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/*
* gdb server stub
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*
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* Copyright ( c ) 2003 - 2005 Fabrice Bellard
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*
* This library is free software ; you can redistribute it and / or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation ; either
* version 2 of the License , or ( at your option ) any later version .
*
* This library is distributed in the hope that it will be useful ,
* but WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the GNU
* Lesser General Public License for more details .
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library ; if not , write to the Free Software
* Foundation , Inc ., 59 Temple Place , Suite 330 , Boston , MA 02111 - 1307 USA
*/
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# include "config.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-common.h"
# include "qemu-char.h"
# include "sysemu.h"
# include "gdbstub.h"
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# endif
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# include "qemu_socket.h"
# ifdef _WIN32
/* XXX: these constants may be independent of the host ones even for Unix */
# ifndef SIGTRAP
# define SIGTRAP 5
# endif
# ifndef SIGINT
# define SIGINT 2
# endif
# else
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# include < signal . h >
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# endif
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// # define DEBUG_GDB
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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 * env ; /* current CPU */
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enum RSState state ; /* parsing state */
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char line_buf [ 4096 ];
int line_buf_index ;
int line_csum ;
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uint8_t last_packet [ 4100 ];
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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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# 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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/* XXX: remove this hack. */
static GDBState gdbserver_state ;
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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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/* GDB stub state for use by semihosting syscalls. */
static GDBState * gdb_syscall_state ;
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 ) {
gdb_syscall_mode = ( gdb_syscall_state ? GDB_SYS_ENABLED
: GDB_SYS_DISABLED );
}
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 ( GDBState * s , char * buf )
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{
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int len , csum , i ;
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uint8_t * p ;
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# ifdef DEBUG_GDB
printf ( "reply='%s' \n " , buf );
# endif
for (;;) {
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p = s -> last_packet ;
* ( p ++ ) = '$' ;
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len = strlen ( buf );
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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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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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# if defined ( TARGET_I386 )
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# ifdef TARGET_X86_64
static const uint8_t gdb_x86_64_regs [ 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 ,
};
# endif
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static int cpu_gdb_read_registers ( CPUState * env , uint8_t * mem_buf )
{
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int i , fpus , nb_regs ;
uint8_t * p ;
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p = mem_buf ;
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# ifdef TARGET_X86_64
if ( env -> hflags & HF_CS64_MASK ) {
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nb_regs = 16 ;
for ( i = 0 ; i < 16 ; i ++ ) {
* ( uint64_t * ) p = tswap64 ( env -> regs [ gdb_x86_64_regs [ i ]]);
p += 8 ;
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}
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* ( uint64_t * ) p = tswap64 ( env -> eip );
p += 8 ;
} else
# endif
{
nb_regs = 8 ;
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for ( i = 0 ; i < 8 ; i ++ ) {
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* ( uint32_t * ) p = tswap32 ( env -> regs [ i ]);
p += 4 ;
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}
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* ( uint32_t * ) p = tswap32 ( env -> eip );
p += 4 ;
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}
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* ( uint32_t * ) p = tswap32 ( env -> eflags );
p += 4 ;
* ( uint32_t * ) p = tswap32 ( env -> segs [ R_CS ]. selector );
p += 4 ;
* ( uint32_t * ) p = tswap32 ( env -> segs [ R_SS ]. selector );
p += 4 ;
* ( uint32_t * ) p = tswap32 ( env -> segs [ R_DS ]. selector );
p += 4 ;
* ( uint32_t * ) p = tswap32 ( env -> segs [ R_ES ]. selector );
p += 4 ;
* ( uint32_t * ) p = tswap32 ( env -> segs [ R_FS ]. selector );
p += 4 ;
* ( uint32_t * ) p = tswap32 ( env -> segs [ R_GS ]. selector );
p += 4 ;
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for ( i = 0 ; i < 8 ; i ++ ) {
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/* XXX: convert floats */
# ifdef USE_X86LDOUBLE
memcpy ( p , & env -> fpregs [ i ], 10 );
# else
memset ( p , 0 , 10 );
# endif
p += 10 ;
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}
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* ( uint32_t * ) p = tswap32 ( env -> fpuc ); /* fctrl */
p += 4 ;
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fpus = ( env -> fpus & ~ 0x3800 ) | ( env -> fpstt & 0x7 ) << 11 ;
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* ( uint32_t * ) p = tswap32 ( fpus ); /* fstat */
p += 4 ;
* ( uint32_t * ) p = 0 ; /* ftag */
p += 4 ;
* ( uint32_t * ) p = 0 ; /* fiseg */
p += 4 ;
* ( uint32_t * ) p = 0 ; /* fioff */
p += 4 ;
* ( uint32_t * ) p = 0 ; /* foseg */
p += 4 ;
* ( uint32_t * ) p = 0 ; /* fooff */
p += 4 ;
* ( uint32_t * ) p = 0 ; /* fop */
p += 4 ;
for ( i = 0 ; i < nb_regs ; i ++ ) {
* ( uint64_t * ) p = tswap64 ( env -> xmm_regs [ i ]. XMM_Q ( 0 ));
p += 8 ;
* ( uint64_t * ) p = tswap64 ( env -> xmm_regs [ i ]. XMM_Q ( 1 ));
p += 8 ;
}
* ( uint32_t * ) p = tswap32 ( env -> mxcsr );
p += 4 ;
return p - mem_buf ;
}
static inline void cpu_gdb_load_seg ( CPUState * env , const uint8_t ** pp ,
int sreg )
{
const uint8_t * p ;
uint32_t sel ;
p = * pp ;
sel = tswap32 ( * ( uint32_t * ) p );
p += 4 ;
if ( sel != env -> segs [ sreg ]. selector ) {
# if defined ( CONFIG_USER_ONLY )
cpu_x86_load_seg ( env , sreg , sel );
# else
/* XXX : do it with a debug function which does not raise an
exception */
# endif
}
* pp = p ;
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}
static void cpu_gdb_write_registers ( CPUState * env , uint8_t * mem_buf , int size )
{
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const uint8_t * p = mem_buf ;
int i , nb_regs ;
uint16_t fpus ;
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# ifdef TARGET_X86_64
if ( env -> hflags & HF_CS64_MASK ) {
nb_regs = 16 ;
for ( i = 0 ; i < 16 ; i ++ ) {
env -> regs [ gdb_x86_64_regs [ i ]] = tswap64 ( * ( uint64_t * ) p );
p += 8 ;
}
env -> eip = tswap64 ( * ( uint64_t * ) p );
p += 8 ;
} else
# endif
{
nb_regs = 8 ;
for ( i = 0 ; i < 8 ; i ++ ) {
env -> regs [ i ] = tswap32 ( * ( uint32_t * ) p );
p += 4 ;
}
env -> eip = tswap32 ( * ( uint32_t * ) p );
p += 4 ;
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}
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env -> eflags = tswap32 ( * ( uint32_t * ) p );
p += 4 ;
cpu_gdb_load_seg ( env , & p , R_CS );
cpu_gdb_load_seg ( env , & p , R_SS );
cpu_gdb_load_seg ( env , & p , R_DS );
cpu_gdb_load_seg ( env , & p , R_ES );
cpu_gdb_load_seg ( env , & p , R_FS );
cpu_gdb_load_seg ( env , & p , R_GS );
/* FPU state */
for ( i = 0 ; i < 8 ; i ++ ) {
/* XXX: convert floats */
# ifdef USE_X86LDOUBLE
memcpy ( & env -> fpregs [ i ], p , 10 );
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# endif
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p += 10 ;
}
env -> fpuc = tswap32 ( * ( uint32_t * ) p ); /* fctrl */
p += 4 ;
fpus = tswap32 ( * ( uint32_t * ) p );
p += 4 ;
env -> fpstt = ( fpus >> 11 ) & 7 ;
env -> fpus = fpus & ~ 0x3800 ;
p += 4 * 6 ;
if ( size >= (( p - mem_buf ) + 16 * nb_regs + 4 )) {
/* SSE state */
for ( i = 0 ; i < nb_regs ; i ++ ) {
env -> xmm_regs [ i ]. XMM_Q ( 0 ) = tswap64 ( * ( uint64_t * ) p );
p += 8 ;
env -> xmm_regs [ i ]. XMM_Q ( 1 ) = tswap64 ( * ( uint64_t * ) p );
p += 8 ;
}
env -> mxcsr = tswap32 ( * ( uint32_t * ) p );
p += 4 ;
}
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}
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# elif defined ( TARGET_PPC )
static int cpu_gdb_read_registers ( CPUState * env , uint8_t * mem_buf )
{
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uint32_t * registers = ( uint32_t * ) mem_buf , tmp ;
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int i ;
/* fill in gprs */
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for ( i = 0 ; i < 32 ; i ++ ) {
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registers [ i ] = tswapl ( env -> gpr [ i ]);
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}
/* fill in fprs */
for ( i = 0 ; i < 32 ; i ++ ) {
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registers [( i * 2 ) + 32 ] = tswapl ( * (( uint32_t * ) & env -> fpr [ i ]));
registers [( i * 2 ) + 33 ] = tswapl ( * (( uint32_t * ) & env -> fpr [ i ] + 1 ));
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}
/* nip, msr, ccr, lnk, ctr, xer, mq */
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registers [ 96 ] = tswapl ( env -> nip );
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registers [ 97 ] = tswapl ( env -> msr );
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tmp = 0 ;
for ( i = 0 ; i < 8 ; i ++ )
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tmp |= env -> crf [ i ] << ( 32 - (( i + 1 ) * 4 ));
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registers [ 98 ] = tswapl ( tmp );
registers [ 99 ] = tswapl ( env -> lr );
registers [ 100 ] = tswapl ( env -> ctr );
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registers [ 101 ] = tswapl ( ppc_load_xer ( env ));
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registers [ 102 ] = 0 ;
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return 103 * 4 ;
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}
static void cpu_gdb_write_registers ( CPUState * env , uint8_t * mem_buf , int size )
{
uint32_t * registers = ( uint32_t * ) mem_buf ;
int i ;
/* fill in gprs */
for ( i = 0 ; i < 32 ; i ++ ) {
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env -> gpr [ i ] = tswapl ( registers [ i ]);
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}
/* fill in fprs */
for ( i = 0 ; i < 32 ; i ++ ) {
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* (( uint32_t * ) & env -> fpr [ i ]) = tswapl ( registers [( i * 2 ) + 32 ]);
* (( uint32_t * ) & env -> fpr [ i ] + 1 ) = tswapl ( registers [( i * 2 ) + 33 ]);
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}
/* nip, msr, ccr, lnk, ctr, xer, mq */
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env -> nip = tswapl ( registers [ 96 ]);
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ppc_store_msr ( env , tswapl ( registers [ 97 ]));
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registers [ 98 ] = tswapl ( registers [ 98 ]);
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for ( i = 0 ; i < 8 ; i ++ )
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env -> crf [ i ] = ( registers [ 98 ] >> ( 32 - (( i + 1 ) * 4 ))) & 0xF ;
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env -> lr = tswapl ( registers [ 99 ]);
env -> ctr = tswapl ( registers [ 100 ]);
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ppc_store_xer ( env , tswapl ( registers [ 101 ]));
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}
# elif defined ( TARGET_SPARC )
static int cpu_gdb_read_registers ( CPUState * env , uint8_t * mem_buf )
{
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target_ulong * registers = ( target_ulong * ) mem_buf ;
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int i ;
/* fill in g0..g7 */
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for ( i = 0 ; i < 8 ; i ++ ) {
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registers [ i ] = tswapl ( env -> gregs [ i ]);
}
/* fill in register window */
for ( i = 0 ; i < 24 ; i ++ ) {
registers [ i + 8 ] = tswapl ( env -> regwptr [ i ]);
}
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# ifndef TARGET_SPARC64
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/* fill in fprs */
for ( i = 0 ; i < 32 ; i ++ ) {
registers [ i + 32 ] = tswapl ( * (( uint32_t * ) & env -> fpr [ i ]));
}
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
registers [ 64 ] = tswapl ( env -> y );
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{
target_ulong tmp ;
tmp = GET_PSR ( env );
registers [ 65 ] = tswapl ( tmp );
}
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registers [ 66 ] = tswapl ( env -> wim );
registers [ 67 ] = tswapl ( env -> tbr );
registers [ 68 ] = tswapl ( env -> pc );
registers [ 69 ] = tswapl ( env -> npc );
registers [ 70 ] = tswapl ( env -> fsr );
registers [ 71 ] = 0 ; /* csr */
registers [ 72 ] = 0 ;
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return 73 * sizeof ( target_ulong );
# else
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/* fill in fprs */
for ( i = 0 ; i < 64 ; i += 2 ) {
uint64_t tmp ;
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tmp = (( uint64_t ) * ( uint32_t * ) & env -> fpr [ i ]) << 32 ;
tmp |= * ( uint32_t * ) & env -> fpr [ i + 1 ];
registers [ i / 2 + 32 ] = tswap64 ( tmp );
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}
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registers [ 64 ] = tswapl ( env -> pc );
registers [ 65 ] = tswapl ( env -> npc );
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registers [ 66 ] = tswapl ((( uint64_t ) GET_CCR ( env ) << 32 ) |
(( env -> asi & 0xff ) << 24 ) |
(( env -> pstate & 0xfff ) << 8 ) |
GET_CWP64 ( env ));
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registers [ 67 ] = tswapl ( env -> fsr );
registers [ 68 ] = tswapl ( env -> fprs );
registers [ 69 ] = tswapl ( env -> y );
return 70 * sizeof ( target_ulong );
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# endif
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}
static void cpu_gdb_write_registers ( CPUState * env , uint8_t * mem_buf , int size )
{
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target_ulong * registers = ( target_ulong * ) mem_buf ;
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int i ;
/* fill in g0..g7 */
for ( i = 0 ; i < 7 ; i ++ ) {
env -> gregs [ i ] = tswapl ( registers [ i ]);
}
/* fill in register window */
for ( i = 0 ; i < 24 ; i ++ ) {
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env -> regwptr [ i ] = tswapl ( registers [ i + 8 ]);
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}
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# ifndef TARGET_SPARC64
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/* fill in fprs */
for ( i = 0 ; i < 32 ; i ++ ) {
* (( uint32_t * ) & env -> fpr [ i ]) = tswapl ( registers [ i + 32 ]);
}
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
env -> y = tswapl ( registers [ 64 ]);
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PUT_PSR ( env , tswapl ( registers [ 65 ]));
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env -> wim = tswapl ( registers [ 66 ]);
env -> tbr = tswapl ( registers [ 67 ]);
env -> pc = tswapl ( registers [ 68 ]);
env -> npc = tswapl ( registers [ 69 ]);
env -> fsr = tswapl ( registers [ 70 ]);
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# else
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for ( i = 0 ; i < 64 ; i += 2 ) {
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uint64_t tmp ;
tmp = tswap64 ( registers [ i / 2 + 32 ]);
* (( uint32_t * ) & env -> fpr [ i ]) = tmp >> 32 ;
* (( uint32_t * ) & env -> fpr [ i + 1 ]) = tmp & 0xffffffff ;
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}
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env -> pc = tswapl ( registers [ 64 ]);
env -> npc = tswapl ( registers [ 65 ]);
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{
uint64_t tmp = tswapl ( registers [ 66 ]);
PUT_CCR ( env , tmp >> 32 );
env -> asi = ( tmp >> 24 ) & 0xff ;
env -> pstate = ( tmp >> 8 ) & 0xfff ;
PUT_CWP64 ( env , tmp & 0xff );
}
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env -> fsr = tswapl ( registers [ 67 ]);
env -> fprs = tswapl ( registers [ 68 ]);
env -> y = tswapl ( registers [ 69 ]);
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# endif
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}
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# elif defined ( TARGET_ARM )
static int cpu_gdb_read_registers ( CPUState * env , uint8_t * mem_buf )
{
int i ;
uint8_t * ptr ;
ptr = mem_buf ;
/* 16 core integer registers (4 bytes each). */
for ( i = 0 ; i < 16 ; i ++ )
{
* ( uint32_t * ) ptr = tswapl ( env -> regs [ i ]);
ptr += 4 ;
}
/* 8 FPA registers ( 12 bytes each ), FPS ( 4 bytes ).
Not yet implemented . */
memset ( ptr , 0 , 8 * 12 + 4 );
ptr += 8 * 12 + 4 ;
/* CPSR (4 bytes). */
595
* ( uint32_t * ) ptr = tswapl ( cpsr_read ( env ));
596
597
598
599
ptr += 4 ;
return ptr - mem_buf ;
}
600
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606
607
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609
610
611
612
613
614
static void cpu_gdb_write_registers ( CPUState * env , uint8_t * mem_buf , int size )
{
int i ;
uint8_t * ptr ;
ptr = mem_buf ;
/* Core integer registers. */
for ( i = 0 ; i < 16 ; i ++ )
{
env -> regs [ i ] = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
}
/* Ignore FPA regs and scr. */
ptr += 8 * 12 + 4 ;
615
cpsr_write ( env , tswapl ( * ( uint32_t * ) ptr ), 0xffffffff );
616
}
617
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# elif defined ( TARGET_M68K )
static int cpu_gdb_read_registers ( CPUState * env , uint8_t * mem_buf )
{
int i ;
uint8_t * ptr ;
CPU_DoubleU u ;
ptr = mem_buf ;
/* D0-D7 */
for ( i = 0 ; i < 8 ; i ++ ) {
* ( uint32_t * ) ptr = tswapl ( env -> dregs [ i ]);
ptr += 4 ;
}
/* A0-A7 */
for ( i = 0 ; i < 8 ; i ++ ) {
* ( uint32_t * ) ptr = tswapl ( env -> aregs [ i ]);
ptr += 4 ;
}
* ( uint32_t * ) ptr = tswapl ( env -> sr );
ptr += 4 ;
* ( uint32_t * ) ptr = tswapl ( env -> pc );
ptr += 4 ;
/* F0 - F7 . The 68881 / 68040 have 12 - bit extended precision registers .
ColdFire has 8 - bit double precision registers . */
for ( i = 0 ; i < 8 ; i ++ ) {
u . d = env -> fregs [ i ];
* ( uint32_t * ) ptr = tswap32 ( u . l . upper );
* ( uint32_t * ) ptr = tswap32 ( u . l . lower );
}
/* FP control regs (not implemented). */
memset ( ptr , 0 , 3 * 4 );
ptr += 3 * 4 ;
return ptr - mem_buf ;
}
static void cpu_gdb_write_registers ( CPUState * env , uint8_t * mem_buf , int size )
{
int i ;
uint8_t * ptr ;
CPU_DoubleU u ;
ptr = mem_buf ;
/* D0-D7 */
for ( i = 0 ; i < 8 ; i ++ ) {
env -> dregs [ i ] = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
}
/* A0-A7 */
for ( i = 0 ; i < 8 ; i ++ ) {
env -> aregs [ i ] = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
}
env -> sr = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
env -> pc = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
/* F0 - F7 . The 68881 / 68040 have 12 - bit extended precision registers .
ColdFire has 8 - bit double precision registers . */
for ( i = 0 ; i < 8 ; i ++ ) {
ths
authored
18 years ago
677
u . l . upper = tswap32 ( * ( uint32_t * ) ptr );
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680
681
682
683
u . l . lower = tswap32 ( * ( uint32_t * ) ptr );
env -> fregs [ i ] = u . d ;
}
/* FP control regs (not implemented). */
ptr += 3 * 4 ;
}
684
685
686
687
688
689
690
691
692
# elif defined ( TARGET_MIPS )
static int cpu_gdb_read_registers ( CPUState * env , uint8_t * mem_buf )
{
int i ;
uint8_t * ptr ;
ptr = mem_buf ;
for ( i = 0 ; i < 32 ; i ++ )
{
ths
authored
17 years ago
693
* ( target_ulong * ) ptr = tswapl ( env -> gpr [ env -> current_tc ][ i ]);
ths
authored
18 years ago
694
ptr += sizeof ( target_ulong );
695
696
}
ths
authored
17 years ago
697
* ( target_ulong * ) ptr = ( int32_t ) tswap32 ( env -> CP0_Status );
ths
authored
18 years ago
698
ptr += sizeof ( target_ulong );
699
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17 years ago
700
* ( target_ulong * ) ptr = tswapl ( env -> LO [ env -> current_tc ][ 0 ]);
ths
authored
18 years ago
701
ptr += sizeof ( target_ulong );
702
ths
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17 years ago
703
* ( target_ulong * ) ptr = tswapl ( env -> HI [ env -> current_tc ][ 0 ]);
ths
authored
18 years ago
704
ptr += sizeof ( target_ulong );
705
ths
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18 years ago
706
707
* ( target_ulong * ) ptr = tswapl ( env -> CP0_BadVAddr );
ptr += sizeof ( target_ulong );
708
ths
authored
17 years ago
709
* ( target_ulong * ) ptr = ( int32_t ) tswap32 ( env -> CP0_Cause );
ths
authored
18 years ago
710
ptr += sizeof ( target_ulong );
711
ths
authored
18 years ago
712
* ( target_ulong * ) ptr = tswapl ( env -> PC [ env -> current_tc ]);
ths
authored
18 years ago
713
ptr += sizeof ( target_ulong );
714
ths
authored
18 years ago
715
if ( env -> CP0_Config1 & ( 1 << CP0C1_FP ))
ths
authored
18 years ago
716
{
ths
authored
18 years ago
717
718
for ( i = 0 ; i < 32 ; i ++ )
{
ths
authored
17 years ago
719
720
721
722
if ( env -> CP0_Status & ( 1 << CP0St_FR ))
* ( target_ulong * ) ptr = tswapl ( env -> fpu -> fpr [ i ]. d );
else
* ( target_ulong * ) ptr = tswap32 ( env -> fpu -> fpr [ i ]. w [ FP_ENDIAN_IDX ]);
ths
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18 years ago
723
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
724
}
ths
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18 years ago
725
ths
authored
17 years ago
726
* ( target_ulong * ) ptr = ( int32_t ) tswap32 ( env -> fpu -> fcr31 );
ths
authored
18 years ago
727
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
728
ths
authored
17 years ago
729
* ( target_ulong * ) ptr = ( int32_t ) tswap32 ( env -> fpu -> fcr0 );
ths
authored
18 years ago
730
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
731
}
ths
authored
18 years ago
732
ths
authored
17 years ago
733
734
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736
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738
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741
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743
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746
/* "fp", pseudo frame pointer. Not yet implemented in gdb. */
* ( target_ulong * ) ptr = 0 ;
ptr += sizeof ( target_ulong );
/* Registers for embedded use, we just pad them. */
for ( i = 0 ; i < 16 ; i ++ )
{
* ( target_ulong * ) ptr = 0 ;
ptr += sizeof ( target_ulong );
}
/* Processor ID. */
* ( target_ulong * ) ptr = ( int32_t ) tswap32 ( env -> CP0_PRid );
ptr += sizeof ( target_ulong );
747
748
749
750
return ptr - mem_buf ;
}
ths
authored
18 years ago
751
752
753
754
755
756
757
758
759
/* 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
18 years ago
760
set_float_rounding_mode ( ieee_rm [ env -> fpu -> fcr31 & 3 ], & env -> fpu -> fp_status )
ths
authored
18 years ago
761
762
763
764
765
766
767
768
769
static void cpu_gdb_write_registers ( CPUState * env , uint8_t * mem_buf , int size )
{
int i ;
uint8_t * ptr ;
ptr = mem_buf ;
for ( i = 0 ; i < 32 ; i ++ )
{
ths
authored
17 years ago
770
env -> gpr [ env -> current_tc ][ i ] = tswapl ( * ( target_ulong * ) ptr );
ths
authored
18 years ago
771
ptr += sizeof ( target_ulong );
772
773
}
ths
authored
18 years ago
774
775
env -> CP0_Status = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
776
ths
authored
17 years ago
777
env -> LO [ env -> current_tc ][ 0 ] = tswapl ( * ( target_ulong * ) ptr );
ths
authored
18 years ago
778
ptr += sizeof ( target_ulong );
779
ths
authored
17 years ago
780
env -> HI [ env -> current_tc ][ 0 ] = tswapl ( * ( target_ulong * ) ptr );
ths
authored
18 years ago
781
ptr += sizeof ( target_ulong );
782
ths
authored
18 years ago
783
784
env -> CP0_BadVAddr = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
785
ths
authored
18 years ago
786
787
env -> CP0_Cause = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
788
ths
authored
18 years ago
789
env -> PC [ env -> current_tc ] = tswapl ( * ( target_ulong * ) ptr );
ths
authored
18 years ago
790
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
791
ths
authored
18 years ago
792
if ( env -> CP0_Config1 & ( 1 << CP0C1_FP ))
ths
authored
18 years ago
793
{
ths
authored
18 years ago
794
795
for ( i = 0 ; i < 32 ; i ++ )
{
ths
authored
17 years ago
796
797
798
799
if ( env -> CP0_Status & ( 1 << CP0St_FR ))
env -> fpu -> fpr [ i ]. d = tswapl ( * ( target_ulong * ) ptr );
else
env -> fpu -> fpr [ i ]. w [ FP_ENDIAN_IDX ] = tswapl ( * ( target_ulong * ) ptr );
ths
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18 years ago
800
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
801
}
ths
authored
18 years ago
802
ths
authored
17 years ago
803
env -> fpu -> fcr31 = tswapl ( * ( target_ulong * ) ptr ) & 0xFF83FFFF ;
ths
authored
18 years ago
804
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
805
ths
authored
17 years ago
806
/* The remaining registers are assumed to be read-only. */
ths
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18 years ago
807
ths
authored
18 years ago
808
809
/* set rounding mode */
RESTORE_ROUNDING_MODE ;
ths
authored
18 years ago
810
811
# ifndef CONFIG_SOFTFLOAT
ths
authored
18 years ago
812
813
/* no floating point exception for native float */
SET_FP_ENABLE ( env -> fcr31 , 0 );
ths
authored
18 years ago
814
# endif
ths
authored
18 years ago
815
}
816
}
817
# elif defined ( TARGET_SH4 )
ths
authored
18 years ago
818
819
820
/* Hint: Use "set architecture sh4" in GDB to see fpu registers */
821
822
823
824
825
826
static int cpu_gdb_read_registers ( CPUState * env , uint8_t * mem_buf )
{
uint32_t * ptr = ( uint32_t * ) mem_buf ;
int i ;
# define SAVE ( x ) * ptr ++= tswapl ( x )
827
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829
830
831
832
if (( env -> sr & ( SR_MD | SR_RB )) == ( SR_MD | SR_RB )) {
for ( i = 0 ; i < 8 ; i ++ ) SAVE ( env -> gregs [ i + 16 ]);
} else {
for ( i = 0 ; i < 8 ; i ++ ) SAVE ( env -> gregs [ i ]);
}
for ( i = 8 ; i < 16 ; i ++ ) SAVE ( env -> gregs [ i ]);
833
834
835
836
837
838
839
SAVE ( env -> pc );
SAVE ( env -> pr );
SAVE ( env -> gbr );
SAVE ( env -> vbr );
SAVE ( env -> mach );
SAVE ( env -> macl );
SAVE ( env -> sr );
ths
authored
18 years ago
840
841
842
843
844
845
846
847
SAVE ( env -> fpul );
SAVE ( env -> fpscr );
for ( i = 0 ; i < 16 ; i ++ )
SAVE ( env -> fregs [ i + (( env -> fpscr & FPSCR_FR ) ? 16 : 0 )]);
SAVE ( env -> ssr );
SAVE ( env -> spc );
for ( i = 0 ; i < 8 ; i ++ ) SAVE ( env -> gregs [ i ]);
for ( i = 0 ; i < 8 ; i ++ ) SAVE ( env -> gregs [ i + 16 ]);
848
849
850
851
852
853
854
855
856
return (( uint8_t * ) ptr - mem_buf );
}
static void cpu_gdb_write_registers ( CPUState * env , uint8_t * mem_buf , int size )
{
uint32_t * ptr = ( uint32_t * ) mem_buf ;
int i ;
# define LOAD ( x ) ( x ) =* ptr ++ ;
857
858
859
860
861
862
if (( env -> sr & ( SR_MD | SR_RB )) == ( SR_MD | SR_RB )) {
for ( i = 0 ; i < 8 ; i ++ ) LOAD ( env -> gregs [ i + 16 ]);
} else {
for ( i = 0 ; i < 8 ; i ++ ) LOAD ( env -> gregs [ i ]);
}
for ( i = 8 ; i < 16 ; i ++ ) LOAD ( env -> gregs [ i ]);
863
864
865
866
867
868
869
LOAD ( env -> pc );
LOAD ( env -> pr );
LOAD ( env -> gbr );
LOAD ( env -> vbr );
LOAD ( env -> mach );
LOAD ( env -> macl );
LOAD ( env -> sr );
ths
authored
18 years ago
870
871
872
873
874
875
876
877
LOAD ( env -> fpul );
LOAD ( env -> fpscr );
for ( i = 0 ; i < 16 ; i ++ )
LOAD ( env -> fregs [ i + (( env -> fpscr & FPSCR_FR ) ? 16 : 0 )]);
LOAD ( env -> ssr );
LOAD ( env -> spc );
for ( i = 0 ; i < 8 ; i ++ ) LOAD ( env -> gregs [ i ]);
for ( i = 0 ; i < 8 ; i ++ ) LOAD ( env -> gregs [ i + 16 ]);
878
}
ths
authored
17 years ago
879
880
881
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883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
# elif defined ( TARGET_CRIS )
static int cris_save_32 ( unsigned char * d , uint32_t value )
{
* d ++ = ( value );
* d ++ = ( value >>= 8 );
* d ++ = ( value >>= 8 );
* d ++ = ( value >>= 8 );
return 4 ;
}
static int cris_save_16 ( unsigned char * d , uint32_t value )
{
* d ++ = ( value );
* d ++ = ( value >>= 8 );
return 2 ;
}
static int cris_save_8 ( unsigned char * d , uint32_t value )
{
* d ++ = ( value );
return 1 ;
}
/* FIXME: this will bug on archs not supporting unaligned word accesses. */
static int cpu_gdb_read_registers ( CPUState * env , uint8_t * mem_buf )
{
uint8_t * ptr = mem_buf ;
uint8_t srs ;
int i ;
for ( i = 0 ; i < 16 ; i ++ )
ptr += cris_save_32 ( ptr , env -> regs [ i ]);
911
srs = env -> pregs [ PR_SRS ];
ths
authored
17 years ago
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
ptr += cris_save_8 ( ptr , env -> pregs [ 0 ]);
ptr += cris_save_8 ( ptr , env -> pregs [ 1 ]);
ptr += cris_save_32 ( ptr , env -> pregs [ 2 ]);
ptr += cris_save_8 ( ptr , srs );
ptr += cris_save_16 ( ptr , env -> pregs [ 4 ]);
for ( i = 5 ; i < 16 ; i ++ )
ptr += cris_save_32 ( ptr , env -> pregs [ i ]);
ptr += cris_save_32 ( ptr , env -> pc );
for ( i = 0 ; i < 16 ; i ++ )
ptr += cris_save_32 ( ptr , env -> sregs [ srs ][ i ]);
return (( uint8_t * ) ptr - mem_buf );
}
static void cpu_gdb_write_registers ( CPUState * env , uint8_t * mem_buf , int size )
{
uint32_t * ptr = ( uint32_t * ) mem_buf ;
int i ;
# define LOAD ( x ) ( x ) =* ptr ++ ;
for ( i = 0 ; i < 16 ; i ++ ) LOAD ( env -> regs [ i ]);
LOAD ( env -> pc );
}
939
# else
940
941
942
943
944
945
946
947
948
949
static int cpu_gdb_read_registers ( CPUState * env , uint8_t * mem_buf )
{
return 0 ;
}
static void cpu_gdb_write_registers ( CPUState * env , uint8_t * mem_buf , int size )
{
}
# endif
950
951
static int gdb_handle_packet ( GDBState * s , CPUState * env , const char * line_buf )
952
953
{
const char * p ;
954
int ch , reg_size , type ;
955
char buf [ 4096 ];
ths
authored
17 years ago
956
uint8_t mem_buf [ 4096 ];
957
uint32_t * registers ;
958
target_ulong addr , len ;
ths
authored
18 years ago
959
960
961
962
963
964
965
966
# ifdef DEBUG_GDB
printf ( "command='%s' \n " , line_buf );
# endif
p = line_buf ;
ch = * p ++ ;
switch ( ch ) {
case '?' :
967
/* TODO: Make this return the correct value for user-mode. */
968
969
snprintf ( buf , sizeof ( buf ), "S%02x" , SIGTRAP );
put_packet ( s , buf );
970
971
972
973
974
975
/* Remove all the breakpoints when this query is issued ,
* because gdb is doing and initial connect and the state
* should be cleaned up .
*/
cpu_breakpoint_remove_all ( env );
cpu_watchpoint_remove_all ( env );
976
977
978
break ;
case 'c' :
if ( * p != '\0' ) {
979
addr = strtoull ( p , ( char ** ) & p , 16 );
980
# if defined ( TARGET_I386 )
981
env -> eip = addr ;
982
# elif defined ( TARGET_PPC )
983
env -> nip = addr ;
984
985
986
# elif defined ( TARGET_SPARC )
env -> pc = addr ;
env -> npc = addr + 4 ;
987
988
# elif defined ( TARGET_ARM )
env -> regs [ 15 ] = addr ;
989
# elif defined ( TARGET_SH4 )
ths
authored
18 years ago
990
991
env -> pc = addr ;
# elif defined ( TARGET_MIPS )
ths
authored
18 years ago
992
env -> PC [ env -> current_tc ] = addr ;
ths
authored
17 years ago
993
994
# elif defined ( TARGET_CRIS )
env -> pc = addr ;
995
# endif
996
}
997
gdb_continue ( s );
998
return RS_IDLE ;
999
1000
1001
1002
case 'C' :
s -> signal = strtoul ( p , ( char ** ) & p , 16 );
gdb_continue ( s );
return RS_IDLE ;
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
case 'k' :
/* Kill the target */
fprintf ( stderr , " \n QEMU: Terminated via GDBstub \n " );
exit ( 0 );
case 'D' :
/* Detach packet */
cpu_breakpoint_remove_all ( env );
cpu_watchpoint_remove_all ( env );
gdb_continue ( s );
put_packet ( s , "OK" );
break ;
1014
1015
case 's' :
if ( * p != '\0' ) {
ths
authored
18 years ago
1016
addr = strtoull ( p , ( char ** ) & p , 16 );
1017
# if defined ( TARGET_I386 )
1018
env -> eip = addr ;
1019
# elif defined ( TARGET_PPC )
1020
env -> nip = addr ;
1021
1022
1023
# elif defined ( TARGET_SPARC )
env -> pc = addr ;
env -> npc = addr + 4 ;
1024
1025
# elif defined ( TARGET_ARM )
env -> regs [ 15 ] = addr ;
1026
# elif defined ( TARGET_SH4 )
ths
authored
18 years ago
1027
1028
env -> pc = addr ;
# elif defined ( TARGET_MIPS )
ths
authored
18 years ago
1029
env -> PC [ env -> current_tc ] = addr ;
ths
authored
17 years ago
1030
1031
# elif defined ( TARGET_CRIS )
env -> pc = addr ;
1032
# endif
1033
}
1034
cpu_single_step ( env , sstep_flags );
1035
gdb_continue ( s );
1036
return RS_IDLE ;
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
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 )
gdb_current_syscall_cb ( s -> env , ret , err );
if ( type == 'C' ) {
put_packet ( s , "T02" );
} else {
1057
gdb_continue ( s );
1058
1059
1060
}
}
break ;
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
case 'g' :
reg_size = cpu_gdb_read_registers ( env , mem_buf );
memtohex ( buf , mem_buf , reg_size );
put_packet ( s , buf );
break ;
case 'G' :
registers = ( void * ) mem_buf ;
len = strlen ( p ) / 2 ;
hextomem (( uint8_t * ) registers , p , len );
cpu_gdb_write_registers ( env , mem_buf , len );
put_packet ( s , "OK" );
break ;
case 'm' :
1074
addr = strtoull ( p , ( char ** ) & p , 16 );
1075
1076
if ( * p == ',' )
p ++ ;
1077
len = strtoull ( p , NULL , 16 );
1078
1079
1080
1081
1082
1083
if ( cpu_memory_rw_debug ( env , addr , mem_buf , len , 0 ) != 0 ) {
put_packet ( s , "E14" );
} else {
memtohex ( buf , mem_buf , len );
put_packet ( s , buf );
}
1084
1085
break ;
case 'M' :
1086
addr = strtoull ( p , ( char ** ) & p , 16 );
1087
1088
if ( * p == ',' )
p ++ ;
1089
len = strtoull ( p , ( char ** ) & p , 16 );
1090
if ( * p == ':' )
1091
1092
1093
p ++ ;
hextomem ( mem_buf , p , len );
if ( cpu_memory_rw_debug ( env , addr , mem_buf , len , 1 ) != 0 )
1094
put_packet ( s , "E14" );
1095
1096
1097
1098
1099
1100
1101
else
put_packet ( s , "OK" );
break ;
case 'Z' :
type = strtoul ( p , ( char ** ) & p , 16 );
if ( * p == ',' )
p ++ ;
1102
addr = strtoull ( p , ( char ** ) & p , 16 );
1103
1104
if ( * p == ',' )
p ++ ;
1105
len = strtoull ( p , ( char ** ) & p , 16 );
1106
1107
1108
1109
if ( type == 0 || type == 1 ) {
if ( cpu_breakpoint_insert ( env , addr ) < 0 )
goto breakpoint_error ;
put_packet ( s , "OK" );
1110
1111
1112
1113
1114
1115
# ifndef CONFIG_USER_ONLY
} else if ( type == 2 ) {
if ( cpu_watchpoint_insert ( env , addr ) < 0 )
goto breakpoint_error ;
put_packet ( s , "OK" );
# endif
1116
1117
} else {
breakpoint_error :
1118
put_packet ( s , "E22" );
1119
1120
1121
1122
1123
1124
}
break ;
case 'z' :
type = strtoul ( p , ( char ** ) & p , 16 );
if ( * p == ',' )
p ++ ;
1125
addr = strtoull ( p , ( char ** ) & p , 16 );
1126
1127
if ( * p == ',' )
p ++ ;
1128
len = strtoull ( p , ( char ** ) & p , 16 );
1129
1130
1131
if ( type == 0 || type == 1 ) {
cpu_breakpoint_remove ( env , addr );
put_packet ( s , "OK" );
1132
1133
1134
1135
1136
# ifndef CONFIG_USER_ONLY
} else if ( type == 2 ) {
cpu_watchpoint_remove ( env , addr );
put_packet ( s , "OK" );
# endif
1137
1138
1139
1140
} else {
goto breakpoint_error ;
}
break ;
1141
case 'q' :
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
case 'Q' :
/* parse any 'q' packets here */
if ( ! strcmp ( p , "qemu.sstepbits" )) {
/* Query Breakpoint bit definitions */
sprintf ( buf , "ENABLE=%x,NOIRQ=%x,NOTIMER=%x" ,
SSTEP_ENABLE ,
SSTEP_NOIRQ ,
SSTEP_NOTIMER );
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 */
sprintf ( buf , "0x%x" , sstep_flags );
put_packet ( s , buf );
break ;
}
p ++ ;
type = strtoul ( p , ( char ** ) & p , 16 );
sstep_flags = type ;
put_packet ( s , "OK" );
break ;
}
# ifdef CONFIG_LINUX_USER
else if ( strncmp ( p , "Offsets" , 7 ) == 0 ) {
1169
1170
TaskState * ts = env -> opaque ;
ths
authored
18 years ago
1171
sprintf ( buf ,
1172
1173
"Text=" TARGET_ABI_FMT_lx ";Data=" TARGET_ABI_FMT_lx
";Bss=" TARGET_ABI_FMT_lx ,
ths
authored
18 years ago
1174
1175
1176
ts -> info -> code_offset ,
ts -> info -> data_offset ,
ts -> info -> data_offset );
1177
1178
1179
1180
put_packet ( s , buf );
break ;
}
# endif
1181
/* Fall through. */
1182
1183
1184
1185
1186
1187
1188
1189
1190
default :
/* put empty packet */
buf [ 0 ] = '\0' ;
put_packet ( s , buf );
break ;
}
return RS_IDLE ;
}
1191
1192
extern void tb_flush ( CPUState * env );
1193
# ifndef CONFIG_USER_ONLY
1194
1195
1196
1197
1198
1199
static void gdb_vm_stopped ( void * opaque , int reason )
{
GDBState * s = opaque ;
char buf [ 256 ];
int ret ;
1200
1201
1202
if ( s -> state == RS_SYSCALL )
return ;
1203
/* disable single step if it was enable */
1204
cpu_single_step ( s -> env , 0 );
1205
1206
if ( reason == EXCP_DEBUG ) {
1207
if ( s -> env -> watchpoint_hit ) {
1208
1209
snprintf ( buf , sizeof ( buf ), "T%02xwatch:" TARGET_FMT_lx ";" ,
SIGTRAP ,
1210
1211
1212
1213
1214
s -> env -> watchpoint [ s -> env -> watchpoint_hit - 1 ]. vaddr );
put_packet ( s , buf );
s -> env -> watchpoint_hit = 0 ;
return ;
}
1215
tb_flush ( s -> env );
1216
ret = SIGTRAP ;
1217
1218
1219
} else if ( reason == EXCP_INTERRUPT ) {
ret = SIGINT ;
} else {
1220
ret = 0 ;
1221
}
1222
1223
1224
snprintf ( buf , sizeof ( buf ), "S%02x" , ret );
put_packet ( s , buf );
}
1225
# endif
1226
1227
1228
/* Send a gdb syscall request .
This accepts limited printf - style format specifiers , specifically :
1229
1230
1231
% x - target_ulong argument printed in hex .
% lx - 64 - bit argument printed in hex .
% s - string pointer ( target_ulong ) and length ( int ) pair . */
1232
1233
1234
1235
1236
1237
void gdb_do_syscall ( gdb_syscall_complete_cb cb , char * fmt , ...)
{
va_list va ;
char buf [ 256 ];
char * p ;
target_ulong addr ;
1238
uint64_t i64 ;
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
GDBState * s ;
s = gdb_syscall_state ;
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 );
p += sprintf ( p , TARGET_FMT_lx , addr );
break ;
1261
1262
1263
1264
1265
1266
case 'l' :
if ( * ( fmt ++ ) != 'x' )
goto bad_format ;
i64 = va_arg ( va , uint64_t );
p += sprintf ( p , "%" PRIx64 , i64 );
break ;
1267
1268
1269
1270
1271
case 's' :
addr = va_arg ( va , target_ulong );
p += sprintf ( p , TARGET_FMT_lx "/%x" , addr , va_arg ( va , int ));
break ;
default :
1272
bad_format :
1273
1274
1275
1276
1277
1278
1279
1280
fprintf ( stderr , "gdbstub: Bad syscall format string '%s' \n " ,
fmt - 1 );
break ;
}
} else {
* ( p ++ ) = * ( fmt ++ );
}
}
1281
* p = 0 ;
1282
1283
1284
1285
1286
1287
1288
1289
1290
va_end ( va );
put_packet ( s , buf );
# ifdef CONFIG_USER_ONLY
gdb_handlesig ( s -> env , 0 );
# else
cpu_interrupt ( s -> env , CPU_INTERRUPT_EXIT );
# endif
}
1291
static void gdb_read_byte ( GDBState * s , int ch )
1292
{
1293
CPUState * env = s -> env ;
1294
int i , csum ;
ths
authored
17 years ago
1295
uint8_t reply ;
1296
1297
# ifndef CONFIG_USER_ONLY
1298
1299
1300
1301
1302
1303
1304
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
1305
put_buffer ( s , ( uint8_t * ) s -> last_packet , s -> last_packet_len );
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
}
# 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 != '$' )
return ;
}
1318
1319
1320
1321
if ( vm_running ) {
/* when the CPU is running , we cannot do anything except stop
it when receiving a char */
vm_stop ( EXCP_INTERRUPT );
ths
authored
18 years ago
1322
} else
1323
# endif
1324
{
1325
1326
1327
1328
1329
switch ( s -> state ) {
case RS_IDLE :
if ( ch == '$' ) {
s -> line_buf_index = 0 ;
s -> state = RS_GETLINE ;
1330
}
1331
break ;
1332
1333
1334
1335
1336
case RS_GETLINE :
if ( ch == '#' ) {
s -> state = RS_CHKSUM1 ;
} else if ( s -> line_buf_index >= sizeof ( s -> line_buf ) - 1 ) {
s -> state = RS_IDLE ;
1337
} else {
1338
s -> line_buf [ s -> line_buf_index ++ ] = ch ;
1339
1340
}
break ;
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
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
1353
1354
reply = '-' ;
put_buffer ( s , & reply , 1 );
1355
s -> state = RS_IDLE ;
1356
} else {
ths
authored
17 years ago
1357
1358
reply = '+' ;
put_buffer ( s , & reply , 1 );
1359
s -> state = gdb_handle_packet ( s , env , s -> line_buf );
1360
1361
}
break ;
1362
1363
default :
abort ();
1364
1365
1366
1367
}
}
}
1368
1369
1370
1371
1372
1373
1374
1375
1376
# ifdef CONFIG_USER_ONLY
int
gdb_handlesig ( CPUState * env , int sig )
{
GDBState * s ;
char buf [ 256 ];
int n ;
s = & gdbserver_state ;
1377
1378
if ( gdbserver_fd < 0 || s -> fd < 0 )
return sig ;
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
/* disable single step if it was enabled */
cpu_single_step ( env , 0 );
tb_flush ( env );
if ( sig != 0 )
{
snprintf ( buf , sizeof ( buf ), "S%02x" , sig );
put_packet ( s , buf );
}
1389
1390
1391
1392
/* put_packet () might have detected that the peer terminated the
connection . */
if ( s -> fd < 0 )
return sig ;
1393
1394
1395
sig = 0 ;
s -> state = RS_IDLE ;
1396
1397
s -> running_state = 0 ;
while ( s -> running_state == 0 ) {
1398
1399
1400
1401
1402
1403
n = read ( s -> fd , buf , 256 );
if ( n > 0 )
{
int i ;
for ( i = 0 ; i < n ; i ++ )
1404
gdb_read_byte ( s , buf [ i ]);
1405
1406
1407
1408
1409
1410
1411
}
else if ( n == 0 || errno != EAGAIN )
{
/* XXX : Connection closed . Should probably wait for annother
connection before continuing . */
return sig ;
}
1412
}
1413
1414
sig = s -> signal ;
s -> signal = 0 ;
1415
1416
return sig ;
}
1417
1418
1419
1420
1421
1422
1423
1424
/* Tell the remote gdb that the process has exited. */
void gdb_exit ( CPUState * env , int code )
{
GDBState * s ;
char buf [ 4 ];
s = & gdbserver_state ;
1425
1426
if ( gdbserver_fd < 0 || s -> fd < 0 )
return ;
1427
1428
1429
1430
1431
snprintf ( buf , sizeof ( buf ), "W%02x" , code );
put_packet ( s , buf );
}
1432
1433
static void gdb_accept ( void * opaque )
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
{
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 ) {
1447
1448
1449
break ;
}
}
1450
1451
1452
/* set short latency */
val = 1 ;
1453
setsockopt ( fd , IPPROTO_TCP , TCP_NODELAY , ( char * ) & val , sizeof ( val ));
ths
authored
18 years ago
1454
1455
1456
s = & gdbserver_state ;
memset ( s , 0 , sizeof ( GDBState ));
1457
s -> env = first_cpu ; /* XXX: allow to change CPU */
1458
1459
s -> fd = fd ;
1460
1461
gdb_syscall_state = s ;
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
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 ;
1478
setsockopt ( fd , SOL_SOCKET , SO_REUSEADDR , ( char * ) & val , sizeof ( val ));
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
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 */
1502
gdb_accept ( NULL );
1503
1504
return 0 ;
}
1505
# else
ths
authored
18 years ago
1506
static int gdb_chr_can_receive ( void * opaque )
1507
1508
1509
1510
{
return 1 ;
}
ths
authored
18 years ago
1511
static void gdb_chr_receive ( void * opaque , const uint8_t * buf , int size )
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
{
GDBState * s = opaque ;
int i ;
for ( i = 0 ; i < size ; i ++ ) {
gdb_read_byte ( s , buf [ i ]);
}
}
static void gdb_chr_event ( void * opaque , int event )
{
switch ( event ) {
case CHR_EVENT_RESET :
vm_stop ( EXCP_INTERRUPT );
1526
gdb_syscall_state = opaque ;
1527
1528
1529
1530
1531
1532
break ;
default :
break ;
}
}
1533
int gdbserver_start ( const char * port )
1534
1535
{
GDBState * s ;
1536
1537
1538
1539
1540
1541
1542
char gdbstub_port_name [ 128 ];
int port_num ;
char * p ;
CharDriverState * chr ;
if ( ! port || !* port )
return - 1 ;
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
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 ;
}
chr = qemu_chr_open ( port );
1553
1554
1555
1556
1557
1558
1559
1560
1561
if ( ! chr )
return - 1 ;
s = qemu_mallocz ( sizeof ( GDBState ));
if ( ! s ) {
return - 1 ;
}
s -> env = first_cpu ; /* XXX: allow to change CPU */
s -> chr = chr ;
ths
authored
18 years ago
1562
qemu_chr_add_handlers ( chr , gdb_chr_can_receive , gdb_chr_receive ,
1563
1564
gdb_chr_event , s );
qemu_add_vm_stop_handler ( gdb_vm_stopped , s );
1565
1566
return 0 ;
}
1567
# endif