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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 ( 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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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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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). */
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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 ++ )
{
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* ( target_ulong * ) ptr = tswapl ( env -> gpr [ i ]);
ptr += sizeof ( target_ulong );
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}
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* ( target_ulong * ) ptr = tswapl ( env -> CP0_Status );
ptr += sizeof ( target_ulong );
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* ( target_ulong * ) ptr = tswapl ( env -> LO );
ptr += sizeof ( target_ulong );
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* ( target_ulong * ) ptr = tswapl ( env -> HI );
ptr += sizeof ( target_ulong );
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* ( target_ulong * ) ptr = tswapl ( env -> CP0_BadVAddr );
ptr += sizeof ( target_ulong );
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* ( target_ulong * ) ptr = tswapl ( env -> CP0_Cause );
ptr += sizeof ( target_ulong );
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* ( target_ulong * ) ptr = tswapl ( env -> PC );
ptr += sizeof ( target_ulong );
583
ths
authored
18 years ago
584
if ( env -> CP0_Config1 & ( 1 << CP0C1_FP ))
ths
authored
18 years ago
585
{
ths
authored
18 years ago
586
587
for ( i = 0 ; i < 32 ; i ++ )
{
ths
authored
18 years ago
588
589
* ( target_ulong * ) ptr = tswapl ( env -> fpr [ i ]. fs [ FP_ENDIAN_IDX ]);
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
590
}
ths
authored
18 years ago
591
ths
authored
18 years ago
592
593
* ( target_ulong * ) ptr = tswapl ( env -> fcr31 );
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
594
ths
authored
18 years ago
595
596
* ( target_ulong * ) ptr = tswapl ( env -> fcr0 );
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
597
}
ths
authored
18 years ago
598
599
/* 32 FP registers, fsr, fir, fp. Not yet implemented. */
ths
authored
18 years ago
600
/* what's 'fp' mean here? */
601
602
603
604
return ptr - mem_buf ;
}
ths
authored
18 years ago
605
606
607
608
609
610
611
612
613
614
615
/* 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 )
616
617
618
619
620
621
622
623
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
18 years ago
624
625
env -> gpr [ i ] = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
626
627
}
ths
authored
18 years ago
628
629
env -> CP0_Status = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
630
ths
authored
18 years ago
631
632
env -> LO = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
633
ths
authored
18 years ago
634
635
env -> HI = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
636
ths
authored
18 years ago
637
638
env -> CP0_BadVAddr = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
639
ths
authored
18 years ago
640
641
env -> CP0_Cause = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
642
ths
authored
18 years ago
643
644
env -> PC = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
645
ths
authored
18 years ago
646
if ( env -> CP0_Config1 & ( 1 << CP0C1_FP ))
ths
authored
18 years ago
647
{
ths
authored
18 years ago
648
649
for ( i = 0 ; i < 32 ; i ++ )
{
ths
authored
18 years ago
650
651
env -> fpr [ i ]. fs [ FP_ENDIAN_IDX ] = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
652
}
ths
authored
18 years ago
653
ths
authored
18 years ago
654
655
env -> fcr31 = tswapl ( * ( target_ulong * ) ptr ) & 0x0183FFFF ;
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
656
ths
authored
18 years ago
657
658
env -> fcr0 = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
659
ths
authored
18 years ago
660
661
/* set rounding mode */
RESTORE_ROUNDING_MODE ;
ths
authored
18 years ago
662
663
# ifndef CONFIG_SOFTFLOAT
ths
authored
18 years ago
664
665
/* no floating point exception for native float */
SET_FP_ENABLE ( env -> fcr31 , 0 );
ths
authored
18 years ago
666
# endif
ths
authored
18 years ago
667
}
668
}
669
# elif defined ( TARGET_SH4 )
ths
authored
18 years ago
670
671
672
/* Hint: Use "set architecture sh4" in GDB to see fpu registers */
673
674
675
676
677
678
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 )
679
680
681
682
683
684
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 ]);
685
686
687
688
689
690
691
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
692
693
694
695
696
697
698
699
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 ]);
700
701
702
703
704
705
706
707
708
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 ++ ;
709
710
711
712
713
714
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 ]);
715
716
717
718
719
720
721
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
722
723
724
725
726
727
728
729
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 ]);
730
}
731
# else
732
733
734
735
736
737
738
739
740
741
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
742
743
static int gdb_handle_packet ( GDBState * s , CPUState * env , const char * line_buf )
744
745
{
const char * p ;
746
int ch , reg_size , type ;
747
748
749
char buf [ 4096 ];
uint8_t mem_buf [ 2000 ];
uint32_t * registers ;
750
target_ulong addr , len ;
751
752
753
754
755
756
757
758
# ifdef DEBUG_GDB
printf ( "command='%s' \n " , line_buf );
# endif
p = line_buf ;
ch = * p ++ ;
switch ( ch ) {
case '?' :
759
/* TODO: Make this return the correct value for user-mode. */
760
761
762
763
764
snprintf ( buf , sizeof ( buf ), "S%02x" , SIGTRAP );
put_packet ( s , buf );
break ;
case 'c' :
if ( * p != '\0' ) {
765
addr = strtoull ( p , ( char ** ) & p , 16 );
766
# if defined ( TARGET_I386 )
767
env -> eip = addr ;
768
# elif defined ( TARGET_PPC )
769
env -> nip = addr ;
770
771
772
# elif defined ( TARGET_SPARC )
env -> pc = addr ;
env -> npc = addr + 4 ;
773
774
# elif defined ( TARGET_ARM )
env -> regs [ 15 ] = addr ;
775
# elif defined ( TARGET_SH4 )
ths
authored
18 years ago
776
777
778
env -> pc = addr ;
# elif defined ( TARGET_MIPS )
env -> PC = addr ;
779
# endif
780
}
781
782
783
784
785
786
# ifdef CONFIG_USER_ONLY
s -> running_state = 1 ;
# else
vm_start ();
# endif
return RS_IDLE ;
787
788
case 's' :
if ( * p != '\0' ) {
ths
authored
18 years ago
789
addr = strtoull ( p , ( char ** ) & p , 16 );
790
# if defined ( TARGET_I386 )
791
env -> eip = addr ;
792
# elif defined ( TARGET_PPC )
793
env -> nip = addr ;
794
795
796
# elif defined ( TARGET_SPARC )
env -> pc = addr ;
env -> npc = addr + 4 ;
797
798
# elif defined ( TARGET_ARM )
env -> regs [ 15 ] = addr ;
799
# elif defined ( TARGET_SH4 )
ths
authored
18 years ago
800
801
802
env -> pc = addr ;
# elif defined ( TARGET_MIPS )
env -> PC = addr ;
803
# endif
804
805
}
cpu_single_step ( env , 1 );
806
807
808
809
810
811
# ifdef CONFIG_USER_ONLY
s -> running_state = 1 ;
# else
vm_start ();
# endif
return RS_IDLE ;
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
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 ;
840
841
842
843
844
845
846
847
848
849
850
851
852
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' :
853
addr = strtoull ( p , ( char ** ) & p , 16 );
854
855
if ( * p == ',' )
p ++ ;
856
len = strtoull ( p , NULL , 16 );
857
858
859
860
861
862
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 );
}
863
864
break ;
case 'M' :
865
addr = strtoull ( p , ( char ** ) & p , 16 );
866
867
if ( * p == ',' )
p ++ ;
868
len = strtoull ( p , ( char ** ) & p , 16 );
869
if ( * p == ':' )
870
871
872
p ++ ;
hextomem ( mem_buf , p , len );
if ( cpu_memory_rw_debug ( env , addr , mem_buf , len , 1 ) != 0 )
873
put_packet ( s , "E14" );
874
875
876
877
878
879
880
else
put_packet ( s , "OK" );
break ;
case 'Z' :
type = strtoul ( p , ( char ** ) & p , 16 );
if ( * p == ',' )
p ++ ;
881
addr = strtoull ( p , ( char ** ) & p , 16 );
882
883
if ( * p == ',' )
p ++ ;
884
len = strtoull ( p , ( char ** ) & p , 16 );
885
886
887
888
if ( type == 0 || type == 1 ) {
if ( cpu_breakpoint_insert ( env , addr ) < 0 )
goto breakpoint_error ;
put_packet ( s , "OK" );
889
890
891
892
893
894
# ifndef CONFIG_USER_ONLY
} else if ( type == 2 ) {
if ( cpu_watchpoint_insert ( env , addr ) < 0 )
goto breakpoint_error ;
put_packet ( s , "OK" );
# endif
895
896
} else {
breakpoint_error :
897
put_packet ( s , "E22" );
898
899
900
901
902
903
}
break ;
case 'z' :
type = strtoul ( p , ( char ** ) & p , 16 );
if ( * p == ',' )
p ++ ;
904
addr = strtoull ( p , ( char ** ) & p , 16 );
905
906
if ( * p == ',' )
p ++ ;
907
len = strtoull ( p , ( char ** ) & p , 16 );
908
909
910
if ( type == 0 || type == 1 ) {
cpu_breakpoint_remove ( env , addr );
put_packet ( s , "OK" );
911
912
913
914
915
# ifndef CONFIG_USER_ONLY
} else if ( type == 2 ) {
cpu_watchpoint_remove ( env , addr );
put_packet ( s , "OK" );
# endif
916
917
918
919
} else {
goto breakpoint_error ;
}
break ;
ths
authored
18 years ago
920
# ifdef CONFIG_LINUX_USER
921
922
923
924
case 'q' :
if ( strncmp ( p , "Offsets" , 7 ) == 0 ) {
TaskState * ts = env -> opaque ;
ths
authored
18 years ago
925
926
927
928
929
sprintf ( buf ,
"Text=" TARGET_FMT_lx ";Data=" TARGET_FMT_lx ";Bss=" TARGET_FMT_lx ,
ts -> info -> code_offset ,
ts -> info -> data_offset ,
ts -> info -> data_offset );
930
931
932
933
934
put_packet ( s , buf );
break ;
}
/* Fall through. */
# endif
935
936
937
938
939
940
941
942
943
944
default :
// unknown_command :
/* put empty packet */
buf [ 0 ] = '\0' ;
put_packet ( s , buf );
break ;
}
return RS_IDLE ;
}
945
946
extern void tb_flush ( CPUState * env );
947
# ifndef CONFIG_USER_ONLY
948
949
950
951
952
953
static void gdb_vm_stopped ( void * opaque , int reason )
{
GDBState * s = opaque ;
char buf [ 256 ];
int ret ;
954
955
956
if ( s -> state == RS_SYSCALL )
return ;
957
/* disable single step if it was enable */
958
cpu_single_step ( s -> env , 0 );
959
960
if ( reason == EXCP_DEBUG ) {
961
if ( s -> env -> watchpoint_hit ) {
962
963
snprintf ( buf , sizeof ( buf ), "T%02xwatch:" TARGET_FMT_lx ";" ,
SIGTRAP ,
964
965
966
967
968
s -> env -> watchpoint [ s -> env -> watchpoint_hit - 1 ]. vaddr );
put_packet ( s , buf );
s -> env -> watchpoint_hit = 0 ;
return ;
}
969
tb_flush ( s -> env );
970
ret = SIGTRAP ;
971
972
973
} else if ( reason == EXCP_INTERRUPT ) {
ret = SIGINT ;
} else {
974
ret = 0 ;
975
}
976
977
978
snprintf ( buf , sizeof ( buf ), "S%02x" , ret );
put_packet ( s , buf );
}
979
# endif
980
981
982
/* Send a gdb syscall request .
This accepts limited printf - style format specifiers , specifically :
983
984
985
% x - target_ulong argument printed in hex .
% lx - 64 - bit argument printed in hex .
% s - string pointer ( target_ulong ) and length ( int ) pair . */
986
987
988
989
990
991
void gdb_do_syscall ( gdb_syscall_complete_cb cb , char * fmt , ...)
{
va_list va ;
char buf [ 256 ];
char * p ;
target_ulong addr ;
992
uint64_t i64 ;
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
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 ;
1015
1016
1017
1018
1019
1020
case 'l' :
if ( * ( fmt ++ ) != 'x' )
goto bad_format ;
i64 = va_arg ( va , uint64_t );
p += sprintf ( p , "%" PRIx64 , i64 );
break ;
1021
1022
1023
1024
1025
case 's' :
addr = va_arg ( va , target_ulong );
p += sprintf ( p , TARGET_FMT_lx "/%x" , addr , va_arg ( va , int ));
break ;
default :
1026
bad_format :
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
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
}
1044
static void gdb_read_byte ( GDBState * s , int ch )
1045
{
1046
CPUState * env = s -> env ;
1047
1048
1049
int i , csum ;
char reply [ 1 ];
1050
# ifndef CONFIG_USER_ONLY
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
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 != '$' )
return ;
}
1071
1072
1073
1074
if ( vm_running ) {
/* when the CPU is running , we cannot do anything except stop
it when receiving a char */
vm_stop ( EXCP_INTERRUPT );
1075
} else
1076
# endif
1077
{
1078
1079
1080
1081
1082
switch ( s -> state ) {
case RS_IDLE :
if ( ch == '$' ) {
s -> line_buf_index = 0 ;
s -> state = RS_GETLINE ;
1083
}
1084
break ;
1085
1086
1087
1088
1089
case RS_GETLINE :
if ( ch == '#' ) {
s -> state = RS_CHKSUM1 ;
} else if ( s -> line_buf_index >= sizeof ( s -> line_buf ) - 1 ) {
s -> state = RS_IDLE ;
1090
} else {
1091
s -> line_buf [ s -> line_buf_index ++ ] = ch ;
1092
1093
}
break ;
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
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 ;
1109
} else {
1110
1111
reply [ 0 ] = '+' ;
put_buffer ( s , reply , 1 );
1112
s -> state = gdb_handle_packet ( s , env , s -> line_buf );
1113
1114
}
break ;
1115
1116
default :
abort ();
1117
1118
1119
1120
}
}
}
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
# 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 ;
1146
1147
s -> running_state = 0 ;
while ( s -> running_state == 0 ) {
1148
1149
1150
1151
1152
1153
n = read ( s -> fd , buf , 256 );
if ( n > 0 )
{
int i ;
for ( i = 0 ; i < n ; i ++ )
1154
gdb_read_byte ( s , buf [ i ]);
1155
1156
1157
1158
1159
1160
1161
}
else if ( n == 0 || errno != EAGAIN )
{
/* XXX : Connection closed . Should probably wait for annother
connection before continuing . */
return sig ;
}
1162
}
1163
1164
return sig ;
}
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
/* 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 );
}
1181
1182
static void gdb_accept ( void * opaque )
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
{
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 ) {
1196
1197
1198
break ;
}
}
1199
1200
1201
/* set short latency */
val = 1 ;
1202
setsockopt ( fd , IPPROTO_TCP , TCP_NODELAY , ( char * ) & val , sizeof ( val ));
1203
1204
1205
s = & gdbserver_state ;
memset ( s , 0 , sizeof ( GDBState ));
1206
s -> env = first_cpu ; /* XXX: allow to change CPU */
1207
1208
s -> fd = fd ;
1209
1210
gdb_syscall_state = s ;
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
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 ;
1227
setsockopt ( fd , SOL_SOCKET , SO_REUSEADDR , ( char * ) & val , sizeof ( val ));
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
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 */
1251
gdb_accept ( NULL );
1252
1253
return 0 ;
}
1254
# else
ths
authored
18 years ago
1255
static int gdb_chr_can_receive ( void * opaque )
1256
1257
1258
1259
{
return 1 ;
}
ths
authored
18 years ago
1260
static void gdb_chr_receive ( void * opaque , const uint8_t * buf , int size )
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
{
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 );
1275
gdb_syscall_state = opaque ;
1276
1277
1278
1279
1280
1281
break ;
default :
break ;
}
}
1282
int gdbserver_start ( const char * port )
1283
1284
{
GDBState * s ;
1285
1286
1287
1288
1289
1290
1291
char gdbstub_port_name [ 128 ];
int port_num ;
char * p ;
CharDriverState * chr ;
if ( ! port || !* port )
return - 1 ;
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
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 );
1302
1303
1304
1305
1306
1307
1308
1309
1310
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
1311
qemu_chr_add_handlers ( chr , gdb_chr_can_receive , gdb_chr_receive ,
1312
1313
gdb_chr_event , s );
qemu_add_vm_stop_handler ( gdb_vm_stopped , s );
1314
1315
return 0 ;
}
1316
# endif