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/*
* gdb server stub
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*
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* Copyright ( c ) 2003 - 2005 Fabrice Bellard
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*
* This library is free software ; you can redistribute it and / or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation ; either
* version 2 of the License , or ( at your option ) any later version .
*
* This library is distributed in the hope that it will be useful ,
* but WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the GNU
* Lesser General Public License for more details .
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library ; if not , write to the Free Software
* Foundation , Inc ., 59 Temple Place , Suite 330 , Boston , MA 02111 - 1307 USA
*/
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# include "config.h"
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# ifdef CONFIG_USER_ONLY
# include < stdlib . h >
# include < stdio . h >
# include < stdarg . h >
# include < string . h >
# include < errno . h >
# include < unistd . h >
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# include < fcntl . h >
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# include "qemu.h"
# else
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# include "qemu-common.h"
# include "qemu-char.h"
# include "sysemu.h"
# include "gdbstub.h"
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# endif
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# include "qemu_socket.h"
# ifdef _WIN32
/* XXX: these constants may be independent of the host ones even for Unix */
# ifndef SIGTRAP
# define SIGTRAP 5
# endif
# ifndef SIGINT
# define SIGINT 2
# endif
# else
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# include < signal . h >
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# endif
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// # define DEBUG_GDB
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enum RSState {
RS_IDLE ,
RS_GETLINE ,
RS_CHKSUM1 ,
RS_CHKSUM2 ,
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RS_SYSCALL ,
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};
typedef struct GDBState {
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CPUState * env ; /* current CPU */
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enum RSState state ; /* parsing state */
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char line_buf [ 4096 ];
int line_buf_index ;
int line_csum ;
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uint8_t last_packet [ 4100 ];
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int last_packet_len ;
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# 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 ;
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uint8_t * p ;
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# ifdef DEBUG_GDB
printf ( "reply='%s' \n " , buf );
# endif
for (;;) {
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p = s -> last_packet ;
* ( p ++ ) = '$' ;
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len = strlen ( buf );
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memcpy ( p , buf , len );
p += len ;
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csum = 0 ;
for ( i = 0 ; i < len ; i ++ ) {
csum += buf [ i ];
}
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* ( p ++ ) = '#' ;
* ( p ++ ) = tohex (( csum >> 4 ) & 0xf );
* ( p ++ ) = tohex (( csum ) & 0xf );
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s -> last_packet_len = p - s -> last_packet ;
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put_buffer ( s , ( uint8_t * ) s -> last_packet , s -> last_packet_len );
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# ifdef CONFIG_USER_ONLY
i = get_char ( s );
if ( i < 0 )
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return - 1 ;
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if ( i == '+' )
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break ;
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# else
break ;
# endif
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}
return 0 ;
}
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# if defined ( TARGET_I386 )
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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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
597
u . l . upper = tswap32 ( * ( uint32_t * ) ptr );
598
599
600
601
602
603
u . l . lower = tswap32 ( * ( uint32_t * ) ptr );
env -> fregs [ i ] = u . d ;
}
/* FP control regs (not implemented). */
ptr += 3 * 4 ;
}
604
605
606
607
608
609
610
611
612
# elif defined ( TARGET_MIPS )
static int cpu_gdb_read_registers ( CPUState * env , uint8_t * mem_buf )
{
int i ;
uint8_t * ptr ;
ptr = mem_buf ;
for ( i = 0 ; i < 32 ; i ++ )
{
ths
authored
17 years ago
613
* ( target_ulong * ) ptr = tswapl ( env -> gpr [ env -> current_tc ][ i ]);
ths
authored
18 years ago
614
ptr += sizeof ( target_ulong );
615
616
}
ths
authored
17 years ago
617
* ( target_ulong * ) ptr = ( int32_t ) tswap32 ( env -> CP0_Status );
ths
authored
18 years ago
618
ptr += sizeof ( target_ulong );
619
ths
authored
17 years ago
620
* ( target_ulong * ) ptr = tswapl ( env -> LO [ env -> current_tc ][ 0 ]);
ths
authored
18 years ago
621
ptr += sizeof ( target_ulong );
622
ths
authored
17 years ago
623
* ( target_ulong * ) ptr = tswapl ( env -> HI [ env -> current_tc ][ 0 ]);
ths
authored
18 years ago
624
ptr += sizeof ( target_ulong );
625
ths
authored
18 years ago
626
627
* ( target_ulong * ) ptr = tswapl ( env -> CP0_BadVAddr );
ptr += sizeof ( target_ulong );
628
ths
authored
17 years ago
629
* ( target_ulong * ) ptr = ( int32_t ) tswap32 ( env -> CP0_Cause );
ths
authored
18 years ago
630
ptr += sizeof ( target_ulong );
631
ths
authored
18 years ago
632
* ( target_ulong * ) ptr = tswapl ( env -> PC [ env -> current_tc ]);
ths
authored
18 years ago
633
ptr += sizeof ( target_ulong );
634
ths
authored
18 years ago
635
if ( env -> CP0_Config1 & ( 1 << CP0C1_FP ))
ths
authored
18 years ago
636
{
ths
authored
18 years ago
637
638
for ( i = 0 ; i < 32 ; i ++ )
{
ths
authored
17 years ago
639
640
641
642
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
643
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
644
}
ths
authored
18 years ago
645
ths
authored
17 years ago
646
* ( target_ulong * ) ptr = ( int32_t ) tswap32 ( env -> fpu -> fcr31 );
ths
authored
18 years ago
647
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
648
ths
authored
17 years ago
649
* ( target_ulong * ) ptr = ( int32_t ) tswap32 ( env -> fpu -> fcr0 );
ths
authored
18 years ago
650
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
651
}
ths
authored
18 years ago
652
ths
authored
17 years ago
653
654
655
656
657
658
659
660
661
662
663
664
665
666
/* "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 );
667
668
669
670
return ptr - mem_buf ;
}
ths
authored
18 years ago
671
672
673
674
675
676
677
678
679
/* 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
680
set_float_rounding_mode ( ieee_rm [ env -> fpu -> fcr31 & 3 ], & env -> fpu -> fp_status )
ths
authored
18 years ago
681
682
683
684
685
686
687
688
689
static void cpu_gdb_write_registers ( CPUState * env , uint8_t * mem_buf , int size )
{
int i ;
uint8_t * ptr ;
ptr = mem_buf ;
for ( i = 0 ; i < 32 ; i ++ )
{
ths
authored
17 years ago
690
env -> gpr [ env -> current_tc ][ i ] = tswapl ( * ( target_ulong * ) ptr );
ths
authored
18 years ago
691
ptr += sizeof ( target_ulong );
692
693
}
ths
authored
18 years ago
694
695
env -> CP0_Status = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
696
ths
authored
17 years ago
697
env -> LO [ env -> current_tc ][ 0 ] = tswapl ( * ( target_ulong * ) ptr );
ths
authored
18 years ago
698
ptr += sizeof ( target_ulong );
699
ths
authored
17 years ago
700
env -> HI [ env -> current_tc ][ 0 ] = tswapl ( * ( target_ulong * ) ptr );
ths
authored
18 years ago
701
ptr += sizeof ( target_ulong );
702
ths
authored
18 years ago
703
704
env -> CP0_BadVAddr = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
705
ths
authored
18 years ago
706
707
env -> CP0_Cause = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
708
ths
authored
18 years ago
709
env -> PC [ env -> current_tc ] = tswapl ( * ( target_ulong * ) ptr );
ths
authored
18 years ago
710
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
711
ths
authored
18 years ago
712
if ( env -> CP0_Config1 & ( 1 << CP0C1_FP ))
ths
authored
18 years ago
713
{
ths
authored
18 years ago
714
715
for ( i = 0 ; i < 32 ; i ++ )
{
ths
authored
17 years ago
716
717
718
719
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
720
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
721
}
ths
authored
18 years ago
722
ths
authored
17 years ago
723
env -> fpu -> fcr31 = tswapl ( * ( target_ulong * ) ptr ) & 0xFF83FFFF ;
ths
authored
18 years ago
724
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
725
ths
authored
17 years ago
726
/* The remaining registers are assumed to be read-only. */
ths
authored
18 years ago
727
ths
authored
18 years ago
728
729
/* set rounding mode */
RESTORE_ROUNDING_MODE ;
ths
authored
18 years ago
730
731
# ifndef CONFIG_SOFTFLOAT
ths
authored
18 years ago
732
733
/* no floating point exception for native float */
SET_FP_ENABLE ( env -> fcr31 , 0 );
ths
authored
18 years ago
734
# endif
ths
authored
18 years ago
735
}
736
}
737
# elif defined ( TARGET_SH4 )
ths
authored
18 years ago
738
739
740
/* Hint: Use "set architecture sh4" in GDB to see fpu registers */
741
742
743
744
745
746
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 )
747
748
749
750
751
752
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 ]);
753
754
755
756
757
758
759
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
760
761
762
763
764
765
766
767
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 ]);
768
769
770
771
772
773
774
775
776
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 ++ ;
777
778
779
780
781
782
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 ]);
783
784
785
786
787
788
789
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
790
791
792
793
794
795
796
797
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 ]);
798
}
ths
authored
17 years ago
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
# 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 ]);
831
srs = env -> pregs [ PR_SRS ];
ths
authored
17 years ago
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
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 );
}
859
# else
860
861
862
863
864
865
866
867
868
869
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
870
871
static int gdb_handle_packet ( GDBState * s , CPUState * env , const char * line_buf )
872
873
{
const char * p ;
874
int ch , reg_size , type ;
875
char buf [ 4096 ];
ths
authored
17 years ago
876
uint8_t mem_buf [ 4096 ];
877
uint32_t * registers ;
878
target_ulong addr , len ;
ths
authored
18 years ago
879
880
881
882
883
884
885
886
# ifdef DEBUG_GDB
printf ( "command='%s' \n " , line_buf );
# endif
p = line_buf ;
ch = * p ++ ;
switch ( ch ) {
case '?' :
887
/* TODO: Make this return the correct value for user-mode. */
888
889
890
891
892
snprintf ( buf , sizeof ( buf ), "S%02x" , SIGTRAP );
put_packet ( s , buf );
break ;
case 'c' :
if ( * p != '\0' ) {
893
addr = strtoull ( p , ( char ** ) & p , 16 );
894
# if defined ( TARGET_I386 )
895
env -> eip = addr ;
896
# elif defined ( TARGET_PPC )
897
env -> nip = addr ;
898
899
900
# elif defined ( TARGET_SPARC )
env -> pc = addr ;
env -> npc = addr + 4 ;
901
902
# elif defined ( TARGET_ARM )
env -> regs [ 15 ] = addr ;
903
# elif defined ( TARGET_SH4 )
ths
authored
18 years ago
904
905
env -> pc = addr ;
# elif defined ( TARGET_MIPS )
ths
authored
18 years ago
906
env -> PC [ env -> current_tc ] = addr ;
ths
authored
17 years ago
907
908
# elif defined ( TARGET_CRIS )
env -> pc = addr ;
909
# endif
910
}
911
912
913
914
915
916
# ifdef CONFIG_USER_ONLY
s -> running_state = 1 ;
# else
vm_start ();
# endif
return RS_IDLE ;
917
918
case 's' :
if ( * p != '\0' ) {
ths
authored
18 years ago
919
addr = strtoull ( p , ( char ** ) & p , 16 );
920
# if defined ( TARGET_I386 )
921
env -> eip = addr ;
922
# elif defined ( TARGET_PPC )
923
env -> nip = addr ;
924
925
926
# elif defined ( TARGET_SPARC )
env -> pc = addr ;
env -> npc = addr + 4 ;
927
928
# elif defined ( TARGET_ARM )
env -> regs [ 15 ] = addr ;
929
# elif defined ( TARGET_SH4 )
ths
authored
18 years ago
930
931
env -> pc = addr ;
# elif defined ( TARGET_MIPS )
ths
authored
18 years ago
932
env -> PC [ env -> current_tc ] = addr ;
ths
authored
17 years ago
933
934
# elif defined ( TARGET_CRIS )
env -> pc = addr ;
935
# endif
936
937
}
cpu_single_step ( env , 1 );
938
939
940
941
942
943
# ifdef CONFIG_USER_ONLY
s -> running_state = 1 ;
# else
vm_start ();
# endif
return RS_IDLE ;
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
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 ;
972
973
974
975
976
977
978
979
980
981
982
983
984
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' :
985
addr = strtoull ( p , ( char ** ) & p , 16 );
986
987
if ( * p == ',' )
p ++ ;
988
len = strtoull ( p , NULL , 16 );
989
990
991
992
993
994
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 );
}
995
996
break ;
case 'M' :
997
addr = strtoull ( p , ( char ** ) & p , 16 );
998
999
if ( * p == ',' )
p ++ ;
1000
len = strtoull ( p , ( char ** ) & p , 16 );
1001
if ( * p == ':' )
1002
1003
1004
p ++ ;
hextomem ( mem_buf , p , len );
if ( cpu_memory_rw_debug ( env , addr , mem_buf , len , 1 ) != 0 )
1005
put_packet ( s , "E14" );
1006
1007
1008
1009
1010
1011
1012
else
put_packet ( s , "OK" );
break ;
case 'Z' :
type = strtoul ( p , ( char ** ) & p , 16 );
if ( * p == ',' )
p ++ ;
1013
addr = strtoull ( p , ( char ** ) & p , 16 );
1014
1015
if ( * p == ',' )
p ++ ;
1016
len = strtoull ( p , ( char ** ) & p , 16 );
1017
1018
1019
1020
if ( type == 0 || type == 1 ) {
if ( cpu_breakpoint_insert ( env , addr ) < 0 )
goto breakpoint_error ;
put_packet ( s , "OK" );
1021
1022
1023
1024
1025
1026
# ifndef CONFIG_USER_ONLY
} else if ( type == 2 ) {
if ( cpu_watchpoint_insert ( env , addr ) < 0 )
goto breakpoint_error ;
put_packet ( s , "OK" );
# endif
1027
1028
} else {
breakpoint_error :
1029
put_packet ( s , "E22" );
1030
1031
1032
1033
1034
1035
}
break ;
case 'z' :
type = strtoul ( p , ( char ** ) & p , 16 );
if ( * p == ',' )
p ++ ;
1036
addr = strtoull ( p , ( char ** ) & p , 16 );
1037
1038
if ( * p == ',' )
p ++ ;
1039
len = strtoull ( p , ( char ** ) & p , 16 );
1040
1041
1042
if ( type == 0 || type == 1 ) {
cpu_breakpoint_remove ( env , addr );
put_packet ( s , "OK" );
1043
1044
1045
1046
1047
# ifndef CONFIG_USER_ONLY
} else if ( type == 2 ) {
cpu_watchpoint_remove ( env , addr );
put_packet ( s , "OK" );
# endif
1048
1049
1050
1051
} else {
goto breakpoint_error ;
}
break ;
ths
authored
18 years ago
1052
# ifdef CONFIG_LINUX_USER
1053
1054
1055
1056
case 'q' :
if ( strncmp ( p , "Offsets" , 7 ) == 0 ) {
TaskState * ts = env -> opaque ;
ths
authored
18 years ago
1057
sprintf ( buf ,
1058
1059
"Text=" TARGET_ABI_FMT_lx ";Data=" TARGET_ABI_FMT_lx
";Bss=" TARGET_ABI_FMT_lx ,
ths
authored
18 years ago
1060
1061
1062
ts -> info -> code_offset ,
ts -> info -> data_offset ,
ts -> info -> data_offset );
1063
1064
1065
1066
1067
put_packet ( s , buf );
break ;
}
/* Fall through. */
# endif
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
default :
// unknown_command :
/* put empty packet */
buf [ 0 ] = '\0' ;
put_packet ( s , buf );
break ;
}
return RS_IDLE ;
}
1078
1079
extern void tb_flush ( CPUState * env );
1080
# ifndef CONFIG_USER_ONLY
1081
1082
1083
1084
1085
1086
static void gdb_vm_stopped ( void * opaque , int reason )
{
GDBState * s = opaque ;
char buf [ 256 ];
int ret ;
1087
1088
1089
if ( s -> state == RS_SYSCALL )
return ;
1090
/* disable single step if it was enable */
1091
cpu_single_step ( s -> env , 0 );
1092
1093
if ( reason == EXCP_DEBUG ) {
1094
if ( s -> env -> watchpoint_hit ) {
1095
1096
snprintf ( buf , sizeof ( buf ), "T%02xwatch:" TARGET_FMT_lx ";" ,
SIGTRAP ,
1097
1098
1099
1100
1101
s -> env -> watchpoint [ s -> env -> watchpoint_hit - 1 ]. vaddr );
put_packet ( s , buf );
s -> env -> watchpoint_hit = 0 ;
return ;
}
1102
tb_flush ( s -> env );
1103
ret = SIGTRAP ;
1104
1105
1106
} else if ( reason == EXCP_INTERRUPT ) {
ret = SIGINT ;
} else {
1107
ret = 0 ;
1108
}
1109
1110
1111
snprintf ( buf , sizeof ( buf ), "S%02x" , ret );
put_packet ( s , buf );
}
1112
# endif
1113
1114
1115
/* Send a gdb syscall request .
This accepts limited printf - style format specifiers , specifically :
1116
1117
1118
% x - target_ulong argument printed in hex .
% lx - 64 - bit argument printed in hex .
% s - string pointer ( target_ulong ) and length ( int ) pair . */
1119
1120
1121
1122
1123
1124
void gdb_do_syscall ( gdb_syscall_complete_cb cb , char * fmt , ...)
{
va_list va ;
char buf [ 256 ];
char * p ;
target_ulong addr ;
1125
uint64_t i64 ;
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
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 ;
1148
1149
1150
1151
1152
1153
case 'l' :
if ( * ( fmt ++ ) != 'x' )
goto bad_format ;
i64 = va_arg ( va , uint64_t );
p += sprintf ( p , "%" PRIx64 , i64 );
break ;
1154
1155
1156
1157
1158
case 's' :
addr = va_arg ( va , target_ulong );
p += sprintf ( p , TARGET_FMT_lx "/%x" , addr , va_arg ( va , int ));
break ;
default :
1159
bad_format :
1160
1161
1162
1163
1164
1165
1166
1167
fprintf ( stderr , "gdbstub: Bad syscall format string '%s' \n " ,
fmt - 1 );
break ;
}
} else {
* ( p ++ ) = * ( fmt ++ );
}
}
1168
* p = 0 ;
1169
1170
1171
1172
1173
1174
1175
1176
1177
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
}
1178
static void gdb_read_byte ( GDBState * s , int ch )
1179
{
1180
CPUState * env = s -> env ;
1181
int i , csum ;
ths
authored
17 years ago
1182
uint8_t reply ;
1183
1184
# ifndef CONFIG_USER_ONLY
1185
1186
1187
1188
1189
1190
1191
if ( s -> last_packet_len ) {
/* Waiting for a response to the last packet . If we see the start
of a new command then abandon the previous response . */
if ( ch == '-' ) {
# ifdef DEBUG_GDB
printf ( "Got NACK, retransmitting \n " );
# endif
ths
authored
17 years ago
1192
put_buffer ( s , ( uint8_t * ) s -> last_packet , s -> last_packet_len );
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
}
# 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 != '$' )
return ;
}
1205
1206
1207
1208
if ( vm_running ) {
/* when the CPU is running , we cannot do anything except stop
it when receiving a char */
vm_stop ( EXCP_INTERRUPT );
ths
authored
18 years ago
1209
} else
1210
# endif
1211
{
1212
1213
1214
1215
1216
switch ( s -> state ) {
case RS_IDLE :
if ( ch == '$' ) {
s -> line_buf_index = 0 ;
s -> state = RS_GETLINE ;
1217
}
1218
break ;
1219
1220
1221
1222
1223
case RS_GETLINE :
if ( ch == '#' ) {
s -> state = RS_CHKSUM1 ;
} else if ( s -> line_buf_index >= sizeof ( s -> line_buf ) - 1 ) {
s -> state = RS_IDLE ;
1224
} else {
1225
s -> line_buf [ s -> line_buf_index ++ ] = ch ;
1226
1227
}
break ;
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 )) {
ths
authored
17 years ago
1240
1241
reply = '-' ;
put_buffer ( s , & reply , 1 );
1242
s -> state = RS_IDLE ;
1243
} else {
ths
authored
17 years ago
1244
1245
reply = '+' ;
put_buffer ( s , & reply , 1 );
1246
s -> state = gdb_handle_packet ( s , env , s -> line_buf );
1247
1248
}
break ;
1249
1250
default :
abort ();
1251
1252
1253
1254
}
}
}
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
# 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 ;
1280
1281
s -> running_state = 0 ;
while ( s -> running_state == 0 ) {
1282
1283
1284
1285
1286
1287
n = read ( s -> fd , buf , 256 );
if ( n > 0 )
{
int i ;
for ( i = 0 ; i < n ; i ++ )
1288
gdb_read_byte ( s , buf [ i ]);
1289
1290
1291
1292
1293
1294
1295
}
else if ( n == 0 || errno != EAGAIN )
{
/* XXX : Connection closed . Should probably wait for annother
connection before continuing . */
return sig ;
}
1296
}
1297
1298
return sig ;
}
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
/* 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 );
}
1315
1316
static void gdb_accept ( void * opaque )
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
{
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 ) {
1330
1331
1332
break ;
}
}
1333
1334
1335
/* set short latency */
val = 1 ;
1336
setsockopt ( fd , IPPROTO_TCP , TCP_NODELAY , ( char * ) & val , sizeof ( val ));
ths
authored
18 years ago
1337
1338
1339
s = & gdbserver_state ;
memset ( s , 0 , sizeof ( GDBState ));
1340
s -> env = first_cpu ; /* XXX: allow to change CPU */
1341
1342
s -> fd = fd ;
1343
1344
gdb_syscall_state = s ;
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
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 ;
1361
setsockopt ( fd , SOL_SOCKET , SO_REUSEADDR , ( char * ) & val , sizeof ( val ));
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
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 */
1385
gdb_accept ( NULL );
1386
1387
return 0 ;
}
1388
# else
ths
authored
18 years ago
1389
static int gdb_chr_can_receive ( void * opaque )
1390
1391
1392
1393
{
return 1 ;
}
ths
authored
18 years ago
1394
static void gdb_chr_receive ( void * opaque , const uint8_t * buf , int size )
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
{
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 );
1409
gdb_syscall_state = opaque ;
1410
1411
1412
1413
1414
1415
break ;
default :
break ;
}
}
1416
int gdbserver_start ( const char * port )
1417
1418
{
GDBState * s ;
1419
1420
1421
1422
1423
1424
1425
char gdbstub_port_name [ 128 ];
int port_num ;
char * p ;
CharDriverState * chr ;
if ( ! port || !* port )
return - 1 ;
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
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 );
1436
1437
1438
1439
1440
1441
1442
1443
1444
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
1445
qemu_chr_add_handlers ( chr , gdb_chr_can_receive , gdb_chr_receive ,
1446
1447
gdb_chr_event , s );
qemu_add_vm_stop_handler ( gdb_vm_stopped , s );
1448
1449
return 0 ;
}
1450
# endif