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/*
* gdb server stub
ths
authored
18 years ago
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*
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* Copyright ( c ) 2003 - 2005 Fabrice Bellard
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*
* 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
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* Foundation , Inc ., 51 Franklin Street , Fifth Floor , Boston MA 02110 - 1301 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
# include < stdlib . h >
# include < stdio . h >
# include < stdarg . h >
# include < string . h >
# include < errno . h >
# include < unistd . h >
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# include < fcntl . h >
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# include "qemu.h"
# else
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# include "monitor.h"
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# include "qemu-char.h"
# include "sysemu.h"
# 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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# include "kvm.h"
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enum {
GDB_SIGNAL_0 = 0 ,
GDB_SIGNAL_INT = 2 ,
GDB_SIGNAL_TRAP = 5 ,
GDB_SIGNAL_UNKNOWN = 143
};
# ifdef CONFIG_USER_ONLY
/* Map target signal numbers to GDB protocol signal numbers and vice
* versa . For user emulation ' s currently supported systems , we can
* assume most signals are defined .
*/
static int gdb_signal_table [] = {
0 ,
TARGET_SIGHUP ,
TARGET_SIGINT ,
TARGET_SIGQUIT ,
TARGET_SIGILL ,
TARGET_SIGTRAP ,
TARGET_SIGABRT ,
- 1 , /* SIGEMT */
TARGET_SIGFPE ,
TARGET_SIGKILL ,
TARGET_SIGBUS ,
TARGET_SIGSEGV ,
TARGET_SIGSYS ,
TARGET_SIGPIPE ,
TARGET_SIGALRM ,
TARGET_SIGTERM ,
TARGET_SIGURG ,
TARGET_SIGSTOP ,
TARGET_SIGTSTP ,
TARGET_SIGCONT ,
TARGET_SIGCHLD ,
TARGET_SIGTTIN ,
TARGET_SIGTTOU ,
TARGET_SIGIO ,
TARGET_SIGXCPU ,
TARGET_SIGXFSZ ,
TARGET_SIGVTALRM ,
TARGET_SIGPROF ,
TARGET_SIGWINCH ,
- 1 , /* SIGLOST */
TARGET_SIGUSR1 ,
TARGET_SIGUSR2 ,
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# ifdef TARGET_SIGPWR
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TARGET_SIGPWR ,
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# else
- 1 ,
# endif
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- 1 , /* SIGPOLL */
- 1 ,
- 1 ,
- 1 ,
- 1 ,
- 1 ,
- 1 ,
- 1 ,
- 1 ,
- 1 ,
- 1 ,
- 1 ,
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# ifdef __SIGRTMIN
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__SIGRTMIN + 1 ,
__SIGRTMIN + 2 ,
__SIGRTMIN + 3 ,
__SIGRTMIN + 4 ,
__SIGRTMIN + 5 ,
__SIGRTMIN + 6 ,
__SIGRTMIN + 7 ,
__SIGRTMIN + 8 ,
__SIGRTMIN + 9 ,
__SIGRTMIN + 10 ,
__SIGRTMIN + 11 ,
__SIGRTMIN + 12 ,
__SIGRTMIN + 13 ,
__SIGRTMIN + 14 ,
__SIGRTMIN + 15 ,
__SIGRTMIN + 16 ,
__SIGRTMIN + 17 ,
__SIGRTMIN + 18 ,
__SIGRTMIN + 19 ,
__SIGRTMIN + 20 ,
__SIGRTMIN + 21 ,
__SIGRTMIN + 22 ,
__SIGRTMIN + 23 ,
__SIGRTMIN + 24 ,
__SIGRTMIN + 25 ,
__SIGRTMIN + 26 ,
__SIGRTMIN + 27 ,
__SIGRTMIN + 28 ,
__SIGRTMIN + 29 ,
__SIGRTMIN + 30 ,
__SIGRTMIN + 31 ,
- 1 , /* SIGCANCEL */
__SIGRTMIN ,
__SIGRTMIN + 32 ,
__SIGRTMIN + 33 ,
__SIGRTMIN + 34 ,
__SIGRTMIN + 35 ,
__SIGRTMIN + 36 ,
__SIGRTMIN + 37 ,
__SIGRTMIN + 38 ,
__SIGRTMIN + 39 ,
__SIGRTMIN + 40 ,
__SIGRTMIN + 41 ,
__SIGRTMIN + 42 ,
__SIGRTMIN + 43 ,
__SIGRTMIN + 44 ,
__SIGRTMIN + 45 ,
__SIGRTMIN + 46 ,
__SIGRTMIN + 47 ,
__SIGRTMIN + 48 ,
__SIGRTMIN + 49 ,
__SIGRTMIN + 50 ,
__SIGRTMIN + 51 ,
__SIGRTMIN + 52 ,
__SIGRTMIN + 53 ,
__SIGRTMIN + 54 ,
__SIGRTMIN + 55 ,
__SIGRTMIN + 56 ,
__SIGRTMIN + 57 ,
__SIGRTMIN + 58 ,
__SIGRTMIN + 59 ,
__SIGRTMIN + 60 ,
__SIGRTMIN + 61 ,
__SIGRTMIN + 62 ,
__SIGRTMIN + 63 ,
__SIGRTMIN + 64 ,
__SIGRTMIN + 65 ,
__SIGRTMIN + 66 ,
__SIGRTMIN + 67 ,
__SIGRTMIN + 68 ,
__SIGRTMIN + 69 ,
__SIGRTMIN + 70 ,
__SIGRTMIN + 71 ,
__SIGRTMIN + 72 ,
__SIGRTMIN + 73 ,
__SIGRTMIN + 74 ,
__SIGRTMIN + 75 ,
__SIGRTMIN + 76 ,
__SIGRTMIN + 77 ,
__SIGRTMIN + 78 ,
__SIGRTMIN + 79 ,
__SIGRTMIN + 80 ,
__SIGRTMIN + 81 ,
__SIGRTMIN + 82 ,
__SIGRTMIN + 83 ,
__SIGRTMIN + 84 ,
__SIGRTMIN + 85 ,
__SIGRTMIN + 86 ,
__SIGRTMIN + 87 ,
__SIGRTMIN + 88 ,
__SIGRTMIN + 89 ,
__SIGRTMIN + 90 ,
__SIGRTMIN + 91 ,
__SIGRTMIN + 92 ,
__SIGRTMIN + 93 ,
__SIGRTMIN + 94 ,
__SIGRTMIN + 95 ,
- 1 , /* SIGINFO */
- 1 , /* UNKNOWN */
- 1 , /* DEFAULT */
- 1 ,
- 1 ,
- 1 ,
- 1 ,
- 1 ,
- 1
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# endif
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};
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# else
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/* In system mode we only need SIGINT and SIGTRAP ; other signals
are not yet supported . */
enum {
TARGET_SIGINT = 2 ,
TARGET_SIGTRAP = 5
};
static int gdb_signal_table [] = {
- 1 ,
- 1 ,
TARGET_SIGINT ,
- 1 ,
- 1 ,
TARGET_SIGTRAP
};
# endif
# ifdef CONFIG_USER_ONLY
static int target_signal_to_gdb ( int sig )
{
int i ;
for ( i = 0 ; i < ARRAY_SIZE ( gdb_signal_table ); i ++ )
if ( gdb_signal_table [ i ] == sig )
return i ;
return GDB_SIGNAL_UNKNOWN ;
}
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# endif
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static int gdb_signal_to_target ( int sig )
{
if ( sig < ARRAY_SIZE ( gdb_signal_table ))
return gdb_signal_table [ sig ];
else
return - 1 ;
}
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// # define DEBUG_GDB
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typedef struct GDBRegisterState {
int base_reg ;
int num_regs ;
gdb_reg_cb get_reg ;
gdb_reg_cb set_reg ;
const char * xml ;
struct GDBRegisterState * next ;
} GDBRegisterState ;
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enum RSState {
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RS_INACTIVE ,
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RS_IDLE ,
RS_GETLINE ,
RS_CHKSUM1 ,
RS_CHKSUM2 ,
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RS_SYSCALL ,
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};
typedef struct GDBState {
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CPUState * c_cpu ; /* current CPU for step/continue ops */
CPUState * g_cpu ; /* current CPU for other ops */
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 ;
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
CharDriverState * chr ;
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CharDriverState * mon_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
* make single stepping like an ICE HW step .
*/
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 .
If gdb sends qXfer : features : read then assume we ' re talking to a newish
gdb that understands target descriptions . */
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? */
static int gdbserver_fd = - 1 ;
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static int get_char ( GDBState * s )
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{
uint8_t ch ;
int ret ;
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 )
s -> fd = - 1 ;
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if ( errno != EINTR && errno != EAGAIN )
return - 1 ;
} else if ( ret == 0 ) {
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close ( s -> fd );
s -> fd = - 1 ;
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return - 1 ;
} else {
break ;
}
}
return ch ;
}
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# endif
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static gdb_syscall_complete_cb gdb_current_syscall_cb ;
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static enum {
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GDB_SYS_UNKNOWN ,
GDB_SYS_ENABLED ,
GDB_SYS_DISABLED ,
} gdb_syscall_mode ;
/* If gdb is connected when the first semihosting syscall occurs then use
remote gdb syscalls . Otherwise use native file IO . */
int use_gdb_syscalls ( void )
{
if ( gdb_syscall_mode == GDB_SYS_UNKNOWN ) {
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gdb_syscall_mode = ( gdbserver_state ? GDB_SYS_ENABLED
: GDB_SYS_DISABLED );
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}
return gdb_syscall_mode == GDB_SYS_ENABLED ;
}
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/* Resume execution. */
static inline void gdb_continue ( GDBState * s )
{
# ifdef CONFIG_USER_ONLY
s -> running_state = 1 ;
# else
vm_start ();
# endif
}
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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 ;
while ( len > 0 ) {
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ret = send ( s -> fd , buf , len , 0 );
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if ( ret < 0 ) {
if ( errno != EINTR && errno != EAGAIN )
return ;
} else {
buf += ret ;
len -= ret ;
}
}
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# else
qemu_chr_write ( s -> chr , buf , len );
# endif
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}
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, 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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17 years ago
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uint8_t * p ;
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for (;;) {
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p = s -> last_packet ;
* ( p ++ ) = '$' ;
memcpy ( p , buf , len );
p += len ;
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csum = 0 ;
for ( i = 0 ; i < len ; i ++ ) {
csum += buf [ i ];
}
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* ( p ++ ) = '#' ;
* ( p ++ ) = tohex (( csum >> 4 ) & 0xf );
* ( p ++ ) = tohex (( csum ) & 0xf );
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s -> last_packet_len = p - s -> last_packet ;
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17 years ago
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put_buffer ( s , ( uint8_t * ) s -> last_packet , s -> last_packet_len );
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# ifdef CONFIG_USER_ONLY
i = get_char ( s );
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
break ;
# endif
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}
return 0 ;
}
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/* return -1 if error, 0 if OK */
static int put_packet ( GDBState * s , const char * buf )
{
# ifdef DEBUG_GDB
printf ( "reply='%s' \n " , buf );
# endif
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return put_packet_binary ( s , buf , strlen ( buf ));
}
/* The GDB remote protocol transfers values in target byte order . This means
we can use the raw memory access routines to access the value buffer .
Conveniently , these also handle the case where the buffer is mis - aligned .
*/
# define GET_REG8 ( val ) do { \
stb_p ( mem_buf , val ) ; \
return 1 ; \
} while ( 0 )
# define GET_REG16 ( val ) do { \
stw_p ( mem_buf , val ) ; \
return 2 ; \
} while ( 0 )
# define GET_REG32 ( val ) do { \
stl_p ( mem_buf , val ) ; \
return 4 ; \
} while ( 0 )
# define GET_REG64 ( val ) do { \
stq_p ( mem_buf , val ) ; \
return 8 ; \
} while ( 0 )
# if TARGET_LONG_BITS == 64
# define GET_REGL ( val ) GET_REG64 ( val )
# define ldtul_p ( addr ) ldq_p ( addr )
# else
# define GET_REGL ( val ) GET_REG32 ( val )
# 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 ] = {
R_EAX , R_EBX , R_ECX , R_EDX , R_ESI , R_EDI , R_EBP , R_ESP ,
8 , 9 , 10 , 11 , 12 , 13 , 14 , 15
};
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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 )
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 ) {
GET_REGL ( env -> regs [ gpr_map [ n ]]) ;
} else if ( n >= CPU_NB_REGS + 8 && n < CPU_NB_REGS + 16 ) {
/* FIXME: byteswap float values. */
# ifdef USE_X86LDOUBLE
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 ;
} else if ( n >= CPU_NB_REGS + 24 ) {
n -= CPU_NB_REGS + 24 ;
if ( n < CPU_NB_REGS ) {
stq_p ( mem_buf , env -> xmm_regs [ n ]. XMM_Q ( 0 )) ;
stq_p ( mem_buf + 8 , env -> xmm_regs [ n ]. XMM_Q ( 1 )) ;
return 16 ;
} else if ( n == CPU_NB_REGS ) {
GET_REG32 ( env -> mxcsr ) ;
}
} else {
n -= CPU_NB_REGS ;
switch ( n ) {
case 0 : GET_REGL ( env -> eip ) ;
case 1 : GET_REG32 ( env -> eflags ) ;
case 2 : GET_REG32 ( env -> segs [ R_CS ]. selector ) ;
case 3 : GET_REG32 ( env -> segs [ R_SS ]. selector ) ;
case 4 : GET_REG32 ( env -> segs [ R_DS ]. selector ) ;
case 5 : GET_REG32 ( env -> segs [ R_ES ]. selector ) ;
case 6 : GET_REG32 ( env -> segs [ R_FS ]. selector ) ;
case 7 : GET_REG32 ( env -> segs [ R_GS ]. selector ) ;
/* 8...15 x87 regs. */
case 16 : GET_REG32 ( env -> fpuc ) ;
case 17 : GET_REG32 (( env -> fpus & ~ 0x3800 ) | ( env -> fpstt & 0x7 ) << 11 ) ;
case 18 : GET_REG32 ( 0 ) ; /* ftag */
case 19 : GET_REG32 ( 0 ) ; /* fiseg */
case 20 : GET_REG32 ( 0 ) ; /* fioff */
case 21 : GET_REG32 ( 0 ) ; /* foseg */
case 22 : GET_REG32 ( 0 ) ; /* fooff */
case 23 : GET_REG32 ( 0 ) ; /* fop */
/* 24+ xmm regs. */
}
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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 ;
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if ( i < CPU_NB_REGS ) {
env -> regs [ gpr_map [ i ]] = ldtul_p ( mem_buf ) ;
return sizeof ( target_ulong ) ;
} else if ( i >= CPU_NB_REGS + 8 && i < CPU_NB_REGS + 16 ) {
i -= CPU_NB_REGS + 8 ;
# ifdef USE_X86LDOUBLE
memcpy ( & env -> fpregs [ i ], mem_buf , 10 ) ;
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# endif
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return 10 ;
} else if ( i >= CPU_NB_REGS + 24 ) {
i -= CPU_NB_REGS + 24 ;
if ( i < CPU_NB_REGS ) {
env -> xmm_regs [ i ]. XMM_Q ( 0 ) = ldq_p ( mem_buf ) ;
env -> xmm_regs [ i ]. XMM_Q ( 1 ) = ldq_p ( mem_buf + 8 ) ;
return 16 ;
} else if ( i == CPU_NB_REGS ) {
env -> mxcsr = ldl_p ( mem_buf ) ;
return 4 ;
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}
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} else {
i -= CPU_NB_REGS ;
switch ( i ) {
case 0 : env -> eip = ldtul_p ( mem_buf ) ; return sizeof ( target_ulong ) ;
case 1 : env -> eflags = ldl_p ( mem_buf ) ; return 4 ;
# if defined ( CONFIG_USER_ONLY )
# define LOAD_SEG ( index , sreg ) \
tmp = ldl_p ( mem_buf ) ;\
if ( tmp != env -> segs [ sreg ]. selector ) \
cpu_x86_load_seg ( env , sreg , tmp ) ;
# else
/* FIXME : Honor segment registers . Needs to avoid raising an exception
when the selector is invalid . */
# define LOAD_SEG ( index , sreg ) do {} while ( 0 )
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# endif
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case 2 : LOAD_SEG ( 10 , R_CS ); return 4 ;
case 3 : LOAD_SEG ( 11 , R_SS ); return 4 ;
case 4 : LOAD_SEG ( 12 , R_DS ); return 4 ;
case 5 : LOAD_SEG ( 13 , R_ES ); return 4 ;
case 6 : LOAD_SEG ( 14 , R_FS ); return 4 ;
case 7 : LOAD_SEG ( 15 , R_GS ); return 4 ;
/* 8...15 x87 regs. */
case 16 : env -> fpuc = ldl_p ( mem_buf ); return 4 ;
case 17 :
tmp = ldl_p ( mem_buf );
env -> fpstt = ( tmp >> 11 ) & 7 ;
env -> fpus = tmp & ~ 0x3800 ;
return 4 ;
case 18 : /* ftag */ return 4 ;
case 19 : /* fiseg */ return 4 ;
case 20 : /* fioff */ return 4 ;
case 21 : /* foseg */ return 4 ;
case 22 : /* fooff */ return 4 ;
case 23 : /* fop */ return 4 ;
/* 24+ xmm regs. */
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}
}
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/* Unrecognised register. */
return 0 ;
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}
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# elif defined ( TARGET_PPC )
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/* Old gdb always expects FP registers . Newer ( xml - aware ) gdb only
expects whatever the target description contains . Due to a
historical mishap the FP registers appear in between core integer
regs and PC , MSR , CR , and so forth . We hack round this by giving the
FP regs zero size when talking to a newer gdb . */
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# define NUM_CORE_REGS 71
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# if defined ( TARGET_PPC64 )
# define GDB_CORE_XML "power64-core.xml"
# else
# define GDB_CORE_XML "power-core.xml"
# endif
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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 < 32 ) {
/* gprs */
GET_REGL ( env -> gpr [ n ]);
} else if ( n < 64 ) {
/* fprs */
646
647
if ( gdb_has_xml )
return 0 ;
648
stfq_p ( mem_buf , env -> fpr [ n - 32 ]);
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
return 8 ;
} else {
switch ( n ) {
case 64 : GET_REGL ( env -> nip );
case 65 : GET_REGL ( env -> msr );
case 66 :
{
uint32_t cr = 0 ;
int i ;
for ( i = 0 ; i < 8 ; i ++ )
cr |= env -> crf [ i ] << ( 32 - (( i + 1 ) * 4 ));
GET_REG32 ( cr );
}
case 67 : GET_REGL ( env -> lr );
case 68 : GET_REGL ( env -> ctr );
664
case 69 : GET_REGL ( env -> xer );
665
666
667
668
669
670
case 70 :
{
if ( gdb_has_xml )
return 0 ;
GET_REG32 ( 0 ); /* fpscr */
}
671
672
673
674
}
}
return 0 ;
}
675
676
677
678
679
680
681
682
683
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
{
if ( n < 32 ) {
/* gprs */
env -> gpr [ n ] = ldtul_p ( mem_buf );
return sizeof ( target_ulong );
} else if ( n < 64 ) {
/* fprs */
684
685
if ( gdb_has_xml )
return 0 ;
686
env -> fpr [ n - 32 ] = ldfq_p ( mem_buf );
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
return 8 ;
} else {
switch ( n ) {
case 64 :
env -> nip = ldtul_p ( mem_buf );
return sizeof ( target_ulong );
case 65 :
ppc_store_msr ( env , ldtul_p ( mem_buf ));
return sizeof ( target_ulong );
case 66 :
{
uint32_t cr = ldl_p ( mem_buf );
int i ;
for ( i = 0 ; i < 8 ; i ++ )
env -> crf [ i ] = ( cr >> ( 32 - (( i + 1 ) * 4 ))) & 0xF ;
return 4 ;
}
case 67 :
env -> lr = ldtul_p ( mem_buf );
return sizeof ( target_ulong );
case 68 :
env -> ctr = ldtul_p ( mem_buf );
return sizeof ( target_ulong );
case 69 :
711
712
env -> xer = ldtul_p ( mem_buf );
return sizeof ( target_ulong );
713
714
case 70 :
/* fpscr */
715
716
if ( gdb_has_xml )
return 0 ;
717
718
719
720
return 4 ;
}
}
return 0 ;
721
}
722
723
# elif defined ( TARGET_SPARC )
724
725
726
# if defined ( TARGET_SPARC64 ) && ! defined ( TARGET_ABI32 )
# define NUM_CORE_REGS 86
727
# else
728
# define NUM_CORE_REGS 72
729
# endif
730
731
# ifdef TARGET_ABI32
732
# define GET_REGA ( val ) GET_REG32 ( val )
733
# else
734
# define GET_REGA ( val ) GET_REGL ( val )
735
# endif
736
737
738
739
740
741
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
{
if ( n < 8 ) {
/* g0..g7 */
GET_REGA ( env -> gregs [ n ]);
742
}
743
744
745
if ( n < 32 ) {
/* register window */
GET_REGA ( env -> regwptr [ n - 8 ]);
746
}
747
748
749
750
# if defined ( TARGET_ABI32 ) || ! defined ( TARGET_SPARC64 )
if ( n < 64 ) {
/* fprs */
GET_REG32 ( * (( uint32_t * ) & env -> fpr [ n - 32 ]));
751
752
}
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
753
754
755
756
757
758
759
760
761
switch ( n ) {
case 64 : GET_REGA ( env -> y );
case 65 : GET_REGA ( GET_PSR ( env ));
case 66 : GET_REGA ( env -> wim );
case 67 : GET_REGA ( env -> tbr );
case 68 : GET_REGA ( env -> pc );
case 69 : GET_REGA ( env -> npc );
case 70 : GET_REGA ( env -> fsr );
case 71 : GET_REGA ( 0 ); /* csr */
762
default : GET_REGA ( 0 );
763
}
764
# else
765
766
767
768
769
770
771
if ( n < 64 ) {
/* f0-f31 */
GET_REG32 ( * (( uint32_t * ) & env -> fpr [ n - 32 ]));
}
if ( n < 80 ) {
/* f32-f62 (double width, even numbers only) */
uint64_t val ;
772
773
774
775
val = ( uint64_t ) * (( uint32_t * ) & env -> fpr [( n - 64 ) * 2 + 32 ]) << 32 ;
val |= * (( uint32_t * ) & env -> fpr [( n - 64 ) * 2 + 33 ]);
GET_REG64 ( val );
776
}
777
778
779
780
switch ( n ) {
case 80 : GET_REGL ( env -> pc );
case 81 : GET_REGL ( env -> npc );
case 82 : GET_REGL ((( uint64_t ) GET_CCR ( env ) << 32 ) |
781
782
783
(( env -> asi & 0xff ) << 24 ) |
(( env -> pstate & 0xfff ) << 8 ) |
GET_CWP64 ( env ));
784
785
786
787
case 83 : GET_REGL ( env -> fsr );
case 84 : GET_REGL ( env -> fprs );
case 85 : GET_REGL ( env -> y );
}
788
# endif
789
return 0 ;
790
791
}
792
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
793
{
794
795
796
797
# if defined ( TARGET_ABI32 )
abi_ulong tmp ;
tmp = ldl_p ( mem_buf );
798
# else
799
800
801
target_ulong tmp ;
tmp = ldtul_p ( mem_buf );
802
# endif
803
804
805
806
807
808
809
if ( n < 8 ) {
/* g0..g7 */
env -> gregs [ n ] = tmp ;
} else if ( n < 32 ) {
/* register window */
env -> regwptr [ n - 8 ] = tmp ;
810
}
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
# if defined ( TARGET_ABI32 ) || ! defined ( TARGET_SPARC64 )
else if ( n < 64 ) {
/* fprs */
* (( uint32_t * ) & env -> fpr [ n - 32 ]) = tmp ;
} else {
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
switch ( n ) {
case 64 : env -> y = tmp ; break ;
case 65 : PUT_PSR ( env , tmp ); break ;
case 66 : env -> wim = tmp ; break ;
case 67 : env -> tbr = tmp ; break ;
case 68 : env -> pc = tmp ; break ;
case 69 : env -> npc = tmp ; break ;
case 70 : env -> fsr = tmp ; break ;
default : return 0 ;
}
827
}
828
return 4 ;
829
# else
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
else if ( n < 64 ) {
/* f0-f31 */
env -> fpr [ n ] = ldfl_p ( mem_buf );
return 4 ;
} else if ( n < 80 ) {
/* f32-f62 (double width, even numbers only) */
* (( uint32_t * ) & env -> fpr [( n - 64 ) * 2 + 32 ]) = tmp >> 32 ;
* (( uint32_t * ) & env -> fpr [( n - 64 ) * 2 + 33 ]) = tmp ;
} else {
switch ( n ) {
case 80 : env -> pc = tmp ; break ;
case 81 : env -> npc = tmp ; break ;
case 82 :
PUT_CCR ( env , tmp >> 32 );
env -> asi = ( tmp >> 24 ) & 0xff ;
env -> pstate = ( tmp >> 8 ) & 0xfff ;
PUT_CWP64 ( env , tmp & 0xff );
break ;
case 83 : env -> fsr = tmp ; break ;
case 84 : env -> fprs = tmp ; break ;
case 85 : env -> y = tmp ; break ;
default : return 0 ;
}
853
}
854
return 8 ;
855
# endif
856
}
857
# elif defined ( TARGET_ARM )
858
859
860
861
862
863
864
865
/* Old gdb always expect FPA registers . Newer ( xml - aware ) gdb only expect
whatever the target description contains . Due to a historical mishap
the FPA registers appear in between core integer regs and the CPSR .
We hack round this by giving the FPA regs zero size when talking to a
newer gdb . */
# define NUM_CORE_REGS 26
# define GDB_CORE_XML "arm-core.xml"
866
867
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
868
{
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
if ( n < 16 ) {
/* Core integer register. */
GET_REG32 ( env -> regs [ n ]);
}
if ( n < 24 ) {
/* FPA registers. */
if ( gdb_has_xml )
return 0 ;
memset ( mem_buf , 0 , 12 );
return 12 ;
}
switch ( n ) {
case 24 :
/* FPA status register. */
if ( gdb_has_xml )
return 0 ;
GET_REG32 ( 0 );
case 25 :
/* CPSR */
GET_REG32 ( cpsr_read ( env ));
}
/* Unknown register. */
return 0 ;
892
}
893
894
895
896
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
{
uint32_t tmp ;
897
898
tmp = ldl_p ( mem_buf );
899
900
901
902
903
/* Mask out low bit of PC to workaround gdb bugs . This will probably
cause problems if we ever implement the Jazelle DBX extensions . */
if ( n == 15 )
tmp &= ~ 1 ;
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
if ( n < 16 ) {
/* Core integer register. */
env -> regs [ n ] = tmp ;
return 4 ;
}
if ( n < 24 ) { /* 16-23 */
/* FPA registers (ignored). */
if ( gdb_has_xml )
return 0 ;
return 12 ;
}
switch ( n ) {
case 24 :
/* FPA status register (ignored). */
if ( gdb_has_xml )
return 0 ;
return 4 ;
case 25 :
/* CPSR */
cpsr_write ( env , tmp , 0xffffffff );
return 4 ;
}
/* Unknown register. */
return 0 ;
}
930
931
# elif defined ( TARGET_M68K )
932
933
# define NUM_CORE_REGS 18
934
935
# define GDB_CORE_XML "cf-core.xml"
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
{
if ( n < 8 ) {
/* D0-D7 */
GET_REG32 ( env -> dregs [ n ]);
} else if ( n < 16 ) {
/* A0-A7 */
GET_REG32 ( env -> aregs [ n - 8 ]);
} else {
switch ( n ) {
case 16 : GET_REG32 ( env -> sr );
case 17 : GET_REG32 ( env -> pc );
}
}
/* FP registers not included here because they vary between
ColdFire and m68k . Use XML bits for these . */
return 0 ;
}
ths
authored
18 years ago
955
956
957
958
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
{
uint32_t tmp ;
ths
authored
18 years ago
959
960
tmp = ldl_p ( mem_buf );
ths
authored
18 years ago
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
if ( n < 8 ) {
/* D0-D7 */
env -> dregs [ n ] = tmp ;
} else if ( n < 8 ) {
/* A0-A7 */
env -> aregs [ n - 8 ] = tmp ;
} else {
switch ( n ) {
case 16 : env -> sr = tmp ; break ;
case 17 : env -> pc = tmp ; break ;
default : return 0 ;
}
}
return 4 ;
}
# elif defined ( TARGET_MIPS )
ths
authored
17 years ago
978
979
# define NUM_CORE_REGS 73
ths
authored
17 years ago
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
{
if ( n < 32 ) {
GET_REGL ( env -> active_tc . gpr [ n ]);
}
if ( env -> CP0_Config1 & ( 1 << CP0C1_FP )) {
if ( n >= 38 && n < 70 ) {
if ( env -> CP0_Status & ( 1 << CP0St_FR ))
GET_REGL ( env -> active_fpu . fpr [ n - 38 ]. d );
else
GET_REGL ( env -> active_fpu . fpr [ n - 38 ]. w [ FP_ENDIAN_IDX ]);
}
switch ( n ) {
case 70 : GET_REGL (( int32_t ) env -> active_fpu . fcr31 );
case 71 : GET_REGL (( int32_t ) env -> active_fpu . fcr0 );
}
}
switch ( n ) {
case 32 : GET_REGL (( int32_t ) env -> CP0_Status );
case 33 : GET_REGL ( env -> active_tc . LO [ 0 ]);
case 34 : GET_REGL ( env -> active_tc . HI [ 0 ]);
case 35 : GET_REGL ( env -> CP0_BadVAddr );
case 36 : GET_REGL (( int32_t ) env -> CP0_Cause );
case 37 : GET_REGL ( env -> active_tc . PC );
case 72 : GET_REGL ( 0 ); /* fp */
case 89 : GET_REGL (( int32_t ) env -> CP0_PRid );
}
if ( n >= 73 && n <= 88 ) {
/* 16 embedded regs. */
GET_REGL ( 0 );
}
1012
1013
return 0 ;
1014
1015
}
ths
authored
18 years ago
1016
1017
1018
1019
1020
1021
1022
1023
1024
/* convert MIPS rounding mode in FCR31 to IEEE library */
static unsigned int ieee_rm [] =
{
float_round_nearest_even ,
float_round_to_zero ,
float_round_up ,
float_round_down
};
# define RESTORE_ROUNDING_MODE \
ths
authored
17 years ago
1025
set_float_rounding_mode ( ieee_rm [ env -> active_fpu . fcr31 & 3 ], & env -> active_fpu . fp_status )
ths
authored
18 years ago
1026
1027
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
1028
{
1029
target_ulong tmp ;
1030
1031
tmp = ldtul_p ( mem_buf );
1032
1033
1034
1035
1036
1037
1038
1039
if ( n < 32 ) {
env -> active_tc . gpr [ n ] = tmp ;
return sizeof ( target_ulong );
}
if ( env -> CP0_Config1 & ( 1 << CP0C1_FP )
&& n >= 38 && n < 73 ) {
if ( n < 70 ) {
ths
authored
17 years ago
1040
if ( env -> CP0_Status & ( 1 << CP0St_FR ))
1041
env -> active_fpu . fpr [ n - 38 ]. d = tmp ;
ths
authored
17 years ago
1042
else
1043
1044
1045
1046
1047
1048
1049
env -> active_fpu . fpr [ n - 38 ]. w [ FP_ENDIAN_IDX ] = tmp ;
}
switch ( n ) {
case 70 :
env -> active_fpu . fcr31 = tmp & 0xFF83FFFF ;
/* set rounding mode */
RESTORE_ROUNDING_MODE ;
ths
authored
18 years ago
1050
# ifndef CONFIG_SOFTFLOAT
1051
1052
/* no floating point exception for native float */
SET_FP_ENABLE ( env -> active_fpu . fcr31 , 0 );
ths
authored
18 years ago
1053
# endif
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
break ;
case 71 : env -> active_fpu . fcr0 = tmp ; break ;
}
return sizeof ( target_ulong );
}
switch ( n ) {
case 32 : env -> CP0_Status = tmp ; break ;
case 33 : env -> active_tc . LO [ 0 ] = tmp ; break ;
case 34 : env -> active_tc . HI [ 0 ] = tmp ; break ;
case 35 : env -> CP0_BadVAddr = tmp ; break ;
case 36 : env -> CP0_Cause = tmp ; break ;
case 37 : env -> active_tc . PC = tmp ; break ;
case 72 : /* fp, ignored */ break ;
default :
if ( n > 89 )
return 0 ;
/* Other registers are readonly. Ignore writes. */
break ;
}
return sizeof ( target_ulong );
1075
}
1076
# elif defined ( TARGET_SH4 )
ths
authored
18 years ago
1077
1078
/* Hint: Use "set architecture sh4" in GDB to see fpu registers */
1079
1080
1081
/* FIXME: We should use XML for this. */
# define NUM_CORE_REGS 59
ths
authored
18 years ago
1082
1083
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
1084
{
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
if ( n < 8 ) {
if (( env -> sr & ( SR_MD | SR_RB )) == ( SR_MD | SR_RB )) {
GET_REGL ( env -> gregs [ n + 16 ]);
} else {
GET_REGL ( env -> gregs [ n ]);
}
} else if ( n < 16 ) {
GET_REGL ( env -> gregs [ n - 8 ]);
} else if ( n >= 25 && n < 41 ) {
GET_REGL ( env -> fregs [( n - 25 ) + (( env -> fpscr & FPSCR_FR ) ? 16 : 0 )]);
} else if ( n >= 43 && n < 51 ) {
GET_REGL ( env -> gregs [ n - 43 ]);
} else if ( n >= 51 && n < 59 ) {
GET_REGL ( env -> gregs [ n - ( 51 - 16 )]);
}
switch ( n ) {
case 16 : GET_REGL ( env -> pc );
case 17 : GET_REGL ( env -> pr );
case 18 : GET_REGL ( env -> gbr );
case 19 : GET_REGL ( env -> vbr );
case 20 : GET_REGL ( env -> mach );
case 21 : GET_REGL ( env -> macl );
case 22 : GET_REGL ( env -> sr );
case 23 : GET_REGL ( env -> fpul );
case 24 : GET_REGL ( env -> fpscr );
case 41 : GET_REGL ( env -> ssr );
case 42 : GET_REGL ( env -> spc );
}
return 0 ;
1115
1116
}
1117
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
1118
{
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
uint32_t tmp ;
tmp = ldl_p ( mem_buf );
if ( n < 8 ) {
if (( env -> sr & ( SR_MD | SR_RB )) == ( SR_MD | SR_RB )) {
env -> gregs [ n + 16 ] = tmp ;
} else {
env -> gregs [ n ] = tmp ;
}
return 4 ;
} else if ( n < 16 ) {
env -> gregs [ n - 8 ] = tmp ;
return 4 ;
} else if ( n >= 25 && n < 41 ) {
env -> fregs [( n - 25 ) + (( env -> fpscr & FPSCR_FR ) ? 16 : 0 )] = tmp ;
} else if ( n >= 43 && n < 51 ) {
env -> gregs [ n - 43 ] = tmp ;
return 4 ;
} else if ( n >= 51 && n < 59 ) {
env -> gregs [ n - ( 51 - 16 )] = tmp ;
return 4 ;
}
switch ( n ) {
case 16 : env -> pc = tmp ;
case 17 : env -> pr = tmp ;
case 18 : env -> gbr = tmp ;
case 19 : env -> vbr = tmp ;
case 20 : env -> mach = tmp ;
case 21 : env -> macl = tmp ;
case 22 : env -> sr = tmp ;
case 23 : env -> fpul = tmp ;
case 24 : env -> fpscr = tmp ;
case 41 : env -> ssr = tmp ;
case 42 : env -> spc = tmp ;
default : return 0 ;
}
return 4 ;
1158
}
ths
authored
17 years ago
1159
1160
# elif defined ( TARGET_CRIS )
1161
1162
1163
# define NUM_CORE_REGS 49
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
ths
authored
17 years ago
1164
{
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
uint8_t srs ;
srs = env -> pregs [ PR_SRS ];
if ( n < 16 ) {
GET_REG32 ( env -> regs [ n ]);
}
if ( n >= 21 && n < 32 ) {
GET_REG32 ( env -> pregs [ n - 16 ]);
}
if ( n >= 33 && n < 49 ) {
GET_REG32 ( env -> sregs [ srs ][ n - 33 ]);
}
switch ( n ) {
case 16 : GET_REG8 ( env -> pregs [ 0 ]);
case 17 : GET_REG8 ( env -> pregs [ 1 ]);
case 18 : GET_REG32 ( env -> pregs [ 2 ]);
case 19 : GET_REG8 ( srs );
case 20 : GET_REG16 ( env -> pregs [ 4 ]);
case 32 : GET_REG32 ( env -> pc );
}
return 0 ;
ths
authored
17 years ago
1188
}
1189
1190
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
ths
authored
17 years ago
1191
{
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
uint32_t tmp ;
if ( n > 49 )
return 0 ;
tmp = ldl_p ( mem_buf );
if ( n < 16 ) {
env -> regs [ n ] = tmp ;
}
1203
1204
1205
1206
1207
if ( n >= 21 && n < 32 ) {
env -> pregs [ n - 16 ] = tmp ;
}
/* FIXME: Should support function regs be writable? */
1208
1209
1210
switch ( n ) {
case 16 : return 1 ;
case 17 : return 1 ;
1211
case 18 : env -> pregs [ PR_PID ] = tmp ; break ;
1212
1213
1214
1215
1216
1217
case 19 : return 1 ;
case 20 : return 2 ;
case 32 : env -> pc = tmp ; break ;
}
return 4 ;
ths
authored
17 years ago
1218
}
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
# elif defined ( TARGET_ALPHA )
# define NUM_CORE_REGS 65
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
{
if ( n < 31 ) {
GET_REGL ( env -> ir [ n ]);
}
else if ( n == 31 ) {
GET_REGL ( 0 );
}
else if ( n < 63 ) {
uint64_t val ;
val =* (( uint64_t * ) & env -> fir [ n - 32 ]);
GET_REGL ( val );
}
else if ( n == 63 ) {
GET_REGL ( env -> fpcr );
}
else if ( n == 64 ) {
GET_REGL ( env -> pc );
}
else {
GET_REGL ( 0 );
}
return 0 ;
}
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
{
target_ulong tmp ;
tmp = ldtul_p ( mem_buf );
if ( n < 31 ) {
env -> ir [ n ] = tmp ;
}
if ( n > 31 && n < 63 ) {
env -> fir [ n - 32 ] = ldfl_p ( mem_buf );
}
if ( n == 64 ) {
env -> pc = tmp ;
}
return 8 ;
}
1269
1270
1271
1272
1273
# else
# define NUM_CORE_REGS 0
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
ths
authored
17 years ago
1274
{
1275
return 0 ;
ths
authored
17 years ago
1276
1277
}
1278
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
ths
authored
17 years ago
1279
{
1280
1281
return 0 ;
}
ths
authored
17 years ago
1282
1283
# endif
ths
authored
17 years ago
1284
1285
static int num_g_regs = NUM_CORE_REGS ;
ths
authored
17 years ago
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
# ifdef GDB_CORE_XML
/* Encode data using the encoding for 'x' packets. */
static int memtox ( char * buf , const char * mem , int len )
{
char * p = buf ;
char c ;
while ( len -- ) {
c = * ( mem ++ );
switch ( c ) {
case '#' : case '$' : case '*' : case '}' :
* ( p ++ ) = '}' ;
* ( p ++ ) = c ^ 0x20 ;
break ;
default :
* ( p ++ ) = c ;
break ;
}
}
return p - buf ;
}
ths
authored
17 years ago
1308
1309
static const char * get_feature_xml ( const char * p , const char ** newp )
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
{
extern const char * const xml_builtin [][ 2 ];
size_t len ;
int i ;
const char * name ;
static char target_xml [ 1024 ];
len = 0 ;
while ( p [ len ] && p [ len ] != ':' )
len ++ ;
* newp = p + len ;
name = NULL ;
if ( strncmp ( p , "target.xml" , len ) == 0 ) {
/* Generate the XML description for this CPU. */
if ( ! target_xml [ 0 ]) {
GDBRegisterState * r ;
1328
1329
1330
1331
1332
1333
snprintf ( target_xml , sizeof ( target_xml ),
"<?xml version= \" 1.0 \" ?>"
"<!DOCTYPE target SYSTEM \" gdb-target.dtd \" >"
"<target>"
"<xi:include href= \" %s \" />" ,
GDB_CORE_XML );
1334
1335
for ( r = first_cpu -> gdb_regs ; r ; r = r -> next ) {
1336
1337
1338
pstrcat ( target_xml , sizeof ( target_xml ), "<xi:include href= \" " );
pstrcat ( target_xml , sizeof ( target_xml ), r -> xml );
pstrcat ( target_xml , sizeof ( target_xml ), " \" />" );
1339
}
1340
pstrcat ( target_xml , sizeof ( target_xml ), "</target>" );
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
}
return target_xml ;
}
for ( i = 0 ; ; i ++ ) {
name = xml_builtin [ i ][ 0 ];
if ( ! name || ( strncmp ( name , p , len ) == 0 && strlen ( name ) == len ))
break ;
}
return name ? xml_builtin [ i ][ 1 ] : NULL ;
}
# endif
ths
authored
17 years ago
1352
1353
1354
1355
static int gdb_read_register ( CPUState * env , uint8_t * mem_buf , int reg )
{
GDBRegisterState * r ;
ths
authored
17 years ago
1356
1357
1358
if ( reg < NUM_CORE_REGS )
return cpu_gdb_read_register ( env , mem_buf , reg );
ths
authored
17 years ago
1359
1360
1361
1362
1363
1364
1365
for ( r = env -> gdb_regs ; r ; r = r -> next ) {
if ( r -> base_reg <= reg && reg < r -> base_reg + r -> num_regs ) {
return r -> get_reg ( env , mem_buf , reg - r -> base_reg );
}
}
return 0 ;
ths
authored
17 years ago
1366
1367
}
1368
static int gdb_write_register ( CPUState * env , uint8_t * mem_buf , int reg )
ths
authored
17 years ago
1369
{
1370
GDBRegisterState * r ;
ths
authored
17 years ago
1371
1372
1373
1374
1375
1376
1377
1378
1379
if ( reg < NUM_CORE_REGS )
return cpu_gdb_write_register ( env , mem_buf , reg );
for ( r = env -> gdb_regs ; r ; r = r -> next ) {
if ( r -> base_reg <= reg && reg < r -> base_reg + r -> num_regs ) {
return r -> set_reg ( env , mem_buf , reg - r -> base_reg );
}
}
1380
1381
1382
return 0 ;
}
1383
1384
1385
1386
1387
1388
1389
1390
1391
/* Register a supplemental set of CPU registers . If g_pos is nonzero it
specifies the first register number and these registers are included in
a standard "g" packet . Direction is relative to gdb , i . e . get_reg is
gdb reading a CPU register , and set_reg is gdb modifying a CPU register .
*/
void gdb_register_coprocessor ( CPUState * env ,
gdb_reg_cb get_reg , gdb_reg_cb set_reg ,
int num_regs , const char * xml , int g_pos )
1392
{
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
GDBRegisterState * s ;
GDBRegisterState ** p ;
static int last_reg = NUM_CORE_REGS ;
s = ( GDBRegisterState * ) qemu_mallocz ( sizeof ( GDBRegisterState ));
s -> base_reg = last_reg ;
s -> num_regs = num_regs ;
s -> get_reg = get_reg ;
s -> set_reg = set_reg ;
s -> xml = xml ;
p = & env -> gdb_regs ;
while ( * p ) {
/* Check for duplicates. */
if ( strcmp (( * p ) -> xml , xml ) == 0 )
return ;
p = & ( * p ) -> next ;
}
/* Add to end of list. */
last_reg += num_regs ;
* p = s ;
if ( g_pos ) {
if ( g_pos != s -> base_reg ) {
fprintf ( stderr , "Error: Bad gdb register numbering for '%s' \n "
"Expected %d got %d \n " , xml , g_pos , s -> base_reg );
} else {
num_g_regs = last_reg ;
}
}
1421
1422
}
1423
1424
1425
1426
1427
1428
1429
1430
# ifndef CONFIG_USER_ONLY
static const int xlat_gdb_type [] = {
[ GDB_WATCHPOINT_WRITE ] = BP_GDB | BP_MEM_WRITE ,
[ GDB_WATCHPOINT_READ ] = BP_GDB | BP_MEM_READ ,
[ GDB_WATCHPOINT_ACCESS ] = BP_GDB | BP_MEM_ACCESS ,
};
# endif
1431
static int gdb_breakpoint_insert ( target_ulong addr , target_ulong len , int type )
1432
{
1433
1434
1435
CPUState * env ;
int err = 0 ;
1436
1437
1438
if ( kvm_enabled ())
return kvm_insert_breakpoint ( gdbserver_state -> c_cpu , addr , len , type );
1439
1440
1441
switch ( type ) {
case GDB_BREAKPOINT_SW :
case GDB_BREAKPOINT_HW :
1442
1443
1444
1445
1446
1447
for ( env = first_cpu ; env != NULL ; env = env -> next_cpu ) {
err = cpu_breakpoint_insert ( env , addr , BP_GDB , NULL );
if ( err )
break ;
}
return err ;
1448
1449
1450
1451
# ifndef CONFIG_USER_ONLY
case GDB_WATCHPOINT_WRITE :
case GDB_WATCHPOINT_READ :
case GDB_WATCHPOINT_ACCESS :
1452
1453
1454
1455
1456
1457
1458
for ( env = first_cpu ; env != NULL ; env = env -> next_cpu ) {
err = cpu_watchpoint_insert ( env , addr , len , xlat_gdb_type [ type ],
NULL );
if ( err )
break ;
}
return err ;
1459
1460
1461
1462
1463
1464
# endif
default :
return - ENOSYS ;
}
}
1465
static int gdb_breakpoint_remove ( target_ulong addr , target_ulong len , int type )
1466
{
1467
1468
1469
CPUState * env ;
int err = 0 ;
1470
1471
1472
if ( kvm_enabled ())
return kvm_remove_breakpoint ( gdbserver_state -> c_cpu , addr , len , type );
1473
1474
1475
switch ( type ) {
case GDB_BREAKPOINT_SW :
case GDB_BREAKPOINT_HW :
1476
1477
1478
1479
1480
1481
for ( env = first_cpu ; env != NULL ; env = env -> next_cpu ) {
err = cpu_breakpoint_remove ( env , addr , BP_GDB );
if ( err )
break ;
}
return err ;
1482
1483
1484
1485
# ifndef CONFIG_USER_ONLY
case GDB_WATCHPOINT_WRITE :
case GDB_WATCHPOINT_READ :
case GDB_WATCHPOINT_ACCESS :
1486
1487
1488
1489
1490
1491
for ( env = first_cpu ; env != NULL ; env = env -> next_cpu ) {
err = cpu_watchpoint_remove ( env , addr , len , xlat_gdb_type [ type ]);
if ( err )
break ;
}
return err ;
1492
1493
1494
1495
1496
1497
# endif
default :
return - ENOSYS ;
}
}
1498
static void gdb_breakpoint_remove_all ( void )
1499
{
1500
1501
CPUState * env ;
1502
1503
1504
1505
1506
if ( kvm_enabled ()) {
kvm_remove_all_breakpoints ( gdbserver_state -> c_cpu );
return ;
}
1507
1508
for ( env = first_cpu ; env != NULL ; env = env -> next_cpu ) {
cpu_breakpoint_remove_all ( env , BP_GDB );
1509
# ifndef CONFIG_USER_ONLY
1510
cpu_watchpoint_remove_all ( env , BP_GDB );
1511
# endif
1512
}
1513
1514
}
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
static void gdb_set_cpu_pc ( GDBState * s , target_ulong pc )
{
# if defined ( TARGET_I386 )
s -> c_cpu -> eip = pc ;
cpu_synchronize_state ( s -> c_cpu , 1 );
# elif defined ( TARGET_PPC )
s -> c_cpu -> nip = pc ;
# elif defined ( TARGET_SPARC )
s -> c_cpu -> pc = pc ;
s -> c_cpu -> npc = pc + 4 ;
# elif defined ( TARGET_ARM )
s -> c_cpu -> regs [ 15 ] = pc ;
# elif defined ( TARGET_SH4 )
s -> c_cpu -> pc = pc ;
# elif defined ( TARGET_MIPS )
s -> c_cpu -> active_tc . PC = pc ;
# elif defined ( TARGET_CRIS )
s -> c_cpu -> pc = pc ;
# elif defined ( TARGET_ALPHA )
s -> c_cpu -> pc = pc ;
# endif
}
1538
static int gdb_handle_packet ( GDBState * s , const char * line_buf )
1539
{
1540
CPUState * env ;
1541
const char * p ;
1542
int ch , reg_size , type , res , thread ;
1543
1544
1545
char buf [ MAX_PACKET_LENGTH ];
uint8_t mem_buf [ MAX_PACKET_LENGTH ];
uint8_t * registers ;
1546
target_ulong addr , len ;
ths
authored
18 years ago
1547
1548
1549
1550
1551
1552
1553
1554
# ifdef DEBUG_GDB
printf ( "command='%s' \n " , line_buf );
# endif
p = line_buf ;
ch = * p ++ ;
switch ( ch ) {
case '?' :
1555
/* TODO: Make this return the correct value for user-mode. */
1556
snprintf ( buf , sizeof ( buf ), "T%02xthread:%02x;" , GDB_SIGNAL_TRAP ,
1557
s -> c_cpu -> cpu_index + 1 );
1558
put_packet ( s , buf );
1559
1560
1561
1562
/* Remove all the breakpoints when this query is issued ,
* because gdb is doing and initial connect and the state
* should be cleaned up .
*/
1563
gdb_breakpoint_remove_all ();
1564
1565
1566
break ;
case 'c' :
if ( * p != '\0' ) {
1567
addr = strtoull ( p , ( char ** ) & p , 16 );
1568
gdb_set_cpu_pc ( s , addr );
1569
}
1570
s -> signal = 0 ;
1571
gdb_continue ( s );
1572
return RS_IDLE ;
1573
case 'C' :
1574
1575
1576
s -> signal = gdb_signal_to_target ( strtoul ( p , ( char ** ) & p , 16 ));
if ( s -> signal == - 1 )
s -> signal = 0 ;
1577
1578
gdb_continue ( s );
return RS_IDLE ;
1579
1580
1581
1582
1583
1584
case 'k' :
/* Kill the target */
fprintf ( stderr , " \n QEMU: Terminated via GDBstub \n " );
exit ( 0 );
case 'D' :
/* Detach packet */
1585
gdb_breakpoint_remove_all ();
1586
1587
1588
gdb_continue ( s );
put_packet ( s , "OK" );
break ;
1589
1590
case 's' :
if ( * p != '\0' ) {
ths
authored
18 years ago
1591
addr = strtoull ( p , ( char ** ) & p , 16 );
1592
gdb_set_cpu_pc ( s , addr );
1593
}
1594
cpu_single_step ( s -> c_cpu , sstep_flags );
1595
gdb_continue ( s );
1596
return RS_IDLE ;
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
case 'F' :
{
target_ulong ret ;
target_ulong err ;
ret = strtoull ( p , ( char ** ) & p , 16 );
if ( * p == ',' ) {
p ++ ;
err = strtoull ( p , ( char ** ) & p , 16 );
} else {
err = 0 ;
}
if ( * p == ',' )
p ++ ;
type = * p ;
if ( gdb_current_syscall_cb )
1613
gdb_current_syscall_cb ( s -> c_cpu , ret , err );
1614
1615
1616
if ( type == 'C' ) {
put_packet ( s , "T02" );
} else {
1617
gdb_continue ( s );
1618
1619
1620
}
}
break ;
1621
case 'g' :
1622
cpu_synchronize_state ( s -> g_cpu , 0 );
1623
1624
len = 0 ;
for ( addr = 0 ; addr < num_g_regs ; addr ++ ) {
1625
reg_size = gdb_read_register ( s -> g_cpu , mem_buf + len , addr );
1626
1627
1628
len += reg_size ;
}
memtohex ( buf , mem_buf , len );
1629
1630
1631
put_packet ( s , buf );
break ;
case 'G' :
1632
registers = mem_buf ;
1633
1634
len = strlen ( p ) / 2 ;
hextomem (( uint8_t * ) registers , p , len );
1635
for ( addr = 0 ; addr < num_g_regs && len > 0 ; addr ++ ) {
1636
reg_size = gdb_write_register ( s -> g_cpu , registers , addr );
1637
1638
1639
len -= reg_size ;
registers += reg_size ;
}
1640
cpu_synchronize_state ( s -> g_cpu , 1 );
1641
1642
1643
put_packet ( s , "OK" );
break ;
case 'm' :
1644
addr = strtoull ( p , ( char ** ) & p , 16 );
1645
1646
if ( * p == ',' )
p ++ ;
1647
len = strtoull ( p , NULL , 16 );
1648
if ( cpu_memory_rw_debug ( s -> g_cpu , addr , mem_buf , len , 0 ) != 0 ) {
1649
1650
1651
1652
1653
put_packet ( s , "E14" );
} else {
memtohex ( buf , mem_buf , len );
put_packet ( s , buf );
}
1654
1655
break ;
case 'M' :
1656
addr = strtoull ( p , ( char ** ) & p , 16 );
1657
1658
if ( * p == ',' )
p ++ ;
1659
len = strtoull ( p , ( char ** ) & p , 16 );
1660
if ( * p == ':' )
1661
1662
p ++ ;
hextomem ( mem_buf , p , len );
1663
if ( cpu_memory_rw_debug ( s -> g_cpu , addr , mem_buf , len , 1 ) != 0 )
1664
put_packet ( s , "E14" );
1665
1666
1667
else
put_packet ( s , "OK" );
break ;
1668
1669
1670
1671
1672
1673
1674
case 'p' :
/* Older gdb are really dumb , and don ' t use 'g' if 'p' is avaialable .
This works , but can be very slow . Anything new enough to
understand XML also knows how to use this properly . */
if ( ! gdb_has_xml )
goto unknown_command ;
addr = strtoull ( p , ( char ** ) & p , 16 );
1675
reg_size = gdb_read_register ( s -> g_cpu , mem_buf , addr );
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
if ( reg_size ) {
memtohex ( buf , mem_buf , reg_size );
put_packet ( s , buf );
} else {
put_packet ( s , "E14" );
}
break ;
case 'P' :
if ( ! gdb_has_xml )
goto unknown_command ;
addr = strtoull ( p , ( char ** ) & p , 16 );
if ( * p == '=' )
p ++ ;
reg_size = strlen ( p ) / 2 ;
hextomem ( mem_buf , p , reg_size );
1691
gdb_write_register ( s -> g_cpu , mem_buf , addr );
1692
1693
put_packet ( s , "OK" );
break ;
1694
1695
1696
1697
1698
case 'Z' :
case 'z' :
type = strtoul ( p , ( char ** ) & p , 16 );
if ( * p == ',' )
p ++ ;
1699
addr = strtoull ( p , ( char ** ) & p , 16 );
1700
1701
if ( * p == ',' )
p ++ ;
1702
len = strtoull ( p , ( char ** ) & p , 16 );
1703
if ( ch == 'Z' )
1704
res = gdb_breakpoint_insert ( addr , len , type );
1705
else
1706
res = gdb_breakpoint_remove ( addr , len , type );
1707
1708
1709
if ( res >= 0 )
put_packet ( s , "OK" );
else if ( res == - ENOSYS )
1710
put_packet ( s , "" );
1711
1712
else
put_packet ( s , "E22" );
1713
break ;
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
case 'H' :
type = * p ++ ;
thread = strtoull ( p , ( char ** ) & p , 16 );
if ( thread == - 1 || thread == 0 ) {
put_packet ( s , "OK" );
break ;
}
for ( env = first_cpu ; env != NULL ; env = env -> next_cpu )
if ( env -> cpu_index + 1 == thread )
break ;
if ( env == NULL ) {
put_packet ( s , "E22" );
break ;
}
switch ( type ) {
case 'c' :
s -> c_cpu = env ;
put_packet ( s , "OK" );
break ;
case 'g' :
s -> g_cpu = env ;
put_packet ( s , "OK" );
break ;
default :
put_packet ( s , "E22" );
break ;
}
break ;
case 'T' :
thread = strtoull ( p , ( char ** ) & p , 16 );
# ifndef CONFIG_USER_ONLY
if ( thread > 0 && thread < smp_cpus + 1 )
# else
if ( thread == 1 )
# endif
put_packet ( s , "OK" );
else
put_packet ( s , "E22" );
break ;
1753
case 'q' :
1754
1755
1756
1757
case 'Q' :
/* parse any 'q' packets here */
if ( ! strcmp ( p , "qemu.sstepbits" )) {
/* Query Breakpoint bit definitions */
1758
1759
1760
1761
snprintf ( buf , sizeof ( buf ), "ENABLE=%x,NOIRQ=%x,NOTIMER=%x" ,
SSTEP_ENABLE ,
SSTEP_NOIRQ ,
SSTEP_NOTIMER );
1762
1763
1764
1765
1766
1767
1768
put_packet ( s , buf );
break ;
} else if ( strncmp ( p , "qemu.sstep" , 10 ) == 0 ) {
/* Display or change the sstep_flags */
p += 10 ;
if ( * p != '=' ) {
/* Display current setting */
1769
snprintf ( buf , sizeof ( buf ), "0x%x" , sstep_flags );
1770
1771
1772
1773
1774
1775
1776
1777
put_packet ( s , buf );
break ;
}
p ++ ;
type = strtoul ( p , ( char ** ) & p , 16 );
sstep_flags = type ;
put_packet ( s , "OK" );
break ;
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
} else if ( strcmp ( p , "C" ) == 0 ) {
/* "Current thread" remains vague in the spec , so always return
* the first CPU ( gdb returns the first thread ). */
put_packet ( s , "QC1" );
break ;
} else if ( strcmp ( p , "fThreadInfo" ) == 0 ) {
s -> query_cpu = first_cpu ;
goto report_cpuinfo ;
} else if ( strcmp ( p , "sThreadInfo" ) == 0 ) {
report_cpuinfo :
if ( s -> query_cpu ) {
snprintf ( buf , sizeof ( buf ), "m%x" , s -> query_cpu -> cpu_index + 1 );
put_packet ( s , buf );
s -> query_cpu = s -> query_cpu -> next_cpu ;
} else
put_packet ( s , "l" );
break ;
} else if ( strncmp ( p , "ThreadExtraInfo," , 16 ) == 0 ) {
thread = strtoull ( p + 16 , ( char ** ) & p , 16 );
for ( env = first_cpu ; env != NULL ; env = env -> next_cpu )
if ( env -> cpu_index + 1 == thread ) {
1799
cpu_synchronize_state ( env , 0 );
1800
1801
1802
1803
1804
1805
1806
1807
len = snprintf (( char * ) mem_buf , sizeof ( mem_buf ),
"CPU#%d [%s]" , env -> cpu_index ,
env -> halted ? "halted " : "running" );
memtohex ( buf , mem_buf , len );
put_packet ( s , buf );
break ;
}
break ;
1808
}
1809
# ifdef CONFIG_USER_ONLY
1810
else if ( strncmp ( p , "Offsets" , 7 ) == 0 ) {
1811
TaskState * ts = s -> c_cpu -> opaque ;
1812
1813
1814
1815
1816
1817
1818
snprintf ( buf , sizeof ( buf ),
"Text=" TARGET_ABI_FMT_lx ";Data=" TARGET_ABI_FMT_lx
";Bss=" TARGET_ABI_FMT_lx ,
ts -> info -> code_offset ,
ts -> info -> data_offset ,
ts -> info -> data_offset );
1819
1820
1821
put_packet ( s , buf );
break ;
}
1822
# else /* !CONFIG_USER_ONLY */
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
else if ( strncmp ( p , "Rcmd," , 5 ) == 0 ) {
int len = strlen ( p + 5 );
if (( len % 2 ) != 0 ) {
put_packet ( s , "E01" );
break ;
}
hextomem ( mem_buf , p + 5 , len );
len = len / 2 ;
mem_buf [ len ++ ] = 0 ;
qemu_chr_read ( s -> mon_chr , mem_buf , len );
put_packet ( s , "OK" );
break ;
}
1837
# endif /* !CONFIG_USER_ONLY */
1838
if ( strncmp ( p , "Supported" , 9 ) == 0 ) {
1839
snprintf ( buf , sizeof ( buf ), "PacketSize=%x" , MAX_PACKET_LENGTH );
1840
# ifdef GDB_CORE_XML
1841
pstrcat ( buf , sizeof ( buf ), ";qXfer:features:read+" );
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
# endif
put_packet ( s , buf );
break ;
}
# ifdef GDB_CORE_XML
if ( strncmp ( p , "Xfer:features:read:" , 19 ) == 0 ) {
const char * xml ;
target_ulong total_len ;
gdb_has_xml = 1 ;
p += 19 ;
1853
xml = get_feature_xml ( p , & p );
1854
if ( ! xml ) {
1855
snprintf ( buf , sizeof ( buf ), "E00" );
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
put_packet ( s , buf );
break ;
}
if ( * p == ':' )
p ++ ;
addr = strtoul ( p , ( char ** ) & p , 16 );
if ( * p == ',' )
p ++ ;
len = strtoul ( p , ( char ** ) & p , 16 );
total_len = strlen ( xml );
if ( addr > total_len ) {
1869
snprintf ( buf , sizeof ( buf ), "E00" );
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
put_packet ( s , buf );
break ;
}
if ( len > ( MAX_PACKET_LENGTH - 5 ) / 2 )
len = ( MAX_PACKET_LENGTH - 5 ) / 2 ;
if ( len < total_len - addr ) {
buf [ 0 ] = 'm' ;
len = memtox ( buf + 1 , xml + addr , len );
} else {
buf [ 0 ] = 'l' ;
len = memtox ( buf + 1 , xml + addr , total_len - addr );
}
put_packet_binary ( s , buf , len + 1 );
break ;
}
# endif
/* Unrecognised 'q' command. */
goto unknown_command ;
1889
default :
1890
unknown_command :
1891
1892
1893
1894
1895
1896
1897
1898
/* put empty packet */
buf [ 0 ] = '\0' ;
put_packet ( s , buf );
break ;
}
return RS_IDLE ;
}
1899
1900
1901
1902
1903
1904
void gdb_set_stop_cpu ( CPUState * env )
{
gdbserver_state -> c_cpu = env ;
gdbserver_state -> g_cpu = env ;
}
1905
# ifndef CONFIG_USER_ONLY
1906
static void gdb_vm_state_change ( void * opaque , int running , int reason )
1907
{
1908
1909
GDBState * s = gdbserver_state ;
CPUState * env = s -> c_cpu ;
1910
char buf [ 256 ];
1911
const char * type ;
1912
1913
int ret ;
1914
if ( running || ( reason != EXCP_DEBUG && reason != EXCP_INTERRUPT ) ||
1915
s -> state == RS_INACTIVE || s -> state == RS_SYSCALL )
1916
1917
return ;
1918
/* disable single step if it was enable */
1919
cpu_single_step ( env , 0 );
1920
1921
if ( reason == EXCP_DEBUG ) {
1922
1923
if ( env -> watchpoint_hit ) {
switch ( env -> watchpoint_hit -> flags & BP_MEM_ACCESS ) {
1924
case BP_MEM_READ :
1925
1926
type = "r" ;
break ;
1927
case BP_MEM_ACCESS :
1928
1929
1930
1931
1932
1933
type = "a" ;
break ;
default :
type = "" ;
break ;
}
1934
1935
snprintf ( buf , sizeof ( buf ),
"T%02xthread:%02x;%swatch:" TARGET_FMT_lx ";" ,
1936
GDB_SIGNAL_TRAP , env -> cpu_index + 1 , type ,
1937
env -> watchpoint_hit -> vaddr );
1938
put_packet ( s , buf );
1939
env -> watchpoint_hit = NULL ;
1940
1941
return ;
}
1942
tb_flush ( env );
1943
ret = GDB_SIGNAL_TRAP ;
1944
} else {
1945
ret = GDB_SIGNAL_INT ;
1946
}
1947
snprintf ( buf , sizeof ( buf ), "T%02xthread:%02x;" , ret , env -> cpu_index + 1 );
1948
1949
put_packet ( s , buf );
}
1950
# endif
1951
1952
1953
/* Send a gdb syscall request .
This accepts limited printf - style format specifiers , specifically :
1954
1955
1956
% x - target_ulong argument printed in hex .
% lx - 64 - bit argument printed in hex .
% s - string pointer ( target_ulong ) and length ( int ) pair . */
1957
void gdb_do_syscall ( gdb_syscall_complete_cb cb , const char * fmt , ...)
1958
1959
1960
1961
1962
{
va_list va ;
char buf [ 256 ];
char * p ;
target_ulong addr ;
1963
uint64_t i64 ;
1964
1965
GDBState * s ;
1966
s = gdbserver_state ;
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
if ( ! s )
return ;
gdb_current_syscall_cb = cb ;
s -> state = RS_SYSCALL ;
# ifndef CONFIG_USER_ONLY
vm_stop ( EXCP_DEBUG );
# endif
s -> state = RS_IDLE ;
va_start ( va , fmt );
p = buf ;
* ( p ++ ) = 'F' ;
while ( * fmt ) {
if ( * fmt == '%' ) {
fmt ++ ;
switch ( * fmt ++ ) {
case 'x' :
addr = va_arg ( va , target_ulong );
1984
p += snprintf ( p , & buf [ sizeof ( buf )] - p , TARGET_FMT_lx , addr );
1985
break ;
1986
1987
1988
1989
case 'l' :
if ( * ( fmt ++ ) != 'x' )
goto bad_format ;
i64 = va_arg ( va , uint64_t );
1990
p += snprintf ( p , & buf [ sizeof ( buf )] - p , "%" PRIx64 , i64 );
1991
break ;
1992
1993
case 's' :
addr = va_arg ( va , target_ulong );
1994
1995
p += snprintf ( p , & buf [ sizeof ( buf )] - p , TARGET_FMT_lx "/%x" ,
addr , va_arg ( va , int ));
1996
1997
break ;
default :
1998
bad_format :
1999
2000
2001
2002
2003
2004
2005
2006
fprintf ( stderr , "gdbstub: Bad syscall format string '%s' \n " ,
fmt - 1 );
break ;
}
} else {
* ( p ++ ) = * ( fmt ++ );
}
}
2007
* p = 0 ;
2008
2009
2010
va_end ( va );
put_packet ( s , buf );
# ifdef CONFIG_USER_ONLY
2011
gdb_handlesig ( s -> c_cpu , 0 );
2012
# else
2013
cpu_exit ( s -> c_cpu );
2014
2015
2016
# endif
}
2017
static void gdb_read_byte ( GDBState * s , int ch )
2018
2019
{
int i , csum ;
ths
authored
17 years ago
2020
uint8_t reply ;
2021
2022
# ifndef CONFIG_USER_ONLY
2023
2024
2025
2026
2027
2028
2029
if ( s -> last_packet_len ) {
/* Waiting for a response to the last packet . If we see the start
of a new command then abandon the previous response . */
if ( ch == '-' ) {
# ifdef DEBUG_GDB
printf ( "Got NACK, retransmitting \n " );
# endif
ths
authored
17 years ago
2030
put_buffer ( s , ( uint8_t * ) s -> last_packet , s -> last_packet_len );
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
}
# ifdef DEBUG_GDB
else if ( ch == '+' )
printf ( "Got ACK \n " );
else
printf ( "Got '%c' when expecting ACK/NACK \n " , ch );
# endif
if ( ch == '+' || ch == '$' )
s -> last_packet_len = 0 ;
if ( ch != '$' )
return ;
}
2043
2044
2045
2046
if ( vm_running ) {
/* when the CPU is running , we cannot do anything except stop
it when receiving a char */
vm_stop ( EXCP_INTERRUPT );
ths
authored
18 years ago
2047
} else
2048
# endif
2049
{
2050
2051
2052
2053
2054
switch ( s -> state ) {
case RS_IDLE :
if ( ch == '$' ) {
s -> line_buf_index = 0 ;
s -> state = RS_GETLINE ;
2055
}
2056
break ;
2057
2058
2059
2060
2061
case RS_GETLINE :
if ( ch == '#' ) {
s -> state = RS_CHKSUM1 ;
} else if ( s -> line_buf_index >= sizeof ( s -> line_buf ) - 1 ) {
s -> state = RS_IDLE ;
2062
} else {
2063
s -> line_buf [ s -> line_buf_index ++ ] = ch ;
2064
2065
}
break ;
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
case RS_CHKSUM1 :
s -> line_buf [ s -> line_buf_index ] = '\0' ;
s -> line_csum = fromhex ( ch ) << 4 ;
s -> state = RS_CHKSUM2 ;
break ;
case RS_CHKSUM2 :
s -> line_csum |= fromhex ( ch );
csum = 0 ;
for ( i = 0 ; i < s -> line_buf_index ; i ++ ) {
csum += s -> line_buf [ i ];
}
if ( s -> line_csum != ( csum & 0xff )) {
ths
authored
17 years ago
2078
2079
reply = '-' ;
put_buffer ( s , & reply , 1 );
2080
s -> state = RS_IDLE ;
2081
} else {
ths
authored
17 years ago
2082
2083
reply = '+' ;
put_buffer ( s , & reply , 1 );
2084
s -> state = gdb_handle_packet ( s , s -> line_buf );
2085
2086
}
break ;
2087
2088
default :
abort ();
2089
2090
2091
2092
}
}
}
2093
2094
# ifdef CONFIG_USER_ONLY
int
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
gdb_queuesig ( void )
{
GDBState * s ;
s = gdbserver_state ;
if ( gdbserver_fd < 0 || s -> fd < 0 )
return 0 ;
else
return 1 ;
}
int
2108
2109
2110
2111
2112
2113
gdb_handlesig ( CPUState * env , int sig )
{
GDBState * s ;
char buf [ 256 ];
int n ;
2114
s = gdbserver_state ;
2115
2116
if ( gdbserver_fd < 0 || s -> fd < 0 )
return sig ;
2117
2118
2119
2120
2121
2122
2123
/* disable single step if it was enabled */
cpu_single_step ( env , 0 );
tb_flush ( env );
if ( sig != 0 )
{
2124
snprintf ( buf , sizeof ( buf ), "S%02x" , target_signal_to_gdb ( sig ));
2125
2126
put_packet ( s , buf );
}
2127
2128
2129
2130
/* put_packet () might have detected that the peer terminated the
connection . */
if ( s -> fd < 0 )
return sig ;
2131
2132
2133
sig = 0 ;
s -> state = RS_IDLE ;
2134
2135
s -> running_state = 0 ;
while ( s -> running_state == 0 ) {
2136
2137
2138
2139
2140
2141
n = read ( s -> fd , buf , 256 );
if ( n > 0 )
{
int i ;
for ( i = 0 ; i < n ; i ++ )
2142
gdb_read_byte ( s , buf [ i ]);
2143
2144
2145
2146
2147
2148
2149
}
else if ( n == 0 || errno != EAGAIN )
{
/* XXX : Connection closed . Should probably wait for annother
connection before continuing . */
return sig ;
}
2150
}
2151
2152
sig = s -> signal ;
s -> signal = 0 ;
2153
2154
return sig ;
}
2155
2156
2157
2158
2159
2160
2161
/* Tell the remote gdb that the process has exited. */
void gdb_exit ( CPUState * env , int code )
{
GDBState * s ;
char buf [ 4 ];
2162
s = gdbserver_state ;
2163
2164
if ( gdbserver_fd < 0 || s -> fd < 0 )
return ;
2165
2166
2167
2168
2169
snprintf ( buf , sizeof ( buf ), "W%02x" , code );
put_packet ( s , buf );
}
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
/* Tell the remote gdb that the process has exited due to SIG. */
void gdb_signalled ( CPUState * env , int sig )
{
GDBState * s ;
char buf [ 4 ];
s = gdbserver_state ;
if ( gdbserver_fd < 0 || s -> fd < 0 )
return ;
snprintf ( buf , sizeof ( buf ), "X%02x" , target_signal_to_gdb ( sig ));
put_packet ( s , buf );
}
2183
2184
static void gdb_accept ( void )
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
{
GDBState * s ;
struct sockaddr_in sockaddr ;
socklen_t len ;
int val , fd ;
for (;;) {
len = sizeof ( sockaddr );
fd = accept ( gdbserver_fd , ( struct sockaddr * ) & sockaddr , & len );
if ( fd < 0 && errno != EINTR ) {
perror ( "accept" );
return ;
} else if ( fd >= 0 ) {
2198
2199
2200
break ;
}
}
2201
2202
2203
/* set short latency */
val = 1 ;
2204
setsockopt ( fd , IPPROTO_TCP , TCP_NODELAY , ( char * ) & val , sizeof ( val ));
ths
authored
18 years ago
2205
2206
2207
2208
s = qemu_mallocz ( sizeof ( GDBState ));
s -> c_cpu = first_cpu ;
s -> g_cpu = first_cpu ;
2209
s -> fd = fd ;
2210
gdb_has_xml = 0 ;
2211
2212
gdbserver_state = s ;
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
fcntl ( fd , F_SETFL , O_NONBLOCK );
}
static int gdbserver_open ( int port )
{
struct sockaddr_in sockaddr ;
int fd , val , ret ;
fd = socket ( PF_INET , SOCK_STREAM , 0 );
if ( fd < 0 ) {
perror ( "socket" );
return - 1 ;
}
/* allow fast reuse */
val = 1 ;
2230
setsockopt ( fd , SOL_SOCKET , SO_REUSEADDR , ( char * ) & val , sizeof ( val ));
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
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 ;
}
return fd ;
}
int gdbserver_start ( int port )
{
gdbserver_fd = gdbserver_open ( port );
if ( gdbserver_fd < 0 )
return - 1 ;
/* accept connections */
2254
gdb_accept ();
2255
2256
return 0 ;
}
2257
2258
2259
2260
2261
/* Disable gdb stub for child processes. */
void gdbserver_fork ( CPUState * env )
{
GDBState * s = gdbserver_state ;
2262
if ( gdbserver_fd < 0 || s -> fd < 0 )
2263
2264
2265
2266
2267
2268
return ;
close ( s -> fd );
s -> fd = - 1 ;
cpu_breakpoint_remove_all ( env , BP_GDB );
cpu_watchpoint_remove_all ( env , BP_GDB );
}
2269
# else
ths
authored
18 years ago
2270
static int gdb_chr_can_receive ( void * opaque )
2271
{
2272
2273
2274
/* We can handle an arbitrarily large amount of data .
Pick the maximum packet size , which is as good as anything . */
return MAX_PACKET_LENGTH ;
2275
2276
}
ths
authored
18 years ago
2277
static void gdb_chr_receive ( void * opaque , const uint8_t * buf , int size )
2278
2279
2280
2281
{
int i ;
for ( i = 0 ; i < size ; i ++ ) {
2282
gdb_read_byte ( gdbserver_state , buf [ i ]);
2283
2284
2285
2286
2287
2288
2289
2290
}
}
static void gdb_chr_event ( void * opaque , int event )
{
switch ( event ) {
case CHR_EVENT_RESET :
vm_stop ( EXCP_INTERRUPT );
2291
gdb_has_xml = 0 ;
2292
2293
2294
2295
2296
2297
break ;
default :
break ;
}
}
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
static void gdb_monitor_output ( GDBState * s , const char * msg , int len )
{
char buf [ MAX_PACKET_LENGTH ];
buf [ 0 ] = 'O' ;
if ( len > ( MAX_PACKET_LENGTH / 2 ) - 1 )
len = ( MAX_PACKET_LENGTH / 2 ) - 1 ;
memtohex ( buf + 1 , ( uint8_t * ) msg , len );
put_packet ( s , buf );
}
static int gdb_monitor_write ( CharDriverState * chr , const uint8_t * buf , int len )
{
const char * p = ( const char * ) buf ;
int max_sz ;
max_sz = ( sizeof ( gdbserver_state -> last_packet ) - 2 ) / 2 ;
for (;;) {
if ( len <= max_sz ) {
gdb_monitor_output ( gdbserver_state , p , len );
break ;
}
gdb_monitor_output ( gdbserver_state , p , max_sz );
p += max_sz ;
len -= max_sz ;
}
return len ;
}
2327
2328
2329
2330
2331
2332
2333
2334
2335
# ifndef _WIN32
static void gdb_sigterm_handler ( int signal )
{
if ( vm_running )
vm_stop ( EXCP_INTERRUPT );
}
# endif
int gdbserver_start ( const char * device )
2336
2337
{
GDBState * s ;
2338
char gdbstub_device_name [ 128 ];
2339
2340
CharDriverState * chr = NULL ;
CharDriverState * mon_chr ;
2341
2342
2343
2344
2345
2346
2347
2348
2349
if ( ! device )
return - 1 ;
if ( strcmp ( device , "none" ) != 0 ) {
if ( strstart ( device , "tcp:" , NULL )) {
/* enforce required TCP attributes */
snprintf ( gdbstub_device_name , sizeof ( gdbstub_device_name ),
"%s,nowait,nodelay,server" , device );
device = gdbstub_device_name ;
2350
}
2351
2352
2353
# ifndef _WIN32
else if ( strcmp ( device , "stdio" ) == 0 ) {
struct sigaction act ;
2354
2355
2356
2357
2358
2359
2360
memset ( & act , 0 , sizeof ( act ));
act . sa_handler = gdb_sigterm_handler ;
sigaction ( SIGINT , & act , NULL );
}
# endif
chr = qemu_chr_open ( "gdb" , device , NULL );
2361
2362
2363
2364
2365
if ( ! chr )
return - 1 ;
qemu_chr_add_handlers ( chr , gdb_chr_can_receive , gdb_chr_receive ,
gdb_chr_event , NULL );
2366
2367
}
2368
2369
2370
2371
s = gdbserver_state ;
if ( ! s ) {
s = qemu_mallocz ( sizeof ( GDBState ));
gdbserver_state = s ;
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
qemu_add_vm_change_state_handler ( gdb_vm_state_change , NULL );
/* Initialize a monitor terminal for gdb */
mon_chr = qemu_mallocz ( sizeof ( * mon_chr ));
mon_chr -> chr_write = gdb_monitor_write ;
monitor_init ( mon_chr , 0 );
} else {
if ( s -> chr )
qemu_chr_close ( s -> chr );
mon_chr = s -> mon_chr ;
memset ( s , 0 , sizeof ( GDBState ));
}
2385
2386
s -> c_cpu = first_cpu ;
s -> g_cpu = first_cpu ;
2387
s -> chr = chr ;
2388
2389
s -> state = chr ? RS_IDLE : RS_INACTIVE ;
s -> mon_chr = mon_chr ;
2390
2391
2392
return 0 ;
}
2393
# endif