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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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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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#include "qemu.h" |
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#else
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#include "qemu-char.h" |
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#include "sysemu.h" |
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#include "gdbstub.h" |
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#endif
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#define MAX_PACKET_LENGTH 4096 |
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#include "qemu_socket.h" |
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#ifdef _WIN32
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/* XXX: these constants may be independent of the host ones even for Unix */
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#ifndef SIGTRAP
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#define SIGTRAP 5 |
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#endif
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#ifndef SIGINT
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#define SIGINT 2 |
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#endif
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#else
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#include <signal.h> |
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#endif
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|
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//#define DEBUG_GDB
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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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enum RSState {
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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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RS_SYSCALL, |
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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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#endif
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} GDBState; |
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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; |
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static GDBState *gdbserver_state;
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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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#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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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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for(;;) {
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ret = recv(s->fd, &ch, 1, 0); |
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if (ret < 0) { |
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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; |
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} else if (ret == 0) { |
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close(s->fd); |
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s->fd = -1;
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return -1; |
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} else {
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break;
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} |
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} |
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return ch;
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} |
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#endif
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static gdb_syscall_complete_cb gdb_current_syscall_cb;
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enum {
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GDB_SYS_UNKNOWN, |
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GDB_SYS_ENABLED, |
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GDB_SYS_DISABLED, |
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} gdb_syscall_mode; |
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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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{ |
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if (gdb_syscall_mode == GDB_SYS_UNKNOWN) {
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gdb_syscall_mode = (gdbserver_state ? GDB_SYS_ENABLED |
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: GDB_SYS_DISABLED); |
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} |
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return gdb_syscall_mode == GDB_SYS_ENABLED;
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} |
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/* Resume execution. */
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static inline void gdb_continue(GDBState *s) |
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{ |
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#ifdef CONFIG_USER_ONLY
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s->running_state = 1;
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#else
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vm_start(); |
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#endif
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} |
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static void put_buffer(GDBState *s, const uint8_t *buf, int len) |
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{ |
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#ifdef CONFIG_USER_ONLY
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int ret;
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while (len > 0) { |
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ret = send(s->fd, buf, len, 0);
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if (ret < 0) { |
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if (errno != EINTR && errno != EAGAIN)
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return;
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} else {
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buf += ret; |
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len -= ret; |
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} |
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} |
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#else
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qemu_chr_write(s->chr, buf, len); |
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#endif
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} |
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static inline int fromhex(int v) |
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{ |
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if (v >= '0' && v <= '9') |
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return v - '0'; |
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else if (v >= 'A' && v <= 'F') |
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return v - 'A' + 10; |
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else if (v >= 'a' && v <= 'f') |
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return v - 'a' + 10; |
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else
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return 0; |
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} |
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static inline int tohex(int v) |
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{ |
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if (v < 10) |
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return v + '0'; |
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else
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return v - 10 + 'a'; |
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} |
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static void memtohex(char *buf, const uint8_t *mem, int len) |
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{ |
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int i, c;
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char *q;
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q = buf; |
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for(i = 0; i < len; i++) { |
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c = mem[i]; |
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*q++ = tohex(c >> 4);
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*q++ = tohex(c & 0xf);
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} |
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*q = '\0';
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} |
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static void hextomem(uint8_t *mem, const char *buf, int len) |
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{ |
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int i;
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for(i = 0; i < len; i++) { |
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mem[i] = (fromhex(buf[0]) << 4) | fromhex(buf[1]); |
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buf += 2;
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} |
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} |
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/* return -1 if error, 0 if OK */
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static int put_packet_binary(GDBState *s, const char *buf, int len) |
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{ |
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int csum, i;
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uint8_t *p; |
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for(;;) {
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p = s->last_packet; |
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*(p++) = '$';
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memcpy(p, buf, len); |
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p += len; |
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csum = 0;
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for(i = 0; i < len; i++) { |
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csum += buf[i]; |
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} |
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*(p++) = '#';
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*(p++) = tohex((csum >> 4) & 0xf); |
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*(p++) = tohex((csum) & 0xf);
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s->last_packet_len = p - s->last_packet; |
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put_buffer(s, (uint8_t *)s->last_packet, s->last_packet_len); |
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#ifdef CONFIG_USER_ONLY
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i = get_char(s); |
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if (i < 0) |
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return -1; |
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if (i == '+') |
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break;
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#else
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break;
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#endif
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} |
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return 0; |
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} |
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/* return -1 if error, 0 if OK */
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static int put_packet(GDBState *s, const char *buf) |
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{ |
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#ifdef DEBUG_GDB
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printf("reply='%s'\n", buf);
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#endif
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return put_packet_binary(s, buf, strlen(buf));
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} |
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/* The GDB remote protocol transfers values in target byte order. This means
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we can use the raw memory access routines to access the value buffer.
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Conveniently, these also handle the case where the buffer is mis-aligned.
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*/
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#define GET_REG8(val) do { \ |
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stb_p(mem_buf, val); \ |
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return 1; \ |
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} while(0) |
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#define GET_REG16(val) do { \ |
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stw_p(mem_buf, val); \ |
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return 2; \ |
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} while(0) |
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#define GET_REG32(val) do { \ |
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stl_p(mem_buf, val); \ |
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return 4; \ |
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} while(0) |
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#define GET_REG64(val) do { \ |
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stq_p(mem_buf, val); \ |
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return 8; \ |
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} while(0) |
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#if TARGET_LONG_BITS == 64 |
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#define GET_REGL(val) GET_REG64(val)
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#define ldtul_p(addr) ldq_p(addr)
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#else
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#define GET_REGL(val) GET_REG32(val)
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#define ldtul_p(addr) ldl_p(addr)
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#endif
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#if defined(TARGET_I386)
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#ifdef TARGET_X86_64
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static const int gpr_map[16] = { |
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R_EAX, R_EBX, R_ECX, R_EDX, R_ESI, R_EDI, R_EBP, R_ESP, |
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8, 9, 10, 11, 12, 13, 14, 15 |
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}; |
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#else
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static const int gpr_map[8] = {0, 1, 2, 3, 4, 5, 6, 7}; |
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#endif
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#define NUM_CORE_REGS (CPU_NB_REGS * 2 + 25) |
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static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n) |
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{ |
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if (n < CPU_NB_REGS) {
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GET_REGL(env->regs[gpr_map[n]]); |
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} else if (n >= CPU_NB_REGS + 8 && n < CPU_NB_REGS + 16) { |
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/* FIXME: byteswap float values. */
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#ifdef USE_X86LDOUBLE
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memcpy(mem_buf, &env->fpregs[n - (CPU_NB_REGS + 8)], 10); |
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#else
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memset(mem_buf, 0, 10); |
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#endif
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return 10; |
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} else if (n >= CPU_NB_REGS + 24) { |
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n -= CPU_NB_REGS + 24;
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if (n < CPU_NB_REGS) {
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stq_p(mem_buf, env->xmm_regs[n].XMM_Q(0));
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stq_p(mem_buf + 8, env->xmm_regs[n].XMM_Q(1)); |
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return 16; |
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} else if (n == CPU_NB_REGS) { |
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GET_REG32(env->mxcsr); |
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} |
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} else {
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n -= CPU_NB_REGS; |
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switch (n) {
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case 0: GET_REGL(env->eip); |
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case 1: GET_REG32(env->eflags); |
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case 2: GET_REG32(env->segs[R_CS].selector); |
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case 3: GET_REG32(env->segs[R_SS].selector); |
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case 4: GET_REG32(env->segs[R_DS].selector); |
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case 5: GET_REG32(env->segs[R_ES].selector); |
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case 6: GET_REG32(env->segs[R_FS].selector); |
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case 7: GET_REG32(env->segs[R_GS].selector); |
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/* 8...15 x87 regs. */
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case 16: GET_REG32(env->fpuc); |
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case 17: GET_REG32((env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11); |
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case 18: GET_REG32(0); /* ftag */ |
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case 19: GET_REG32(0); /* fiseg */ |
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case 20: GET_REG32(0); /* fioff */ |
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case 21: GET_REG32(0); /* foseg */ |
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case 22: GET_REG32(0); /* fooff */ |
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case 23: GET_REG32(0); /* fop */ |
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/* 24+ xmm regs. */
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} |
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} |
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return 0; |
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} |
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static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int i) |
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{ |
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uint32_t tmp; |
359 |
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if (i < CPU_NB_REGS) {
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env->regs[gpr_map[i]] = ldtul_p(mem_buf); |
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return sizeof(target_ulong); |
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} else if (i >= CPU_NB_REGS + 8 && i < CPU_NB_REGS + 16) { |
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i -= CPU_NB_REGS + 8;
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#ifdef USE_X86LDOUBLE
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memcpy(&env->fpregs[i], mem_buf, 10);
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#endif
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return 10; |
369 |
} else if (i >= CPU_NB_REGS + 24) { |
370 |
i -= CPU_NB_REGS + 24;
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if (i < CPU_NB_REGS) {
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env->xmm_regs[i].XMM_Q(0) = ldq_p(mem_buf);
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env->xmm_regs[i].XMM_Q(1) = ldq_p(mem_buf + 8); |
374 |
return 16; |
375 |
} else if (i == CPU_NB_REGS) { |
376 |
env->mxcsr = ldl_p(mem_buf); |
377 |
return 4; |
378 |
} |
379 |
} else {
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i -= CPU_NB_REGS; |
381 |
switch (i) {
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382 |
case 0: env->eip = ldtul_p(mem_buf); return sizeof(target_ulong); |
383 |
case 1: env->eflags = ldl_p(mem_buf); return 4; |
384 |
#if defined(CONFIG_USER_ONLY)
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385 |
#define LOAD_SEG(index, sreg)\
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tmp = ldl_p(mem_buf);\ |
387 |
if (tmp != env->segs[sreg].selector)\
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cpu_x86_load_seg(env, sreg, tmp); |
389 |
#else
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390 |
/* FIXME: Honor segment registers. Needs to avoid raising an exception
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391 |
when the selector is invalid. */
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392 |
#define LOAD_SEG(index, sreg) do {} while(0) |
393 |
#endif
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394 |
case 2: LOAD_SEG(10, R_CS); return 4; |
395 |
case 3: LOAD_SEG(11, R_SS); return 4; |
396 |
case 4: LOAD_SEG(12, R_DS); return 4; |
397 |
case 5: LOAD_SEG(13, R_ES); return 4; |
398 |
case 6: LOAD_SEG(14, R_FS); return 4; |
399 |
case 7: LOAD_SEG(15, R_GS); return 4; |
400 |
/* 8...15 x87 regs. */
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401 |
case 16: env->fpuc = ldl_p(mem_buf); return 4; |
402 |
case 17: |
403 |
tmp = ldl_p(mem_buf); |
404 |
env->fpstt = (tmp >> 11) & 7; |
405 |
env->fpus = tmp & ~0x3800;
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406 |
return 4; |
407 |
case 18: /* ftag */ return 4; |
408 |
case 19: /* fiseg */ return 4; |
409 |
case 20: /* fioff */ return 4; |
410 |
case 21: /* foseg */ return 4; |
411 |
case 22: /* fooff */ return 4; |
412 |
case 23: /* fop */ return 4; |
413 |
/* 24+ xmm regs. */
|
414 |
} |
415 |
} |
416 |
/* Unrecognised register. */
|
417 |
return 0; |
418 |
} |
419 |
|
420 |
#elif defined (TARGET_PPC)
|
421 |
|
422 |
#define NUM_CORE_REGS 71 |
423 |
|
424 |
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n) |
425 |
{ |
426 |
if (n < 32) { |
427 |
/* gprs */
|
428 |
GET_REGL(env->gpr[n]); |
429 |
} else if (n < 64) { |
430 |
/* fprs */
|
431 |
stfq_p(mem_buf, env->fpr[n]); |
432 |
return 8; |
433 |
} else {
|
434 |
switch (n) {
|
435 |
case 64: GET_REGL(env->nip); |
436 |
case 65: GET_REGL(env->msr); |
437 |
case 66: |
438 |
{ |
439 |
uint32_t cr = 0;
|
440 |
int i;
|
441 |
for (i = 0; i < 8; i++) |
442 |
cr |= env->crf[i] << (32 - ((i + 1) * 4)); |
443 |
GET_REG32(cr); |
444 |
} |
445 |
case 67: GET_REGL(env->lr); |
446 |
case 68: GET_REGL(env->ctr); |
447 |
case 69: GET_REGL(env->xer); |
448 |
case 70: GET_REG32(0); /* fpscr */ |
449 |
} |
450 |
} |
451 |
return 0; |
452 |
} |
453 |
|
454 |
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n) |
455 |
{ |
456 |
if (n < 32) { |
457 |
/* gprs */
|
458 |
env->gpr[n] = ldtul_p(mem_buf); |
459 |
return sizeof(target_ulong); |
460 |
} else if (n < 64) { |
461 |
/* fprs */
|
462 |
env->fpr[n] = ldfq_p(mem_buf); |
463 |
return 8; |
464 |
} else {
|
465 |
switch (n) {
|
466 |
case 64: |
467 |
env->nip = ldtul_p(mem_buf); |
468 |
return sizeof(target_ulong); |
469 |
case 65: |
470 |
ppc_store_msr(env, ldtul_p(mem_buf)); |
471 |
return sizeof(target_ulong); |
472 |
case 66: |
473 |
{ |
474 |
uint32_t cr = ldl_p(mem_buf); |
475 |
int i;
|
476 |
for (i = 0; i < 8; i++) |
477 |
env->crf[i] = (cr >> (32 - ((i + 1) * 4))) & 0xF; |
478 |
return 4; |
479 |
} |
480 |
case 67: |
481 |
env->lr = ldtul_p(mem_buf); |
482 |
return sizeof(target_ulong); |
483 |
case 68: |
484 |
env->ctr = ldtul_p(mem_buf); |
485 |
return sizeof(target_ulong); |
486 |
case 69: |
487 |
env->xer = ldtul_p(mem_buf); |
488 |
return sizeof(target_ulong); |
489 |
case 70: |
490 |
/* fpscr */
|
491 |
return 4; |
492 |
} |
493 |
} |
494 |
return 0; |
495 |
} |
496 |
|
497 |
#elif defined (TARGET_SPARC)
|
498 |
|
499 |
#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
|
500 |
#define NUM_CORE_REGS 86 |
501 |
#else
|
502 |
#define NUM_CORE_REGS 73 |
503 |
#endif
|
504 |
|
505 |
#ifdef TARGET_ABI32
|
506 |
#define GET_REGA(val) GET_REG32(val)
|
507 |
#else
|
508 |
#define GET_REGA(val) GET_REGL(val)
|
509 |
#endif
|
510 |
|
511 |
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n) |
512 |
{ |
513 |
if (n < 8) { |
514 |
/* g0..g7 */
|
515 |
GET_REGA(env->gregs[n]); |
516 |
} |
517 |
if (n < 32) { |
518 |
/* register window */
|
519 |
GET_REGA(env->regwptr[n - 8]);
|
520 |
} |
521 |
#if defined(TARGET_ABI32) || !defined(TARGET_SPARC64)
|
522 |
if (n < 64) { |
523 |
/* fprs */
|
524 |
GET_REG32(*((uint32_t *)&env->fpr[n - 32]));
|
525 |
} |
526 |
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
|
527 |
switch (n) {
|
528 |
case 64: GET_REGA(env->y); |
529 |
case 65: GET_REGA(GET_PSR(env)); |
530 |
case 66: GET_REGA(env->wim); |
531 |
case 67: GET_REGA(env->tbr); |
532 |
case 68: GET_REGA(env->pc); |
533 |
case 69: GET_REGA(env->npc); |
534 |
case 70: GET_REGA(env->fsr); |
535 |
case 71: GET_REGA(0); /* csr */ |
536 |
case 72: GET_REGA(0); |
537 |
} |
538 |
#else
|
539 |
if (n < 64) { |
540 |
/* f0-f31 */
|
541 |
GET_REG32(*((uint32_t *)&env->fpr[n - 32]));
|
542 |
} |
543 |
if (n < 80) { |
544 |
/* f32-f62 (double width, even numbers only) */
|
545 |
uint64_t val; |
546 |
|
547 |
val = (uint64_t)*((uint32_t *)&env->fpr[(n - 64) * 2 + 32]) << 32; |
548 |
val |= *((uint32_t *)&env->fpr[(n - 64) * 2 + 33]); |
549 |
GET_REG64(val); |
550 |
} |
551 |
switch (n) {
|
552 |
case 80: GET_REGL(env->pc); |
553 |
case 81: GET_REGL(env->npc); |
554 |
case 82: GET_REGL(((uint64_t)GET_CCR(env) << 32) | |
555 |
((env->asi & 0xff) << 24) | |
556 |
((env->pstate & 0xfff) << 8) | |
557 |
GET_CWP64(env)); |
558 |
case 83: GET_REGL(env->fsr); |
559 |
case 84: GET_REGL(env->fprs); |
560 |
case 85: GET_REGL(env->y); |
561 |
} |
562 |
#endif
|
563 |
return 0; |
564 |
} |
565 |
|
566 |
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n) |
567 |
{ |
568 |
#if defined(TARGET_ABI32)
|
569 |
abi_ulong tmp; |
570 |
|
571 |
tmp = ldl_p(mem_buf); |
572 |
#else
|
573 |
target_ulong tmp; |
574 |
|
575 |
tmp = ldtul_p(mem_buf); |
576 |
#endif
|
577 |
|
578 |
if (n < 8) { |
579 |
/* g0..g7 */
|
580 |
env->gregs[n] = tmp; |
581 |
} else if (n < 32) { |
582 |
/* register window */
|
583 |
env->regwptr[n - 8] = tmp;
|
584 |
} |
585 |
#if defined(TARGET_ABI32) || !defined(TARGET_SPARC64)
|
586 |
else if (n < 64) { |
587 |
/* fprs */
|
588 |
*((uint32_t *)&env->fpr[n - 32]) = tmp;
|
589 |
} else {
|
590 |
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
|
591 |
switch (n) {
|
592 |
case 64: env->y = tmp; break; |
593 |
case 65: PUT_PSR(env, tmp); break; |
594 |
case 66: env->wim = tmp; break; |
595 |
case 67: env->tbr = tmp; break; |
596 |
case 68: env->pc = tmp; break; |
597 |
case 69: env->npc = tmp; break; |
598 |
case 70: env->fsr = tmp; break; |
599 |
default: return 0; |
600 |
} |
601 |
} |
602 |
return 4; |
603 |
#else
|
604 |
else if (n < 64) { |
605 |
/* f0-f31 */
|
606 |
env->fpr[n] = ldfl_p(mem_buf); |
607 |
return 4; |
608 |
} else if (n < 80) { |
609 |
/* f32-f62 (double width, even numbers only) */
|
610 |
*((uint32_t *)&env->fpr[(n - 64) * 2 + 32]) = tmp >> 32; |
611 |
*((uint32_t *)&env->fpr[(n - 64) * 2 + 33]) = tmp; |
612 |
} else {
|
613 |
switch (n) {
|
614 |
case 80: env->pc = tmp; break; |
615 |
case 81: env->npc = tmp; break; |
616 |
case 82: |
617 |
PUT_CCR(env, tmp >> 32);
|
618 |
env->asi = (tmp >> 24) & 0xff; |
619 |
env->pstate = (tmp >> 8) & 0xfff; |
620 |
PUT_CWP64(env, tmp & 0xff);
|
621 |
break;
|
622 |
case 83: env->fsr = tmp; break; |
623 |
case 84: env->fprs = tmp; break; |
624 |
case 85: env->y = tmp; break; |
625 |
default: return 0; |
626 |
} |
627 |
} |
628 |
return 8; |
629 |
#endif
|
630 |
} |
631 |
#elif defined (TARGET_ARM)
|
632 |
|
633 |
/* Old gdb always expect FPA registers. Newer (xml-aware) gdb only expect
|
634 |
whatever the target description contains. Due to a historical mishap
|
635 |
the FPA registers appear in between core integer regs and the CPSR.
|
636 |
We hack round this by giving the FPA regs zero size when talking to a
|
637 |
newer gdb. */
|
638 |
#define NUM_CORE_REGS 26 |
639 |
#define GDB_CORE_XML "arm-core.xml" |
640 |
|
641 |
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n) |
642 |
{ |
643 |
if (n < 16) { |
644 |
/* Core integer register. */
|
645 |
GET_REG32(env->regs[n]); |
646 |
} |
647 |
if (n < 24) { |
648 |
/* FPA registers. */
|
649 |
if (gdb_has_xml)
|
650 |
return 0; |
651 |
memset(mem_buf, 0, 12); |
652 |
return 12; |
653 |
} |
654 |
switch (n) {
|
655 |
case 24: |
656 |
/* FPA status register. */
|
657 |
if (gdb_has_xml)
|
658 |
return 0; |
659 |
GET_REG32(0);
|
660 |
case 25: |
661 |
/* CPSR */
|
662 |
GET_REG32(cpsr_read(env)); |
663 |
} |
664 |
/* Unknown register. */
|
665 |
return 0; |
666 |
} |
667 |
|
668 |
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n) |
669 |
{ |
670 |
uint32_t tmp; |
671 |
|
672 |
tmp = ldl_p(mem_buf); |
673 |
|
674 |
/* Mask out low bit of PC to workaround gdb bugs. This will probably
|
675 |
cause problems if we ever implement the Jazelle DBX extensions. */
|
676 |
if (n == 15) |
677 |
tmp &= ~1;
|
678 |
|
679 |
if (n < 16) { |
680 |
/* Core integer register. */
|
681 |
env->regs[n] = tmp; |
682 |
return 4; |
683 |
} |
684 |
if (n < 24) { /* 16-23 */ |
685 |
/* FPA registers (ignored). */
|
686 |
if (gdb_has_xml)
|
687 |
return 0; |
688 |
return 12; |
689 |
} |
690 |
switch (n) {
|
691 |
case 24: |
692 |
/* FPA status register (ignored). */
|
693 |
if (gdb_has_xml)
|
694 |
return 0; |
695 |
return 4; |
696 |
case 25: |
697 |
/* CPSR */
|
698 |
cpsr_write (env, tmp, 0xffffffff);
|
699 |
return 4; |
700 |
} |
701 |
/* Unknown register. */
|
702 |
return 0; |
703 |
} |
704 |
|
705 |
#elif defined (TARGET_M68K)
|
706 |
|
707 |
#define NUM_CORE_REGS 18 |
708 |
|
709 |
#define GDB_CORE_XML "cf-core.xml" |
710 |
|
711 |
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n) |
712 |
{ |
713 |
if (n < 8) { |
714 |
/* D0-D7 */
|
715 |
GET_REG32(env->dregs[n]); |
716 |
} else if (n < 16) { |
717 |
/* A0-A7 */
|
718 |
GET_REG32(env->aregs[n - 8]);
|
719 |
} else {
|
720 |
switch (n) {
|
721 |
case 16: GET_REG32(env->sr); |
722 |
case 17: GET_REG32(env->pc); |
723 |
} |
724 |
} |
725 |
/* FP registers not included here because they vary between
|
726 |
ColdFire and m68k. Use XML bits for these. */
|
727 |
return 0; |
728 |
} |
729 |
|
730 |
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n) |
731 |
{ |
732 |
uint32_t tmp; |
733 |
|
734 |
tmp = ldl_p(mem_buf); |
735 |
|
736 |
if (n < 8) { |
737 |
/* D0-D7 */
|
738 |
env->dregs[n] = tmp; |
739 |
} else if (n < 8) { |
740 |
/* A0-A7 */
|
741 |
env->aregs[n - 8] = tmp;
|
742 |
} else {
|
743 |
switch (n) {
|
744 |
case 16: env->sr = tmp; break; |
745 |
case 17: env->pc = tmp; break; |
746 |
default: return 0; |
747 |
} |
748 |
} |
749 |
return 4; |
750 |
} |
751 |
#elif defined (TARGET_MIPS)
|
752 |
|
753 |
#define NUM_CORE_REGS 73 |
754 |
|
755 |
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n) |
756 |
{ |
757 |
if (n < 32) { |
758 |
GET_REGL(env->active_tc.gpr[n]); |
759 |
} |
760 |
if (env->CP0_Config1 & (1 << CP0C1_FP)) { |
761 |
if (n >= 38 && n < 70) { |
762 |
if (env->CP0_Status & (1 << CP0St_FR)) |
763 |
GET_REGL(env->active_fpu.fpr[n - 38].d);
|
764 |
else
|
765 |
GET_REGL(env->active_fpu.fpr[n - 38].w[FP_ENDIAN_IDX]);
|
766 |
} |
767 |
switch (n) {
|
768 |
case 70: GET_REGL((int32_t)env->active_fpu.fcr31); |
769 |
case 71: GET_REGL((int32_t)env->active_fpu.fcr0); |
770 |
} |
771 |
} |
772 |
switch (n) {
|
773 |
case 32: GET_REGL((int32_t)env->CP0_Status); |
774 |
case 33: GET_REGL(env->active_tc.LO[0]); |
775 |
case 34: GET_REGL(env->active_tc.HI[0]); |
776 |
case 35: GET_REGL(env->CP0_BadVAddr); |
777 |
case 36: GET_REGL((int32_t)env->CP0_Cause); |
778 |
case 37: GET_REGL(env->active_tc.PC); |
779 |
case 72: GET_REGL(0); /* fp */ |
780 |
case 89: GET_REGL((int32_t)env->CP0_PRid); |
781 |
} |
782 |
if (n >= 73 && n <= 88) { |
783 |
/* 16 embedded regs. */
|
784 |
GET_REGL(0);
|
785 |
} |
786 |
|
787 |
return 0; |
788 |
} |
789 |
|
790 |
/* convert MIPS rounding mode in FCR31 to IEEE library */
|
791 |
static unsigned int ieee_rm[] = |
792 |
{ |
793 |
float_round_nearest_even, |
794 |
float_round_to_zero, |
795 |
float_round_up, |
796 |
float_round_down |
797 |
}; |
798 |
#define RESTORE_ROUNDING_MODE \
|
799 |
set_float_rounding_mode(ieee_rm[env->active_fpu.fcr31 & 3], &env->active_fpu.fp_status)
|
800 |
|
801 |
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n) |
802 |
{ |
803 |
target_ulong tmp; |
804 |
|
805 |
tmp = ldtul_p(mem_buf); |
806 |
|
807 |
if (n < 32) { |
808 |
env->active_tc.gpr[n] = tmp; |
809 |
return sizeof(target_ulong); |
810 |
} |
811 |
if (env->CP0_Config1 & (1 << CP0C1_FP) |
812 |
&& n >= 38 && n < 73) { |
813 |
if (n < 70) { |
814 |
if (env->CP0_Status & (1 << CP0St_FR)) |
815 |
env->active_fpu.fpr[n - 38].d = tmp;
|
816 |
else
|
817 |
env->active_fpu.fpr[n - 38].w[FP_ENDIAN_IDX] = tmp;
|
818 |
} |
819 |
switch (n) {
|
820 |
case 70: |
821 |
env->active_fpu.fcr31 = tmp & 0xFF83FFFF;
|
822 |
/* set rounding mode */
|
823 |
RESTORE_ROUNDING_MODE; |
824 |
#ifndef CONFIG_SOFTFLOAT
|
825 |
/* no floating point exception for native float */
|
826 |
SET_FP_ENABLE(env->active_fpu.fcr31, 0);
|
827 |
#endif
|
828 |
break;
|
829 |
case 71: env->active_fpu.fcr0 = tmp; break; |
830 |
} |
831 |
return sizeof(target_ulong); |
832 |
} |
833 |
switch (n) {
|
834 |
case 32: env->CP0_Status = tmp; break; |
835 |
case 33: env->active_tc.LO[0] = tmp; break; |
836 |
case 34: env->active_tc.HI[0] = tmp; break; |
837 |
case 35: env->CP0_BadVAddr = tmp; break; |
838 |
case 36: env->CP0_Cause = tmp; break; |
839 |
case 37: env->active_tc.PC = tmp; break; |
840 |
case 72: /* fp, ignored */ break; |
841 |
default:
|
842 |
if (n > 89) |
843 |
return 0; |
844 |
/* Other registers are readonly. Ignore writes. */
|
845 |
break;
|
846 |
} |
847 |
|
848 |
return sizeof(target_ulong); |
849 |
} |
850 |
#elif defined (TARGET_SH4)
|
851 |
|
852 |
/* Hint: Use "set architecture sh4" in GDB to see fpu registers */
|
853 |
/* FIXME: We should use XML for this. */
|
854 |
|
855 |
#define NUM_CORE_REGS 59 |
856 |
|
857 |
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n) |
858 |
{ |
859 |
if (n < 8) { |
860 |
if ((env->sr & (SR_MD | SR_RB)) == (SR_MD | SR_RB)) {
|
861 |
GET_REGL(env->gregs[n + 16]);
|
862 |
} else {
|
863 |
GET_REGL(env->gregs[n]); |
864 |
} |
865 |
} else if (n < 16) { |
866 |
GET_REGL(env->gregs[n - 8]);
|
867 |
} else if (n >= 25 && n < 41) { |
868 |
GET_REGL(env->fregs[(n - 25) + ((env->fpscr & FPSCR_FR) ? 16 : 0)]); |
869 |
} else if (n >= 43 && n < 51) { |
870 |
GET_REGL(env->gregs[n - 43]);
|
871 |
} else if (n >= 51 && n < 59) { |
872 |
GET_REGL(env->gregs[n - (51 - 16)]); |
873 |
} |
874 |
switch (n) {
|
875 |
case 16: GET_REGL(env->pc); |
876 |
case 17: GET_REGL(env->pr); |
877 |
case 18: GET_REGL(env->gbr); |
878 |
case 19: GET_REGL(env->vbr); |
879 |
case 20: GET_REGL(env->mach); |
880 |
case 21: GET_REGL(env->macl); |
881 |
case 22: GET_REGL(env->sr); |
882 |
case 23: GET_REGL(env->fpul); |
883 |
case 24: GET_REGL(env->fpscr); |
884 |
case 41: GET_REGL(env->ssr); |
885 |
case 42: GET_REGL(env->spc); |
886 |
} |
887 |
|
888 |
return 0; |
889 |
} |
890 |
|
891 |
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n) |
892 |
{ |
893 |
uint32_t tmp; |
894 |
|
895 |
tmp = ldl_p(mem_buf); |
896 |
|
897 |
if (n < 8) { |
898 |
if ((env->sr & (SR_MD | SR_RB)) == (SR_MD | SR_RB)) {
|
899 |
env->gregs[n + 16] = tmp;
|
900 |
} else {
|
901 |
env->gregs[n] = tmp; |
902 |
} |
903 |
return 4; |
904 |
} else if (n < 16) { |
905 |
env->gregs[n - 8] = tmp;
|
906 |
return 4; |
907 |
} else if (n >= 25 && n < 41) { |
908 |
env->fregs[(n - 25) + ((env->fpscr & FPSCR_FR) ? 16 : 0)] = tmp; |
909 |
} else if (n >= 43 && n < 51) { |
910 |
env->gregs[n - 43] = tmp;
|
911 |
return 4; |
912 |
} else if (n >= 51 && n < 59) { |
913 |
env->gregs[n - (51 - 16)] = tmp; |
914 |
return 4; |
915 |
} |
916 |
switch (n) {
|
917 |
case 16: env->pc = tmp; |
918 |
case 17: env->pr = tmp; |
919 |
case 18: env->gbr = tmp; |
920 |
case 19: env->vbr = tmp; |
921 |
case 20: env->mach = tmp; |
922 |
case 21: env->macl = tmp; |
923 |
case 22: env->sr = tmp; |
924 |
case 23: env->fpul = tmp; |
925 |
case 24: env->fpscr = tmp; |
926 |
case 41: env->ssr = tmp; |
927 |
case 42: env->spc = tmp; |
928 |
default: return 0; |
929 |
} |
930 |
|
931 |
return 4; |
932 |
} |
933 |
#elif defined (TARGET_CRIS)
|
934 |
|
935 |
#define NUM_CORE_REGS 49 |
936 |
|
937 |
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n) |
938 |
{ |
939 |
uint8_t srs; |
940 |
|
941 |
srs = env->pregs[PR_SRS]; |
942 |
if (n < 16) { |
943 |
GET_REG32(env->regs[n]); |
944 |
} |
945 |
|
946 |
if (n >= 21 && n < 32) { |
947 |
GET_REG32(env->pregs[n - 16]);
|
948 |
} |
949 |
if (n >= 33 && n < 49) { |
950 |
GET_REG32(env->sregs[srs][n - 33]);
|
951 |
} |
952 |
switch (n) {
|
953 |
case 16: GET_REG8(env->pregs[0]); |
954 |
case 17: GET_REG8(env->pregs[1]); |
955 |
case 18: GET_REG32(env->pregs[2]); |
956 |
case 19: GET_REG8(srs); |
957 |
case 20: GET_REG16(env->pregs[4]); |
958 |
case 32: GET_REG32(env->pc); |
959 |
} |
960 |
|
961 |
return 0; |
962 |
} |
963 |
|
964 |
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n) |
965 |
{ |
966 |
uint32_t tmp; |
967 |
|
968 |
if (n > 49) |
969 |
return 0; |
970 |
|
971 |
tmp = ldl_p(mem_buf); |
972 |
|
973 |
if (n < 16) { |
974 |
env->regs[n] = tmp; |
975 |
} |
976 |
|
977 |
if (n >= 21 && n < 32) { |
978 |
env->pregs[n - 16] = tmp;
|
979 |
} |
980 |
|
981 |
/* FIXME: Should support function regs be writable? */
|
982 |
switch (n) {
|
983 |
case 16: return 1; |
984 |
case 17: return 1; |
985 |
case 18: env->pregs[PR_PID] = tmp; break; |
986 |
case 19: return 1; |
987 |
case 20: return 2; |
988 |
case 32: env->pc = tmp; break; |
989 |
} |
990 |
|
991 |
return 4; |
992 |
} |
993 |
#else
|
994 |
|
995 |
#define NUM_CORE_REGS 0 |
996 |
|
997 |
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n) |
998 |
{ |
999 |
return 0; |
1000 |
} |
1001 |
|
1002 |
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n) |
1003 |
{ |
1004 |
return 0; |
1005 |
} |
1006 |
|
1007 |
#endif
|
1008 |
|
1009 |
static int num_g_regs = NUM_CORE_REGS; |
1010 |
|
1011 |
#ifdef GDB_CORE_XML
|
1012 |
/* Encode data using the encoding for 'x' packets. */
|
1013 |
static int memtox(char *buf, const char *mem, int len) |
1014 |
{ |
1015 |
char *p = buf;
|
1016 |
char c;
|
1017 |
|
1018 |
while (len--) {
|
1019 |
c = *(mem++); |
1020 |
switch (c) {
|
1021 |
case '#': case '$': case '*': case '}': |
1022 |
*(p++) = '}';
|
1023 |
*(p++) = c ^ 0x20;
|
1024 |
break;
|
1025 |
default:
|
1026 |
*(p++) = c; |
1027 |
break;
|
1028 |
} |
1029 |
} |
1030 |
return p - buf;
|
1031 |
} |
1032 |
|
1033 |
const char *get_feature_xml(const char *p, const char **newp) |
1034 |
{ |
1035 |
extern const char *const xml_builtin[][2]; |
1036 |
size_t len; |
1037 |
int i;
|
1038 |
const char *name; |
1039 |
static char target_xml[1024]; |
1040 |
|
1041 |
len = 0;
|
1042 |
while (p[len] && p[len] != ':') |
1043 |
len++; |
1044 |
*newp = p + len; |
1045 |
|
1046 |
name = NULL;
|
1047 |
if (strncmp(p, "target.xml", len) == 0) { |
1048 |
/* Generate the XML description for this CPU. */
|
1049 |
if (!target_xml[0]) { |
1050 |
GDBRegisterState *r; |
1051 |
|
1052 |
snprintf(target_xml, sizeof(target_xml),
|
1053 |
"<?xml version=\"1.0\"?>"
|
1054 |
"<!DOCTYPE target SYSTEM \"gdb-target.dtd\">"
|
1055 |
"<target>"
|
1056 |
"<xi:include href=\"%s\"/>",
|
1057 |
GDB_CORE_XML); |
1058 |
|
1059 |
for (r = first_cpu->gdb_regs; r; r = r->next) {
|
1060 |
strcat(target_xml, "<xi:include href=\"");
|
1061 |
strcat(target_xml, r->xml); |
1062 |
strcat(target_xml, "\"/>");
|
1063 |
} |
1064 |
strcat(target_xml, "</target>");
|
1065 |
} |
1066 |
return target_xml;
|
1067 |
} |
1068 |
for (i = 0; ; i++) { |
1069 |
name = xml_builtin[i][0];
|
1070 |
if (!name || (strncmp(name, p, len) == 0 && strlen(name) == len)) |
1071 |
break;
|
1072 |
} |
1073 |
return name ? xml_builtin[i][1] : NULL; |
1074 |
} |
1075 |
#endif
|
1076 |
|
1077 |
static int gdb_read_register(CPUState *env, uint8_t *mem_buf, int reg) |
1078 |
{ |
1079 |
GDBRegisterState *r; |
1080 |
|
1081 |
if (reg < NUM_CORE_REGS)
|
1082 |
return cpu_gdb_read_register(env, mem_buf, reg);
|
1083 |
|
1084 |
for (r = env->gdb_regs; r; r = r->next) {
|
1085 |
if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) {
|
1086 |
return r->get_reg(env, mem_buf, reg - r->base_reg);
|
1087 |
} |
1088 |
} |
1089 |
return 0; |
1090 |
} |
1091 |
|
1092 |
static int gdb_write_register(CPUState *env, uint8_t *mem_buf, int reg) |
1093 |
{ |
1094 |
GDBRegisterState *r; |
1095 |
|
1096 |
if (reg < NUM_CORE_REGS)
|
1097 |
return cpu_gdb_write_register(env, mem_buf, reg);
|
1098 |
|
1099 |
for (r = env->gdb_regs; r; r = r->next) {
|
1100 |
if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) {
|
1101 |
return r->set_reg(env, mem_buf, reg - r->base_reg);
|
1102 |
} |
1103 |
} |
1104 |
return 0; |
1105 |
} |
1106 |
|
1107 |
/* Register a supplemental set of CPU registers. If g_pos is nonzero it
|
1108 |
specifies the first register number and these registers are included in
|
1109 |
a standard "g" packet. Direction is relative to gdb, i.e. get_reg is
|
1110 |
gdb reading a CPU register, and set_reg is gdb modifying a CPU register.
|
1111 |
*/
|
1112 |
|
1113 |
void gdb_register_coprocessor(CPUState * env,
|
1114 |
gdb_reg_cb get_reg, gdb_reg_cb set_reg, |
1115 |
int num_regs, const char *xml, int g_pos) |
1116 |
{ |
1117 |
GDBRegisterState *s; |
1118 |
GDBRegisterState **p; |
1119 |
static int last_reg = NUM_CORE_REGS; |
1120 |
|
1121 |
s = (GDBRegisterState *)qemu_mallocz(sizeof(GDBRegisterState));
|
1122 |
s->base_reg = last_reg; |
1123 |
s->num_regs = num_regs; |
1124 |
s->get_reg = get_reg; |
1125 |
s->set_reg = set_reg; |
1126 |
s->xml = xml; |
1127 |
p = &env->gdb_regs; |
1128 |
while (*p) {
|
1129 |
/* Check for duplicates. */
|
1130 |
if (strcmp((*p)->xml, xml) == 0) |
1131 |
return;
|
1132 |
p = &(*p)->next; |
1133 |
} |
1134 |
/* Add to end of list. */
|
1135 |
last_reg += num_regs; |
1136 |
*p = s; |
1137 |
if (g_pos) {
|
1138 |
if (g_pos != s->base_reg) {
|
1139 |
fprintf(stderr, "Error: Bad gdb register numbering for '%s'\n"
|
1140 |
"Expected %d got %d\n", xml, g_pos, s->base_reg);
|
1141 |
} else {
|
1142 |
num_g_regs = last_reg; |
1143 |
} |
1144 |
} |
1145 |
} |
1146 |
|
1147 |
/* GDB breakpoint/watchpoint types */
|
1148 |
#define GDB_BREAKPOINT_SW 0 |
1149 |
#define GDB_BREAKPOINT_HW 1 |
1150 |
#define GDB_WATCHPOINT_WRITE 2 |
1151 |
#define GDB_WATCHPOINT_READ 3 |
1152 |
#define GDB_WATCHPOINT_ACCESS 4 |
1153 |
|
1154 |
#ifndef CONFIG_USER_ONLY
|
1155 |
static const int xlat_gdb_type[] = { |
1156 |
[GDB_WATCHPOINT_WRITE] = BP_GDB | BP_MEM_WRITE, |
1157 |
[GDB_WATCHPOINT_READ] = BP_GDB | BP_MEM_READ, |
1158 |
[GDB_WATCHPOINT_ACCESS] = BP_GDB | BP_MEM_ACCESS, |
1159 |
}; |
1160 |
#endif
|
1161 |
|
1162 |
static int gdb_breakpoint_insert(target_ulong addr, target_ulong len, int type) |
1163 |
{ |
1164 |
CPUState *env; |
1165 |
int err = 0; |
1166 |
|
1167 |
switch (type) {
|
1168 |
case GDB_BREAKPOINT_SW:
|
1169 |
case GDB_BREAKPOINT_HW:
|
1170 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1171 |
err = cpu_breakpoint_insert(env, addr, BP_GDB, NULL);
|
1172 |
if (err)
|
1173 |
break;
|
1174 |
} |
1175 |
return err;
|
1176 |
#ifndef CONFIG_USER_ONLY
|
1177 |
case GDB_WATCHPOINT_WRITE:
|
1178 |
case GDB_WATCHPOINT_READ:
|
1179 |
case GDB_WATCHPOINT_ACCESS:
|
1180 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1181 |
err = cpu_watchpoint_insert(env, addr, len, xlat_gdb_type[type], |
1182 |
NULL);
|
1183 |
if (err)
|
1184 |
break;
|
1185 |
} |
1186 |
return err;
|
1187 |
#endif
|
1188 |
default:
|
1189 |
return -ENOSYS;
|
1190 |
} |
1191 |
} |
1192 |
|
1193 |
static int gdb_breakpoint_remove(target_ulong addr, target_ulong len, int type) |
1194 |
{ |
1195 |
CPUState *env; |
1196 |
int err = 0; |
1197 |
|
1198 |
switch (type) {
|
1199 |
case GDB_BREAKPOINT_SW:
|
1200 |
case GDB_BREAKPOINT_HW:
|
1201 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1202 |
err = cpu_breakpoint_remove(env, addr, BP_GDB); |
1203 |
if (err)
|
1204 |
break;
|
1205 |
} |
1206 |
return err;
|
1207 |
#ifndef CONFIG_USER_ONLY
|
1208 |
case GDB_WATCHPOINT_WRITE:
|
1209 |
case GDB_WATCHPOINT_READ:
|
1210 |
case GDB_WATCHPOINT_ACCESS:
|
1211 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1212 |
err = cpu_watchpoint_remove(env, addr, len, xlat_gdb_type[type]); |
1213 |
if (err)
|
1214 |
break;
|
1215 |
} |
1216 |
return err;
|
1217 |
#endif
|
1218 |
default:
|
1219 |
return -ENOSYS;
|
1220 |
} |
1221 |
} |
1222 |
|
1223 |
static void gdb_breakpoint_remove_all(void) |
1224 |
{ |
1225 |
CPUState *env; |
1226 |
|
1227 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1228 |
cpu_breakpoint_remove_all(env, BP_GDB); |
1229 |
#ifndef CONFIG_USER_ONLY
|
1230 |
cpu_watchpoint_remove_all(env, BP_GDB); |
1231 |
#endif
|
1232 |
} |
1233 |
} |
1234 |
|
1235 |
static int gdb_handle_packet(GDBState *s, const char *line_buf) |
1236 |
{ |
1237 |
CPUState *env; |
1238 |
const char *p; |
1239 |
int ch, reg_size, type, res, thread;
|
1240 |
char buf[MAX_PACKET_LENGTH];
|
1241 |
uint8_t mem_buf[MAX_PACKET_LENGTH]; |
1242 |
uint8_t *registers; |
1243 |
target_ulong addr, len; |
1244 |
|
1245 |
#ifdef DEBUG_GDB
|
1246 |
printf("command='%s'\n", line_buf);
|
1247 |
#endif
|
1248 |
p = line_buf; |
1249 |
ch = *p++; |
1250 |
switch(ch) {
|
1251 |
case '?': |
1252 |
/* TODO: Make this return the correct value for user-mode. */
|
1253 |
snprintf(buf, sizeof(buf), "T%02xthread:%02x;", SIGTRAP, |
1254 |
s->c_cpu->cpu_index+1);
|
1255 |
put_packet(s, buf); |
1256 |
/* Remove all the breakpoints when this query is issued,
|
1257 |
* because gdb is doing and initial connect and the state
|
1258 |
* should be cleaned up.
|
1259 |
*/
|
1260 |
gdb_breakpoint_remove_all(); |
1261 |
break;
|
1262 |
case 'c': |
1263 |
if (*p != '\0') { |
1264 |
addr = strtoull(p, (char **)&p, 16); |
1265 |
#if defined(TARGET_I386)
|
1266 |
s->c_cpu->eip = addr; |
1267 |
#elif defined (TARGET_PPC)
|
1268 |
s->c_cpu->nip = addr; |
1269 |
#elif defined (TARGET_SPARC)
|
1270 |
s->c_cpu->pc = addr; |
1271 |
s->c_cpu->npc = addr + 4;
|
1272 |
#elif defined (TARGET_ARM)
|
1273 |
s->c_cpu->regs[15] = addr;
|
1274 |
#elif defined (TARGET_SH4)
|
1275 |
s->c_cpu->pc = addr; |
1276 |
#elif defined (TARGET_MIPS)
|
1277 |
s->c_cpu->active_tc.PC = addr; |
1278 |
#elif defined (TARGET_CRIS)
|
1279 |
s->c_cpu->pc = addr; |
1280 |
#endif
|
1281 |
} |
1282 |
gdb_continue(s); |
1283 |
return RS_IDLE;
|
1284 |
case 'C': |
1285 |
s->signal = strtoul(p, (char **)&p, 16); |
1286 |
gdb_continue(s); |
1287 |
return RS_IDLE;
|
1288 |
case 'k': |
1289 |
/* Kill the target */
|
1290 |
fprintf(stderr, "\nQEMU: Terminated via GDBstub\n");
|
1291 |
exit(0);
|
1292 |
case 'D': |
1293 |
/* Detach packet */
|
1294 |
gdb_breakpoint_remove_all(); |
1295 |
gdb_continue(s); |
1296 |
put_packet(s, "OK");
|
1297 |
break;
|
1298 |
case 's': |
1299 |
if (*p != '\0') { |
1300 |
addr = strtoull(p, (char **)&p, 16); |
1301 |
#if defined(TARGET_I386)
|
1302 |
s->c_cpu->eip = addr; |
1303 |
#elif defined (TARGET_PPC)
|
1304 |
s->c_cpu->nip = addr; |
1305 |
#elif defined (TARGET_SPARC)
|
1306 |
s->c_cpu->pc = addr; |
1307 |
s->c_cpu->npc = addr + 4;
|
1308 |
#elif defined (TARGET_ARM)
|
1309 |
s->c_cpu->regs[15] = addr;
|
1310 |
#elif defined (TARGET_SH4)
|
1311 |
s->c_cpu->pc = addr; |
1312 |
#elif defined (TARGET_MIPS)
|
1313 |
s->c_cpu->active_tc.PC = addr; |
1314 |
#elif defined (TARGET_CRIS)
|
1315 |
s->c_cpu->pc = addr; |
1316 |
#endif
|
1317 |
} |
1318 |
cpu_single_step(s->c_cpu, sstep_flags); |
1319 |
gdb_continue(s); |
1320 |
return RS_IDLE;
|
1321 |
case 'F': |
1322 |
{ |
1323 |
target_ulong ret; |
1324 |
target_ulong err; |
1325 |
|
1326 |
ret = strtoull(p, (char **)&p, 16); |
1327 |
if (*p == ',') { |
1328 |
p++; |
1329 |
err = strtoull(p, (char **)&p, 16); |
1330 |
} else {
|
1331 |
err = 0;
|
1332 |
} |
1333 |
if (*p == ',') |
1334 |
p++; |
1335 |
type = *p; |
1336 |
if (gdb_current_syscall_cb)
|
1337 |
gdb_current_syscall_cb(s->c_cpu, ret, err); |
1338 |
if (type == 'C') { |
1339 |
put_packet(s, "T02");
|
1340 |
} else {
|
1341 |
gdb_continue(s); |
1342 |
} |
1343 |
} |
1344 |
break;
|
1345 |
case 'g': |
1346 |
len = 0;
|
1347 |
for (addr = 0; addr < num_g_regs; addr++) { |
1348 |
reg_size = gdb_read_register(s->g_cpu, mem_buf + len, addr); |
1349 |
len += reg_size; |
1350 |
} |
1351 |
memtohex(buf, mem_buf, len); |
1352 |
put_packet(s, buf); |
1353 |
break;
|
1354 |
case 'G': |
1355 |
registers = mem_buf; |
1356 |
len = strlen(p) / 2;
|
1357 |
hextomem((uint8_t *)registers, p, len); |
1358 |
for (addr = 0; addr < num_g_regs && len > 0; addr++) { |
1359 |
reg_size = gdb_write_register(s->g_cpu, registers, addr); |
1360 |
len -= reg_size; |
1361 |
registers += reg_size; |
1362 |
} |
1363 |
put_packet(s, "OK");
|
1364 |
break;
|
1365 |
case 'm': |
1366 |
addr = strtoull(p, (char **)&p, 16); |
1367 |
if (*p == ',') |
1368 |
p++; |
1369 |
len = strtoull(p, NULL, 16); |
1370 |
if (cpu_memory_rw_debug(s->g_cpu, addr, mem_buf, len, 0) != 0) { |
1371 |
put_packet (s, "E14");
|
1372 |
} else {
|
1373 |
memtohex(buf, mem_buf, len); |
1374 |
put_packet(s, buf); |
1375 |
} |
1376 |
break;
|
1377 |
case 'M': |
1378 |
addr = strtoull(p, (char **)&p, 16); |
1379 |
if (*p == ',') |
1380 |
p++; |
1381 |
len = strtoull(p, (char **)&p, 16); |
1382 |
if (*p == ':') |
1383 |
p++; |
1384 |
hextomem(mem_buf, p, len); |
1385 |
if (cpu_memory_rw_debug(s->g_cpu, addr, mem_buf, len, 1) != 0) |
1386 |
put_packet(s, "E14");
|
1387 |
else
|
1388 |
put_packet(s, "OK");
|
1389 |
break;
|
1390 |
case 'p': |
1391 |
/* Older gdb are really dumb, and don't use 'g' if 'p' is avaialable.
|
1392 |
This works, but can be very slow. Anything new enough to
|
1393 |
understand XML also knows how to use this properly. */
|
1394 |
if (!gdb_has_xml)
|
1395 |
goto unknown_command;
|
1396 |
addr = strtoull(p, (char **)&p, 16); |
1397 |
reg_size = gdb_read_register(s->g_cpu, mem_buf, addr); |
1398 |
if (reg_size) {
|
1399 |
memtohex(buf, mem_buf, reg_size); |
1400 |
put_packet(s, buf); |
1401 |
} else {
|
1402 |
put_packet(s, "E14");
|
1403 |
} |
1404 |
break;
|
1405 |
case 'P': |
1406 |
if (!gdb_has_xml)
|
1407 |
goto unknown_command;
|
1408 |
addr = strtoull(p, (char **)&p, 16); |
1409 |
if (*p == '=') |
1410 |
p++; |
1411 |
reg_size = strlen(p) / 2;
|
1412 |
hextomem(mem_buf, p, reg_size); |
1413 |
gdb_write_register(s->g_cpu, mem_buf, addr); |
1414 |
put_packet(s, "OK");
|
1415 |
break;
|
1416 |
case 'Z': |
1417 |
case 'z': |
1418 |
type = strtoul(p, (char **)&p, 16); |
1419 |
if (*p == ',') |
1420 |
p++; |
1421 |
addr = strtoull(p, (char **)&p, 16); |
1422 |
if (*p == ',') |
1423 |
p++; |
1424 |
len = strtoull(p, (char **)&p, 16); |
1425 |
if (ch == 'Z') |
1426 |
res = gdb_breakpoint_insert(addr, len, type); |
1427 |
else
|
1428 |
res = gdb_breakpoint_remove(addr, len, type); |
1429 |
if (res >= 0) |
1430 |
put_packet(s, "OK");
|
1431 |
else if (res == -ENOSYS) |
1432 |
put_packet(s, "");
|
1433 |
else
|
1434 |
put_packet(s, "E22");
|
1435 |
break;
|
1436 |
case 'H': |
1437 |
type = *p++; |
1438 |
thread = strtoull(p, (char **)&p, 16); |
1439 |
if (thread == -1 || thread == 0) { |
1440 |
put_packet(s, "OK");
|
1441 |
break;
|
1442 |
} |
1443 |
for (env = first_cpu; env != NULL; env = env->next_cpu) |
1444 |
if (env->cpu_index + 1 == thread) |
1445 |
break;
|
1446 |
if (env == NULL) { |
1447 |
put_packet(s, "E22");
|
1448 |
break;
|
1449 |
} |
1450 |
switch (type) {
|
1451 |
case 'c': |
1452 |
s->c_cpu = env; |
1453 |
put_packet(s, "OK");
|
1454 |
break;
|
1455 |
case 'g': |
1456 |
s->g_cpu = env; |
1457 |
put_packet(s, "OK");
|
1458 |
break;
|
1459 |
default:
|
1460 |
put_packet(s, "E22");
|
1461 |
break;
|
1462 |
} |
1463 |
break;
|
1464 |
case 'T': |
1465 |
thread = strtoull(p, (char **)&p, 16); |
1466 |
#ifndef CONFIG_USER_ONLY
|
1467 |
if (thread > 0 && thread < smp_cpus + 1) |
1468 |
#else
|
1469 |
if (thread == 1) |
1470 |
#endif
|
1471 |
put_packet(s, "OK");
|
1472 |
else
|
1473 |
put_packet(s, "E22");
|
1474 |
break;
|
1475 |
case 'q': |
1476 |
case 'Q': |
1477 |
/* parse any 'q' packets here */
|
1478 |
if (!strcmp(p,"qemu.sstepbits")) { |
1479 |
/* Query Breakpoint bit definitions */
|
1480 |
snprintf(buf, sizeof(buf), "ENABLE=%x,NOIRQ=%x,NOTIMER=%x", |
1481 |
SSTEP_ENABLE, |
1482 |
SSTEP_NOIRQ, |
1483 |
SSTEP_NOTIMER); |
1484 |
put_packet(s, buf); |
1485 |
break;
|
1486 |
} else if (strncmp(p,"qemu.sstep",10) == 0) { |
1487 |
/* Display or change the sstep_flags */
|
1488 |
p += 10;
|
1489 |
if (*p != '=') { |
1490 |
/* Display current setting */
|
1491 |
snprintf(buf, sizeof(buf), "0x%x", sstep_flags); |
1492 |
put_packet(s, buf); |
1493 |
break;
|
1494 |
} |
1495 |
p++; |
1496 |
type = strtoul(p, (char **)&p, 16); |
1497 |
sstep_flags = type; |
1498 |
put_packet(s, "OK");
|
1499 |
break;
|
1500 |
} else if (strcmp(p,"C") == 0) { |
1501 |
/* "Current thread" remains vague in the spec, so always return
|
1502 |
* the first CPU (gdb returns the first thread). */
|
1503 |
put_packet(s, "QC1");
|
1504 |
break;
|
1505 |
} else if (strcmp(p,"fThreadInfo") == 0) { |
1506 |
s->query_cpu = first_cpu; |
1507 |
goto report_cpuinfo;
|
1508 |
} else if (strcmp(p,"sThreadInfo") == 0) { |
1509 |
report_cpuinfo:
|
1510 |
if (s->query_cpu) {
|
1511 |
snprintf(buf, sizeof(buf), "m%x", s->query_cpu->cpu_index+1); |
1512 |
put_packet(s, buf); |
1513 |
s->query_cpu = s->query_cpu->next_cpu; |
1514 |
} else
|
1515 |
put_packet(s, "l");
|
1516 |
break;
|
1517 |
} else if (strncmp(p,"ThreadExtraInfo,", 16) == 0) { |
1518 |
thread = strtoull(p+16, (char **)&p, 16); |
1519 |
for (env = first_cpu; env != NULL; env = env->next_cpu) |
1520 |
if (env->cpu_index + 1 == thread) { |
1521 |
len = snprintf((char *)mem_buf, sizeof(mem_buf), |
1522 |
"CPU#%d [%s]", env->cpu_index,
|
1523 |
env->halted ? "halted " : "running"); |
1524 |
memtohex(buf, mem_buf, len); |
1525 |
put_packet(s, buf); |
1526 |
break;
|
1527 |
} |
1528 |
break;
|
1529 |
} |
1530 |
#ifdef CONFIG_LINUX_USER
|
1531 |
else if (strncmp(p, "Offsets", 7) == 0) { |
1532 |
TaskState *ts = s->c_cpu->opaque; |
1533 |
|
1534 |
snprintf(buf, sizeof(buf),
|
1535 |
"Text=" TARGET_ABI_FMT_lx ";Data=" TARGET_ABI_FMT_lx |
1536 |
";Bss=" TARGET_ABI_FMT_lx,
|
1537 |
ts->info->code_offset, |
1538 |
ts->info->data_offset, |
1539 |
ts->info->data_offset); |
1540 |
put_packet(s, buf); |
1541 |
break;
|
1542 |
} |
1543 |
#endif
|
1544 |
if (strncmp(p, "Supported", 9) == 0) { |
1545 |
snprintf(buf, sizeof(buf), "PacketSize=%x", MAX_PACKET_LENGTH); |
1546 |
#ifdef GDB_CORE_XML
|
1547 |
strcat(buf, ";qXfer:features:read+");
|
1548 |
#endif
|
1549 |
put_packet(s, buf); |
1550 |
break;
|
1551 |
} |
1552 |
#ifdef GDB_CORE_XML
|
1553 |
if (strncmp(p, "Xfer:features:read:", 19) == 0) { |
1554 |
const char *xml; |
1555 |
target_ulong total_len; |
1556 |
|
1557 |
gdb_has_xml = 1;
|
1558 |
p += 19;
|
1559 |
xml = get_feature_xml(p, &p); |
1560 |
if (!xml) {
|
1561 |
snprintf(buf, sizeof(buf), "E00"); |
1562 |
put_packet(s, buf); |
1563 |
break;
|
1564 |
} |
1565 |
|
1566 |
if (*p == ':') |
1567 |
p++; |
1568 |
addr = strtoul(p, (char **)&p, 16); |
1569 |
if (*p == ',') |
1570 |
p++; |
1571 |
len = strtoul(p, (char **)&p, 16); |
1572 |
|
1573 |
total_len = strlen(xml); |
1574 |
if (addr > total_len) {
|
1575 |
snprintf(buf, sizeof(buf), "E00"); |
1576 |
put_packet(s, buf); |
1577 |
break;
|
1578 |
} |
1579 |
if (len > (MAX_PACKET_LENGTH - 5) / 2) |
1580 |
len = (MAX_PACKET_LENGTH - 5) / 2; |
1581 |
if (len < total_len - addr) {
|
1582 |
buf[0] = 'm'; |
1583 |
len = memtox(buf + 1, xml + addr, len);
|
1584 |
} else {
|
1585 |
buf[0] = 'l'; |
1586 |
len = memtox(buf + 1, xml + addr, total_len - addr);
|
1587 |
} |
1588 |
put_packet_binary(s, buf, len + 1);
|
1589 |
break;
|
1590 |
} |
1591 |
#endif
|
1592 |
/* Unrecognised 'q' command. */
|
1593 |
goto unknown_command;
|
1594 |
|
1595 |
default:
|
1596 |
unknown_command:
|
1597 |
/* put empty packet */
|
1598 |
buf[0] = '\0'; |
1599 |
put_packet(s, buf); |
1600 |
break;
|
1601 |
} |
1602 |
return RS_IDLE;
|
1603 |
} |
1604 |
|
1605 |
extern void tb_flush(CPUState *env); |
1606 |
|
1607 |
void gdb_set_stop_cpu(CPUState *env)
|
1608 |
{ |
1609 |
gdbserver_state->c_cpu = env; |
1610 |
gdbserver_state->g_cpu = env; |
1611 |
} |
1612 |
|
1613 |
#ifndef CONFIG_USER_ONLY
|
1614 |
static void gdb_vm_stopped(void *opaque, int reason) |
1615 |
{ |
1616 |
GDBState *s = gdbserver_state; |
1617 |
CPUState *env = s->c_cpu; |
1618 |
char buf[256]; |
1619 |
const char *type; |
1620 |
int ret;
|
1621 |
|
1622 |
if (s->state == RS_SYSCALL)
|
1623 |
return;
|
1624 |
|
1625 |
/* disable single step if it was enable */
|
1626 |
cpu_single_step(env, 0);
|
1627 |
|
1628 |
if (reason == EXCP_DEBUG) {
|
1629 |
if (env->watchpoint_hit) {
|
1630 |
switch (env->watchpoint_hit->flags & BP_MEM_ACCESS) {
|
1631 |
case BP_MEM_READ:
|
1632 |
type = "r";
|
1633 |
break;
|
1634 |
case BP_MEM_ACCESS:
|
1635 |
type = "a";
|
1636 |
break;
|
1637 |
default:
|
1638 |
type = "";
|
1639 |
break;
|
1640 |
} |
1641 |
snprintf(buf, sizeof(buf),
|
1642 |
"T%02xthread:%02x;%swatch:" TARGET_FMT_lx ";", |
1643 |
SIGTRAP, env->cpu_index+1, type,
|
1644 |
env->watchpoint_hit->vaddr); |
1645 |
put_packet(s, buf); |
1646 |
env->watchpoint_hit = NULL;
|
1647 |
return;
|
1648 |
} |
1649 |
tb_flush(env); |
1650 |
ret = SIGTRAP; |
1651 |
} else if (reason == EXCP_INTERRUPT) { |
1652 |
ret = SIGINT; |
1653 |
} else {
|
1654 |
ret = 0;
|
1655 |
} |
1656 |
snprintf(buf, sizeof(buf), "T%02xthread:%02x;", ret, env->cpu_index+1); |
1657 |
put_packet(s, buf); |
1658 |
} |
1659 |
#endif
|
1660 |
|
1661 |
/* Send a gdb syscall request.
|
1662 |
This accepts limited printf-style format specifiers, specifically:
|
1663 |
%x - target_ulong argument printed in hex.
|
1664 |
%lx - 64-bit argument printed in hex.
|
1665 |
%s - string pointer (target_ulong) and length (int) pair. */
|
1666 |
void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...) |
1667 |
{ |
1668 |
va_list va; |
1669 |
char buf[256]; |
1670 |
char *p;
|
1671 |
target_ulong addr; |
1672 |
uint64_t i64; |
1673 |
GDBState *s; |
1674 |
|
1675 |
s = gdbserver_state; |
1676 |
if (!s)
|
1677 |
return;
|
1678 |
gdb_current_syscall_cb = cb; |
1679 |
s->state = RS_SYSCALL; |
1680 |
#ifndef CONFIG_USER_ONLY
|
1681 |
vm_stop(EXCP_DEBUG); |
1682 |
#endif
|
1683 |
s->state = RS_IDLE; |
1684 |
va_start(va, fmt); |
1685 |
p = buf; |
1686 |
*(p++) = 'F';
|
1687 |
while (*fmt) {
|
1688 |
if (*fmt == '%') { |
1689 |
fmt++; |
1690 |
switch (*fmt++) {
|
1691 |
case 'x': |
1692 |
addr = va_arg(va, target_ulong); |
1693 |
p += snprintf(p, &buf[sizeof(buf)] - p, TARGET_FMT_lx, addr);
|
1694 |
break;
|
1695 |
case 'l': |
1696 |
if (*(fmt++) != 'x') |
1697 |
goto bad_format;
|
1698 |
i64 = va_arg(va, uint64_t); |
1699 |
p += snprintf(p, &buf[sizeof(buf)] - p, "%" PRIx64, i64); |
1700 |
break;
|
1701 |
case 's': |
1702 |
addr = va_arg(va, target_ulong); |
1703 |
p += snprintf(p, &buf[sizeof(buf)] - p, TARGET_FMT_lx "/%x", |
1704 |
addr, va_arg(va, int));
|
1705 |
break;
|
1706 |
default:
|
1707 |
bad_format:
|
1708 |
fprintf(stderr, "gdbstub: Bad syscall format string '%s'\n",
|
1709 |
fmt - 1);
|
1710 |
break;
|
1711 |
} |
1712 |
} else {
|
1713 |
*(p++) = *(fmt++); |
1714 |
} |
1715 |
} |
1716 |
*p = 0;
|
1717 |
va_end(va); |
1718 |
put_packet(s, buf); |
1719 |
#ifdef CONFIG_USER_ONLY
|
1720 |
gdb_handlesig(s->c_cpu, 0);
|
1721 |
#else
|
1722 |
cpu_interrupt(s->c_cpu, CPU_INTERRUPT_EXIT); |
1723 |
#endif
|
1724 |
} |
1725 |
|
1726 |
static void gdb_read_byte(GDBState *s, int ch) |
1727 |
{ |
1728 |
int i, csum;
|
1729 |
uint8_t reply; |
1730 |
|
1731 |
#ifndef CONFIG_USER_ONLY
|
1732 |
if (s->last_packet_len) {
|
1733 |
/* Waiting for a response to the last packet. If we see the start
|
1734 |
of a new command then abandon the previous response. */
|
1735 |
if (ch == '-') { |
1736 |
#ifdef DEBUG_GDB
|
1737 |
printf("Got NACK, retransmitting\n");
|
1738 |
#endif
|
1739 |
put_buffer(s, (uint8_t *)s->last_packet, s->last_packet_len); |
1740 |
} |
1741 |
#ifdef DEBUG_GDB
|
1742 |
else if (ch == '+') |
1743 |
printf("Got ACK\n");
|
1744 |
else
|
1745 |
printf("Got '%c' when expecting ACK/NACK\n", ch);
|
1746 |
#endif
|
1747 |
if (ch == '+' || ch == '$') |
1748 |
s->last_packet_len = 0;
|
1749 |
if (ch != '$') |
1750 |
return;
|
1751 |
} |
1752 |
if (vm_running) {
|
1753 |
/* when the CPU is running, we cannot do anything except stop
|
1754 |
it when receiving a char */
|
1755 |
vm_stop(EXCP_INTERRUPT); |
1756 |
} else
|
1757 |
#endif
|
1758 |
{ |
1759 |
switch(s->state) {
|
1760 |
case RS_IDLE:
|
1761 |
if (ch == '$') { |
1762 |
s->line_buf_index = 0;
|
1763 |
s->state = RS_GETLINE; |
1764 |
} |
1765 |
break;
|
1766 |
case RS_GETLINE:
|
1767 |
if (ch == '#') { |
1768 |
s->state = RS_CHKSUM1; |
1769 |
} else if (s->line_buf_index >= sizeof(s->line_buf) - 1) { |
1770 |
s->state = RS_IDLE; |
1771 |
} else {
|
1772 |
s->line_buf[s->line_buf_index++] = ch; |
1773 |
} |
1774 |
break;
|
1775 |
case RS_CHKSUM1:
|
1776 |
s->line_buf[s->line_buf_index] = '\0';
|
1777 |
s->line_csum = fromhex(ch) << 4;
|
1778 |
s->state = RS_CHKSUM2; |
1779 |
break;
|
1780 |
case RS_CHKSUM2:
|
1781 |
s->line_csum |= fromhex(ch); |
1782 |
csum = 0;
|
1783 |
for(i = 0; i < s->line_buf_index; i++) { |
1784 |
csum += s->line_buf[i]; |
1785 |
} |
1786 |
if (s->line_csum != (csum & 0xff)) { |
1787 |
reply = '-';
|
1788 |
put_buffer(s, &reply, 1);
|
1789 |
s->state = RS_IDLE; |
1790 |
} else {
|
1791 |
reply = '+';
|
1792 |
put_buffer(s, &reply, 1);
|
1793 |
s->state = gdb_handle_packet(s, s->line_buf); |
1794 |
} |
1795 |
break;
|
1796 |
default:
|
1797 |
abort(); |
1798 |
} |
1799 |
} |
1800 |
} |
1801 |
|
1802 |
#ifdef CONFIG_USER_ONLY
|
1803 |
int
|
1804 |
gdb_handlesig (CPUState *env, int sig)
|
1805 |
{ |
1806 |
GDBState *s; |
1807 |
char buf[256]; |
1808 |
int n;
|
1809 |
|
1810 |
s = gdbserver_state; |
1811 |
if (gdbserver_fd < 0 || s->fd < 0) |
1812 |
return sig;
|
1813 |
|
1814 |
/* disable single step if it was enabled */
|
1815 |
cpu_single_step(env, 0);
|
1816 |
tb_flush(env); |
1817 |
|
1818 |
if (sig != 0) |
1819 |
{ |
1820 |
snprintf(buf, sizeof(buf), "S%02x", sig); |
1821 |
put_packet(s, buf); |
1822 |
} |
1823 |
/* put_packet() might have detected that the peer terminated the
|
1824 |
connection. */
|
1825 |
if (s->fd < 0) |
1826 |
return sig;
|
1827 |
|
1828 |
sig = 0;
|
1829 |
s->state = RS_IDLE; |
1830 |
s->running_state = 0;
|
1831 |
while (s->running_state == 0) { |
1832 |
n = read (s->fd, buf, 256);
|
1833 |
if (n > 0) |
1834 |
{ |
1835 |
int i;
|
1836 |
|
1837 |
for (i = 0; i < n; i++) |
1838 |
gdb_read_byte (s, buf[i]); |
1839 |
} |
1840 |
else if (n == 0 || errno != EAGAIN) |
1841 |
{ |
1842 |
/* XXX: Connection closed. Should probably wait for annother
|
1843 |
connection before continuing. */
|
1844 |
return sig;
|
1845 |
} |
1846 |
} |
1847 |
sig = s->signal; |
1848 |
s->signal = 0;
|
1849 |
return sig;
|
1850 |
} |
1851 |
|
1852 |
/* Tell the remote gdb that the process has exited. */
|
1853 |
void gdb_exit(CPUState *env, int code) |
1854 |
{ |
1855 |
GDBState *s; |
1856 |
char buf[4]; |
1857 |
|
1858 |
s = gdbserver_state; |
1859 |
if (gdbserver_fd < 0 || s->fd < 0) |
1860 |
return;
|
1861 |
|
1862 |
snprintf(buf, sizeof(buf), "W%02x", code); |
1863 |
put_packet(s, buf); |
1864 |
} |
1865 |
|
1866 |
|
1867 |
static void gdb_accept(void) |
1868 |
{ |
1869 |
GDBState *s; |
1870 |
struct sockaddr_in sockaddr;
|
1871 |
socklen_t len; |
1872 |
int val, fd;
|
1873 |
|
1874 |
for(;;) {
|
1875 |
len = sizeof(sockaddr);
|
1876 |
fd = accept(gdbserver_fd, (struct sockaddr *)&sockaddr, &len);
|
1877 |
if (fd < 0 && errno != EINTR) { |
1878 |
perror("accept");
|
1879 |
return;
|
1880 |
} else if (fd >= 0) { |
1881 |
break;
|
1882 |
} |
1883 |
} |
1884 |
|
1885 |
/* set short latency */
|
1886 |
val = 1;
|
1887 |
setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val)); |
1888 |
|
1889 |
s = qemu_mallocz(sizeof(GDBState));
|
1890 |
if (!s) {
|
1891 |
errno = ENOMEM; |
1892 |
perror("accept");
|
1893 |
return;
|
1894 |
} |
1895 |
|
1896 |
memset (s, 0, sizeof (GDBState)); |
1897 |
s->c_cpu = first_cpu; |
1898 |
s->g_cpu = first_cpu; |
1899 |
s->fd = fd; |
1900 |
gdb_has_xml = 0;
|
1901 |
|
1902 |
gdbserver_state = s; |
1903 |
|
1904 |
fcntl(fd, F_SETFL, O_NONBLOCK); |
1905 |
} |
1906 |
|
1907 |
static int gdbserver_open(int port) |
1908 |
{ |
1909 |
struct sockaddr_in sockaddr;
|
1910 |
int fd, val, ret;
|
1911 |
|
1912 |
fd = socket(PF_INET, SOCK_STREAM, 0);
|
1913 |
if (fd < 0) { |
1914 |
perror("socket");
|
1915 |
return -1; |
1916 |
} |
1917 |
|
1918 |
/* allow fast reuse */
|
1919 |
val = 1;
|
1920 |
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&val, sizeof(val)); |
1921 |
|
1922 |
sockaddr.sin_family = AF_INET; |
1923 |
sockaddr.sin_port = htons(port); |
1924 |
sockaddr.sin_addr.s_addr = 0;
|
1925 |
ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)); |
1926 |
if (ret < 0) { |
1927 |
perror("bind");
|
1928 |
return -1; |
1929 |
} |
1930 |
ret = listen(fd, 0);
|
1931 |
if (ret < 0) { |
1932 |
perror("listen");
|
1933 |
return -1; |
1934 |
} |
1935 |
return fd;
|
1936 |
} |
1937 |
|
1938 |
int gdbserver_start(int port) |
1939 |
{ |
1940 |
gdbserver_fd = gdbserver_open(port); |
1941 |
if (gdbserver_fd < 0) |
1942 |
return -1; |
1943 |
/* accept connections */
|
1944 |
gdb_accept(); |
1945 |
return 0; |
1946 |
} |
1947 |
#else
|
1948 |
static int gdb_chr_can_receive(void *opaque) |
1949 |
{ |
1950 |
/* We can handle an arbitrarily large amount of data.
|
1951 |
Pick the maximum packet size, which is as good as anything. */
|
1952 |
return MAX_PACKET_LENGTH;
|
1953 |
} |
1954 |
|
1955 |
static void gdb_chr_receive(void *opaque, const uint8_t *buf, int size) |
1956 |
{ |
1957 |
int i;
|
1958 |
|
1959 |
for (i = 0; i < size; i++) { |
1960 |
gdb_read_byte(gdbserver_state, buf[i]); |
1961 |
} |
1962 |
} |
1963 |
|
1964 |
static void gdb_chr_event(void *opaque, int event) |
1965 |
{ |
1966 |
switch (event) {
|
1967 |
case CHR_EVENT_RESET:
|
1968 |
vm_stop(EXCP_INTERRUPT); |
1969 |
gdb_has_xml = 0;
|
1970 |
break;
|
1971 |
default:
|
1972 |
break;
|
1973 |
} |
1974 |
} |
1975 |
|
1976 |
int gdbserver_start(const char *port) |
1977 |
{ |
1978 |
GDBState *s; |
1979 |
char gdbstub_port_name[128]; |
1980 |
int port_num;
|
1981 |
char *p;
|
1982 |
CharDriverState *chr; |
1983 |
|
1984 |
if (!port || !*port)
|
1985 |
return -1; |
1986 |
|
1987 |
port_num = strtol(port, &p, 10);
|
1988 |
if (*p == 0) { |
1989 |
/* A numeric value is interpreted as a port number. */
|
1990 |
snprintf(gdbstub_port_name, sizeof(gdbstub_port_name),
|
1991 |
"tcp::%d,nowait,nodelay,server", port_num);
|
1992 |
port = gdbstub_port_name; |
1993 |
} |
1994 |
|
1995 |
chr = qemu_chr_open("gdb", port);
|
1996 |
if (!chr)
|
1997 |
return -1; |
1998 |
|
1999 |
s = qemu_mallocz(sizeof(GDBState));
|
2000 |
if (!s) {
|
2001 |
return -1; |
2002 |
} |
2003 |
s->c_cpu = first_cpu; |
2004 |
s->g_cpu = first_cpu; |
2005 |
s->chr = chr; |
2006 |
gdbserver_state = s; |
2007 |
qemu_chr_add_handlers(chr, gdb_chr_can_receive, gdb_chr_receive, |
2008 |
gdb_chr_event, NULL);
|
2009 |
qemu_add_vm_stop_handler(gdb_vm_stopped, NULL);
|
2010 |
return 0; |
2011 |
} |
2012 |
#endif
|