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/*
* gdb server stub
*
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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 "vl.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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char last_packet [ 4100 ];
int last_packet_len ;
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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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# 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 ) {
if ( errno != EINTR && errno != EAGAIN )
return - 1 ;
} else if ( ret == 0 ) {
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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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 ;
char * 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 ;
put_buffer ( s , 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 )
static int cpu_gdb_read_registers ( CPUState * env , uint8_t * mem_buf )
{
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uint32_t * registers = ( uint32_t * ) mem_buf ;
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int i , fpus ;
for ( i = 0 ; i < 8 ; i ++ ) {
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registers [ i ] = env -> regs [ i ];
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}
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registers [ 8 ] = env -> eip ;
registers [ 9 ] = env -> eflags ;
registers [ 10 ] = env -> segs [ R_CS ]. selector ;
registers [ 11 ] = env -> segs [ R_SS ]. selector ;
registers [ 12 ] = env -> segs [ R_DS ]. selector ;
registers [ 13 ] = env -> segs [ R_ES ]. selector ;
registers [ 14 ] = env -> segs [ R_FS ]. selector ;
registers [ 15 ] = env -> segs [ R_GS ]. selector ;
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/* XXX: convert floats */
for ( i = 0 ; i < 8 ; i ++ ) {
memcpy ( mem_buf + 16 * 4 + i * 10 , & env -> fpregs [ i ], 10 );
}
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registers [ 36 ] = env -> fpuc ;
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fpus = ( env -> fpus & ~ 0x3800 ) | ( env -> fpstt & 0x7 ) << 11 ;
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registers [ 37 ] = fpus ;
registers [ 38 ] = 0 ; /* XXX: convert tags */
registers [ 39 ] = 0 ; /* fiseg */
registers [ 40 ] = 0 ; /* fioff */
registers [ 41 ] = 0 ; /* foseg */
registers [ 42 ] = 0 ; /* fooff */
registers [ 43 ] = 0 ; /* fop */
for ( i = 0 ; i < 16 ; i ++ )
tswapls ( & registers [ i ]);
for ( i = 36 ; i < 44 ; i ++ )
tswapls ( & registers [ i ]);
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return 44 * 4 ;
}
static void cpu_gdb_write_registers ( CPUState * env , uint8_t * mem_buf , int size )
{
uint32_t * registers = ( uint32_t * ) mem_buf ;
int i ;
for ( i = 0 ; i < 8 ; i ++ ) {
env -> regs [ i ] = tswapl ( registers [ i ]);
}
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env -> eip = tswapl ( registers [ 8 ]);
env -> eflags = tswapl ( registers [ 9 ]);
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# if defined ( CONFIG_USER_ONLY )
# define LOAD_SEG ( index , sreg ) \
if ( tswapl ( registers [ index ]) != env -> segs [ sreg ]. selector ) \
cpu_x86_load_seg ( env , sreg , tswapl ( registers [ index ]));
LOAD_SEG ( 10 , R_CS );
LOAD_SEG ( 11 , R_SS );
LOAD_SEG ( 12 , R_DS );
LOAD_SEG ( 13 , R_ES );
LOAD_SEG ( 14 , R_FS );
LOAD_SEG ( 15 , R_GS );
# endif
}
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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 ( do_load_msr ( env ));
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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 ( do_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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do_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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do_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 ;
tmp = ( uint64_t ) tswap32 ( * (( uint32_t * ) & env -> fpr [ i ])) << 32 ;
tmp |= tswap32 ( * (( uint32_t * ) & env -> fpr [ i + 1 ]));
registers [ i / 2 + 32 ] = tmp ;
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}
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registers [ 64 ] = tswapl ( env -> pc );
registers [ 65 ] = tswapl ( env -> npc );
registers [ 66 ] = tswapl ( env -> tstate [ env -> tl ]);
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 ) {
* (( uint32_t * ) & env -> fpr [ i ]) = tswap32 ( registers [ i / 2 + 32 ] >> 32 );
* (( uint32_t * ) & env -> fpr [ i + 1 ]) = tswap32 ( registers [ i / 2 + 32 ] & 0xffffffff );
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}
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env -> pc = tswapl ( registers [ 64 ]);
env -> npc = tswapl ( registers [ 65 ]);
env -> tstate [ env -> tl ] = tswapl ( registers [ 66 ]);
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). */
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* ( uint32_t * ) ptr = tswapl ( cpsr_read ( env ));
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ptr += 4 ;
return ptr - mem_buf ;
}
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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 ;
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cpsr_write ( env , tswapl ( * ( uint32_t * ) ptr ), 0xffffffff );
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}
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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 ++ ) {
u . l . upper = tswap32 ( * ( uint32_t * ) ptr );
u . l . lower = tswap32 ( * ( uint32_t * ) ptr );
env -> fregs [ i ] = u . d ;
}
/* FP control regs (not implemented). */
ptr += 3 * 4 ;
}
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# 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 ++ )
{
* ( uint32_t * ) ptr = tswapl ( env -> gpr [ i ]);
ptr += 4 ;
}
* ( uint32_t * ) ptr = tswapl ( env -> CP0_Status );
ptr += 4 ;
* ( uint32_t * ) ptr = tswapl ( env -> LO );
ptr += 4 ;
* ( uint32_t * ) ptr = tswapl ( env -> HI );
ptr += 4 ;
* ( uint32_t * ) ptr = tswapl ( env -> CP0_BadVAddr );
ptr += 4 ;
* ( uint32_t * ) ptr = tswapl ( env -> CP0_Cause );
ptr += 4 ;
* ( uint32_t * ) ptr = tswapl ( env -> PC );
ptr += 4 ;
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18 years ago
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# ifdef MIPS_USES_FPU
for ( i = 0 ; i < 32 ; i ++ )
{
* ( uint32_t * ) ptr = tswapl ( FPR_W ( env , i ));
ptr += 4 ;
}
* ( uint32_t * ) ptr = tswapl ( env -> fcr31 );
ptr += 4 ;
* ( uint32_t * ) ptr = tswapl ( env -> fcr0 );
ptr += 4 ;
# endif
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/* 32 FP registers, fsr, fir, fp. Not yet implemented. */
ths
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18 years ago
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/* what's 'fp' mean here? */
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return ptr - mem_buf ;
}
ths
authored
18 years ago
591
592
593
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601
/* 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 \
set_float_rounding_mode ( ieee_rm [ env -> fcr31 & 3 ], & env -> fp_status )
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
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 ++ )
{
env -> gpr [ i ] = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
}
env -> CP0_Status = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
env -> LO = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
env -> HI = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
env -> CP0_BadVAddr = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
env -> CP0_Cause = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
env -> PC = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
ths
authored
18 years ago
631
632
633
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635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
# ifdef MIPS_USES_FPU
for ( i = 0 ; i < 32 ; i ++ )
{
FPR_W ( env , i ) = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
}
env -> fcr31 = tswapl ( * ( uint32_t * ) ptr ) & 0x0183FFFF ;
ptr += 4 ;
env -> fcr0 = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
/* set rounding mode */
RESTORE_ROUNDING_MODE ;
# ifndef CONFIG_SOFTFLOAT
/* no floating point exception for native float */
SET_FP_ENABLE ( env -> fcr31 , 0 );
# endif
# endif
653
}
654
655
656
657
658
659
660
# elif defined ( TARGET_SH4 )
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 )
661
662
663
664
665
666
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 ]);
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
SAVE ( env -> pc );
SAVE ( env -> pr );
SAVE ( env -> gbr );
SAVE ( env -> vbr );
SAVE ( env -> mach );
SAVE ( env -> macl );
SAVE ( env -> sr );
SAVE ( 0 ); /* TICKS */
SAVE ( 0 ); /* STALLS */
SAVE ( 0 ); /* CYCLES */
SAVE ( 0 ); /* INSTS */
SAVE ( 0 ); /* PLR */
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 ++ ;
689
690
691
692
693
694
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 ]);
695
696
697
698
699
700
701
702
LOAD ( env -> pc );
LOAD ( env -> pr );
LOAD ( env -> gbr );
LOAD ( env -> vbr );
LOAD ( env -> mach );
LOAD ( env -> macl );
LOAD ( env -> sr );
}
703
# else
704
705
706
707
708
709
710
711
712
713
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
714
715
static int gdb_handle_packet ( GDBState * s , CPUState * env , const char * line_buf )
716
717
{
const char * p ;
718
int ch , reg_size , type ;
719
720
721
char buf [ 4096 ];
uint8_t mem_buf [ 2000 ];
uint32_t * registers ;
722
target_ulong addr , len ;
723
724
725
726
727
728
729
730
# ifdef DEBUG_GDB
printf ( "command='%s' \n " , line_buf );
# endif
p = line_buf ;
ch = * p ++ ;
switch ( ch ) {
case '?' :
731
/* TODO: Make this return the correct value for user-mode. */
732
733
734
735
736
snprintf ( buf , sizeof ( buf ), "S%02x" , SIGTRAP );
put_packet ( s , buf );
break ;
case 'c' :
if ( * p != '\0' ) {
737
addr = strtoull ( p , ( char ** ) & p , 16 );
738
# if defined ( TARGET_I386 )
739
env -> eip = addr ;
740
# elif defined ( TARGET_PPC )
741
env -> nip = addr ;
742
743
744
# elif defined ( TARGET_SPARC )
env -> pc = addr ;
env -> npc = addr + 4 ;
745
746
# elif defined ( TARGET_ARM )
env -> regs [ 15 ] = addr ;
747
748
# elif defined ( TARGET_SH4 )
env -> pc = addr ;
749
# endif
750
}
751
752
753
754
755
756
# ifdef CONFIG_USER_ONLY
s -> running_state = 1 ;
# else
vm_start ();
# endif
return RS_IDLE ;
757
758
759
case 's' :
if ( * p != '\0' ) {
addr = strtoul ( p , ( char ** ) & p , 16 );
760
# if defined ( TARGET_I386 )
761
env -> eip = addr ;
762
# elif defined ( TARGET_PPC )
763
env -> nip = addr ;
764
765
766
# elif defined ( TARGET_SPARC )
env -> pc = addr ;
env -> npc = addr + 4 ;
767
768
# elif defined ( TARGET_ARM )
env -> regs [ 15 ] = addr ;
769
770
# elif defined ( TARGET_SH4 )
env -> pc = addr ;
771
# endif
772
773
}
cpu_single_step ( env , 1 );
774
775
776
777
778
779
# ifdef CONFIG_USER_ONLY
s -> running_state = 1 ;
# else
vm_start ();
# endif
return RS_IDLE ;
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
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 {
# ifdef CONFIG_USER_ONLY
s -> running_state = 1 ;
# else
vm_start ();
# endif
}
}
break ;
808
809
810
811
812
813
814
815
816
817
818
819
820
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' :
821
addr = strtoull ( p , ( char ** ) & p , 16 );
822
823
if ( * p == ',' )
p ++ ;
824
len = strtoull ( p , NULL , 16 );
825
826
827
828
829
830
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 );
}
831
832
break ;
case 'M' :
833
addr = strtoull ( p , ( char ** ) & p , 16 );
834
835
if ( * p == ',' )
p ++ ;
836
len = strtoull ( p , ( char ** ) & p , 16 );
837
if ( * p == ':' )
838
839
840
p ++ ;
hextomem ( mem_buf , p , len );
if ( cpu_memory_rw_debug ( env , addr , mem_buf , len , 1 ) != 0 )
841
put_packet ( s , "E14" );
842
843
844
845
846
847
848
else
put_packet ( s , "OK" );
break ;
case 'Z' :
type = strtoul ( p , ( char ** ) & p , 16 );
if ( * p == ',' )
p ++ ;
849
addr = strtoull ( p , ( char ** ) & p , 16 );
850
851
if ( * p == ',' )
p ++ ;
852
len = strtoull ( p , ( char ** ) & p , 16 );
853
854
855
856
857
858
if ( type == 0 || type == 1 ) {
if ( cpu_breakpoint_insert ( env , addr ) < 0 )
goto breakpoint_error ;
put_packet ( s , "OK" );
} else {
breakpoint_error :
859
put_packet ( s , "E22" );
860
861
862
863
864
865
}
break ;
case 'z' :
type = strtoul ( p , ( char ** ) & p , 16 );
if ( * p == ',' )
p ++ ;
866
addr = strtoull ( p , ( char ** ) & p , 16 );
867
868
if ( * p == ',' )
p ++ ;
869
len = strtoull ( p , ( char ** ) & p , 16 );
870
871
872
873
874
875
876
if ( type == 0 || type == 1 ) {
cpu_breakpoint_remove ( env , addr );
put_packet ( s , "OK" );
} else {
goto breakpoint_error ;
}
break ;
ths
authored
18 years ago
877
# ifdef CONFIG_LINUX_USER
878
879
880
881
882
883
884
885
886
887
888
case 'q' :
if ( strncmp ( p , "Offsets" , 7 ) == 0 ) {
TaskState * ts = env -> opaque ;
sprintf ( buf , "Text=%x;Data=%x;Bss=%x" , ts -> info -> code_offset ,
ts -> info -> data_offset , ts -> info -> data_offset );
put_packet ( s , buf );
break ;
}
/* Fall through. */
# endif
889
890
891
892
893
894
895
896
897
898
default :
// unknown_command :
/* put empty packet */
buf [ 0 ] = '\0' ;
put_packet ( s , buf );
break ;
}
return RS_IDLE ;
}
899
900
extern void tb_flush ( CPUState * env );
901
# ifndef CONFIG_USER_ONLY
902
903
904
905
906
907
static void gdb_vm_stopped ( void * opaque , int reason )
{
GDBState * s = opaque ;
char buf [ 256 ];
int ret ;
908
909
910
if ( s -> state == RS_SYSCALL )
return ;
911
/* disable single step if it was enable */
912
cpu_single_step ( s -> env , 0 );
913
914
if ( reason == EXCP_DEBUG ) {
915
tb_flush ( s -> env );
916
ret = SIGTRAP ;
917
918
919
} else if ( reason == EXCP_INTERRUPT ) {
ret = SIGINT ;
} else {
920
ret = 0 ;
921
}
922
923
924
snprintf ( buf , sizeof ( buf ), "S%02x" , ret );
put_packet ( s , buf );
}
925
# endif
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
/* Send a gdb syscall request .
This accepts limited printf - style format specifiers , specifically :
% x - target_ulong argument printed in hex .
% s - string pointer ( target_ulong ) and length ( int ) pair . */
void gdb_do_syscall ( gdb_syscall_complete_cb cb , char * fmt , ...)
{
va_list va ;
char buf [ 256 ];
char * p ;
target_ulong addr ;
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 ;
case 's' :
addr = va_arg ( va , target_ulong );
p += sprintf ( p , TARGET_FMT_lx "/%x" , addr , va_arg ( va , int ));
break ;
default :
fprintf ( stderr , "gdbstub: Bad syscall format string '%s' \n " ,
fmt - 1 );
break ;
}
} else {
* ( p ++ ) = * ( fmt ++ );
}
}
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
}
981
static void gdb_read_byte ( GDBState * s , int ch )
982
{
983
CPUState * env = s -> env ;
984
985
986
int i , csum ;
char reply [ 1 ];
987
# ifndef CONFIG_USER_ONLY
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
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
put_buffer ( s , s -> last_packet , s -> last_packet_len );
}
# 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 != '$' )
return ;
}
1008
1009
1010
1011
if ( vm_running ) {
/* when the CPU is running , we cannot do anything except stop
it when receiving a char */
vm_stop ( EXCP_INTERRUPT );
1012
} else
1013
# endif
1014
{
1015
1016
1017
1018
1019
switch ( s -> state ) {
case RS_IDLE :
if ( ch == '$' ) {
s -> line_buf_index = 0 ;
s -> state = RS_GETLINE ;
1020
}
1021
break ;
1022
1023
1024
1025
1026
case RS_GETLINE :
if ( ch == '#' ) {
s -> state = RS_CHKSUM1 ;
} else if ( s -> line_buf_index >= sizeof ( s -> line_buf ) - 1 ) {
s -> state = RS_IDLE ;
1027
} else {
1028
s -> line_buf [ s -> line_buf_index ++ ] = ch ;
1029
1030
}
break ;
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
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 )) {
reply [ 0 ] = '-' ;
put_buffer ( s , reply , 1 );
s -> state = RS_IDLE ;
1046
} else {
1047
1048
reply [ 0 ] = '+' ;
put_buffer ( s , reply , 1 );
1049
s -> state = gdb_handle_packet ( s , env , s -> line_buf );
1050
1051
}
break ;
1052
1053
default :
abort ();
1054
1055
1056
1057
}
}
}
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
# ifdef CONFIG_USER_ONLY
int
gdb_handlesig ( CPUState * env , int sig )
{
GDBState * s ;
char buf [ 256 ];
int n ;
if ( gdbserver_fd < 0 )
return sig ;
s = & gdbserver_state ;
/* 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 );
}
sig = 0 ;
s -> state = RS_IDLE ;
1083
1084
s -> running_state = 0 ;
while ( s -> running_state == 0 ) {
1085
1086
1087
1088
1089
1090
n = read ( s -> fd , buf , 256 );
if ( n > 0 )
{
int i ;
for ( i = 0 ; i < n ; i ++ )
1091
gdb_read_byte ( s , buf [ i ]);
1092
1093
1094
1095
1096
1097
1098
}
else if ( n == 0 || errno != EAGAIN )
{
/* XXX : Connection closed . Should probably wait for annother
connection before continuing . */
return sig ;
}
1099
}
1100
1101
return sig ;
}
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
/* Tell the remote gdb that the process has exited. */
void gdb_exit ( CPUState * env , int code )
{
GDBState * s ;
char buf [ 4 ];
if ( gdbserver_fd < 0 )
return ;
s = & gdbserver_state ;
snprintf ( buf , sizeof ( buf ), "W%02x" , code );
put_packet ( s , buf );
}
1118
1119
static void gdb_accept ( void * opaque )
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
{
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 ) {
1133
1134
1135
break ;
}
}
1136
1137
1138
/* set short latency */
val = 1 ;
1139
setsockopt ( fd , IPPROTO_TCP , TCP_NODELAY , ( char * ) & val , sizeof ( val ));
1140
1141
1142
s = & gdbserver_state ;
memset ( s , 0 , sizeof ( GDBState ));
1143
s -> env = first_cpu ; /* XXX: allow to change CPU */
1144
1145
s -> fd = fd ;
1146
1147
gdb_syscall_state = s ;
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
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 ;
1164
setsockopt ( fd , SOL_SOCKET , SO_REUSEADDR , ( char * ) & val , sizeof ( val ));
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
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 */
1188
gdb_accept ( NULL );
1189
1190
return 0 ;
}
1191
# else
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
static int gdb_chr_can_recieve ( void * opaque )
{
return 1 ;
}
static void gdb_chr_recieve ( void * opaque , const uint8_t * buf , int size )
{
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 );
1212
gdb_syscall_state = opaque ;
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
break ;
default :
break ;
}
}
int gdbserver_start ( CharDriverState * chr )
{
GDBState * s ;
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 ;
qemu_chr_add_handlers ( chr , gdb_chr_can_recieve , gdb_chr_recieve ,
gdb_chr_event , s );
qemu_add_vm_stop_handler ( gdb_vm_stopped , s );
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return 0 ;
}
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int gdbserver_start_port ( int port )
{
CharDriverState * chr ;
char gdbstub_port_name [ 128 ];
snprintf ( gdbstub_port_name , sizeof ( gdbstub_port_name ),
"tcp::%d,nowait,nodelay,server" , port );
chr = qemu_chr_open ( gdbstub_port_name );
if ( ! chr )
return - EIO ;
return gdbserver_start ( chr );
}
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# endif