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/*
* gdb server stub
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authored
18 years ago
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*
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* Copyright ( c ) 2003 - 2005 Fabrice Bellard
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*
* This library is free software ; you can redistribute it and / or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation ; either
* version 2 of the License , or ( at your option ) any later version .
*
* This library is distributed in the hope that it will be useful ,
* but WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the GNU
* Lesser General Public License for more details .
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library ; if not , write to the Free Software
* 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 )
{
int i , fpus ;
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uint32_t * registers = ( uint32_t * ) mem_buf ;
# ifdef TARGET_X86_64
/* This corresponds with amd64_register_info[] in gdb/amd64-tdep.c */
uint64_t * registers64 = ( uint64_t * ) mem_buf ;
if ( env -> hflags & HF_CS64_MASK ) {
registers64 [ 0 ] = tswap64 ( env -> regs [ R_EAX ]);
registers64 [ 1 ] = tswap64 ( env -> regs [ R_EBX ]);
registers64 [ 2 ] = tswap64 ( env -> regs [ R_ECX ]);
registers64 [ 3 ] = tswap64 ( env -> regs [ R_EDX ]);
registers64 [ 4 ] = tswap64 ( env -> regs [ R_ESI ]);
registers64 [ 5 ] = tswap64 ( env -> regs [ R_EDI ]);
registers64 [ 6 ] = tswap64 ( env -> regs [ R_EBP ]);
registers64 [ 7 ] = tswap64 ( env -> regs [ R_ESP ]);
for ( i = 8 ; i < 16 ; i ++ ) {
registers64 [ i ] = tswap64 ( env -> regs [ i ]);
}
registers64 [ 16 ] = tswap64 ( env -> eip );
registers = ( uint32_t * ) & registers64 [ 17 ];
registers [ 0 ] = tswap32 ( env -> eflags );
registers [ 1 ] = tswap32 ( env -> segs [ R_CS ]. selector );
registers [ 2 ] = tswap32 ( env -> segs [ R_SS ]. selector );
registers [ 3 ] = tswap32 ( env -> segs [ R_DS ]. selector );
registers [ 4 ] = tswap32 ( env -> segs [ R_ES ]. selector );
registers [ 5 ] = tswap32 ( env -> segs [ R_FS ]. selector );
registers [ 6 ] = tswap32 ( env -> segs [ R_GS ]. selector );
/* XXX: convert floats */
for ( i = 0 ; i < 8 ; i ++ ) {
memcpy ( mem_buf + 16 * 8 + 7 * 4 + i * 10 , & env -> fpregs [ i ], 10 );
}
registers [ 27 ] = tswap32 ( env -> fpuc ); /* fctrl */
fpus = ( env -> fpus & ~ 0x3800 ) | ( env -> fpstt & 0x7 ) << 11 ;
registers [ 28 ] = tswap32 ( fpus ); /* fstat */
registers [ 29 ] = 0 ; /* ftag */
registers [ 30 ] = 0 ; /* fiseg */
registers [ 31 ] = 0 ; /* fioff */
registers [ 32 ] = 0 ; /* foseg */
registers [ 33 ] = 0 ; /* fooff */
registers [ 34 ] = 0 ; /* fop */
for ( i = 0 ; i < 16 ; i ++ ) {
memcpy ( mem_buf + 16 * 8 + 35 * 4 + i * 16 , & env -> xmm_regs [ i ], 16 );
}
registers [ 99 ] = tswap32 ( env -> mxcsr );
return 8 * 17 + 4 * 7 + 10 * 8 + 4 * 8 + 16 * 16 + 4 ;
}
# endif
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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 */
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authored
18 years ago
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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 ( 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). */
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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 ++ ) {
ths
authored
18 years ago
594
u . l . upper = tswap32 ( * ( uint32_t * ) ptr );
595
596
597
598
599
600
u . l . lower = tswap32 ( * ( uint32_t * ) ptr );
env -> fregs [ i ] = u . d ;
}
/* FP control regs (not implemented). */
ptr += 3 * 4 ;
}
601
602
603
604
605
606
607
608
609
# 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
18 years ago
610
* ( target_ulong * ) ptr = tswapl ( env -> gpr [ i ][ env -> current_tc ]);
ths
authored
18 years ago
611
ptr += sizeof ( target_ulong );
612
613
}
ths
authored
17 years ago
614
* ( target_ulong * ) ptr = ( int32_t ) tswap32 ( env -> CP0_Status );
ths
authored
18 years ago
615
ptr += sizeof ( target_ulong );
616
ths
authored
18 years ago
617
* ( target_ulong * ) ptr = tswapl ( env -> LO [ 0 ][ env -> current_tc ]);
ths
authored
18 years ago
618
ptr += sizeof ( target_ulong );
619
ths
authored
18 years ago
620
* ( target_ulong * ) ptr = tswapl ( env -> HI [ 0 ][ env -> current_tc ]);
ths
authored
18 years ago
621
ptr += sizeof ( target_ulong );
622
ths
authored
18 years ago
623
624
* ( target_ulong * ) ptr = tswapl ( env -> CP0_BadVAddr );
ptr += sizeof ( target_ulong );
625
ths
authored
17 years ago
626
* ( target_ulong * ) ptr = ( int32_t ) tswap32 ( env -> CP0_Cause );
ths
authored
18 years ago
627
ptr += sizeof ( target_ulong );
628
ths
authored
18 years ago
629
* ( target_ulong * ) ptr = tswapl ( env -> PC [ env -> current_tc ]);
ths
authored
18 years ago
630
ptr += sizeof ( target_ulong );
631
ths
authored
18 years ago
632
if ( env -> CP0_Config1 & ( 1 << CP0C1_FP ))
ths
authored
18 years ago
633
{
ths
authored
18 years ago
634
635
for ( i = 0 ; i < 32 ; i ++ )
{
ths
authored
17 years ago
636
637
638
639
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
authored
18 years ago
640
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
641
}
ths
authored
18 years ago
642
ths
authored
17 years ago
643
* ( target_ulong * ) ptr = ( int32_t ) tswap32 ( env -> fpu -> fcr31 );
ths
authored
18 years ago
644
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
645
ths
authored
17 years ago
646
* ( target_ulong * ) ptr = ( int32_t ) tswap32 ( env -> fpu -> fcr0 );
ths
authored
18 years ago
647
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
648
}
ths
authored
18 years ago
649
ths
authored
17 years ago
650
651
652
653
654
655
656
657
658
659
660
661
662
663
/* "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 );
664
665
666
667
return ptr - mem_buf ;
}
ths
authored
18 years ago
668
669
670
671
672
673
674
675
676
/* 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
677
set_float_rounding_mode ( ieee_rm [ env -> fpu -> fcr31 & 3 ], & env -> fpu -> fp_status )
ths
authored
18 years ago
678
679
680
681
682
683
684
685
686
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
687
env -> gpr [ i ][ env -> current_tc ] = tswapl ( * ( target_ulong * ) ptr );
ths
authored
18 years ago
688
ptr += sizeof ( target_ulong );
689
690
}
ths
authored
18 years ago
691
692
env -> CP0_Status = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
693
ths
authored
18 years ago
694
env -> LO [ 0 ][ env -> current_tc ] = tswapl ( * ( target_ulong * ) ptr );
ths
authored
18 years ago
695
ptr += sizeof ( target_ulong );
696
ths
authored
18 years ago
697
env -> HI [ 0 ][ env -> current_tc ] = tswapl ( * ( target_ulong * ) ptr );
ths
authored
18 years ago
698
ptr += sizeof ( target_ulong );
699
ths
authored
18 years ago
700
701
env -> CP0_BadVAddr = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
702
ths
authored
18 years ago
703
704
env -> CP0_Cause = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
705
ths
authored
18 years ago
706
env -> PC [ env -> current_tc ] = tswapl ( * ( target_ulong * ) ptr );
ths
authored
18 years ago
707
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
708
ths
authored
18 years ago
709
if ( env -> CP0_Config1 & ( 1 << CP0C1_FP ))
ths
authored
18 years ago
710
{
ths
authored
18 years ago
711
712
for ( i = 0 ; i < 32 ; i ++ )
{
ths
authored
17 years ago
713
714
715
716
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
authored
18 years ago
717
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
718
}
ths
authored
18 years ago
719
ths
authored
17 years ago
720
env -> fpu -> fcr31 = tswapl ( * ( target_ulong * ) ptr ) & 0xFF83FFFF ;
ths
authored
18 years ago
721
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
722
ths
authored
17 years ago
723
/* The remaining registers are assumed to be read-only. */
ths
authored
18 years ago
724
ths
authored
18 years ago
725
726
/* set rounding mode */
RESTORE_ROUNDING_MODE ;
ths
authored
18 years ago
727
728
# ifndef CONFIG_SOFTFLOAT
ths
authored
18 years ago
729
730
/* no floating point exception for native float */
SET_FP_ENABLE ( env -> fcr31 , 0 );
ths
authored
18 years ago
731
# endif
ths
authored
18 years ago
732
}
733
}
734
# elif defined ( TARGET_SH4 )
ths
authored
18 years ago
735
736
737
/* Hint: Use "set architecture sh4" in GDB to see fpu registers */
738
739
740
741
742
743
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 )
744
745
746
747
748
749
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 ]);
750
751
752
753
754
755
756
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
757
758
759
760
761
762
763
764
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 ]);
765
766
767
768
769
770
771
772
773
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 ++ ;
774
775
776
777
778
779
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 ]);
780
781
782
783
784
785
786
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
787
788
789
790
791
792
793
794
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 ]);
795
}
ths
authored
17 years ago
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
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
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
# 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 ]);
srs = env -> pregs [ SR_SRS ];
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 );
}
856
# else
857
858
859
860
861
862
863
864
865
866
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
867
868
static int gdb_handle_packet ( GDBState * s , CPUState * env , const char * line_buf )
869
870
{
const char * p ;
871
int ch , reg_size , type ;
872
char buf [ 4096 ];
ths
authored
17 years ago
873
uint8_t mem_buf [ 4096 ];
874
uint32_t * registers ;
875
target_ulong addr , len ;
ths
authored
18 years ago
876
877
878
879
880
881
882
883
# ifdef DEBUG_GDB
printf ( "command='%s' \n " , line_buf );
# endif
p = line_buf ;
ch = * p ++ ;
switch ( ch ) {
case '?' :
884
/* TODO: Make this return the correct value for user-mode. */
885
886
887
888
889
snprintf ( buf , sizeof ( buf ), "S%02x" , SIGTRAP );
put_packet ( s , buf );
break ;
case 'c' :
if ( * p != '\0' ) {
890
addr = strtoull ( p , ( char ** ) & p , 16 );
891
# if defined ( TARGET_I386 )
892
env -> eip = addr ;
893
# elif defined ( TARGET_PPC )
894
env -> nip = addr ;
895
896
897
# elif defined ( TARGET_SPARC )
env -> pc = addr ;
env -> npc = addr + 4 ;
898
899
# elif defined ( TARGET_ARM )
env -> regs [ 15 ] = addr ;
900
# elif defined ( TARGET_SH4 )
ths
authored
18 years ago
901
902
env -> pc = addr ;
# elif defined ( TARGET_MIPS )
ths
authored
18 years ago
903
env -> PC [ env -> current_tc ] = addr ;
ths
authored
17 years ago
904
905
# elif defined ( TARGET_CRIS )
env -> pc = addr ;
906
# endif
907
}
908
909
910
911
912
913
# ifdef CONFIG_USER_ONLY
s -> running_state = 1 ;
# else
vm_start ();
# endif
return RS_IDLE ;
914
915
case 's' :
if ( * p != '\0' ) {
ths
authored
18 years ago
916
addr = strtoull ( p , ( char ** ) & p , 16 );
917
# if defined ( TARGET_I386 )
918
env -> eip = addr ;
919
# elif defined ( TARGET_PPC )
920
env -> nip = addr ;
921
922
923
# elif defined ( TARGET_SPARC )
env -> pc = addr ;
env -> npc = addr + 4 ;
924
925
# elif defined ( TARGET_ARM )
env -> regs [ 15 ] = addr ;
926
# elif defined ( TARGET_SH4 )
ths
authored
18 years ago
927
928
env -> pc = addr ;
# elif defined ( TARGET_MIPS )
ths
authored
18 years ago
929
env -> PC [ env -> current_tc ] = addr ;
ths
authored
17 years ago
930
931
# elif defined ( TARGET_CRIS )
env -> pc = addr ;
932
# endif
933
934
}
cpu_single_step ( env , 1 );
935
936
937
938
939
940
# ifdef CONFIG_USER_ONLY
s -> running_state = 1 ;
# else
vm_start ();
# endif
return RS_IDLE ;
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
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 ;
969
970
971
972
973
974
975
976
977
978
979
980
981
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' :
982
addr = strtoull ( p , ( char ** ) & p , 16 );
983
984
if ( * p == ',' )
p ++ ;
985
len = strtoull ( p , NULL , 16 );
986
987
988
989
990
991
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 );
}
992
993
break ;
case 'M' :
994
addr = strtoull ( p , ( char ** ) & p , 16 );
995
996
if ( * p == ',' )
p ++ ;
997
len = strtoull ( p , ( char ** ) & p , 16 );
998
if ( * p == ':' )
999
1000
1001
p ++ ;
hextomem ( mem_buf , p , len );
if ( cpu_memory_rw_debug ( env , addr , mem_buf , len , 1 ) != 0 )
1002
put_packet ( s , "E14" );
1003
1004
1005
1006
1007
1008
1009
else
put_packet ( s , "OK" );
break ;
case 'Z' :
type = strtoul ( p , ( char ** ) & p , 16 );
if ( * p == ',' )
p ++ ;
1010
addr = strtoull ( p , ( char ** ) & p , 16 );
1011
1012
if ( * p == ',' )
p ++ ;
1013
len = strtoull ( p , ( char ** ) & p , 16 );
1014
1015
1016
1017
if ( type == 0 || type == 1 ) {
if ( cpu_breakpoint_insert ( env , addr ) < 0 )
goto breakpoint_error ;
put_packet ( s , "OK" );
1018
1019
1020
1021
1022
1023
# ifndef CONFIG_USER_ONLY
} else if ( type == 2 ) {
if ( cpu_watchpoint_insert ( env , addr ) < 0 )
goto breakpoint_error ;
put_packet ( s , "OK" );
# endif
1024
1025
} else {
breakpoint_error :
1026
put_packet ( s , "E22" );
1027
1028
1029
1030
1031
1032
}
break ;
case 'z' :
type = strtoul ( p , ( char ** ) & p , 16 );
if ( * p == ',' )
p ++ ;
1033
addr = strtoull ( p , ( char ** ) & p , 16 );
1034
1035
if ( * p == ',' )
p ++ ;
1036
len = strtoull ( p , ( char ** ) & p , 16 );
1037
1038
1039
if ( type == 0 || type == 1 ) {
cpu_breakpoint_remove ( env , addr );
put_packet ( s , "OK" );
1040
1041
1042
1043
1044
# ifndef CONFIG_USER_ONLY
} else if ( type == 2 ) {
cpu_watchpoint_remove ( env , addr );
put_packet ( s , "OK" );
# endif
1045
1046
1047
1048
} else {
goto breakpoint_error ;
}
break ;
ths
authored
18 years ago
1049
# ifdef CONFIG_LINUX_USER
1050
1051
1052
1053
case 'q' :
if ( strncmp ( p , "Offsets" , 7 ) == 0 ) {
TaskState * ts = env -> opaque ;
ths
authored
18 years ago
1054
sprintf ( buf ,
1055
1056
"Text=" TARGET_ABI_FMT_lx ";Data=" TARGET_ABI_FMT_lx
";Bss=" TARGET_ABI_FMT_lx ,
ths
authored
18 years ago
1057
1058
1059
ts -> info -> code_offset ,
ts -> info -> data_offset ,
ts -> info -> data_offset );
1060
1061
1062
1063
1064
put_packet ( s , buf );
break ;
}
/* Fall through. */
# endif
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
default :
// unknown_command :
/* put empty packet */
buf [ 0 ] = '\0' ;
put_packet ( s , buf );
break ;
}
return RS_IDLE ;
}
1075
1076
extern void tb_flush ( CPUState * env );
1077
# ifndef CONFIG_USER_ONLY
1078
1079
1080
1081
1082
1083
static void gdb_vm_stopped ( void * opaque , int reason )
{
GDBState * s = opaque ;
char buf [ 256 ];
int ret ;
1084
1085
1086
if ( s -> state == RS_SYSCALL )
return ;
1087
/* disable single step if it was enable */
1088
cpu_single_step ( s -> env , 0 );
1089
1090
if ( reason == EXCP_DEBUG ) {
1091
if ( s -> env -> watchpoint_hit ) {
1092
1093
snprintf ( buf , sizeof ( buf ), "T%02xwatch:" TARGET_FMT_lx ";" ,
SIGTRAP ,
1094
1095
1096
1097
1098
s -> env -> watchpoint [ s -> env -> watchpoint_hit - 1 ]. vaddr );
put_packet ( s , buf );
s -> env -> watchpoint_hit = 0 ;
return ;
}
1099
tb_flush ( s -> env );
1100
ret = SIGTRAP ;
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1102
1103
} else if ( reason == EXCP_INTERRUPT ) {
ret = SIGINT ;
} else {
1104
ret = 0 ;
1105
}
1106
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1108
snprintf ( buf , sizeof ( buf ), "S%02x" , ret );
put_packet ( s , buf );
}
1109
# endif
1110
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1112
/* Send a gdb syscall request .
This accepts limited printf - style format specifiers , specifically :
1113
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1115
% x - target_ulong argument printed in hex .
% lx - 64 - bit argument printed in hex .
% s - string pointer ( target_ulong ) and length ( int ) pair . */
1116
1117
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1119
1120
1121
void gdb_do_syscall ( gdb_syscall_complete_cb cb , char * fmt , ...)
{
va_list va ;
char buf [ 256 ];
char * p ;
target_ulong addr ;
1122
uint64_t i64 ;
1123
1124
1125
1126
1127
1128
1129
1130
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1143
1144
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 ;
1145
1146
1147
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1150
case 'l' :
if ( * ( fmt ++ ) != 'x' )
goto bad_format ;
i64 = va_arg ( va , uint64_t );
p += sprintf ( p , "%" PRIx64 , i64 );
break ;
1151
1152
1153
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1155
case 's' :
addr = va_arg ( va , target_ulong );
p += sprintf ( p , TARGET_FMT_lx "/%x" , addr , va_arg ( va , int ));
break ;
default :
1156
bad_format :
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1164
fprintf ( stderr , "gdbstub: Bad syscall format string '%s' \n " ,
fmt - 1 );
break ;
}
} else {
* ( p ++ ) = * ( fmt ++ );
}
}
1165
* p = 0 ;
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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
}
1175
static void gdb_read_byte ( GDBState * s , int ch )
1176
{
1177
CPUState * env = s -> env ;
1178
1179
1180
int i , csum ;
char reply [ 1 ];
1181
# ifndef CONFIG_USER_ONLY
1182
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1201
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 != '$' )
return ;
}
1202
1203
1204
1205
if ( vm_running ) {
/* when the CPU is running , we cannot do anything except stop
it when receiving a char */
vm_stop ( EXCP_INTERRUPT );
ths
authored
18 years ago
1206
} else
1207
# endif
1208
{
1209
1210
1211
1212
1213
switch ( s -> state ) {
case RS_IDLE :
if ( ch == '$' ) {
s -> line_buf_index = 0 ;
s -> state = RS_GETLINE ;
1214
}
1215
break ;
1216
1217
1218
1219
1220
case RS_GETLINE :
if ( ch == '#' ) {
s -> state = RS_CHKSUM1 ;
} else if ( s -> line_buf_index >= sizeof ( s -> line_buf ) - 1 ) {
s -> state = RS_IDLE ;
1221
} else {
1222
s -> line_buf [ s -> line_buf_index ++ ] = ch ;
1223
1224
}
break ;
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
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 ;
1240
} else {
1241
1242
reply [ 0 ] = '+' ;
put_buffer ( s , reply , 1 );
1243
s -> state = gdb_handle_packet ( s , env , s -> line_buf );
1244
1245
}
break ;
1246
1247
default :
abort ();
1248
1249
1250
1251
}
}
}
1252
1253
1254
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1256
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1258
1259
1260
1261
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1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
# 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 ;
1277
1278
s -> running_state = 0 ;
while ( s -> running_state == 0 ) {
1279
1280
1281
1282
1283
1284
n = read ( s -> fd , buf , 256 );
if ( n > 0 )
{
int i ;
for ( i = 0 ; i < n ; i ++ )
1285
gdb_read_byte ( s , buf [ i ]);
1286
1287
1288
1289
1290
1291
1292
}
else if ( n == 0 || errno != EAGAIN )
{
/* XXX : Connection closed . Should probably wait for annother
connection before continuing . */
return sig ;
}
1293
}
1294
1295
return sig ;
}
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
/* 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 );
}
1312
1313
static void gdb_accept ( void * opaque )
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
{
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 ) {
1327
1328
1329
break ;
}
}
1330
1331
1332
/* set short latency */
val = 1 ;
1333
setsockopt ( fd , IPPROTO_TCP , TCP_NODELAY , ( char * ) & val , sizeof ( val ));
ths
authored
18 years ago
1334
1335
1336
s = & gdbserver_state ;
memset ( s , 0 , sizeof ( GDBState ));
1337
s -> env = first_cpu ; /* XXX: allow to change CPU */
1338
1339
s -> fd = fd ;
1340
1341
gdb_syscall_state = s ;
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
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 ;
1358
setsockopt ( fd , SOL_SOCKET , SO_REUSEADDR , ( char * ) & val , sizeof ( val ));
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
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 */
1382
gdb_accept ( NULL );
1383
1384
return 0 ;
}
1385
# else
ths
authored
18 years ago
1386
static int gdb_chr_can_receive ( void * opaque )
1387
1388
1389
1390
{
return 1 ;
}
ths
authored
18 years ago
1391
static void gdb_chr_receive ( void * opaque , const uint8_t * buf , int size )
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
{
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 );
1406
gdb_syscall_state = opaque ;
1407
1408
1409
1410
1411
1412
break ;
default :
break ;
}
}
1413
int gdbserver_start ( const char * port )
1414
1415
{
GDBState * s ;
1416
1417
1418
1419
1420
1421
1422
char gdbstub_port_name [ 128 ];
int port_num ;
char * p ;
CharDriverState * chr ;
if ( ! port || !* port )
return - 1 ;
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
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 );
1433
1434
1435
1436
1437
1438
1439
1440
1441
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
1442
qemu_chr_add_handlers ( chr , gdb_chr_can_receive , gdb_chr_receive ,
1443
1444
gdb_chr_event , s );
qemu_add_vm_stop_handler ( gdb_vm_stopped , s );
1445
1446
return 0 ;
}
1447
# endif