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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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/* Resume execution. */
static inline void gdb_continue ( GDBState * s )
{
# ifdef CONFIG_USER_ONLY
s -> running_state = 1 ;
# else
vm_start ();
# endif
}
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static void put_buffer ( GDBState * s , const uint8_t * buf , int len )
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{
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# ifdef CONFIG_USER_ONLY
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int ret ;
while ( len > 0 ) {
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ret = send ( s -> fd , buf , len , 0 );
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if ( ret < 0 ) {
if ( errno != EINTR && errno != EAGAIN )
return ;
} else {
buf += ret ;
len -= ret ;
}
}
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# else
qemu_chr_write ( s -> chr , buf , len );
# endif
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}
static inline int fromhex ( int v )
{
if ( v >= '0' && v <= '9' )
return v - '0' ;
else if ( v >= 'A' && v <= 'F' )
return v - 'A' + 10 ;
else if ( v >= 'a' && v <= 'f' )
return v - 'a' + 10 ;
else
return 0 ;
}
static inline int tohex ( int v )
{
if ( v < 10 )
return v + '0' ;
else
return v - 10 + 'a' ;
}
static void memtohex ( char * buf , const uint8_t * mem , int len )
{
int i , c ;
char * q ;
q = buf ;
for ( i = 0 ; i < len ; i ++ ) {
c = mem [ i ];
* q ++ = tohex ( c >> 4 );
* q ++ = tohex ( c & 0xf );
}
* q = '\0' ;
}
static void hextomem ( uint8_t * mem , const char * buf , int len )
{
int i ;
for ( i = 0 ; i < len ; i ++ ) {
mem [ i ] = ( fromhex ( buf [ 0 ]) << 4 ) | fromhex ( buf [ 1 ]);
buf += 2 ;
}
}
/* return -1 if error, 0 if OK */
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static int put_packet ( GDBState * s , char * buf )
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{
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int len , csum , i ;
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uint8_t * p ;
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# ifdef DEBUG_GDB
printf ( "reply='%s' \n " , buf );
# endif
for (;;) {
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p = s -> last_packet ;
* ( p ++ ) = '$' ;
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len = strlen ( buf );
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memcpy ( p , buf , len );
p += len ;
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csum = 0 ;
for ( i = 0 ; i < len ; i ++ ) {
csum += buf [ i ];
}
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* ( p ++ ) = '#' ;
* ( p ++ ) = tohex (( csum >> 4 ) & 0xf );
* ( p ++ ) = tohex (( csum ) & 0xf );
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s -> last_packet_len = p - s -> last_packet ;
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put_buffer ( s , ( uint8_t * ) s -> last_packet , s -> last_packet_len );
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# ifdef CONFIG_USER_ONLY
i = get_char ( s );
if ( i < 0 )
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return - 1 ;
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if ( i == '+' )
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break ;
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# else
break ;
# endif
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}
return 0 ;
}
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# if defined ( TARGET_I386 )
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
607
u . l . upper = tswap32 ( * ( uint32_t * ) ptr );
608
609
610
611
612
613
u . l . lower = tswap32 ( * ( uint32_t * ) ptr );
env -> fregs [ i ] = u . d ;
}
/* FP control regs (not implemented). */
ptr += 3 * 4 ;
}
614
615
616
617
618
619
620
621
622
# 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
623
* ( target_ulong * ) ptr = tswapl ( env -> gpr [ env -> current_tc ][ i ]);
ths
authored
18 years ago
624
ptr += sizeof ( target_ulong );
625
626
}
ths
authored
17 years ago
627
* ( target_ulong * ) ptr = ( int32_t ) tswap32 ( env -> CP0_Status );
ths
authored
18 years ago
628
ptr += sizeof ( target_ulong );
629
ths
authored
17 years ago
630
* ( target_ulong * ) ptr = tswapl ( env -> LO [ env -> current_tc ][ 0 ]);
ths
authored
18 years ago
631
ptr += sizeof ( target_ulong );
632
ths
authored
17 years ago
633
* ( target_ulong * ) ptr = tswapl ( env -> HI [ env -> current_tc ][ 0 ]);
ths
authored
18 years ago
634
ptr += sizeof ( target_ulong );
635
ths
authored
18 years ago
636
637
* ( target_ulong * ) ptr = tswapl ( env -> CP0_BadVAddr );
ptr += sizeof ( target_ulong );
638
ths
authored
17 years ago
639
* ( target_ulong * ) ptr = ( int32_t ) tswap32 ( env -> CP0_Cause );
ths
authored
18 years ago
640
ptr += sizeof ( target_ulong );
641
ths
authored
18 years ago
642
* ( target_ulong * ) ptr = tswapl ( env -> PC [ env -> current_tc ]);
ths
authored
18 years ago
643
ptr += sizeof ( target_ulong );
644
ths
authored
18 years ago
645
if ( env -> CP0_Config1 & ( 1 << CP0C1_FP ))
ths
authored
18 years ago
646
{
ths
authored
18 years ago
647
648
for ( i = 0 ; i < 32 ; i ++ )
{
ths
authored
17 years ago
649
650
651
652
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
653
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
654
}
ths
authored
18 years ago
655
ths
authored
17 years ago
656
* ( target_ulong * ) ptr = ( int32_t ) tswap32 ( env -> fpu -> fcr31 );
ths
authored
18 years ago
657
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
658
ths
authored
17 years ago
659
* ( target_ulong * ) ptr = ( int32_t ) tswap32 ( env -> fpu -> fcr0 );
ths
authored
18 years ago
660
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
661
}
ths
authored
18 years ago
662
ths
authored
17 years ago
663
664
665
666
667
668
669
670
671
672
673
674
675
676
/* "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 );
677
678
679
680
return ptr - mem_buf ;
}
ths
authored
18 years ago
681
682
683
684
685
686
687
688
689
/* 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
690
set_float_rounding_mode ( ieee_rm [ env -> fpu -> fcr31 & 3 ], & env -> fpu -> fp_status )
ths
authored
18 years ago
691
692
693
694
695
696
697
698
699
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
700
env -> gpr [ env -> current_tc ][ i ] = tswapl ( * ( target_ulong * ) ptr );
ths
authored
18 years ago
701
ptr += sizeof ( target_ulong );
702
703
}
ths
authored
18 years ago
704
705
env -> CP0_Status = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
706
ths
authored
17 years ago
707
env -> LO [ env -> current_tc ][ 0 ] = tswapl ( * ( target_ulong * ) ptr );
ths
authored
18 years ago
708
ptr += sizeof ( target_ulong );
709
ths
authored
17 years ago
710
env -> HI [ env -> current_tc ][ 0 ] = tswapl ( * ( target_ulong * ) ptr );
ths
authored
18 years ago
711
ptr += sizeof ( target_ulong );
712
ths
authored
18 years ago
713
714
env -> CP0_BadVAddr = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
715
ths
authored
18 years ago
716
717
env -> CP0_Cause = tswapl ( * ( target_ulong * ) ptr );
ptr += sizeof ( target_ulong );
718
ths
authored
18 years ago
719
env -> PC [ env -> current_tc ] = 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
if ( env -> CP0_Config1 & ( 1 << CP0C1_FP ))
ths
authored
18 years ago
723
{
ths
authored
18 years ago
724
725
for ( i = 0 ; i < 32 ; i ++ )
{
ths
authored
17 years ago
726
727
728
729
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
730
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
731
}
ths
authored
18 years ago
732
ths
authored
17 years ago
733
env -> fpu -> fcr31 = tswapl ( * ( target_ulong * ) ptr ) & 0xFF83FFFF ;
ths
authored
18 years ago
734
ptr += sizeof ( target_ulong );
ths
authored
18 years ago
735
ths
authored
17 years ago
736
/* The remaining registers are assumed to be read-only. */
ths
authored
18 years ago
737
ths
authored
18 years ago
738
739
/* set rounding mode */
RESTORE_ROUNDING_MODE ;
ths
authored
18 years ago
740
741
# ifndef CONFIG_SOFTFLOAT
ths
authored
18 years ago
742
743
/* no floating point exception for native float */
SET_FP_ENABLE ( env -> fcr31 , 0 );
ths
authored
18 years ago
744
# endif
ths
authored
18 years ago
745
}
746
}
747
# elif defined ( TARGET_SH4 )
ths
authored
18 years ago
748
749
750
/* Hint: Use "set architecture sh4" in GDB to see fpu registers */
751
752
753
754
755
756
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 )
757
758
759
760
761
762
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 ]);
763
764
765
766
767
768
769
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
770
771
772
773
774
775
776
777
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 ]);
778
779
780
781
782
783
784
785
786
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 ++ ;
787
788
789
790
791
792
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 ]);
793
794
795
796
797
798
799
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
800
801
802
803
804
805
806
807
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 ]);
808
}
ths
authored
17 years ago
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
# 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 ]);
841
srs = env -> pregs [ PR_SRS ];
ths
authored
17 years ago
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
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 );
}
869
# else
870
871
872
873
874
875
876
877
878
879
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
880
881
static int gdb_handle_packet ( GDBState * s , CPUState * env , const char * line_buf )
882
883
{
const char * p ;
884
int ch , reg_size , type ;
885
char buf [ 4096 ];
ths
authored
17 years ago
886
uint8_t mem_buf [ 4096 ];
887
uint32_t * registers ;
888
target_ulong addr , len ;
ths
authored
18 years ago
889
890
891
892
893
894
895
896
# ifdef DEBUG_GDB
printf ( "command='%s' \n " , line_buf );
# endif
p = line_buf ;
ch = * p ++ ;
switch ( ch ) {
case '?' :
897
/* TODO: Make this return the correct value for user-mode. */
898
899
900
901
902
snprintf ( buf , sizeof ( buf ), "S%02x" , SIGTRAP );
put_packet ( s , buf );
break ;
case 'c' :
if ( * p != '\0' ) {
903
addr = strtoull ( p , ( char ** ) & p , 16 );
904
# if defined ( TARGET_I386 )
905
env -> eip = addr ;
906
# elif defined ( TARGET_PPC )
907
env -> nip = addr ;
908
909
910
# elif defined ( TARGET_SPARC )
env -> pc = addr ;
env -> npc = addr + 4 ;
911
912
# elif defined ( TARGET_ARM )
env -> regs [ 15 ] = addr ;
913
# elif defined ( TARGET_SH4 )
ths
authored
18 years ago
914
915
env -> pc = addr ;
# elif defined ( TARGET_MIPS )
ths
authored
18 years ago
916
env -> PC [ env -> current_tc ] = addr ;
ths
authored
17 years ago
917
918
# elif defined ( TARGET_CRIS )
env -> pc = addr ;
919
# endif
920
}
921
gdb_continue ( s );
922
return RS_IDLE ;
923
924
case 's' :
if ( * p != '\0' ) {
ths
authored
18 years ago
925
addr = strtoull ( p , ( char ** ) & p , 16 );
926
# if defined ( TARGET_I386 )
927
env -> eip = addr ;
928
# elif defined ( TARGET_PPC )
929
env -> nip = addr ;
930
931
932
# elif defined ( TARGET_SPARC )
env -> pc = addr ;
env -> npc = addr + 4 ;
933
934
# elif defined ( TARGET_ARM )
env -> regs [ 15 ] = addr ;
935
# elif defined ( TARGET_SH4 )
ths
authored
18 years ago
936
937
env -> pc = addr ;
# elif defined ( TARGET_MIPS )
ths
authored
18 years ago
938
env -> PC [ env -> current_tc ] = addr ;
ths
authored
17 years ago
939
940
# elif defined ( TARGET_CRIS )
env -> pc = addr ;
941
# endif
942
943
}
cpu_single_step ( env , 1 );
944
gdb_continue ( s );
945
return RS_IDLE ;
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
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 {
966
gdb_continue ( s );
967
968
969
}
}
break ;
970
971
972
973
974
975
976
977
978
979
980
981
982
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' :
983
addr = strtoull ( p , ( char ** ) & p , 16 );
984
985
if ( * p == ',' )
p ++ ;
986
len = strtoull ( p , NULL , 16 );
987
988
989
990
991
992
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 );
}
993
994
break ;
case 'M' :
995
addr = strtoull ( p , ( char ** ) & p , 16 );
996
997
if ( * p == ',' )
p ++ ;
998
len = strtoull ( p , ( char ** ) & p , 16 );
999
if ( * p == ':' )
1000
1001
1002
p ++ ;
hextomem ( mem_buf , p , len );
if ( cpu_memory_rw_debug ( env , addr , mem_buf , len , 1 ) != 0 )
1003
put_packet ( s , "E14" );
1004
1005
1006
1007
1008
1009
1010
else
put_packet ( s , "OK" );
break ;
case 'Z' :
type = strtoul ( p , ( char ** ) & p , 16 );
if ( * p == ',' )
p ++ ;
1011
addr = strtoull ( p , ( char ** ) & p , 16 );
1012
1013
if ( * p == ',' )
p ++ ;
1014
len = strtoull ( p , ( char ** ) & p , 16 );
1015
1016
1017
1018
if ( type == 0 || type == 1 ) {
if ( cpu_breakpoint_insert ( env , addr ) < 0 )
goto breakpoint_error ;
put_packet ( s , "OK" );
1019
1020
1021
1022
1023
1024
# ifndef CONFIG_USER_ONLY
} else if ( type == 2 ) {
if ( cpu_watchpoint_insert ( env , addr ) < 0 )
goto breakpoint_error ;
put_packet ( s , "OK" );
# endif
1025
1026
} else {
breakpoint_error :
1027
put_packet ( s , "E22" );
1028
1029
1030
1031
1032
1033
}
break ;
case 'z' :
type = strtoul ( p , ( char ** ) & p , 16 );
if ( * p == ',' )
p ++ ;
1034
addr = strtoull ( p , ( char ** ) & p , 16 );
1035
1036
if ( * p == ',' )
p ++ ;
1037
len = strtoull ( p , ( char ** ) & p , 16 );
1038
1039
1040
if ( type == 0 || type == 1 ) {
cpu_breakpoint_remove ( env , addr );
put_packet ( s , "OK" );
1041
1042
1043
1044
1045
# ifndef CONFIG_USER_ONLY
} else if ( type == 2 ) {
cpu_watchpoint_remove ( env , addr );
put_packet ( s , "OK" );
# endif
1046
1047
1048
1049
} else {
goto breakpoint_error ;
}
break ;
ths
authored
18 years ago
1050
# ifdef CONFIG_LINUX_USER
1051
1052
1053
1054
case 'q' :
if ( strncmp ( p , "Offsets" , 7 ) == 0 ) {
TaskState * ts = env -> opaque ;
ths
authored
18 years ago
1055
sprintf ( buf ,
1056
1057
"Text=" TARGET_ABI_FMT_lx ";Data=" TARGET_ABI_FMT_lx
";Bss=" TARGET_ABI_FMT_lx ,
ths
authored
18 years ago
1058
1059
1060
ts -> info -> code_offset ,
ts -> info -> data_offset ,
ts -> info -> data_offset );
1061
1062
1063
1064
1065
put_packet ( s , buf );
break ;
}
/* Fall through. */
# endif
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
default :
// unknown_command :
/* put empty packet */
buf [ 0 ] = '\0' ;
put_packet ( s , buf );
break ;
}
return RS_IDLE ;
}
1076
1077
extern void tb_flush ( CPUState * env );
1078
# ifndef CONFIG_USER_ONLY
1079
1080
1081
1082
1083
1084
static void gdb_vm_stopped ( void * opaque , int reason )
{
GDBState * s = opaque ;
char buf [ 256 ];
int ret ;
1085
1086
1087
if ( s -> state == RS_SYSCALL )
return ;
1088
/* disable single step if it was enable */
1089
cpu_single_step ( s -> env , 0 );
1090
1091
if ( reason == EXCP_DEBUG ) {
1092
if ( s -> env -> watchpoint_hit ) {
1093
1094
snprintf ( buf , sizeof ( buf ), "T%02xwatch:" TARGET_FMT_lx ";" ,
SIGTRAP ,
1095
1096
1097
1098
1099
s -> env -> watchpoint [ s -> env -> watchpoint_hit - 1 ]. vaddr );
put_packet ( s , buf );
s -> env -> watchpoint_hit = 0 ;
return ;
}
1100
tb_flush ( s -> env );
1101
ret = SIGTRAP ;
1102
1103
1104
} else if ( reason == EXCP_INTERRUPT ) {
ret = SIGINT ;
} else {
1105
ret = 0 ;
1106
}
1107
1108
1109
snprintf ( buf , sizeof ( buf ), "S%02x" , ret );
put_packet ( s , buf );
}
1110
# endif
1111
1112
1113
/* Send a gdb syscall request .
This accepts limited printf - style format specifiers , specifically :
1114
1115
1116
% x - target_ulong argument printed in hex .
% lx - 64 - bit argument printed in hex .
% s - string pointer ( target_ulong ) and length ( int ) pair . */
1117
1118
1119
1120
1121
1122
void gdb_do_syscall ( gdb_syscall_complete_cb cb , char * fmt , ...)
{
va_list va ;
char buf [ 256 ];
char * p ;
target_ulong addr ;
1123
uint64_t i64 ;
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
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 ;
1146
1147
1148
1149
1150
1151
case 'l' :
if ( * ( fmt ++ ) != 'x' )
goto bad_format ;
i64 = va_arg ( va , uint64_t );
p += sprintf ( p , "%" PRIx64 , i64 );
break ;
1152
1153
1154
1155
1156
case 's' :
addr = va_arg ( va , target_ulong );
p += sprintf ( p , TARGET_FMT_lx "/%x" , addr , va_arg ( va , int ));
break ;
default :
1157
bad_format :
1158
1159
1160
1161
1162
1163
1164
1165
fprintf ( stderr , "gdbstub: Bad syscall format string '%s' \n " ,
fmt - 1 );
break ;
}
} else {
* ( p ++ ) = * ( fmt ++ );
}
}
1166
* p = 0 ;
1167
1168
1169
1170
1171
1172
1173
1174
1175
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
}
1176
static void gdb_read_byte ( GDBState * s , int ch )
1177
{
1178
CPUState * env = s -> env ;
1179
int i , csum ;
ths
authored
17 years ago
1180
uint8_t reply ;
1181
1182
# ifndef CONFIG_USER_ONLY
1183
1184
1185
1186
1187
1188
1189
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
1190
put_buffer ( s , ( uint8_t * ) s -> last_packet , s -> last_packet_len );
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
}
# 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 != '$' )
return ;
}
1203
1204
1205
1206
if ( vm_running ) {
/* when the CPU is running , we cannot do anything except stop
it when receiving a char */
vm_stop ( EXCP_INTERRUPT );
ths
authored
18 years ago
1207
} else
1208
# endif
1209
{
1210
1211
1212
1213
1214
switch ( s -> state ) {
case RS_IDLE :
if ( ch == '$' ) {
s -> line_buf_index = 0 ;
s -> state = RS_GETLINE ;
1215
}
1216
break ;
1217
1218
1219
1220
1221
case RS_GETLINE :
if ( ch == '#' ) {
s -> state = RS_CHKSUM1 ;
} else if ( s -> line_buf_index >= sizeof ( s -> line_buf ) - 1 ) {
s -> state = RS_IDLE ;
1222
} else {
1223
s -> line_buf [ s -> line_buf_index ++ ] = ch ;
1224
1225
}
break ;
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
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
1238
1239
reply = '-' ;
put_buffer ( s , & reply , 1 );
1240
s -> state = RS_IDLE ;
1241
} else {
ths
authored
17 years ago
1242
1243
reply = '+' ;
put_buffer ( s , & reply , 1 );
1244
s -> state = gdb_handle_packet ( s , env , s -> line_buf );
1245
1246
}
break ;
1247
1248
default :
abort ();
1249
1250
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
# 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 ;
1278
1279
s -> running_state = 0 ;
while ( s -> running_state == 0 ) {
1280
1281
1282
1283
1284
1285
n = read ( s -> fd , buf , 256 );
if ( n > 0 )
{
int i ;
for ( i = 0 ; i < n ; i ++ )
1286
gdb_read_byte ( s , buf [ i ]);
1287
1288
1289
1290
1291
1292
1293
}
else if ( n == 0 || errno != EAGAIN )
{
/* XXX : Connection closed . Should probably wait for annother
connection before continuing . */
return sig ;
}
1294
}
1295
1296
return sig ;
}
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
/* 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 );
}
1313
1314
static void gdb_accept ( void * opaque )
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
{
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 ) {
1328
1329
1330
break ;
}
}
1331
1332
1333
/* set short latency */
val = 1 ;
1334
setsockopt ( fd , IPPROTO_TCP , TCP_NODELAY , ( char * ) & val , sizeof ( val ));
ths
authored
18 years ago
1335
1336
1337
s = & gdbserver_state ;
memset ( s , 0 , sizeof ( GDBState ));
1338
s -> env = first_cpu ; /* XXX: allow to change CPU */
1339
1340
s -> fd = fd ;
1341
1342
gdb_syscall_state = s ;
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
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 ;
1359
setsockopt ( fd , SOL_SOCKET , SO_REUSEADDR , ( char * ) & val , sizeof ( val ));
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
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 */
1383
gdb_accept ( NULL );
1384
1385
return 0 ;
}
1386
# else
ths
authored
18 years ago
1387
static int gdb_chr_can_receive ( void * opaque )
1388
1389
1390
1391
{
return 1 ;
}
ths
authored
18 years ago
1392
static void gdb_chr_receive ( void * opaque , const uint8_t * buf , int size )
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
{
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 );
1407
gdb_syscall_state = opaque ;
1408
1409
1410
1411
1412
1413
break ;
default :
break ;
}
}
1414
int gdbserver_start ( const char * port )
1415
1416
{
GDBState * s ;
1417
1418
1419
1420
1421
1422
1423
char gdbstub_port_name [ 128 ];
int port_num ;
char * p ;
CharDriverState * chr ;
if ( ! port || !* port )
return - 1 ;
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
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 );
1434
1435
1436
1437
1438
1439
1440
1441
1442
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
1443
qemu_chr_add_handlers ( chr , gdb_chr_can_receive , gdb_chr_receive ,
1444
1445
gdb_chr_event , s );
qemu_add_vm_stop_handler ( gdb_vm_stopped , s );
1446
1447
return 0 ;
}
1448
# endif