped
|
| 1581 |
and state transition 'T' packets to be sent while the syscall is still
|
| 1582 |
being processed. */
|
| 1583 |
cpu_exit(s->c_cpu); |
| 1584 |
#endif
|
| 1585 |
} |
| 1586 |
|
| 1587 |
static void gdb_read_byte(GDBState *s, int ch) |
| 1588 |
{
|
| 1589 |
int i, csum;
|
| 1590 |
uint8_t reply; |
| 1591 |
|
| 1592 |
#ifndef CONFIG_USER_ONLY
|
| 1593 |
if (s->last_packet_len) {
|
| 1594 |
/* Waiting for a response to the last packet. If we see the start
|
| 1595 |
of a new command then abandon the previous response. */
|
| 1596 |
if (ch == '-') { |
| 1597 |
#ifdef DEBUG_GDB
|
| 1598 |
printf("Got NACK, retransmitting\n");
|
| 1599 |
#endif
|
| 1600 |
put_buffer(s, (uint8_t *)s->last_packet, s->last_packet_len); |
| 1601 |
} |
| 1602 |
#ifdef DEBUG_GDB
|
| 1603 |
else if (ch == '+') |
| 1604 |
printf("Got ACK\n");
|
| 1605 |
else
|
| 1606 |
printf("Got '%c' when expecting ACK/NACK\n", ch);
|
| 1607 |
#endif
|
| 1608 |
if (ch == '+' || ch == '$') |
| 1609 |
s->last_packet_len = 0;
|
| 1610 |
if (ch != '$') |
| 1611 |
return;
|
| 1612 |
} |
| 1613 |
if (runstate_is_running()) {
|
| 1614 |
/* when the CPU is running, we cannot do anything except stop
|
| 1615 |
it when receiving a char */
|
| 1616 |
vm_stop(RUN_STATE_PAUSED); |
| 1617 |
} else
|
| 1618 |
#endif
|
| 1619 |
{
|
| 1620 |
switch(s->state) {
|
| 1621 |
case RS_IDLE:
|
| 1622 |
if (ch == '$') { |
| 1623 |
s->line_buf_index = 0;
|
| 1624 |
s->state = RS_GETLINE; |
| 1625 |
} |
| 1626 |
break;
|
| 1627 |
case RS_GETLINE:
|
| 1628 |
if (ch == '#') { |
| 1629 |
s->state = RS_CHKSUM1; |
| 1630 |
} else if (s->line_buf_index >= sizeof(s->line_buf) - 1) { |
| 1631 |
s->state = RS_IDLE; |
| 1632 |
} else {
|
| 1633 |
s->line_buf[s->line_buf_index++] = ch; |
| 1634 |
} |
| 1635 |
break;
|
| 1636 |
case RS_CHKSUM1:
|
| 1637 |
s->line_buf[s->line_buf_index] = '\0';
|
| 1638 |
s->line_csum = fromhex(ch) << 4;
|
| 1639 |
s->state = RS_CHKSUM2; |
| 1640 |
break;
|
| 1641 |
case RS_CHKSUM2:
|
| 1642 |
s->line_csum |= fromhex(ch); |
| 1643 |
csum = 0;
|
| 1644 |
for(i = 0; i < s->line_buf_index; i++) { |
| 1645 |
csum += s->line_buf[i]; |
| 1646 |
} |
| 1647 |
if (s->line_csum != (csum & 0xff)) { |
| 1648 |
reply = '-';
|
| 1649 |
put_buffer(s, &reply, 1);
|
| 1650 |
s->state = RS_IDLE; |
| 1651 |
} else {
|
| 1652 |
reply = '+';
|
| 1653 |
put_buffer(s, &reply, 1);
|
| 1654 |
s->state = gdb_handle_packet(s, s->line_buf); |
| 1655 |
} |
| 1656 |
break;
|
| 1657 |
default:
|
| 1658 |
abort(); |
| 1659 |
} |
| 1660 |
} |
| 1661 |
} |
| 1662 |
|
| 1663 |
/* Tell the remote gdb that the process has exited. */
|
| 1664 |
void gdb_exit(CPUArchState *env, int code) |
| 1665 |
{
|
| 1666 |
GDBState *s; |
| 1667 |
char buf[4]; |
| 1668 |
|
| 1669 |
s = gdbserver_state; |
| 1670 |
if (!s) {
|
| 1671 |
return;
|
| 1672 |
} |
| 1673 |
#ifdef CONFIG_USER_ONLY
|
| 1674 |
if (gdbserver_fd < 0 || s->fd < 0) { |
| 1675 |
return;
|
| 1676 |
} |
| 1677 |
#endif
|
| 1678 |
|
| 1679 |
snprintf(buf, sizeof(buf), "W%02x", (uint8_t)code); |
| 1680 |
put_packet(s, buf); |
| 1681 |
|
| 1682 |
#ifndef CONFIG_USER_ONLY
|
| 1683 |
if (s->chr) {
|
| 1684 |
qemu_chr_delete(s->chr); |
| 1685 |
} |
| 1686 |
#endif
|
| 1687 |
} |
| 1688 |
|
| 1689 |
#ifdef CONFIG_USER_ONLY
|
| 1690 |
int
|
| 1691 |
gdb_queuesig (void)
|
| 1692 |
{
|
| 1693 |
GDBState *s; |
| 1694 |
|
| 1695 |
s = gdbserver_state; |
| 1696 |
|
| 1697 |
if (gdbserver_fd < 0 || s->fd < 0) |
| 1698 |
return 0; |
| 1699 |
else
|
| 1700 |
return 1; |
| 1701 |
} |
| 1702 |
|
| 1703 |
int
|
| 1704 |
gdb_handlesig(CPUState *cpu, int sig)
|
| 1705 |
{
|
| 1706 |
CPUArchState *env = cpu->env_ptr; |
| 1707 |
GDBState *s; |
| 1708 |
char buf[256]; |
| 1709 |
int n;
|
| 1710 |
|
| 1711 |
s = gdbserver_state; |
| 1712 |
if (gdbserver_fd < 0 || s->fd < 0) { |
| 1713 |
return sig;
|
| 1714 |
} |
| 1715 |
|
| 1716 |
/* disable single step if it was enabled */
|
| 1717 |
cpu_single_step(cpu, 0);
|
| 1718 |
tb_flush(env); |
| 1719 |
|
| 1720 |
if (sig != 0) { |
| 1721 |
snprintf(buf, sizeof(buf), "S%02x", target_signal_to_gdb(sig)); |
| 1722 |
put_packet(s, buf); |
| 1723 |
} |
| 1724 |
/* put_packet() might have detected that the peer terminated the
|
| 1725 |
connection. */
|
| 1726 |
if (s->fd < 0) { |
| 1727 |
return sig;
|
| 1728 |
} |
| 1729 |
|
| 1730 |
sig = 0;
|
| 1731 |
s->state = RS_IDLE; |
| 1732 |
s->running_state = 0;
|
| 1733 |
while (s->running_state == 0) { |
| 1734 |
n = read(s->fd, buf, 256);
|
| 1735 |
if (n > 0) { |
| 1736 |
int i;
|
| 1737 |
|
| 1738 |
for (i = 0; i < n; i++) { |
| 1739 |
gdb_read_byte(s, buf[i]); |
| 1740 |
} |
| 1741 |
} else if (n == 0 || errno != EAGAIN) { |
| 1742 |
/* XXX: Connection closed. Should probably wait for another
|
| 1743 |
connection before continuing. */
|
| 1744 |
return sig;
|
| 1745 |
} |
| 1746 |
} |
| 1747 |
sig = s->signal; |
| 1748 |
s->signal = 0;
|
| 1749 |
return sig;
|
| 1750 |
} |
| 1751 |
|
| 1752 |
/* Tell the remote gdb that the process has exited due to SIG. */
|
| 1753 |
void gdb_signalled(CPUArchState *env, int sig) |
| 1754 |
{
|
| 1755 |
GDBState *s; |
| 1756 |
char buf[4]; |
| 1757 |
|
| 1758 |
s = gdbserver_state; |
| 1759 |
if (gdbserver_fd < 0 || s->fd < 0) { |
| 1760 |
return;
|
| 1761 |
} |
| 1762 |
|
| 1763 |
snprintf(buf, sizeof(buf), "X%02x", target_signal_to_gdb(sig)); |
| 1764 |
put_packet(s, buf); |
| 1765 |
} |
| 1766 |
|
| 1767 |
static void gdb_accept(void) |
| 1768 |
{
|
| 1769 |
GDBState *s; |
| 1770 |
struct sockaddr_in sockaddr;
|
| 1771 |
socklen_t len; |
| 1772 |
int fd;
|
| 1773 |
|
| 1774 |
for(;;) {
|
| 1775 |
len = sizeof(sockaddr);
|
| 1776 |
fd = accept(gdbserver_fd, (struct sockaddr *)&sockaddr, &len);
|
| 1777 |
if (fd < 0 && errno != EINTR) { |
| 1778 |
perror("accept");
|
| 1779 |
return;
|
| 1780 |
} else if (fd >= 0) { |
| 1781 |
#ifndef _WIN32
|
| 1782 |
fcntl(fd, F_SETFD, FD_CLOEXEC); |
| 1783 |
#endif
|
| 1784 |
break;
|
| 1785 |
} |
| 1786 |
} |
| 1787 |
|
| 1788 |
/* set short latency */
|
| 1789 |
socket_set_nodelay(fd); |
| 1790 |
|
| 1791 |
s = g_malloc0(sizeof(GDBState));
|
| 1792 |
s->c_cpu = first_cpu; |
| 1793 |
s->g_cpu = first_cpu; |
| 1794 |
s->fd = fd; |
| 1795 |
gdb_has_xml = 0;
|
| 1796 |
|
| 1797 |
gdbserver_state = s; |
| 1798 |
|
| 1799 |
fcntl(fd, F_SETFL, O_NONBLOCK); |
| 1800 |
} |
| 1801 |
|
| 1802 |
static int gdbserver_open(int port) |
| 1803 |
{
|
| 1804 |
struct sockaddr_in sockaddr;
|
| 1805 |
int fd, val, ret;
|
| 1806 |
|
| 1807 |
fd = socket(PF_INET, SOCK_STREAM, 0);
|
| 1808 |
if (fd < 0) { |
| 1809 |
perror("socket");
|
| 1810 |
return -1; |
| 1811 |
} |
| 1812 |
#ifndef _WIN32
|
| 1813 |
fcntl(fd, F_SETFD, FD_CLOEXEC); |
| 1814 |
#endif
|
| 1815 |
|
| 1816 |
/* allow fast reuse */
|
| 1817 |
val = 1;
|
| 1818 |
qemu_setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
|
| 1819 |
|
| 1820 |
sockaddr.sin_family = AF_INET; |
| 1821 |
sockaddr.sin_port = htons(port); |
| 1822 |
sockaddr.sin_addr.s_addr = 0;
|
| 1823 |
ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)); |
| 1824 |
if (ret < 0) { |
| 1825 |
perror("bind");
|
| 1826 |
close(fd); |
| 1827 |
return -1; |
| 1828 |
} |
| 1829 |
ret = listen(fd, 0);
|
| 1830 |
if (ret < 0) { |
| 1831 |
perror("listen");
|
| 1832 |
close(fd); |
| 1833 |
return -1; |
| 1834 |
} |
| 1835 |
return fd;
|
| 1836 |
} |
| 1837 |
|
| 1838 |
int gdbserver_start(int port) |
| 1839 |
{
|
| 1840 |
gdbserver_fd = gdbserver_open(port); |
| 1841 |
if (gdbserver_fd < 0) |
| 1842 |
return -1; |
| 1843 |
/* accept connections */
|
| 1844 |
gdb_accept(); |
| 1845 |
return 0; |
| 1846 |
} |
| 1847 |
|
| 1848 |
/* Disable gdb stub for child processes. */
|
| 1849 |
void gdbserver_fork(CPUArchState *env)
|
| 1850 |
{
|
| 1851 |
GDBState *s = gdbserver_state; |
| 1852 |
if (gdbserver_fd < 0 || s->fd < 0) |
| 1853 |
return;
|
| 1854 |
close(s->fd); |
| 1855 |
s->fd = -1;
|
| 1856 |
cpu_breakpoint_remove_all(env, BP_GDB); |
| 1857 |
cpu_watchpoint_remove_all(env, BP_GDB); |
| 1858 |
} |
| 1859 |
#else
|
| 1860 |
static int gdb_chr_can_receive(void *opaque) |
| 1861 |
{
|
| 1862 |
/* We can handle an arbitrarily large amount of data.
|
| 1863 |
Pick the maximum packet size, which is as good as anything. */
|
| 1864 |
return MAX_PACKET_LENGTH;
|
| 1865 |
} |
| 1866 |
|
| 1867 |
static void gdb_chr_receive(void *opaque, const uint8_t *buf, int size) |
| 1868 |
{
|
| 1869 |
int i;
|
| 1870 |
|
| 1871 |
for (i = 0; i < size; i++) { |
| 1872 |
gdb_read_byte(gdbserver_state, buf[i]); |
| 1873 |
} |
| 1874 |
} |
| 1875 |
|
| 1876 |
static void gdb_chr_event(void *opaque, int event) |
| 1877 |
{
|
| 1878 |
switch (event) {
|
| 1879 |
case CHR_EVENT_OPENED:
|
| 1880 |
vm_stop(RUN_STATE_PAUSED); |
| 1881 |
gdb_has_xml = 0;
|
| 1882 |
break;
|
| 1883 |
default:
|
| 1884 |
break;
|
| 1885 |
} |
| 1886 |
} |
| 1887 |
|
| 1888 |
static void gdb_monitor_output(GDBState *s, const char *msg, int len) |
| 1889 |
{
|
| 1890 |
char buf[MAX_PACKET_LENGTH];
|
| 1891 |
|
| 1892 |
buf[0] = 'O'; |
| 1893 |
if (len > (MAX_PACKET_LENGTH/2) - 1) |
| 1894 |
len = (MAX_PACKET_LENGTH/2) - 1; |
| 1895 |
memtohex(buf + 1, (uint8_t *)msg, len);
|
| 1896 |
put_packet(s, buf); |
| 1897 |
} |
| 1898 |
|
| 1899 |
static int gdb_monitor_write(CharDriverState *chr, const uint8_t *buf, int len) |
| 1900 |
{
|
| 1901 |
const char *p = (const char *)buf; |
| 1902 |
int max_sz;
|
| 1903 |
|
| 1904 |
max_sz = (sizeof(gdbserver_state->last_packet) - 2) / 2; |
| 1905 |
for (;;) {
|
| 1906 |
if (len <= max_sz) {
|
| 1907 |
gdb_monitor_output(gdbserver_state, p, len); |
| 1908 |
break;
|
| 1909 |
} |
| 1910 |
gdb_monitor_output(gdbserver_state, p, max_sz); |
| 1911 |
p += max_sz; |
| 1912 |
len -= max_sz; |
| 1913 |
} |
| 1914 |
return len;
|
| 1915 |
} |
| 1916 |
|
| 1917 |
#ifndef _WIN32
|
| 1918 |
static void gdb_sigterm_handler(int signal) |
| 1919 |
{
|
| 1920 |
if (runstate_is_running()) {
|
| 1921 |
vm_stop(RUN_STATE_PAUSED); |
| 1922 |
} |
| 1923 |
} |
| 1924 |
#endif
|
| 1925 |
|
| 1926 |
int gdbserver_start(const char *device) |
| 1927 |
{
|
| 1928 |
GDBState *s; |
| 1929 |
char gdbstub_device_name[128]; |
| 1930 |
CharDriverState *chr = NULL;
|
| 1931 |
CharDriverState *mon_chr; |
| 1932 |
|
| 1933 |
if (!device)
|
| 1934 |
return -1; |
| 1935 |
if (strcmp(device, "none") != 0) { |
| 1936 |
if (strstart(device, "tcp:", NULL)) { |
| 1937 |
/* enforce required TCP attributes */
|
| 1938 |
snprintf(gdbstub_device_name, sizeof(gdbstub_device_name),
|
| 1939 |
"%s,nowait,nodelay,server", device);
|
| 1940 |
device = gdbstub_device_name; |
| 1941 |
} |
| 1942 |
#ifndef _WIN32
|
| 1943 |
else if (strcmp(device, "stdio") == 0) { |
| 1944 |
struct sigaction act;
|
| 1945 |
|
| 1946 |
memset(&act, 0, sizeof(act)); |
| 1947 |
act.sa_handler = gdb_sigterm_handler; |
| 1948 |
sigaction(SIGINT, &act, NULL);
|
| 1949 |
} |
| 1950 |
#endif
|
| 1951 |
chr = qemu_chr_new("gdb", device, NULL); |
| 1952 |
if (!chr)
|
| 1953 |
return -1; |
| 1954 |
|
| 1955 |
qemu_chr_fe_claim_no_fail(chr); |
| 1956 |
qemu_chr_add_handlers(chr, gdb_chr_can_receive, gdb_chr_receive, |
| 1957 |
gdb_chr_event, NULL);
|
| 1958 |
} |
| 1959 |
|
| 1960 |
s = gdbserver_state; |
| 1961 |
if (!s) {
|
| 1962 |
s = g_malloc0(sizeof(GDBState));
|
| 1963 |
gdbserver_state = s; |
| 1964 |
|
| 1965 |
qemu_add_vm_change_state_handler(gdb_vm_state_change, NULL);
|
| 1966 |
|
| 1967 |
/* Initialize a monitor terminal for gdb */
|
| 1968 |
mon_chr = g_malloc0(sizeof(*mon_chr));
|
| 1969 |
mon_chr->chr_write = gdb_monitor_write; |
| 1970 |
monitor_init(mon_chr, 0);
|
| 1971 |
} else {
|
| 1972 |
if (s->chr)
|
| 1973 |
qemu_chr_delete(s->chr); |
| 1974 |
mon_chr = s->mon_chr; |
| 1975 |
memset(s, 0, sizeof(GDBState)); |
| 1976 |
} |
| 1977 |
s->c_cpu = first_cpu; |
| 1978 |
s->g_cpu = first_cpu; |
| 1979 |
s->chr = chr; |
| 1980 |
s->state = chr ? RS_IDLE : RS_INACTIVE; |
| 1981 |
s->mon_chr = mon_chr; |
| 1982 |
s->current_syscall_cb = NULL;
|
| 1983 |
|
| 1984 |
return 0; |
| 1985 |
} |
| 1986 |
#endif
|