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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 "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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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 {
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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# 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 ;
enum {
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 */
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if ( gdb_has_xml )
return 0 ;
644
stfq_p ( mem_buf , env -> fpr [ n - 32 ]);
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
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 );
660
case 69 : GET_REGL ( env -> xer );
661
662
663
664
665
666
case 70 :
{
if ( gdb_has_xml )
return 0 ;
GET_REG32 ( 0 ); /* fpscr */
}
667
668
669
670
}
}
return 0 ;
}
671
672
673
674
675
676
677
678
679
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 */
680
681
if ( gdb_has_xml )
return 0 ;
682
env -> fpr [ n - 32 ] = ldfq_p ( mem_buf );
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
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 :
707
708
env -> xer = ldtul_p ( mem_buf );
return sizeof ( target_ulong );
709
710
case 70 :
/* fpscr */
711
712
if ( gdb_has_xml )
return 0 ;
713
714
715
716
return 4 ;
}
}
return 0 ;
717
}
718
719
# elif defined ( TARGET_SPARC )
720
721
722
# if defined ( TARGET_SPARC64 ) && ! defined ( TARGET_ABI32 )
# define NUM_CORE_REGS 86
723
# else
724
# define NUM_CORE_REGS 72
725
# endif
726
727
# ifdef TARGET_ABI32
728
# define GET_REGA ( val ) GET_REG32 ( val )
729
# else
730
# define GET_REGA ( val ) GET_REGL ( val )
731
# endif
732
733
734
735
736
737
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
{
if ( n < 8 ) {
/* g0..g7 */
GET_REGA ( env -> gregs [ n ]);
738
}
739
740
741
if ( n < 32 ) {
/* register window */
GET_REGA ( env -> regwptr [ n - 8 ]);
742
}
743
744
745
746
# if defined ( TARGET_ABI32 ) || ! defined ( TARGET_SPARC64 )
if ( n < 64 ) {
/* fprs */
GET_REG32 ( * (( uint32_t * ) & env -> fpr [ n - 32 ]));
747
748
}
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
749
750
751
752
753
754
755
756
757
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 */
758
default : GET_REGA ( 0 );
759
}
760
# else
761
762
763
764
765
766
767
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 ;
768
769
770
771
val = ( uint64_t ) * (( uint32_t * ) & env -> fpr [( n - 64 ) * 2 + 32 ]) << 32 ;
val |= * (( uint32_t * ) & env -> fpr [( n - 64 ) * 2 + 33 ]);
GET_REG64 ( val );
772
}
773
774
775
776
switch ( n ) {
case 80 : GET_REGL ( env -> pc );
case 81 : GET_REGL ( env -> npc );
case 82 : GET_REGL ((( uint64_t ) GET_CCR ( env ) << 32 ) |
777
778
779
(( env -> asi & 0xff ) << 24 ) |
(( env -> pstate & 0xfff ) << 8 ) |
GET_CWP64 ( env ));
780
781
782
783
case 83 : GET_REGL ( env -> fsr );
case 84 : GET_REGL ( env -> fprs );
case 85 : GET_REGL ( env -> y );
}
784
# endif
785
return 0 ;
786
787
}
788
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
789
{
790
791
792
793
# if defined ( TARGET_ABI32 )
abi_ulong tmp ;
tmp = ldl_p ( mem_buf );
794
# else
795
796
797
target_ulong tmp ;
tmp = ldtul_p ( mem_buf );
798
# endif
799
800
801
802
803
804
805
if ( n < 8 ) {
/* g0..g7 */
env -> gregs [ n ] = tmp ;
} else if ( n < 32 ) {
/* register window */
env -> regwptr [ n - 8 ] = tmp ;
806
}
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
# 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 ;
}
823
}
824
return 4 ;
825
# else
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
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 ;
}
849
}
850
return 8 ;
851
# endif
852
}
853
# elif defined ( TARGET_ARM )
854
855
856
857
858
859
860
861
/* 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"
862
863
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
864
{
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
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 ;
888
}
889
890
891
892
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
{
uint32_t tmp ;
893
894
tmp = ldl_p ( mem_buf );
895
896
897
898
899
/* 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 ;
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
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 ;
}
926
927
# elif defined ( TARGET_M68K )
928
929
# define NUM_CORE_REGS 18
930
931
# define GDB_CORE_XML "cf-core.xml"
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
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
951
952
953
954
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
{
uint32_t tmp ;
ths
authored
18 years ago
955
956
tmp = ldl_p ( mem_buf );
ths
authored
18 years ago
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
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
974
975
# define NUM_CORE_REGS 73
ths
authored
17 years ago
976
977
978
979
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
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 );
}
1008
1009
return 0 ;
1010
1011
}
ths
authored
18 years ago
1012
1013
1014
1015
1016
1017
1018
1019
1020
/* 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
1021
set_float_rounding_mode ( ieee_rm [ env -> active_fpu . fcr31 & 3 ], & env -> active_fpu . fp_status )
ths
authored
18 years ago
1022
1023
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
1024
{
1025
target_ulong tmp ;
1026
1027
tmp = ldtul_p ( mem_buf );
1028
1029
1030
1031
1032
1033
1034
1035
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
1036
if ( env -> CP0_Status & ( 1 << CP0St_FR ))
1037
env -> active_fpu . fpr [ n - 38 ]. d = tmp ;
ths
authored
17 years ago
1038
else
1039
1040
1041
1042
1043
1044
1045
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
1046
# ifndef CONFIG_SOFTFLOAT
1047
1048
/* no floating point exception for native float */
SET_FP_ENABLE ( env -> active_fpu . fcr31 , 0 );
ths
authored
18 years ago
1049
# endif
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
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 );
1071
}
1072
# elif defined ( TARGET_SH4 )
ths
authored
18 years ago
1073
1074
/* Hint: Use "set architecture sh4" in GDB to see fpu registers */
1075
1076
1077
/* FIXME: We should use XML for this. */
# define NUM_CORE_REGS 59
ths
authored
18 years ago
1078
1079
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
1080
{
1081
1082
1083
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
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 ;
1111
1112
}
1113
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
1114
{
1115
1116
1117
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
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 ;
1154
}
ths
authored
17 years ago
1155
1156
# elif defined ( TARGET_CRIS )
1157
1158
1159
# define NUM_CORE_REGS 49
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
ths
authored
17 years ago
1160
{
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
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
1184
}
1185
1186
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
ths
authored
17 years ago
1187
{
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
uint32_t tmp ;
if ( n > 49 )
return 0 ;
tmp = ldl_p ( mem_buf );
if ( n < 16 ) {
env -> regs [ n ] = tmp ;
}
1199
1200
1201
1202
1203
if ( n >= 21 && n < 32 ) {
env -> pregs [ n - 16 ] = tmp ;
}
/* FIXME: Should support function regs be writable? */
1204
1205
1206
switch ( n ) {
case 16 : return 1 ;
case 17 : return 1 ;
1207
case 18 : env -> pregs [ PR_PID ] = tmp ; break ;
1208
1209
1210
1211
1212
1213
case 19 : return 1 ;
case 20 : return 2 ;
case 32 : env -> pc = tmp ; break ;
}
return 4 ;
ths
authored
17 years ago
1214
}
1215
1216
1217
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
# 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 ;
}
1265
1266
1267
1268
1269
# 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
1270
{
1271
return 0 ;
ths
authored
17 years ago
1272
1273
}
1274
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
ths
authored
17 years ago
1275
{
1276
1277
return 0 ;
}
ths
authored
17 years ago
1278
1279
# endif
ths
authored
17 years ago
1280
1281
static int num_g_regs = NUM_CORE_REGS ;
ths
authored
17 years ago
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
# 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
1304
1305
static const char * get_feature_xml ( const char * p , const char ** newp )
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
{
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 ;
1324
1325
1326
1327
1328
1329
snprintf ( target_xml , sizeof ( target_xml ),
"<?xml version= \" 1.0 \" ?>"
"<!DOCTYPE target SYSTEM \" gdb-target.dtd \" >"
"<target>"
"<xi:include href= \" %s \" />" ,
GDB_CORE_XML );
1330
1331
for ( r = first_cpu -> gdb_regs ; r ; r = r -> next ) {
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
strcat ( target_xml , "<xi:include href= \" " );
strcat ( target_xml , r -> xml );
strcat ( target_xml , " \" />" );
}
strcat ( target_xml , "</target>" );
}
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
1348
1349
1350
1351
static int gdb_read_register ( CPUState * env , uint8_t * mem_buf , int reg )
{
GDBRegisterState * r ;
ths
authored
17 years ago
1352
1353
1354
if ( reg < NUM_CORE_REGS )
return cpu_gdb_read_register ( env , mem_buf , reg );
ths
authored
17 years ago
1355
1356
1357
1358
1359
1360
1361
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
1362
1363
}
1364
static int gdb_write_register ( CPUState * env , uint8_t * mem_buf , int reg )
ths
authored
17 years ago
1365
{
1366
GDBRegisterState * r ;
ths
authored
17 years ago
1367
1368
1369
1370
1371
1372
1373
1374
1375
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 );
}
}
1376
1377
1378
return 0 ;
}
1379
1380
1381
1382
1383
1384
1385
1386
1387
/* 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 )
1388
{
1389
1390
1391
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
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 ;
}
}
1417
1418
}
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
/* GDB breakpoint/watchpoint types */
# define GDB_BREAKPOINT_SW 0
# define GDB_BREAKPOINT_HW 1
# define GDB_WATCHPOINT_WRITE 2
# define GDB_WATCHPOINT_READ 3
# define GDB_WATCHPOINT_ACCESS 4
# 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
1434
static int gdb_breakpoint_insert ( target_ulong addr , target_ulong len , int type )
1435
{
1436
1437
1438
CPUState * env ;
int err = 0 ;
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
switch ( type ) {
case GDB_BREAKPOINT_SW :
case GDB_BREAKPOINT_HW :
1473
1474
1475
1476
1477
1478
for ( env = first_cpu ; env != NULL ; env = env -> next_cpu ) {
err = cpu_breakpoint_remove ( env , addr , BP_GDB );
if ( err )
break ;
}
return err ;
1479
1480
1481
1482
# ifndef CONFIG_USER_ONLY
case GDB_WATCHPOINT_WRITE :
case GDB_WATCHPOINT_READ :
case GDB_WATCHPOINT_ACCESS :
1483
1484
1485
1486
1487
1488
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 ;
1489
1490
1491
1492
1493
1494
# endif
default :
return - ENOSYS ;
}
}
1495
static void gdb_breakpoint_remove_all ( void )
1496
{
1497
1498
1499
1500
CPUState * env ;
for ( env = first_cpu ; env != NULL ; env = env -> next_cpu ) {
cpu_breakpoint_remove_all ( env , BP_GDB );
1501
# ifndef CONFIG_USER_ONLY
1502
cpu_watchpoint_remove_all ( env , BP_GDB );
1503
# endif
1504
}
1505
1506
}
1507
static int gdb_handle_packet ( GDBState * s , const char * line_buf )
1508
{
1509
CPUState * env ;
1510
const char * p ;
1511
int ch , reg_size , type , res , thread ;
1512
1513
1514
char buf [ MAX_PACKET_LENGTH ];
uint8_t mem_buf [ MAX_PACKET_LENGTH ];
uint8_t * registers ;
1515
target_ulong addr , len ;
ths
authored
18 years ago
1516
1517
1518
1519
1520
1521
1522
1523
# ifdef DEBUG_GDB
printf ( "command='%s' \n " , line_buf );
# endif
p = line_buf ;
ch = * p ++ ;
switch ( ch ) {
case '?' :
1524
/* TODO: Make this return the correct value for user-mode. */
1525
snprintf ( buf , sizeof ( buf ), "T%02xthread:%02x;" , GDB_SIGNAL_TRAP ,
1526
s -> c_cpu -> cpu_index + 1 );
1527
put_packet ( s , buf );
1528
1529
1530
1531
/* Remove all the breakpoints when this query is issued ,
* because gdb is doing and initial connect and the state
* should be cleaned up .
*/
1532
gdb_breakpoint_remove_all ();
1533
1534
1535
break ;
case 'c' :
if ( * p != '\0' ) {
1536
addr = strtoull ( p , ( char ** ) & p , 16 );
1537
# if defined ( TARGET_I386 )
1538
s -> c_cpu -> eip = addr ;
1539
# elif defined ( TARGET_PPC )
1540
s -> c_cpu -> nip = addr ;
1541
# elif defined ( TARGET_SPARC )
1542
1543
s -> c_cpu -> pc = addr ;
s -> c_cpu -> npc = addr + 4 ;
1544
# elif defined ( TARGET_ARM )
1545
s -> c_cpu -> regs [ 15 ] = addr ;
1546
# elif defined ( TARGET_SH4 )
1547
s -> c_cpu -> pc = addr ;
ths
authored
18 years ago
1548
# elif defined ( TARGET_MIPS )
1549
s -> c_cpu -> active_tc . PC = addr ;
ths
authored
17 years ago
1550
# elif defined ( TARGET_CRIS )
1551
s -> c_cpu -> pc = addr ;
1552
1553
# elif defined ( TARGET_ALPHA )
s -> c_cpu -> pc = addr ;
1554
# endif
1555
}
1556
s -> signal = 0 ;
1557
gdb_continue ( s );
1558
return RS_IDLE ;
1559
case 'C' :
1560
1561
1562
s -> signal = gdb_signal_to_target ( strtoul ( p , ( char ** ) & p , 16 ));
if ( s -> signal == - 1 )
s -> signal = 0 ;
1563
1564
gdb_continue ( s );
return RS_IDLE ;
1565
1566
1567
1568
1569
1570
case 'k' :
/* Kill the target */
fprintf ( stderr , " \n QEMU: Terminated via GDBstub \n " );
exit ( 0 );
case 'D' :
/* Detach packet */
1571
gdb_breakpoint_remove_all ();
1572
1573
1574
gdb_continue ( s );
put_packet ( s , "OK" );
break ;
1575
1576
case 's' :
if ( * p != '\0' ) {
ths
authored
18 years ago
1577
addr = strtoull ( p , ( char ** ) & p , 16 );
1578
# if defined ( TARGET_I386 )
1579
s -> c_cpu -> eip = addr ;
1580
# elif defined ( TARGET_PPC )
1581
s -> c_cpu -> nip = addr ;
1582
# elif defined ( TARGET_SPARC )
1583
1584
s -> c_cpu -> pc = addr ;
s -> c_cpu -> npc = addr + 4 ;
1585
# elif defined ( TARGET_ARM )
1586
s -> c_cpu -> regs [ 15 ] = addr ;
1587
# elif defined ( TARGET_SH4 )
1588
s -> c_cpu -> pc = addr ;
ths
authored
18 years ago
1589
# elif defined ( TARGET_MIPS )
1590
s -> c_cpu -> active_tc . PC = addr ;
ths
authored
17 years ago
1591
# elif defined ( TARGET_CRIS )
1592
s -> c_cpu -> pc = addr ;
1593
1594
# elif defined ( TARGET_ALPHA )
s -> c_cpu -> pc = addr ;
1595
# endif
1596
}
1597
cpu_single_step ( s -> c_cpu , sstep_flags );
1598
gdb_continue ( s );
1599
return RS_IDLE ;
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
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 )
1616
gdb_current_syscall_cb ( s -> c_cpu , ret , err );
1617
1618
1619
if ( type == 'C' ) {
put_packet ( s , "T02" );
} else {
1620
gdb_continue ( s );
1621
1622
1623
}
}
break ;
1624
case 'g' :
1625
1626
len = 0 ;
for ( addr = 0 ; addr < num_g_regs ; addr ++ ) {
1627
reg_size = gdb_read_register ( s -> g_cpu , mem_buf + len , addr );
1628
1629
1630
len += reg_size ;
}
memtohex ( buf , mem_buf , len );
1631
1632
1633
put_packet ( s , buf );
break ;
case 'G' :
1634
registers = mem_buf ;
1635
1636
len = strlen ( p ) / 2 ;
hextomem (( uint8_t * ) registers , p , len );
1637
for ( addr = 0 ; addr < num_g_regs && len > 0 ; addr ++ ) {
1638
reg_size = gdb_write_register ( s -> g_cpu , registers , addr );
1639
1640
1641
len -= reg_size ;
registers += reg_size ;
}
1642
1643
1644
put_packet ( s , "OK" );
break ;
case 'm' :
1645
addr = strtoull ( p , ( char ** ) & p , 16 );
1646
1647
if ( * p == ',' )
p ++ ;
1648
len = strtoull ( p , NULL , 16 );
1649
if ( cpu_memory_rw_debug ( s -> g_cpu , addr , mem_buf , len , 0 ) != 0 ) {
1650
1651
1652
1653
1654
put_packet ( s , "E14" );
} else {
memtohex ( buf , mem_buf , len );
put_packet ( s , buf );
}
1655
1656
break ;
case 'M' :
1657
addr = strtoull ( p , ( char ** ) & p , 16 );
1658
1659
if ( * p == ',' )
p ++ ;
1660
len = strtoull ( p , ( char ** ) & p , 16 );
1661
if ( * p == ':' )
1662
1663
p ++ ;
hextomem ( mem_buf , p , len );
1664
if ( cpu_memory_rw_debug ( s -> g_cpu , addr , mem_buf , len , 1 ) != 0 )
1665
put_packet ( s , "E14" );
1666
1667
1668
else
put_packet ( s , "OK" );
break ;
1669
1670
1671
1672
1673
1674
1675
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 );
1676
reg_size = gdb_read_register ( s -> g_cpu , mem_buf , addr );
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
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 );
1692
gdb_write_register ( s -> g_cpu , mem_buf , addr );
1693
1694
put_packet ( s , "OK" );
break ;
1695
1696
1697
1698
1699
case 'Z' :
case 'z' :
type = strtoul ( p , ( char ** ) & p , 16 );
if ( * p == ',' )
p ++ ;
1700
addr = strtoull ( p , ( char ** ) & p , 16 );
1701
1702
if ( * p == ',' )
p ++ ;
1703
len = strtoull ( p , ( char ** ) & p , 16 );
1704
if ( ch == 'Z' )
1705
res = gdb_breakpoint_insert ( addr , len , type );
1706
else
1707
res = gdb_breakpoint_remove ( addr , len , type );
1708
1709
1710
if ( res >= 0 )
put_packet ( s , "OK" );
else if ( res == - ENOSYS )
1711
put_packet ( s , "" );
1712
1713
else
put_packet ( s , "E22" );
1714
break ;
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
1753
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 ;
1754
case 'q' :
1755
1756
1757
1758
case 'Q' :
/* parse any 'q' packets here */
if ( ! strcmp ( p , "qemu.sstepbits" )) {
/* Query Breakpoint bit definitions */
1759
1760
1761
1762
snprintf ( buf , sizeof ( buf ), "ENABLE=%x,NOIRQ=%x,NOTIMER=%x" ,
SSTEP_ENABLE ,
SSTEP_NOIRQ ,
SSTEP_NOTIMER );
1763
1764
1765
1766
1767
1768
1769
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 */
1770
snprintf ( buf , sizeof ( buf ), "0x%x" , sstep_flags );
1771
1772
1773
1774
1775
1776
1777
1778
put_packet ( s , buf );
break ;
}
p ++ ;
type = strtoul ( p , ( char ** ) & p , 16 );
sstep_flags = type ;
put_packet ( s , "OK" );
break ;
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
} 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 ) {
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
1810
}
# ifdef CONFIG_LINUX_USER
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
1822
put_packet ( s , buf );
break ;
}
# endif
1823
if ( strncmp ( p , "Supported" , 9 ) == 0 ) {
1824
snprintf ( buf , sizeof ( buf ), "PacketSize=%x" , MAX_PACKET_LENGTH );
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
# ifdef GDB_CORE_XML
strcat ( buf , ";qXfer:features:read+" );
# 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 ;
1838
xml = get_feature_xml ( p , & p );
1839
if ( ! xml ) {
1840
snprintf ( buf , sizeof ( buf ), "E00" );
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
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 ) {
1854
snprintf ( buf , sizeof ( buf ), "E00" );
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
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 ;
1874
default :
1875
unknown_command :
1876
1877
1878
1879
1880
1881
1882
1883
/* put empty packet */
buf [ 0 ] = '\0' ;
put_packet ( s , buf );
break ;
}
return RS_IDLE ;
}
1884
1885
1886
1887
1888
1889
void gdb_set_stop_cpu ( CPUState * env )
{
gdbserver_state -> c_cpu = env ;
gdbserver_state -> g_cpu = env ;
}
1890
# ifndef CONFIG_USER_ONLY
1891
static void gdb_vm_state_change ( void * opaque , int running , int reason )
1892
{
1893
1894
GDBState * s = gdbserver_state ;
CPUState * env = s -> c_cpu ;
1895
char buf [ 256 ];
1896
const char * type ;
1897
1898
int ret ;
1899
1900
if ( running || ( reason != EXCP_DEBUG && reason != EXCP_INTERRUPT ) ||
s -> state == RS_SYSCALL )
1901
1902
return ;
1903
/* disable single step if it was enable */
1904
cpu_single_step ( env , 0 );
1905
1906
if ( reason == EXCP_DEBUG ) {
1907
1908
if ( env -> watchpoint_hit ) {
switch ( env -> watchpoint_hit -> flags & BP_MEM_ACCESS ) {
1909
case BP_MEM_READ :
1910
1911
type = "r" ;
break ;
1912
case BP_MEM_ACCESS :
1913
1914
1915
1916
1917
1918
type = "a" ;
break ;
default :
type = "" ;
break ;
}
1919
1920
snprintf ( buf , sizeof ( buf ),
"T%02xthread:%02x;%swatch:" TARGET_FMT_lx ";" ,
1921
GDB_SIGNAL_TRAP , env -> cpu_index + 1 , type ,
1922
env -> watchpoint_hit -> vaddr );
1923
put_packet ( s , buf );
1924
env -> watchpoint_hit = NULL ;
1925
1926
return ;
}
1927
tb_flush ( env );
1928
ret = GDB_SIGNAL_TRAP ;
1929
} else {
1930
ret = GDB_SIGNAL_INT ;
1931
}
1932
snprintf ( buf , sizeof ( buf ), "T%02xthread:%02x;" , ret , env -> cpu_index + 1 );
1933
1934
put_packet ( s , buf );
}
1935
# endif
1936
1937
1938
/* Send a gdb syscall request .
This accepts limited printf - style format specifiers , specifically :
1939
1940
1941
% x - target_ulong argument printed in hex .
% lx - 64 - bit argument printed in hex .
% s - string pointer ( target_ulong ) and length ( int ) pair . */
1942
void gdb_do_syscall ( gdb_syscall_complete_cb cb , const char * fmt , ...)
1943
1944
1945
1946
1947
{
va_list va ;
char buf [ 256 ];
char * p ;
target_ulong addr ;
1948
uint64_t i64 ;
1949
1950
GDBState * s ;
1951
s = gdbserver_state ;
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
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 );
1969
p += snprintf ( p , & buf [ sizeof ( buf )] - p , TARGET_FMT_lx , addr );
1970
break ;
1971
1972
1973
1974
case 'l' :
if ( * ( fmt ++ ) != 'x' )
goto bad_format ;
i64 = va_arg ( va , uint64_t );
1975
p += snprintf ( p , & buf [ sizeof ( buf )] - p , "%" PRIx64 , i64 );
1976
break ;
1977
1978
case 's' :
addr = va_arg ( va , target_ulong );
1979
1980
p += snprintf ( p , & buf [ sizeof ( buf )] - p , TARGET_FMT_lx "/%x" ,
addr , va_arg ( va , int ));
1981
1982
break ;
default :
1983
bad_format :
1984
1985
1986
1987
1988
1989
1990
1991
fprintf ( stderr , "gdbstub: Bad syscall format string '%s' \n " ,
fmt - 1 );
break ;
}
} else {
* ( p ++ ) = * ( fmt ++ );
}
}
1992
* p = 0 ;
1993
1994
1995
va_end ( va );
put_packet ( s , buf );
# ifdef CONFIG_USER_ONLY
1996
gdb_handlesig ( s -> c_cpu , 0 );
1997
# else
1998
cpu_interrupt ( s -> c_cpu , CPU_INTERRUPT_EXIT );
1999
2000
2001
# endif
}
2002
static void gdb_read_byte ( GDBState * s , int ch )
2003
2004
{
int i , csum ;
ths
authored
17 years ago
2005
uint8_t reply ;
2006
2007
# ifndef CONFIG_USER_ONLY
2008
2009
2010
2011
2012
2013
2014
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
2015
put_buffer ( s , ( uint8_t * ) s -> last_packet , s -> last_packet_len );
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
}
# 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 ;
}
2028
2029
2030
2031
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
2032
} else
2033
# endif
2034
{
2035
2036
2037
2038
2039
switch ( s -> state ) {
case RS_IDLE :
if ( ch == '$' ) {
s -> line_buf_index = 0 ;
s -> state = RS_GETLINE ;
2040
}
2041
break ;
2042
2043
2044
2045
2046
case RS_GETLINE :
if ( ch == '#' ) {
s -> state = RS_CHKSUM1 ;
} else if ( s -> line_buf_index >= sizeof ( s -> line_buf ) - 1 ) {
s -> state = RS_IDLE ;
2047
} else {
2048
s -> line_buf [ s -> line_buf_index ++ ] = ch ;
2049
2050
}
break ;
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
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
2063
2064
reply = '-' ;
put_buffer ( s , & reply , 1 );
2065
s -> state = RS_IDLE ;
2066
} else {
ths
authored
17 years ago
2067
2068
reply = '+' ;
put_buffer ( s , & reply , 1 );
2069
s -> state = gdb_handle_packet ( s , s -> line_buf );
2070
2071
}
break ;
2072
2073
default :
abort ();
2074
2075
2076
2077
}
}
}
2078
2079
# ifdef CONFIG_USER_ONLY
int
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
gdb_queuesig ( void )
{
GDBState * s ;
s = gdbserver_state ;
if ( gdbserver_fd < 0 || s -> fd < 0 )
return 0 ;
else
return 1 ;
}
int
2093
2094
2095
2096
2097
2098
gdb_handlesig ( CPUState * env , int sig )
{
GDBState * s ;
char buf [ 256 ];
int n ;
2099
s = gdbserver_state ;
2100
2101
if ( gdbserver_fd < 0 || s -> fd < 0 )
return sig ;
2102
2103
2104
2105
2106
2107
2108
/* disable single step if it was enabled */
cpu_single_step ( env , 0 );
tb_flush ( env );
if ( sig != 0 )
{
2109
snprintf ( buf , sizeof ( buf ), "S%02x" , target_signal_to_gdb ( sig ));
2110
2111
put_packet ( s , buf );
}
2112
2113
2114
2115
/* put_packet () might have detected that the peer terminated the
connection . */
if ( s -> fd < 0 )
return sig ;
2116
2117
2118
sig = 0 ;
s -> state = RS_IDLE ;
2119
2120
s -> running_state = 0 ;
while ( s -> running_state == 0 ) {
2121
2122
2123
2124
2125
2126
n = read ( s -> fd , buf , 256 );
if ( n > 0 )
{
int i ;
for ( i = 0 ; i < n ; i ++ )
2127
gdb_read_byte ( s , buf [ i ]);
2128
2129
2130
2131
2132
2133
2134
}
else if ( n == 0 || errno != EAGAIN )
{
/* XXX : Connection closed . Should probably wait for annother
connection before continuing . */
return sig ;
}
2135
}
2136
2137
sig = s -> signal ;
s -> signal = 0 ;
2138
2139
return sig ;
}
2140
2141
2142
2143
2144
2145
2146
/* Tell the remote gdb that the process has exited. */
void gdb_exit ( CPUState * env , int code )
{
GDBState * s ;
char buf [ 4 ];
2147
s = gdbserver_state ;
2148
2149
if ( gdbserver_fd < 0 || s -> fd < 0 )
return ;
2150
2151
2152
2153
2154
snprintf ( buf , sizeof ( buf ), "W%02x" , code );
put_packet ( s , buf );
}
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
/* 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 );
}
2168
2169
static void gdb_accept ( void )
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
{
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 ) {
2183
2184
2185
break ;
}
}
2186
2187
2188
/* set short latency */
val = 1 ;
2189
setsockopt ( fd , IPPROTO_TCP , TCP_NODELAY , ( char * ) & val , sizeof ( val ));
ths
authored
18 years ago
2190
2191
2192
s = qemu_mallocz ( sizeof ( GDBState ));
2193
memset ( s , 0 , sizeof ( GDBState ));
2194
2195
s -> c_cpu = first_cpu ;
s -> g_cpu = first_cpu ;
2196
s -> fd = fd ;
2197
gdb_has_xml = 0 ;
2198
2199
gdbserver_state = s ;
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
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 ;
2217
setsockopt ( fd , SOL_SOCKET , SO_REUSEADDR , ( char * ) & val , sizeof ( val ));
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
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 */
2241
gdb_accept ();
2242
2243
return 0 ;
}
2244
2245
2246
2247
2248
/* Disable gdb stub for child processes. */
void gdbserver_fork ( CPUState * env )
{
GDBState * s = gdbserver_state ;
2249
if ( gdbserver_fd < 0 || s -> fd < 0 )
2250
2251
2252
2253
2254
2255
return ;
close ( s -> fd );
s -> fd = - 1 ;
cpu_breakpoint_remove_all ( env , BP_GDB );
cpu_watchpoint_remove_all ( env , BP_GDB );
}
2256
# else
ths
authored
18 years ago
2257
static int gdb_chr_can_receive ( void * opaque )
2258
{
2259
2260
2261
/* We can handle an arbitrarily large amount of data .
Pick the maximum packet size , which is as good as anything . */
return MAX_PACKET_LENGTH ;
2262
2263
}
ths
authored
18 years ago
2264
static void gdb_chr_receive ( void * opaque , const uint8_t * buf , int size )
2265
2266
2267
2268
{
int i ;
for ( i = 0 ; i < size ; i ++ ) {
2269
gdb_read_byte ( gdbserver_state , buf [ i ]);
2270
2271
2272
2273
2274
2275
2276
2277
}
}
static void gdb_chr_event ( void * opaque , int event )
{
switch ( event ) {
case CHR_EVENT_RESET :
vm_stop ( EXCP_INTERRUPT );
2278
gdb_has_xml = 0 ;
2279
2280
2281
2282
2283
2284
break ;
default :
break ;
}
}
2285
int gdbserver_start ( const char * port )
2286
2287
{
GDBState * s ;
2288
2289
2290
2291
2292
2293
2294
char gdbstub_port_name [ 128 ];
int port_num ;
char * p ;
CharDriverState * chr ;
if ( ! port || !* port )
return - 1 ;
2295
2296
2297
2298
2299
2300
2301
2302
2303
port_num = strtol ( port , & p , 10 );
if ( * p == 0 ) {
/* A numeric value is interpreted as a port number. */
snprintf ( gdbstub_port_name , sizeof ( gdbstub_port_name ),
"tcp::%d,nowait,nodelay,server" , port_num );
port = gdbstub_port_name ;
}
2304
chr = qemu_chr_open ( "gdb" , port , NULL );
2305
2306
2307
2308
if ( ! chr )
return - 1 ;
s = qemu_mallocz ( sizeof ( GDBState ));
2309
2310
s -> c_cpu = first_cpu ;
s -> g_cpu = first_cpu ;
2311
s -> chr = chr ;
2312
gdbserver_state = s ;
ths
authored
18 years ago
2313
qemu_chr_add_handlers ( chr , gdb_chr_can_receive , gdb_chr_receive ,
2314
gdb_chr_event , NULL );
2315
qemu_add_vm_change_state_handler ( gdb_vm_state_change , NULL );
2316
2317
return 0 ;
}
2318
# endif