[thirdparty/qemu.git] / gdbstub.c

/*
 * gdb server stub
 * 
 * Copyright (c) 2003 Fabrice Bellard
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <signal.h>

#include "cpu.h"
#include "exec-all.h"

//#define DEBUG_GDB

int gdbstub_fd = -1;

/* return 0 if OK */
static int gdbstub_open(int port)
{
    struct sockaddr_in sockaddr;
    socklen_t len;
    int fd, val, ret;

    fd = socket(PF_INET, SOCK_STREAM, 0);
    if (fd < 0) {
        perror("socket");
        return -1;
    }

    /* allow fast reuse */
    val = 1;
    setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));

    sockaddr.sin_family = AF_INET;
    sockaddr.sin_port = htons(port);
    sockaddr.sin_addr.s_addr = 0;
    ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr));
    if (ret < 0) {
        perror("bind");
        return -1;
    }
    ret = listen(fd, 0);
    if (ret < 0) {
        perror("listen");
        return -1;
    }
    
    /* now wait for one connection */
    for(;;) {
        len = sizeof(sockaddr);
        gdbstub_fd = accept(fd, (struct sockaddr *)&sockaddr, &len);
        if (gdbstub_fd < 0 && errno != EINTR) {
            perror("accept");
            return -1;
        } else if (gdbstub_fd >= 0) {
            break;
        }
    }
    
    /* set short latency */
    val = 1;
    setsockopt(gdbstub_fd, SOL_TCP, TCP_NODELAY, &val, sizeof(val));
    return 0;
}

static int get_char(void)
{
    uint8_t ch;
    int ret;

    for(;;) {
        ret = read(gdbstub_fd, &ch, 1);
        if (ret < 0) {
            if (errno != EINTR && errno != EAGAIN)
                return -1;
        } else if (ret == 0) {
            return -1;
        } else {
            break;
        }
    }
    return ch;
}

static void put_buffer(const uint8_t *buf, int len)
{
    int ret;

    while (len > 0) {
        ret = write(gdbstub_fd, buf, len);
        if (ret < 0) {
            if (errno != EINTR && errno != EAGAIN)
                return;
        } else {
            buf += ret;
            len -= ret;
        }
    }
}

static inline int fromhex(int v)
{
    if (v >= '0' && v <= '9')
        return v - '0';
    else if (v >= 'A' && v <= 'F')
        return v - 'A' + 10;
    else if (v >= 'a' && v <= 'f')
        return v - 'a' + 10;
    else
        return 0;
}

static inline int tohex(int v)
{
    if (v < 10)
        return v + '0';
    else
        return v - 10 + 'a';
}

static void memtohex(char *buf, const uint8_t *mem, int len)
{
    int i, c;
    char *q;
    q = buf;
    for(i = 0; i < len; i++) {
        c = mem[i];
        *q++ = tohex(c >> 4);
        *q++ = tohex(c & 0xf);
    }
    *q = '\0';
}

static void hextomem(uint8_t *mem, const char *buf, int len)
{
    int i;

    for(i = 0; i < len; i++) {
        mem[i] = (fromhex(buf[0]) << 4) | fromhex(buf[1]);
        buf += 2;
    }
}

/* return -1 if error or EOF */
static int get_packet(char *buf, int buf_size)
{
    int ch, len, csum, csum1;
    char reply[1];
    
    for(;;) {
        for(;;) {
            ch = get_char();
            if (ch < 0)
                return -1;
            if (ch == '$')
                break;
        }
        len = 0;
        csum = 0;
        for(;;) {
            ch = get_char();
            if (ch < 0)
                return -1;
            if (ch == '#')
                break;
            if (len > buf_size - 1)
                return -1;
            buf[len++] = ch;
            csum += ch;
        }
        buf[len] = '\0';
        ch = get_char();
        if (ch < 0)
            return -1;
        csum1 = fromhex(ch) << 4;
        ch = get_char();
        if (ch < 0)
            return -1;
        csum1 |= fromhex(ch);
        if ((csum & 0xff) != csum1) {
            reply[0] = '-';
            put_buffer(reply, 1);
        } else {
            reply[0] = '+';
            put_buffer(reply, 1);
            break;
        }
    }
#ifdef DEBUG_GDB
    printf("command='%s'\n", buf);
#endif
    return len;
}

/* return -1 if error, 0 if OK */
static int put_packet(char *buf)
{
    char buf1[3];
    int len, csum, ch, i;

#ifdef DEBUG_GDB
    printf("reply='%s'\n", buf);
#endif

    for(;;) {
        buf1[0] = '$';
        put_buffer(buf1, 1);
        len = strlen(buf);
        put_buffer(buf, len);
        csum = 0;
        for(i = 0; i < len; i++) {
            csum += buf[i];
        }
        buf1[0] = '#';
        buf1[1] = tohex((csum >> 4) & 0xf);
        buf1[2] = tohex((csum) & 0xf);

        put_buffer(buf1, 3);

        ch = get_char();
        if (ch < 0)
            return -1;
        if (ch == '+')
            break;
    }
    return 0;
}

#if defined(TARGET_I386)

static void to_le32(uint8_t *p, int v)
{
    p[0] = v;
    p[1] = v >> 8;
    p[2] = v >> 16;
    p[3] = v >> 24;
}

static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
{
    int i, fpus;

    for(i = 0; i < 8; i++) {
        to_le32(mem_buf + i * 4, env->regs[i]);
    }
    to_le32(mem_buf + 8 * 4, env->eip);
    to_le32(mem_buf + 9 * 4, env->eflags);
    to_le32(mem_buf + 10 * 4, env->segs[R_CS].selector);
    to_le32(mem_buf + 11 * 4, env->segs[R_SS].selector);
    to_le32(mem_buf + 12 * 4, env->segs[R_DS].selector);
    to_le32(mem_buf + 13 * 4, env->segs[R_ES].selector);
    to_le32(mem_buf + 14 * 4, env->segs[R_FS].selector);
    to_le32(mem_buf + 15 * 4, env->segs[R_GS].selector);
    /* XXX: convert floats */
    for(i = 0; i < 8; i++) {
        memcpy(mem_buf + 16 * 4 + i * 10, &env->fpregs[i], 10);
    }
    to_le32(mem_buf + 36 * 4, env->fpuc);
    fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
    to_le32(mem_buf + 37 * 4, fpus);
    to_le32(mem_buf + 38 * 4, 0); /* XXX: convert tags */
    to_le32(mem_buf + 39 * 4, 0); /* fiseg */
    to_le32(mem_buf + 40 * 4, 0); /* fioff */
    to_le32(mem_buf + 41 * 4, 0); /* foseg */
    to_le32(mem_buf + 42 * 4, 0); /* fooff */
    to_le32(mem_buf + 43 * 4, 0); /* fop */
    return 44 * 4;
}

static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
{
    uint32_t *registers = (uint32_t *)mem_buf;
    int i;

    for(i = 0; i < 8; i++) {
        env->regs[i] = tswapl(registers[i]);
    }
    env->eip = registers[8];
    env->eflags = registers[9];
#if defined(CONFIG_USER_ONLY)
#define LOAD_SEG(index, sreg)\
            if (tswapl(registers[index]) != env->segs[sreg].selector)\
                cpu_x86_load_seg(env, sreg, tswapl(registers[index]));
            LOAD_SEG(10, R_CS);
            LOAD_SEG(11, R_SS);
            LOAD_SEG(12, R_DS);
            LOAD_SEG(13, R_ES);
            LOAD_SEG(14, R_FS);
            LOAD_SEG(15, R_GS);
#endif
}

#elif defined (TARGET_PPC)
static void to_le32(uint8_t *p, int v)
{
    p[3] = v;
    p[2] = v >> 8;
    p[1] = v >> 16;
    p[0] = v >> 24;
}

static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
{
    uint32_t tmp;
    int i;

    /* fill in gprs */
    for(i = 0; i < 8; i++) {
        to_le32(mem_buf + i * 4, env->gpr[i]);
    }
    /* fill in fprs */
    for (i = 0; i < 32; i++) {
        to_le32(mem_buf + (i * 2) + 32, *((uint32_t *)&env->fpr[i]));
	to_le32(mem_buf + (i * 2) + 33, *((uint32_t *)&env->fpr[i] + 1));
    }
    /* nip, msr, ccr, lnk, ctr, xer, mq */
    to_le32(mem_buf + 96, tswapl(env->nip));
    to_le32(mem_buf + 97, tswapl(_load_msr()));
    to_le32(mem_buf + 98, 0);
    tmp = 0;
    for (i = 0; i < 8; i++)
        tmp |= env->crf[i] << (32 - (i * 4));
    to_le32(mem_buf + 98, tmp);
    to_le32(mem_buf + 99, tswapl(env->lr));
    to_le32(mem_buf + 100, tswapl(env->ctr));
    to_le32(mem_buf + 101, tswapl(_load_xer()));
    to_le32(mem_buf + 102, 0);

    return 102;
}

static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
{
    uint32_t *registers = (uint32_t *)mem_buf;
    int i;

    /* fill in gprs */
    for (i = 0; i < 32; i++) {
        env->gpr[i] = tswapl(registers[i]);
    }
    /* fill in fprs */
    for (i = 0; i < 32; i++) {
        *((uint32_t *)&env->fpr[i]) = tswapl(registers[(i * 2) + 32]);
	*((uint32_t *)&env->fpr[i] + 1) = tswapl(registers[(i * 2) + 33]);
    }
    /* nip, msr, ccr, lnk, ctr, xer, mq */
    env->nip = tswapl(registers[96]);
    _store_msr(tswapl(registers[97]));
    registers[98] = tswapl(registers[98]);
    for (i = 0; i < 8; i++)
        env->crf[i] = (registers[98] >> (32 - (i * 4))) & 0xF;
    env->lr = tswapl(registers[99]);
    env->ctr = tswapl(registers[100]);
    _store_xer(tswapl(registers[101]));
}
#else

static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
{
    return 0;
}

static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
{
}

#endif

/* port = 0 means default port */
int cpu_gdbstub(void *opaque, int (*main_loop)(void *opaque), int port)
{
    CPUState *env;
    const char *p;
    int ret, ch, reg_size, type;
    char buf[4096];
    uint8_t mem_buf[2000];
    uint32_t *registers;
    uint32_t addr, len;
    
    printf("Waiting gdb connection on port %d\n", port);
    if (gdbstub_open(port) < 0)
        return -1;
    printf("Connected\n");
    for(;;) {
        ret = get_packet(buf, sizeof(buf));
        if (ret < 0)
            break;
        p = buf;
        ch = *p++;
        switch(ch) {
        case '?':
            snprintf(buf, sizeof(buf), "S%02x", SIGTRAP);
            put_packet(buf);
            break;
        case 'c':
            if (*p != '\0') {
                addr = strtoul(p, (char **)&p, 16);
                env = cpu_gdbstub_get_env(opaque);
#if defined(TARGET_I386)
                env->eip = addr;
#elif defined (TARGET_PPC)
                env->nip = addr;
#endif
            }
            ret = main_loop(opaque);
            if (ret == EXCP_DEBUG)
                ret = SIGTRAP;
            else
                ret = 0;
            snprintf(buf, sizeof(buf), "S%02x", ret);
            put_packet(buf);
            break;
        case 's':
            env = cpu_gdbstub_get_env(opaque);
            if (*p != '\0') {
                addr = strtoul(p, (char **)&p, 16);
#if defined(TARGET_I386)
                env->eip = addr;
#elif defined (TARGET_PPC)
                env->nip = addr;
#endif
            }
            cpu_single_step(env, 1);
            ret = main_loop(opaque);
            cpu_single_step(env, 0);
            if (ret == EXCP_DEBUG)
                ret = SIGTRAP;
            else
                ret = 0;
            snprintf(buf, sizeof(buf), "S%02x", ret);
            put_packet(buf);
            break;
        case 'g':
            env = cpu_gdbstub_get_env(opaque);
            reg_size = cpu_gdb_read_registers(env, mem_buf);
            memtohex(buf, mem_buf, reg_size);
            put_packet(buf);
            break;
        case 'G':
            env = cpu_gdbstub_get_env(opaque);
            registers = (void *)mem_buf;
            len = strlen(p) / 2;
            hextomem((uint8_t *)registers, p, len);
            cpu_gdb_write_registers(env, mem_buf, len);
            put_packet("OK");
            break;
        case 'm':
            env = cpu_gdbstub_get_env(opaque);
            addr = strtoul(p, (char **)&p, 16);
            if (*p == ',')
                p++;
            len = strtoul(p, NULL, 16);
            if (cpu_memory_rw_debug(env, addr, mem_buf, len, 0) != 0)
                memset(mem_buf, 0, len);
            memtohex(buf, mem_buf, len);
            put_packet(buf);
            break;
        case 'M':
            env = cpu_gdbstub_get_env(opaque);
            addr = strtoul(p, (char **)&p, 16);
            if (*p == ',')
                p++;
            len = strtoul(p, (char **)&p, 16);
            if (*p == ',')
                p++;
            hextomem(mem_buf, p, len);
            if (cpu_memory_rw_debug(env, addr, mem_buf, len, 1) != 0)
                put_packet("ENN");
            else
                put_packet("OK");
            break;
        case 'Z':
            type = strtoul(p, (char **)&p, 16);
            if (*p == ',')
                p++;
            addr = strtoul(p, (char **)&p, 16);
            if (*p == ',')
                p++;
            len = strtoul(p, (char **)&p, 16);
            if (type == 0 || type == 1) {
                env = cpu_gdbstub_get_env(opaque);
                if (cpu_breakpoint_insert(env, addr) < 0)
                    goto breakpoint_error;
                put_packet("OK");
            } else {
            breakpoint_error:
                put_packet("ENN");
            }
            break;
        case 'z':
            type = strtoul(p, (char **)&p, 16);
            if (*p == ',')
                p++;
            addr = strtoul(p, (char **)&p, 16);
            if (*p == ',')
                p++;
            len = strtoul(p, (char **)&p, 16);
            if (type == 0 || type == 1) {
                env = cpu_gdbstub_get_env(opaque);
                cpu_breakpoint_remove(env, addr);
                put_packet("OK");
            } else {
                goto breakpoint_error;
            }
            break;
        default:
            //        unknown_command:
            /* put empty packet */
            buf[0] = '\0';
            put_packet(buf);
            break;
        }
    }
    return 0;
}
Commit	Line	Data
b4608c04 FB	1	/*
	2	* gdb server stub
	3	*
	4	* Copyright (c) 2003 Fabrice Bellard
	5	*
	6	* This library is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU Lesser General Public
	8	* License as published by the Free Software Foundation; either
	9	* version 2 of the License, or (at your option) any later version.
	10	*
	11	* This library is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* Lesser General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public
	17	* License along with this library; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*/
	20	#include <stdlib.h>
	21	#include <stdio.h>
	22	#include <string.h>
	23	#include <unistd.h>
	24	#include <errno.h>
	25	#include <sys/socket.h>
	26	#include <netinet/in.h>
	27	#include <netinet/tcp.h>
	28	#include <signal.h>
	29
6180a181	30	#include "cpu.h"
6180a181	31	#include "exec-all.h"
b4608c04	32
4abe615b	33	//#define DEBUG_GDB
b4608c04 FB	34
	35	int gdbstub_fd = -1;
	36
	37	/* return 0 if OK */
	38	static int gdbstub_open(int port)
	39	{
	40	struct sockaddr_in sockaddr;
	41	socklen_t len;
	42	int fd, val, ret;
	43
	44	fd = socket(PF_INET, SOCK_STREAM, 0);
	45	if (fd < 0) {
	46	perror("socket");
	47	return -1;
	48	}
	49
	50	/* allow fast reuse */
	51	val = 1;
	52	setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
	53
	54	sockaddr.sin_family = AF_INET;
	55	sockaddr.sin_port = htons(port);
	56	sockaddr.sin_addr.s_addr = 0;
	57	ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr));
	58	if (ret < 0) {
	59	perror("bind");
	60	return -1;
	61	}
	62	ret = listen(fd, 0);
	63	if (ret < 0) {
	64	perror("listen");
	65	return -1;
	66	}
	67
	68	/* now wait for one connection */
	69	for(;;) {
	70	len = sizeof(sockaddr);
	71	gdbstub_fd = accept(fd, (struct sockaddr *)&sockaddr, &len);
	72	if (gdbstub_fd < 0 && errno != EINTR) {
	73	perror("accept");
	74	return -1;
	75	} else if (gdbstub_fd >= 0) {
	76	break;
	77	}
	78	}
	79
	80	/* set short latency */
	81	val = 1;
	82	setsockopt(gdbstub_fd, SOL_TCP, TCP_NODELAY, &val, sizeof(val));
	83	return 0;
	84	}
	85
	86	static int get_char(void)
	87	{
	88	uint8_t ch;
	89	int ret;
	90
	91	for(;;) {
	92	ret = read(gdbstub_fd, &ch, 1);
	93	if (ret < 0) {
	94	if (errno != EINTR && errno != EAGAIN)
	95	return -1;
	96	} else if (ret == 0) {
	97	return -1;
98	} else {
99	break;
100	}
101	}
102	return ch;
103	}
104
105	static void put_buffer(const uint8_t *buf, int len)
106	{
107	int ret;
108
109	while (len > 0) {
110	ret = write(gdbstub_fd, buf, len);
111	if (ret < 0) {
112	if (errno != EINTR && errno != EAGAIN)
113	return;
114	} else {
115	buf += ret;
116	len -= ret;
117	}
118	}
119	}
120
121	static inline int fromhex(int v)
122	{
123	if (v >= '0' && v <= '9')
124	return v - '0';
125	else if (v >= 'A' && v <= 'F')
126	return v - 'A' + 10;
127	else if (v >= 'a' && v <= 'f')
128	return v - 'a' + 10;
129	else
130	return 0;
131	}
132
133	static inline int tohex(int v)
134	{
135	if (v < 10)
136	return v + '0';
137	else
138	return v - 10 + 'a';
139	}
140
141	static void memtohex(char buf, const uint8_t mem, int len)
142	{
143	int i, c;
144	char *q;
145	q = buf;
146	for(i = 0; i < len; i++) {
147	c = mem[i];
148	*q++ = tohex(c >> 4);
149	*q++ = tohex(c & 0xf);
150	}
151	*q = '\0';
152	}
153
154	static void hextomem(uint8_t mem, const char buf, int len)
155	{
156	int i;
157
158	for(i = 0; i < len; i++) {
159	mem[i] = (fromhex(buf[0]) << 4) \| fromhex(buf[1]);
160	buf += 2;
161	}
162	}
163
164	/* return -1 if error or EOF */
165	static int get_packet(char *buf, int buf_size)
166	{
167	int ch, len, csum, csum1;
168	char reply[1];
169
170	for(;;) {
171	for(;;) {
172	ch = get_char();
173	if (ch < 0)
174	return -1;
175	if (ch == '$')
176	break;
177	}
178	len = 0;
179	csum = 0;
180	for(;;) {
181	ch = get_char();
182	if (ch < 0)
183	return -1;
184	if (ch == '#')
185	break;
186	if (len > buf_size - 1)
187	return -1;
188	buf[len++] = ch;
189	csum += ch;
190	}
191	buf[len] = '\0';
192	ch = get_char();
193	if (ch < 0)
194	return -1;
195	csum1 = fromhex(ch) << 4;
196	ch = get_char();
197	if (ch < 0)
198	return -1;
199	csum1 \|= fromhex(ch);
200	if ((csum & 0xff) != csum1) {
201	reply[0] = '-';
202	put_buffer(reply, 1);
203	} else {
204	reply[0] = '+';
205	put_buffer(reply, 1);
206	break;
207	}
208	}
209	#ifdef DEBUG_GDB
210	printf("command='%s'\n", buf);
211	#endif
212	return len;
213	}
214
215	/* return -1 if error, 0 if OK */
216	static int put_packet(char *buf)
217	{
218	char buf1[3];
219	int len, csum, ch, i;
220
221	#ifdef DEBUG_GDB
222	printf("reply='%s'\n", buf);
223	#endif
224
225	for(;;) {
226	buf1[0] = '$';
227	put_buffer(buf1, 1);
228	len = strlen(buf);
229	put_buffer(buf, len);
230	csum = 0;
231	for(i = 0; i < len; i++) {
232	csum += buf[i];
233	}
234	buf1[0] = '#';
235	buf1[1] = tohex((csum >> 4) & 0xf);
236	buf1[2] = tohex((csum) & 0xf);
237
238	put_buffer(buf1, 3);
239
240	ch = get_char();
241	if (ch < 0)
242	return -1;
243	if (ch == '+')
244	break;
245	}
246	return 0;
247	}
248
6da41eaf FB	249	#if defined(TARGET_I386)
	250
	251	static void to_le32(uint8_t *p, int v)
	252	{
	253	p[0] = v;
	254	p[1] = v >> 8;
	255	p[2] = v >> 16;
	256	p[3] = v >> 24;
	257	}
	258
	259	static int cpu_gdb_read_registers(CPUState env, uint8_t mem_buf)
	260	{
	261	int i, fpus;
	262
	263	for(i = 0; i < 8; i++) {
	264	to_le32(mem_buf + i * 4, env->regs[i]);
	265	}
	266	to_le32(mem_buf + 8 * 4, env->eip);
	267	to_le32(mem_buf + 9 * 4, env->eflags);
	268	to_le32(mem_buf + 10 * 4, env->segs[R_CS].selector);
	269	to_le32(mem_buf + 11 * 4, env->segs[R_SS].selector);
	270	to_le32(mem_buf + 12 * 4, env->segs[R_DS].selector);
	271	to_le32(mem_buf + 13 * 4, env->segs[R_ES].selector);
	272	to_le32(mem_buf + 14 * 4, env->segs[R_FS].selector);
	273	to_le32(mem_buf + 15 * 4, env->segs[R_GS].selector);
	274	/* XXX: convert floats */
	275	for(i = 0; i < 8; i++) {
	276	memcpy(mem_buf + 16 * 4 + i * 10, &env->fpregs[i], 10);
	277	}
	278	to_le32(mem_buf + 36 * 4, env->fpuc);
	279	fpus = (env->fpus & ~0x3800) \| (env->fpstt & 0x7) << 11;
	280	to_le32(mem_buf + 37 * 4, fpus);
	281	to_le32(mem_buf + 38 * 4, 0); /* XXX: convert tags */
	282	to_le32(mem_buf + 39 * 4, 0); /* fiseg */
	283	to_le32(mem_buf + 40 * 4, 0); /* fioff */
	284	to_le32(mem_buf + 41 * 4, 0); /* foseg */
	285	to_le32(mem_buf + 42 * 4, 0); /* fooff */
	286	to_le32(mem_buf + 43 * 4, 0); /* fop */
	287	return 44 * 4;
	288	}
	289
	290	static void cpu_gdb_write_registers(CPUState env, uint8_t mem_buf, int size)
	291	{
	292	uint32_t registers = (uint32_t )mem_buf;
	293	int i;
	294
	295	for(i = 0; i < 8; i++) {
	296	env->regs[i] = tswapl(registers[i]);
	297	}
	298	env->eip = registers[8];
	299	env->eflags = registers[9];
	300	#if defined(CONFIG_USER_ONLY)
	301	#define LOAD_SEG(index, sreg)\
	302	if (tswapl(registers[index]) != env->segs[sreg].selector)\
	303	cpu_x86_load_seg(env, sreg, tswapl(registers[index]));
	304	LOAD_SEG(10, R_CS);
	305	LOAD_SEG(11, R_SS);
	306	LOAD_SEG(12, R_DS);
	307	LOAD_SEG(13, R_ES);
	308	LOAD_SEG(14, R_FS);
	309	LOAD_SEG(15, R_GS);
	310	#endif
	311	}
	312
9e62fd7f FB	313	#elif defined (TARGET_PPC)
	314	static void to_le32(uint8_t *p, int v)
	315	{
	316	p[3] = v;
	317	p[2] = v >> 8;
	318	p[1] = v >> 16;
	319	p[0] = v >> 24;
	320	}
	321
	322	static int cpu_gdb_read_registers(CPUState env, uint8_t mem_buf)
	323	{
	324	uint32_t tmp;
	325	int i;
	326
	327	/* fill in gprs */
	328	for(i = 0; i < 8; i++) {
	329	to_le32(mem_buf + i * 4, env->gpr[i]);
	330	}
	331	/* fill in fprs */
	332	for (i = 0; i < 32; i++) {
	333	to_le32(mem_buf + (i * 2) + 32, ((uint32_t )&env->fpr[i]));
	334	to_le32(mem_buf + (i * 2) + 33, ((uint32_t )&env->fpr[i] + 1));
	335	}
	336	/* nip, msr, ccr, lnk, ctr, xer, mq */
	337	to_le32(mem_buf + 96, tswapl(env->nip));
	338	to_le32(mem_buf + 97, tswapl(_load_msr()));
	339	to_le32(mem_buf + 98, 0);
	340	tmp = 0;
	341	for (i = 0; i < 8; i++)
	342	tmp \|= env->crf[i] << (32 - (i * 4));
	343	to_le32(mem_buf + 98, tmp);
	344	to_le32(mem_buf + 99, tswapl(env->lr));
	345	to_le32(mem_buf + 100, tswapl(env->ctr));
	346	to_le32(mem_buf + 101, tswapl(_load_xer()));
	347	to_le32(mem_buf + 102, 0);
	348
	349	return 102;
	350	}
	351
	352	static void cpu_gdb_write_registers(CPUState env, uint8_t mem_buf, int size)
	353	{
	354	uint32_t registers = (uint32_t )mem_buf;
	355	int i;
	356
	357	/* fill in gprs */
	358	for (i = 0; i < 32; i++) {
	359	env->gpr[i] = tswapl(registers[i]);
	360	}
	361	/* fill in fprs */
	362	for (i = 0; i < 32; i++) {
	363	((uint32_t )&env->fpr[i]) = tswapl(registers[(i * 2) + 32]);
	364	((uint32_t )&env->fpr[i] + 1) = tswapl(registers[(i * 2) + 33]);
	365	}
	366	/* nip, msr, ccr, lnk, ctr, xer, mq */
	367	env->nip = tswapl(registers[96]);
	368	_store_msr(tswapl(registers[97]));
	369	registers[98] = tswapl(registers[98]);
	370	for (i = 0; i < 8; i++)
	371	env->crf[i] = (registers[98] >> (32 - (i * 4))) & 0xF;
	372	env->lr = tswapl(registers[99]);
	373	env->ctr = tswapl(registers[100]);
	374	_store_xer(tswapl(registers[101]));
	375	}
6da41eaf FB	376	#else
	377
	378	static int cpu_gdb_read_registers(CPUState env, uint8_t mem_buf)
	379	{
	380	return 0;
	381	}
	382
	383	static void cpu_gdb_write_registers(CPUState env, uint8_t mem_buf, int size)
	384	{
	385	}
	386
	387	#endif
b4608c04 FB	388
b4608c04 FB	389	/* port = 0 means default port */
4c3a88a2	390	int cpu_gdbstub(void opaque, int (main_loop)(void *opaque), int port)
b4608c04 FB	391	{
	392	CPUState *env;
	393	const char *p;
6da41eaf	394	int ret, ch, reg_size, type;
b4608c04 FB	395	char buf[4096];
	396	uint8_t mem_buf[2000];
	397	uint32_t *registers;
	398	uint32_t addr, len;
	399
	400	printf("Waiting gdb connection on port %d\n", port);
	401	if (gdbstub_open(port) < 0)
	402	return -1;
	403	printf("Connected\n");
	404	for(;;) {
	405	ret = get_packet(buf, sizeof(buf));
	406	if (ret < 0)
	407	break;
	408	p = buf;
	409	ch = *p++;
	410	switch(ch) {
	411	case '?':
	412	snprintf(buf, sizeof(buf), "S%02x", SIGTRAP);
	413	put_packet(buf);
	414	break;
	415	case 'c':
4c3a88a2 FB	416	if (*p != '\0') {
	417	addr = strtoul(p, (char **)&p, 16);
	418	env = cpu_gdbstub_get_env(opaque);
	419	#if defined(TARGET_I386)
	420	env->eip = addr;
5be1a8e0 FB	421	#elif defined (TARGET_PPC)
5be1a8e0 FB	422	env->nip = addr;
4c3a88a2 FB	423	#endif
	424	}
	425	ret = main_loop(opaque);
	426	if (ret == EXCP_DEBUG)
	427	ret = SIGTRAP;
	428	else
	429	ret = 0;
	430	snprintf(buf, sizeof(buf), "S%02x", ret);
b4608c04 FB	431	put_packet(buf);
b4608c04 FB	432	break;
c33a346e FB	433	case 's':
	434	env = cpu_gdbstub_get_env(opaque);
	435	if (*p != '\0') {
	436	addr = strtoul(p, (char **)&p, 16);
	437	#if defined(TARGET_I386)
	438	env->eip = addr;
5be1a8e0 FB	439	#elif defined (TARGET_PPC)
5be1a8e0 FB	440	env->nip = addr;
c33a346e FB	441	#endif
	442	}
	443	cpu_single_step(env, 1);
	444	ret = main_loop(opaque);
	445	cpu_single_step(env, 0);
	446	if (ret == EXCP_DEBUG)
	447	ret = SIGTRAP;
	448	else
	449	ret = 0;
	450	snprintf(buf, sizeof(buf), "S%02x", ret);
	451	put_packet(buf);
	452	break;
b4608c04 FB	453	case 'g':
b4608c04 FB	454	env = cpu_gdbstub_get_env(opaque);
6da41eaf FB	455	reg_size = cpu_gdb_read_registers(env, mem_buf);
6da41eaf FB	456	memtohex(buf, mem_buf, reg_size);
b4608c04 FB	457	put_packet(buf);
	458	break;
	459	case 'G':
	460	env = cpu_gdbstub_get_env(opaque);
	461	registers = (void *)mem_buf;
6da41eaf FB	462	len = strlen(p) / 2;
	463	hextomem((uint8_t *)registers, p, len);
	464	cpu_gdb_write_registers(env, mem_buf, len);
b4608c04 FB	465	put_packet("OK");
	466	break;
	467	case 'm':
13eb76e0	468	env = cpu_gdbstub_get_env(opaque);
b4608c04 FB	469	addr = strtoul(p, (char **)&p, 16);
	470	if (*p == ',')
	471	p++;
	472	len = strtoul(p, NULL, 16);
8b1f24b0	473	if (cpu_memory_rw_debug(env, addr, mem_buf, len, 0) != 0)
b4608c04 FB	474	memset(mem_buf, 0, len);
	475	memtohex(buf, mem_buf, len);
	476	put_packet(buf);
	477	break;
	478	case 'M':
13eb76e0	479	env = cpu_gdbstub_get_env(opaque);
b4608c04 FB	480	addr = strtoul(p, (char **)&p, 16);
	481	if (*p == ',')
	482	p++;
	483	len = strtoul(p, (char **)&p, 16);
	484	if (*p == ',')
	485	p++;
	486	hextomem(mem_buf, p, len);
8b1f24b0	487	if (cpu_memory_rw_debug(env, addr, mem_buf, len, 1) != 0)
b4608c04 FB	488	put_packet("ENN");
	489	else
	490	put_packet("OK");
	491	break;
4c3a88a2 FB	492	case 'Z':
	493	type = strtoul(p, (char **)&p, 16);
	494	if (*p == ',')
	495	p++;
	496	addr = strtoul(p, (char **)&p, 16);
	497	if (*p == ',')
	498	p++;
	499	len = strtoul(p, (char **)&p, 16);
	500	if (type == 0 \|\| type == 1) {
	501	env = cpu_gdbstub_get_env(opaque);
	502	if (cpu_breakpoint_insert(env, addr) < 0)
	503	goto breakpoint_error;
	504	put_packet("OK");
	505	} else {
	506	breakpoint_error:
	507	put_packet("ENN");
	508	}
	509	break;
	510	case 'z':
	511	type = strtoul(p, (char **)&p, 16);
	512	if (*p == ',')
	513	p++;
	514	addr = strtoul(p, (char **)&p, 16);
	515	if (*p == ',')
	516	p++;
	517	len = strtoul(p, (char **)&p, 16);
	518	if (type == 0 \|\| type == 1) {
	519	env = cpu_gdbstub_get_env(opaque);
	520	cpu_breakpoint_remove(env, addr);
	521	put_packet("OK");
	522	} else {
	523	goto breakpoint_error;
	524	}
	525	break;
b4608c04	526	default:
f193c797	527	// unknown_command:
b4608c04 FB	528	/* put empty packet */
	529	buf[0] = '\0';
	530	put_packet(buf);
	531	break;
	532	}
	533	}
	534	return 0;
	535	}