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/*
* gdb server stub
ths
authored
18 years ago
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*
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* Copyright ( c ) 2003 - 2005 Fabrice Bellard
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*
* This library is free software ; you can redistribute it and / or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation ; either
* version 2 of the License , or ( at your option ) any later version .
*
* This library is distributed in the hope that it will be useful ,
* but WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the GNU
* Lesser General Public License for more details .
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library ; if not , write to the Free Software
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* Foundation , Inc ., 51 Franklin Street , Fifth Floor , Boston MA 02110 - 1301 USA
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*/
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# include "config.h"
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# include "qemu-common.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-char.h"
# include "sysemu.h"
# include "gdbstub.h"
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# endif
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# define MAX_PACKET_LENGTH 4096
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# include "qemu_socket.h"
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enum {
GDB_SIGNAL_0 = 0 ,
GDB_SIGNAL_INT = 2 ,
GDB_SIGNAL_TRAP = 5 ,
GDB_SIGNAL_UNKNOWN = 143
};
# ifdef CONFIG_USER_ONLY
/* Map target signal numbers to GDB protocol signal numbers and vice
* versa . For user emulation ' s currently supported systems , we can
* assume most signals are defined .
*/
static int gdb_signal_table [] = {
0 ,
TARGET_SIGHUP ,
TARGET_SIGINT ,
TARGET_SIGQUIT ,
TARGET_SIGILL ,
TARGET_SIGTRAP ,
TARGET_SIGABRT ,
- 1 , /* SIGEMT */
TARGET_SIGFPE ,
TARGET_SIGKILL ,
TARGET_SIGBUS ,
TARGET_SIGSEGV ,
TARGET_SIGSYS ,
TARGET_SIGPIPE ,
TARGET_SIGALRM ,
TARGET_SIGTERM ,
TARGET_SIGURG ,
TARGET_SIGSTOP ,
TARGET_SIGTSTP ,
TARGET_SIGCONT ,
TARGET_SIGCHLD ,
TARGET_SIGTTIN ,
TARGET_SIGTTOU ,
TARGET_SIGIO ,
TARGET_SIGXCPU ,
TARGET_SIGXFSZ ,
TARGET_SIGVTALRM ,
TARGET_SIGPROF ,
TARGET_SIGWINCH ,
- 1 , /* SIGLOST */
TARGET_SIGUSR1 ,
TARGET_SIGUSR2 ,
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# ifdef TARGET_SIGPWR
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TARGET_SIGPWR ,
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# else
- 1 ,
# endif
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- 1 , /* SIGPOLL */
- 1 ,
- 1 ,
- 1 ,
- 1 ,
- 1 ,
- 1 ,
- 1 ,
- 1 ,
- 1 ,
- 1 ,
- 1 ,
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# ifdef __SIGRTMIN
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__SIGRTMIN + 1 ,
__SIGRTMIN + 2 ,
__SIGRTMIN + 3 ,
__SIGRTMIN + 4 ,
__SIGRTMIN + 5 ,
__SIGRTMIN + 6 ,
__SIGRTMIN + 7 ,
__SIGRTMIN + 8 ,
__SIGRTMIN + 9 ,
__SIGRTMIN + 10 ,
__SIGRTMIN + 11 ,
__SIGRTMIN + 12 ,
__SIGRTMIN + 13 ,
__SIGRTMIN + 14 ,
__SIGRTMIN + 15 ,
__SIGRTMIN + 16 ,
__SIGRTMIN + 17 ,
__SIGRTMIN + 18 ,
__SIGRTMIN + 19 ,
__SIGRTMIN + 20 ,
__SIGRTMIN + 21 ,
__SIGRTMIN + 22 ,
__SIGRTMIN + 23 ,
__SIGRTMIN + 24 ,
__SIGRTMIN + 25 ,
__SIGRTMIN + 26 ,
__SIGRTMIN + 27 ,
__SIGRTMIN + 28 ,
__SIGRTMIN + 29 ,
__SIGRTMIN + 30 ,
__SIGRTMIN + 31 ,
- 1 , /* SIGCANCEL */
__SIGRTMIN ,
__SIGRTMIN + 32 ,
__SIGRTMIN + 33 ,
__SIGRTMIN + 34 ,
__SIGRTMIN + 35 ,
__SIGRTMIN + 36 ,
__SIGRTMIN + 37 ,
__SIGRTMIN + 38 ,
__SIGRTMIN + 39 ,
__SIGRTMIN + 40 ,
__SIGRTMIN + 41 ,
__SIGRTMIN + 42 ,
__SIGRTMIN + 43 ,
__SIGRTMIN + 44 ,
__SIGRTMIN + 45 ,
__SIGRTMIN + 46 ,
__SIGRTMIN + 47 ,
__SIGRTMIN + 48 ,
__SIGRTMIN + 49 ,
__SIGRTMIN + 50 ,
__SIGRTMIN + 51 ,
__SIGRTMIN + 52 ,
__SIGRTMIN + 53 ,
__SIGRTMIN + 54 ,
__SIGRTMIN + 55 ,
__SIGRTMIN + 56 ,
__SIGRTMIN + 57 ,
__SIGRTMIN + 58 ,
__SIGRTMIN + 59 ,
__SIGRTMIN + 60 ,
__SIGRTMIN + 61 ,
__SIGRTMIN + 62 ,
__SIGRTMIN + 63 ,
__SIGRTMIN + 64 ,
__SIGRTMIN + 65 ,
__SIGRTMIN + 66 ,
__SIGRTMIN + 67 ,
__SIGRTMIN + 68 ,
__SIGRTMIN + 69 ,
__SIGRTMIN + 70 ,
__SIGRTMIN + 71 ,
__SIGRTMIN + 72 ,
__SIGRTMIN + 73 ,
__SIGRTMIN + 74 ,
__SIGRTMIN + 75 ,
__SIGRTMIN + 76 ,
__SIGRTMIN + 77 ,
__SIGRTMIN + 78 ,
__SIGRTMIN + 79 ,
__SIGRTMIN + 80 ,
__SIGRTMIN + 81 ,
__SIGRTMIN + 82 ,
__SIGRTMIN + 83 ,
__SIGRTMIN + 84 ,
__SIGRTMIN + 85 ,
__SIGRTMIN + 86 ,
__SIGRTMIN + 87 ,
__SIGRTMIN + 88 ,
__SIGRTMIN + 89 ,
__SIGRTMIN + 90 ,
__SIGRTMIN + 91 ,
__SIGRTMIN + 92 ,
__SIGRTMIN + 93 ,
__SIGRTMIN + 94 ,
__SIGRTMIN + 95 ,
- 1 , /* SIGINFO */
- 1 , /* UNKNOWN */
- 1 , /* DEFAULT */
- 1 ,
- 1 ,
- 1 ,
- 1 ,
- 1 ,
- 1
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# endif
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};
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# else
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/* In system mode we only need SIGINT and SIGTRAP ; other signals
are not yet supported . */
enum {
TARGET_SIGINT = 2 ,
TARGET_SIGTRAP = 5
};
static int gdb_signal_table [] = {
- 1 ,
- 1 ,
TARGET_SIGINT ,
- 1 ,
- 1 ,
TARGET_SIGTRAP
};
# endif
# ifdef CONFIG_USER_ONLY
static int target_signal_to_gdb ( int sig )
{
int i ;
for ( i = 0 ; i < ARRAY_SIZE ( gdb_signal_table ); i ++ )
if ( gdb_signal_table [ i ] == sig )
return i ;
return GDB_SIGNAL_UNKNOWN ;
}
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# endif
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static int gdb_signal_to_target ( int sig )
{
if ( sig < ARRAY_SIZE ( gdb_signal_table ))
return gdb_signal_table [ sig ];
else
return - 1 ;
}
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// # define DEBUG_GDB
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typedef struct GDBRegisterState {
int base_reg ;
int num_regs ;
gdb_reg_cb get_reg ;
gdb_reg_cb set_reg ;
const char * xml ;
struct GDBRegisterState * next ;
} GDBRegisterState ;
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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 * c_cpu ; /* current CPU for step/continue ops */
CPUState * g_cpu ; /* current CPU for other ops */
CPUState * query_cpu ; /* for q{f|s}ThreadInfo */
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enum RSState state ; /* parsing state */
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char line_buf [ MAX_PACKET_LENGTH ];
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int line_buf_index ;
int line_csum ;
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uint8_t last_packet [ MAX_PACKET_LENGTH + 4 ];
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int last_packet_len ;
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int signal ;
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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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/* By default use no IRQs and no timers while single stepping so as to
* make single stepping like an ICE HW step .
*/
static int sstep_flags = SSTEP_ENABLE | SSTEP_NOIRQ | SSTEP_NOTIMER ;
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static GDBState * gdbserver_state ;
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/* This is an ugly hack to cope with both new and old gdb .
If gdb sends qXfer : features : read then assume we ' re talking to a newish
gdb that understands target descriptions . */
static int gdb_has_xml ;
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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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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 ) {
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if ( errno == ECONNRESET )
s -> fd = - 1 ;
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if ( errno != EINTR && errno != EAGAIN )
return - 1 ;
} else if ( ret == 0 ) {
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close ( s -> fd );
s -> fd = - 1 ;
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return - 1 ;
} else {
break ;
}
}
return ch ;
}
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# endif
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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 ) {
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gdb_syscall_mode = ( gdbserver_state ? GDB_SYS_ENABLED
: GDB_SYS_DISABLED );
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}
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_binary ( GDBState * s , const char * buf , int len )
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{
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int csum , i ;
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17 years ago
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uint8_t * p ;
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for (;;) {
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p = s -> last_packet ;
* ( p ++ ) = '$' ;
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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17 years ago
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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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/* return -1 if error, 0 if OK */
static int put_packet ( GDBState * s , const char * buf )
{
# ifdef DEBUG_GDB
printf ( "reply='%s' \n " , buf );
# endif
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return put_packet_binary ( s , buf , strlen ( buf ));
}
/* The GDB remote protocol transfers values in target byte order . This means
we can use the raw memory access routines to access the value buffer .
Conveniently , these also handle the case where the buffer is mis - aligned .
*/
# define GET_REG8 ( val ) do { \
stb_p ( mem_buf , val ) ; \
return 1 ; \
} while ( 0 )
# define GET_REG16 ( val ) do { \
stw_p ( mem_buf , val ) ; \
return 2 ; \
} while ( 0 )
# define GET_REG32 ( val ) do { \
stl_p ( mem_buf , val ) ; \
return 4 ; \
} while ( 0 )
# define GET_REG64 ( val ) do { \
stq_p ( mem_buf , val ) ; \
return 8 ; \
} while ( 0 )
# if TARGET_LONG_BITS == 64
# define GET_REGL ( val ) GET_REG64 ( val )
# define ldtul_p ( addr ) ldq_p ( addr )
# else
# define GET_REGL ( val ) GET_REG32 ( val )
# define ldtul_p ( addr ) ldl_p ( addr )
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# endif
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# if defined ( TARGET_I386 )
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# ifdef TARGET_X86_64
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static const int gpr_map [ 16 ] = {
R_EAX , R_EBX , R_ECX , R_EDX , R_ESI , R_EDI , R_EBP , R_ESP ,
8 , 9 , 10 , 11 , 12 , 13 , 14 , 15
};
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# else
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static const int gpr_map [ 8 ] = { 0 , 1 , 2 , 3 , 4 , 5 , 6 , 7 };
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# endif
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# define NUM_CORE_REGS ( CPU_NB_REGS * 2 + 25 )
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
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{
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if ( n < CPU_NB_REGS ) {
GET_REGL ( env -> regs [ gpr_map [ n ]]) ;
} else if ( n >= CPU_NB_REGS + 8 && n < CPU_NB_REGS + 16 ) {
/* FIXME: byteswap float values. */
# ifdef USE_X86LDOUBLE
memcpy ( mem_buf , & env -> fpregs [ n - ( CPU_NB_REGS + 8 )], 10 ) ;
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# else
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memset ( mem_buf , 0 , 10 ) ;
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# endif
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return 10 ;
} else if ( n >= CPU_NB_REGS + 24 ) {
n -= CPU_NB_REGS + 24 ;
if ( n < CPU_NB_REGS ) {
stq_p ( mem_buf , env -> xmm_regs [ n ]. XMM_Q ( 0 )) ;
stq_p ( mem_buf + 8 , env -> xmm_regs [ n ]. XMM_Q ( 1 )) ;
return 16 ;
} else if ( n == CPU_NB_REGS ) {
GET_REG32 ( env -> mxcsr ) ;
}
} else {
n -= CPU_NB_REGS ;
switch ( n ) {
case 0 : GET_REGL ( env -> eip ) ;
case 1 : GET_REG32 ( env -> eflags ) ;
case 2 : GET_REG32 ( env -> segs [ R_CS ]. selector ) ;
case 3 : GET_REG32 ( env -> segs [ R_SS ]. selector ) ;
case 4 : GET_REG32 ( env -> segs [ R_DS ]. selector ) ;
case 5 : GET_REG32 ( env -> segs [ R_ES ]. selector ) ;
case 6 : GET_REG32 ( env -> segs [ R_FS ]. selector ) ;
case 7 : GET_REG32 ( env -> segs [ R_GS ]. selector ) ;
/* 8...15 x87 regs. */
case 16 : GET_REG32 ( env -> fpuc ) ;
case 17 : GET_REG32 (( env -> fpus & ~ 0x3800 ) | ( env -> fpstt & 0x7 ) << 11 ) ;
case 18 : GET_REG32 ( 0 ) ; /* ftag */
case 19 : GET_REG32 ( 0 ) ; /* fiseg */
case 20 : GET_REG32 ( 0 ) ; /* fioff */
case 21 : GET_REG32 ( 0 ) ; /* foseg */
case 22 : GET_REG32 ( 0 ) ; /* fooff */
case 23 : GET_REG32 ( 0 ) ; /* fop */
/* 24+ xmm regs. */
}
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}
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return 0 ;
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}
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static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int i )
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{
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uint32_t tmp ;
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if ( i < CPU_NB_REGS ) {
env -> regs [ gpr_map [ i ]] = ldtul_p ( mem_buf ) ;
return sizeof ( target_ulong ) ;
} else if ( i >= CPU_NB_REGS + 8 && i < CPU_NB_REGS + 16 ) {
i -= CPU_NB_REGS + 8 ;
# ifdef USE_X86LDOUBLE
memcpy ( & env -> fpregs [ i ], mem_buf , 10 ) ;
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# endif
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return 10 ;
} else if ( i >= CPU_NB_REGS + 24 ) {
i -= CPU_NB_REGS + 24 ;
if ( i < CPU_NB_REGS ) {
env -> xmm_regs [ i ]. XMM_Q ( 0 ) = ldq_p ( mem_buf ) ;
env -> xmm_regs [ i ]. XMM_Q ( 1 ) = ldq_p ( mem_buf + 8 ) ;
return 16 ;
} else if ( i == CPU_NB_REGS ) {
env -> mxcsr = ldl_p ( mem_buf ) ;
return 4 ;
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}
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} else {
i -= CPU_NB_REGS ;
switch ( i ) {
case 0 : env -> eip = ldtul_p ( mem_buf ) ; return sizeof ( target_ulong ) ;
case 1 : env -> eflags = ldl_p ( mem_buf ) ; return 4 ;
# if defined ( CONFIG_USER_ONLY )
# define LOAD_SEG ( index , sreg ) \
tmp = ldl_p ( mem_buf ) ;\
if ( tmp != env -> segs [ sreg ]. selector ) \
cpu_x86_load_seg ( env , sreg , tmp ) ;
# else
/* FIXME : Honor segment registers . Needs to avoid raising an exception
when the selector is invalid . */
# define LOAD_SEG ( index , sreg ) do {} while ( 0 )
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# endif
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case 2 : LOAD_SEG ( 10 , R_CS ); return 4 ;
case 3 : LOAD_SEG ( 11 , R_SS ); return 4 ;
case 4 : LOAD_SEG ( 12 , R_DS ); return 4 ;
case 5 : LOAD_SEG ( 13 , R_ES ); return 4 ;
case 6 : LOAD_SEG ( 14 , R_FS ); return 4 ;
case 7 : LOAD_SEG ( 15 , R_GS ); return 4 ;
/* 8...15 x87 regs. */
case 16 : env -> fpuc = ldl_p ( mem_buf ); return 4 ;
case 17 :
tmp = ldl_p ( mem_buf );
env -> fpstt = ( tmp >> 11 ) & 7 ;
env -> fpus = tmp & ~ 0x3800 ;
return 4 ;
case 18 : /* ftag */ return 4 ;
case 19 : /* fiseg */ return 4 ;
case 20 : /* fioff */ return 4 ;
case 21 : /* foseg */ return 4 ;
case 22 : /* fooff */ return 4 ;
case 23 : /* fop */ return 4 ;
/* 24+ xmm regs. */
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}
}
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/* Unrecognised register. */
return 0 ;
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}
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# elif defined ( TARGET_PPC )
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# define NUM_CORE_REGS 71
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static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
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{
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if ( n < 32 ) {
/* gprs */
GET_REGL ( env -> gpr [ n ]);
} else if ( n < 64 ) {
/* fprs */
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stfq_p ( mem_buf , env -> fpr [ n - 32 ]);
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return 8 ;
} else {
switch ( n ) {
case 64 : GET_REGL ( env -> nip );
case 65 : GET_REGL ( env -> msr );
case 66 :
{
uint32_t cr = 0 ;
int i ;
for ( i = 0 ; i < 8 ; i ++ )
cr |= env -> crf [ i ] << ( 32 - (( i + 1 ) * 4 ));
GET_REG32 ( cr );
}
case 67 : GET_REGL ( env -> lr );
case 68 : GET_REGL ( env -> ctr );
648
case 69 : GET_REGL ( env -> xer );
649
650
651
652
653
case 70 : GET_REG32 ( 0 ); /* fpscr */
}
}
return 0 ;
}
654
655
656
657
658
659
660
661
662
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
{
if ( n < 32 ) {
/* gprs */
env -> gpr [ n ] = ldtul_p ( mem_buf );
return sizeof ( target_ulong );
} else if ( n < 64 ) {
/* fprs */
663
env -> fpr [ n - 32 ] = ldfq_p ( mem_buf );
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
return 8 ;
} else {
switch ( n ) {
case 64 :
env -> nip = ldtul_p ( mem_buf );
return sizeof ( target_ulong );
case 65 :
ppc_store_msr ( env , ldtul_p ( mem_buf ));
return sizeof ( target_ulong );
case 66 :
{
uint32_t cr = ldl_p ( mem_buf );
int i ;
for ( i = 0 ; i < 8 ; i ++ )
env -> crf [ i ] = ( cr >> ( 32 - (( i + 1 ) * 4 ))) & 0xF ;
return 4 ;
}
case 67 :
env -> lr = ldtul_p ( mem_buf );
return sizeof ( target_ulong );
case 68 :
env -> ctr = ldtul_p ( mem_buf );
return sizeof ( target_ulong );
case 69 :
688
689
env -> xer = ldtul_p ( mem_buf );
return sizeof ( target_ulong );
690
691
692
693
694
695
case 70 :
/* fpscr */
return 4 ;
}
}
return 0 ;
696
}
697
698
# elif defined ( TARGET_SPARC )
699
700
701
# if defined ( TARGET_SPARC64 ) && ! defined ( TARGET_ABI32 )
# define NUM_CORE_REGS 86
702
# else
703
# define NUM_CORE_REGS 72
704
# endif
705
706
# ifdef TARGET_ABI32
707
# define GET_REGA ( val ) GET_REG32 ( val )
708
# else
709
# define GET_REGA ( val ) GET_REGL ( val )
710
# endif
711
712
713
714
715
716
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
{
if ( n < 8 ) {
/* g0..g7 */
GET_REGA ( env -> gregs [ n ]);
717
}
718
719
720
if ( n < 32 ) {
/* register window */
GET_REGA ( env -> regwptr [ n - 8 ]);
721
}
722
723
724
725
# if defined ( TARGET_ABI32 ) || ! defined ( TARGET_SPARC64 )
if ( n < 64 ) {
/* fprs */
GET_REG32 ( * (( uint32_t * ) & env -> fpr [ n - 32 ]));
726
727
}
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
728
729
730
731
732
733
734
735
736
switch ( n ) {
case 64 : GET_REGA ( env -> y );
case 65 : GET_REGA ( GET_PSR ( env ));
case 66 : GET_REGA ( env -> wim );
case 67 : GET_REGA ( env -> tbr );
case 68 : GET_REGA ( env -> pc );
case 69 : GET_REGA ( env -> npc );
case 70 : GET_REGA ( env -> fsr );
case 71 : GET_REGA ( 0 ); /* csr */
737
default : GET_REGA ( 0 );
738
}
739
# else
740
741
742
743
744
745
746
if ( n < 64 ) {
/* f0-f31 */
GET_REG32 ( * (( uint32_t * ) & env -> fpr [ n - 32 ]));
}
if ( n < 80 ) {
/* f32-f62 (double width, even numbers only) */
uint64_t val ;
747
748
749
750
val = ( uint64_t ) * (( uint32_t * ) & env -> fpr [( n - 64 ) * 2 + 32 ]) << 32 ;
val |= * (( uint32_t * ) & env -> fpr [( n - 64 ) * 2 + 33 ]);
GET_REG64 ( val );
751
}
752
753
754
755
switch ( n ) {
case 80 : GET_REGL ( env -> pc );
case 81 : GET_REGL ( env -> npc );
case 82 : GET_REGL ((( uint64_t ) GET_CCR ( env ) << 32 ) |
756
757
758
(( env -> asi & 0xff ) << 24 ) |
(( env -> pstate & 0xfff ) << 8 ) |
GET_CWP64 ( env ));
759
760
761
762
case 83 : GET_REGL ( env -> fsr );
case 84 : GET_REGL ( env -> fprs );
case 85 : GET_REGL ( env -> y );
}
763
# endif
764
return 0 ;
765
766
}
767
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
768
{
769
770
771
772
# if defined ( TARGET_ABI32 )
abi_ulong tmp ;
tmp = ldl_p ( mem_buf );
773
# else
774
775
776
target_ulong tmp ;
tmp = ldtul_p ( mem_buf );
777
# endif
778
779
780
781
782
783
784
if ( n < 8 ) {
/* g0..g7 */
env -> gregs [ n ] = tmp ;
} else if ( n < 32 ) {
/* register window */
env -> regwptr [ n - 8 ] = tmp ;
785
}
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
# if defined ( TARGET_ABI32 ) || ! defined ( TARGET_SPARC64 )
else if ( n < 64 ) {
/* fprs */
* (( uint32_t * ) & env -> fpr [ n - 32 ]) = tmp ;
} else {
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
switch ( n ) {
case 64 : env -> y = tmp ; break ;
case 65 : PUT_PSR ( env , tmp ); break ;
case 66 : env -> wim = tmp ; break ;
case 67 : env -> tbr = tmp ; break ;
case 68 : env -> pc = tmp ; break ;
case 69 : env -> npc = tmp ; break ;
case 70 : env -> fsr = tmp ; break ;
default : return 0 ;
}
802
}
803
return 4 ;
804
# else
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
else if ( n < 64 ) {
/* f0-f31 */
env -> fpr [ n ] = ldfl_p ( mem_buf );
return 4 ;
} else if ( n < 80 ) {
/* f32-f62 (double width, even numbers only) */
* (( uint32_t * ) & env -> fpr [( n - 64 ) * 2 + 32 ]) = tmp >> 32 ;
* (( uint32_t * ) & env -> fpr [( n - 64 ) * 2 + 33 ]) = tmp ;
} else {
switch ( n ) {
case 80 : env -> pc = tmp ; break ;
case 81 : env -> npc = tmp ; break ;
case 82 :
PUT_CCR ( env , tmp >> 32 );
env -> asi = ( tmp >> 24 ) & 0xff ;
env -> pstate = ( tmp >> 8 ) & 0xfff ;
PUT_CWP64 ( env , tmp & 0xff );
break ;
case 83 : env -> fsr = tmp ; break ;
case 84 : env -> fprs = tmp ; break ;
case 85 : env -> y = tmp ; break ;
default : return 0 ;
}
828
}
829
return 8 ;
830
# endif
831
}
832
# elif defined ( TARGET_ARM )
833
834
835
836
837
838
839
840
/* Old gdb always expect FPA registers . Newer ( xml - aware ) gdb only expect
whatever the target description contains . Due to a historical mishap
the FPA registers appear in between core integer regs and the CPSR .
We hack round this by giving the FPA regs zero size when talking to a
newer gdb . */
# define NUM_CORE_REGS 26
# define GDB_CORE_XML "arm-core.xml"
841
842
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
843
{
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
if ( n < 16 ) {
/* Core integer register. */
GET_REG32 ( env -> regs [ n ]);
}
if ( n < 24 ) {
/* FPA registers. */
if ( gdb_has_xml )
return 0 ;
memset ( mem_buf , 0 , 12 );
return 12 ;
}
switch ( n ) {
case 24 :
/* FPA status register. */
if ( gdb_has_xml )
return 0 ;
GET_REG32 ( 0 );
case 25 :
/* CPSR */
GET_REG32 ( cpsr_read ( env ));
}
/* Unknown register. */
return 0 ;
867
}
868
869
870
871
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
{
uint32_t tmp ;
872
873
tmp = ldl_p ( mem_buf );
874
875
876
877
878
/* Mask out low bit of PC to workaround gdb bugs . This will probably
cause problems if we ever implement the Jazelle DBX extensions . */
if ( n == 15 )
tmp &= ~ 1 ;
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
if ( n < 16 ) {
/* Core integer register. */
env -> regs [ n ] = tmp ;
return 4 ;
}
if ( n < 24 ) { /* 16-23 */
/* FPA registers (ignored). */
if ( gdb_has_xml )
return 0 ;
return 12 ;
}
switch ( n ) {
case 24 :
/* FPA status register (ignored). */
if ( gdb_has_xml )
return 0 ;
return 4 ;
case 25 :
/* CPSR */
cpsr_write ( env , tmp , 0xffffffff );
return 4 ;
}
/* Unknown register. */
return 0 ;
}
905
906
# elif defined ( TARGET_M68K )
907
908
# define NUM_CORE_REGS 18
909
910
# define GDB_CORE_XML "cf-core.xml"
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
{
if ( n < 8 ) {
/* D0-D7 */
GET_REG32 ( env -> dregs [ n ]);
} else if ( n < 16 ) {
/* A0-A7 */
GET_REG32 ( env -> aregs [ n - 8 ]);
} else {
switch ( n ) {
case 16 : GET_REG32 ( env -> sr );
case 17 : GET_REG32 ( env -> pc );
}
}
/* FP registers not included here because they vary between
ColdFire and m68k . Use XML bits for these . */
return 0 ;
}
ths
authored
18 years ago
930
931
932
933
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
{
uint32_t tmp ;
ths
authored
18 years ago
934
935
tmp = ldl_p ( mem_buf );
ths
authored
18 years ago
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
if ( n < 8 ) {
/* D0-D7 */
env -> dregs [ n ] = tmp ;
} else if ( n < 8 ) {
/* A0-A7 */
env -> aregs [ n - 8 ] = tmp ;
} else {
switch ( n ) {
case 16 : env -> sr = tmp ; break ;
case 17 : env -> pc = tmp ; break ;
default : return 0 ;
}
}
return 4 ;
}
# elif defined ( TARGET_MIPS )
ths
authored
17 years ago
953
954
# define NUM_CORE_REGS 73
ths
authored
17 years ago
955
956
957
958
959
960
961
962
963
964
965
966
967
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971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
{
if ( n < 32 ) {
GET_REGL ( env -> active_tc . gpr [ n ]);
}
if ( env -> CP0_Config1 & ( 1 << CP0C1_FP )) {
if ( n >= 38 && n < 70 ) {
if ( env -> CP0_Status & ( 1 << CP0St_FR ))
GET_REGL ( env -> active_fpu . fpr [ n - 38 ]. d );
else
GET_REGL ( env -> active_fpu . fpr [ n - 38 ]. w [ FP_ENDIAN_IDX ]);
}
switch ( n ) {
case 70 : GET_REGL (( int32_t ) env -> active_fpu . fcr31 );
case 71 : GET_REGL (( int32_t ) env -> active_fpu . fcr0 );
}
}
switch ( n ) {
case 32 : GET_REGL (( int32_t ) env -> CP0_Status );
case 33 : GET_REGL ( env -> active_tc . LO [ 0 ]);
case 34 : GET_REGL ( env -> active_tc . HI [ 0 ]);
case 35 : GET_REGL ( env -> CP0_BadVAddr );
case 36 : GET_REGL (( int32_t ) env -> CP0_Cause );
case 37 : GET_REGL ( env -> active_tc . PC );
case 72 : GET_REGL ( 0 ); /* fp */
case 89 : GET_REGL (( int32_t ) env -> CP0_PRid );
}
if ( n >= 73 && n <= 88 ) {
/* 16 embedded regs. */
GET_REGL ( 0 );
}
987
988
return 0 ;
989
990
}
ths
authored
18 years ago
991
992
993
994
995
996
997
998
999
/* 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
17 years ago
1000
set_float_rounding_mode ( ieee_rm [ env -> active_fpu . fcr31 & 3 ], & env -> active_fpu . fp_status )
ths
authored
18 years ago
1001
1002
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
1003
{
1004
target_ulong tmp ;
1005
1006
tmp = ldtul_p ( mem_buf );
1007
1008
1009
1010
1011
1012
1013
1014
if ( n < 32 ) {
env -> active_tc . gpr [ n ] = tmp ;
return sizeof ( target_ulong );
}
if ( env -> CP0_Config1 & ( 1 << CP0C1_FP )
&& n >= 38 && n < 73 ) {
if ( n < 70 ) {
ths
authored
17 years ago
1015
if ( env -> CP0_Status & ( 1 << CP0St_FR ))
1016
env -> active_fpu . fpr [ n - 38 ]. d = tmp ;
ths
authored
17 years ago
1017
else
1018
1019
1020
1021
1022
1023
1024
env -> active_fpu . fpr [ n - 38 ]. w [ FP_ENDIAN_IDX ] = tmp ;
}
switch ( n ) {
case 70 :
env -> active_fpu . fcr31 = tmp & 0xFF83FFFF ;
/* set rounding mode */
RESTORE_ROUNDING_MODE ;
ths
authored
18 years ago
1025
# ifndef CONFIG_SOFTFLOAT
1026
1027
/* no floating point exception for native float */
SET_FP_ENABLE ( env -> active_fpu . fcr31 , 0 );
ths
authored
18 years ago
1028
# endif
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
break ;
case 71 : env -> active_fpu . fcr0 = tmp ; break ;
}
return sizeof ( target_ulong );
}
switch ( n ) {
case 32 : env -> CP0_Status = tmp ; break ;
case 33 : env -> active_tc . LO [ 0 ] = tmp ; break ;
case 34 : env -> active_tc . HI [ 0 ] = tmp ; break ;
case 35 : env -> CP0_BadVAddr = tmp ; break ;
case 36 : env -> CP0_Cause = tmp ; break ;
case 37 : env -> active_tc . PC = tmp ; break ;
case 72 : /* fp, ignored */ break ;
default :
if ( n > 89 )
return 0 ;
/* Other registers are readonly. Ignore writes. */
break ;
}
return sizeof ( target_ulong );
1050
}
1051
# elif defined ( TARGET_SH4 )
ths
authored
18 years ago
1052
1053
/* Hint: Use "set architecture sh4" in GDB to see fpu registers */
1054
1055
1056
/* FIXME: We should use XML for this. */
# define NUM_CORE_REGS 59
ths
authored
18 years ago
1057
1058
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
1059
{
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
if ( n < 8 ) {
if (( env -> sr & ( SR_MD | SR_RB )) == ( SR_MD | SR_RB )) {
GET_REGL ( env -> gregs [ n + 16 ]);
} else {
GET_REGL ( env -> gregs [ n ]);
}
} else if ( n < 16 ) {
GET_REGL ( env -> gregs [ n - 8 ]);
} else if ( n >= 25 && n < 41 ) {
GET_REGL ( env -> fregs [( n - 25 ) + (( env -> fpscr & FPSCR_FR ) ? 16 : 0 )]);
} else if ( n >= 43 && n < 51 ) {
GET_REGL ( env -> gregs [ n - 43 ]);
} else if ( n >= 51 && n < 59 ) {
GET_REGL ( env -> gregs [ n - ( 51 - 16 )]);
}
switch ( n ) {
case 16 : GET_REGL ( env -> pc );
case 17 : GET_REGL ( env -> pr );
case 18 : GET_REGL ( env -> gbr );
case 19 : GET_REGL ( env -> vbr );
case 20 : GET_REGL ( env -> mach );
case 21 : GET_REGL ( env -> macl );
case 22 : GET_REGL ( env -> sr );
case 23 : GET_REGL ( env -> fpul );
case 24 : GET_REGL ( env -> fpscr );
case 41 : GET_REGL ( env -> ssr );
case 42 : GET_REGL ( env -> spc );
}
return 0 ;
1090
1091
}
1092
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
1093
{
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
uint32_t tmp ;
tmp = ldl_p ( mem_buf );
if ( n < 8 ) {
if (( env -> sr & ( SR_MD | SR_RB )) == ( SR_MD | SR_RB )) {
env -> gregs [ n + 16 ] = tmp ;
} else {
env -> gregs [ n ] = tmp ;
}
return 4 ;
} else if ( n < 16 ) {
env -> gregs [ n - 8 ] = tmp ;
return 4 ;
} else if ( n >= 25 && n < 41 ) {
env -> fregs [( n - 25 ) + (( env -> fpscr & FPSCR_FR ) ? 16 : 0 )] = tmp ;
} else if ( n >= 43 && n < 51 ) {
env -> gregs [ n - 43 ] = tmp ;
return 4 ;
} else if ( n >= 51 && n < 59 ) {
env -> gregs [ n - ( 51 - 16 )] = tmp ;
return 4 ;
}
switch ( n ) {
case 16 : env -> pc = tmp ;
case 17 : env -> pr = tmp ;
case 18 : env -> gbr = tmp ;
case 19 : env -> vbr = tmp ;
case 20 : env -> mach = tmp ;
case 21 : env -> macl = tmp ;
case 22 : env -> sr = tmp ;
case 23 : env -> fpul = tmp ;
case 24 : env -> fpscr = tmp ;
case 41 : env -> ssr = tmp ;
case 42 : env -> spc = tmp ;
default : return 0 ;
}
return 4 ;
1133
}
ths
authored
17 years ago
1134
1135
# elif defined ( TARGET_CRIS )
1136
1137
1138
# define NUM_CORE_REGS 49
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
ths
authored
17 years ago
1139
{
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
uint8_t srs ;
srs = env -> pregs [ PR_SRS ];
if ( n < 16 ) {
GET_REG32 ( env -> regs [ n ]);
}
if ( n >= 21 && n < 32 ) {
GET_REG32 ( env -> pregs [ n - 16 ]);
}
if ( n >= 33 && n < 49 ) {
GET_REG32 ( env -> sregs [ srs ][ n - 33 ]);
}
switch ( n ) {
case 16 : GET_REG8 ( env -> pregs [ 0 ]);
case 17 : GET_REG8 ( env -> pregs [ 1 ]);
case 18 : GET_REG32 ( env -> pregs [ 2 ]);
case 19 : GET_REG8 ( srs );
case 20 : GET_REG16 ( env -> pregs [ 4 ]);
case 32 : GET_REG32 ( env -> pc );
}
return 0 ;
ths
authored
17 years ago
1163
}
1164
1165
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
ths
authored
17 years ago
1166
{
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
uint32_t tmp ;
if ( n > 49 )
return 0 ;
tmp = ldl_p ( mem_buf );
if ( n < 16 ) {
env -> regs [ n ] = tmp ;
}
1178
1179
1180
1181
1182
if ( n >= 21 && n < 32 ) {
env -> pregs [ n - 16 ] = tmp ;
}
/* FIXME: Should support function regs be writable? */
1183
1184
1185
switch ( n ) {
case 16 : return 1 ;
case 17 : return 1 ;
1186
case 18 : env -> pregs [ PR_PID ] = tmp ; break ;
1187
1188
1189
1190
1191
1192
case 19 : return 1 ;
case 20 : return 2 ;
case 32 : env -> pc = tmp ; break ;
}
return 4 ;
ths
authored
17 years ago
1193
}
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
# elif defined ( TARGET_ALPHA )
# define NUM_CORE_REGS 65
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
{
if ( n < 31 ) {
GET_REGL ( env -> ir [ n ]);
}
else if ( n == 31 ) {
GET_REGL ( 0 );
}
else if ( n < 63 ) {
uint64_t val ;
val =* (( uint64_t * ) & env -> fir [ n - 32 ]);
GET_REGL ( val );
}
else if ( n == 63 ) {
GET_REGL ( env -> fpcr );
}
else if ( n == 64 ) {
GET_REGL ( env -> pc );
}
else {
GET_REGL ( 0 );
}
return 0 ;
}
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
{
target_ulong tmp ;
tmp = ldtul_p ( mem_buf );
if ( n < 31 ) {
env -> ir [ n ] = tmp ;
}
if ( n > 31 && n < 63 ) {
env -> fir [ n - 32 ] = ldfl_p ( mem_buf );
}
if ( n == 64 ) {
env -> pc = tmp ;
}
return 8 ;
}
1244
1245
1246
1247
1248
# else
# define NUM_CORE_REGS 0
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
ths
authored
17 years ago
1249
{
1250
return 0 ;
ths
authored
17 years ago
1251
1252
}
1253
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
ths
authored
17 years ago
1254
{
1255
1256
return 0 ;
}
ths
authored
17 years ago
1257
1258
# endif
ths
authored
17 years ago
1259
1260
static int num_g_regs = NUM_CORE_REGS ;
ths
authored
17 years ago
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
# ifdef GDB_CORE_XML
/* Encode data using the encoding for 'x' packets. */
static int memtox ( char * buf , const char * mem , int len )
{
char * p = buf ;
char c ;
while ( len -- ) {
c = * ( mem ++ );
switch ( c ) {
case '#' : case '$' : case '*' : case '}' :
* ( p ++ ) = '}' ;
* ( p ++ ) = c ^ 0x20 ;
break ;
default :
* ( p ++ ) = c ;
break ;
}
}
return p - buf ;
}
ths
authored
17 years ago
1283
1284
static const char * get_feature_xml ( const char * p , const char ** newp )
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
{
extern const char * const xml_builtin [][ 2 ];
size_t len ;
int i ;
const char * name ;
static char target_xml [ 1024 ];
len = 0 ;
while ( p [ len ] && p [ len ] != ':' )
len ++ ;
* newp = p + len ;
name = NULL ;
if ( strncmp ( p , "target.xml" , len ) == 0 ) {
/* Generate the XML description for this CPU. */
if ( ! target_xml [ 0 ]) {
GDBRegisterState * r ;
1303
1304
1305
1306
1307
1308
snprintf ( target_xml , sizeof ( target_xml ),
"<?xml version= \" 1.0 \" ?>"
"<!DOCTYPE target SYSTEM \" gdb-target.dtd \" >"
"<target>"
"<xi:include href= \" %s \" />" ,
GDB_CORE_XML );
1309
1310
for ( r = first_cpu -> gdb_regs ; r ; r = r -> next ) {
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
strcat ( target_xml , "<xi:include href= \" " );
strcat ( target_xml , r -> xml );
strcat ( target_xml , " \" />" );
}
strcat ( target_xml , "</target>" );
}
return target_xml ;
}
for ( i = 0 ; ; i ++ ) {
name = xml_builtin [ i ][ 0 ];
if ( ! name || ( strncmp ( name , p , len ) == 0 && strlen ( name ) == len ))
break ;
}
return name ? xml_builtin [ i ][ 1 ] : NULL ;
}
# endif
ths
authored
17 years ago
1327
1328
1329
1330
static int gdb_read_register ( CPUState * env , uint8_t * mem_buf , int reg )
{
GDBRegisterState * r ;
ths
authored
17 years ago
1331
1332
1333
if ( reg < NUM_CORE_REGS )
return cpu_gdb_read_register ( env , mem_buf , reg );
ths
authored
17 years ago
1334
1335
1336
1337
1338
1339
1340
for ( r = env -> gdb_regs ; r ; r = r -> next ) {
if ( r -> base_reg <= reg && reg < r -> base_reg + r -> num_regs ) {
return r -> get_reg ( env , mem_buf , reg - r -> base_reg );
}
}
return 0 ;
ths
authored
17 years ago
1341
1342
}
1343
static int gdb_write_register ( CPUState * env , uint8_t * mem_buf , int reg )
ths
authored
17 years ago
1344
{
1345
GDBRegisterState * r ;
ths
authored
17 years ago
1346
1347
1348
1349
1350
1351
1352
1353
1354
if ( reg < NUM_CORE_REGS )
return cpu_gdb_write_register ( env , mem_buf , reg );
for ( r = env -> gdb_regs ; r ; r = r -> next ) {
if ( r -> base_reg <= reg && reg < r -> base_reg + r -> num_regs ) {
return r -> set_reg ( env , mem_buf , reg - r -> base_reg );
}
}
1355
1356
1357
return 0 ;
}
1358
1359
1360
1361
1362
1363
1364
1365
1366
/* Register a supplemental set of CPU registers . If g_pos is nonzero it
specifies the first register number and these registers are included in
a standard "g" packet . Direction is relative to gdb , i . e . get_reg is
gdb reading a CPU register , and set_reg is gdb modifying a CPU register .
*/
void gdb_register_coprocessor ( CPUState * env ,
gdb_reg_cb get_reg , gdb_reg_cb set_reg ,
int num_regs , const char * xml , int g_pos )
1367
{
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
GDBRegisterState * s ;
GDBRegisterState ** p ;
static int last_reg = NUM_CORE_REGS ;
s = ( GDBRegisterState * ) qemu_mallocz ( sizeof ( GDBRegisterState ));
s -> base_reg = last_reg ;
s -> num_regs = num_regs ;
s -> get_reg = get_reg ;
s -> set_reg = set_reg ;
s -> xml = xml ;
p = & env -> gdb_regs ;
while ( * p ) {
/* Check for duplicates. */
if ( strcmp (( * p ) -> xml , xml ) == 0 )
return ;
p = & ( * p ) -> next ;
}
/* Add to end of list. */
last_reg += num_regs ;
* p = s ;
if ( g_pos ) {
if ( g_pos != s -> base_reg ) {
fprintf ( stderr , "Error: Bad gdb register numbering for '%s' \n "
"Expected %d got %d \n " , xml , g_pos , s -> base_reg );
} else {
num_g_regs = last_reg ;
}
}
1396
1397
}
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
/* GDB breakpoint/watchpoint types */
# define GDB_BREAKPOINT_SW 0
# define GDB_BREAKPOINT_HW 1
# define GDB_WATCHPOINT_WRITE 2
# define GDB_WATCHPOINT_READ 3
# define GDB_WATCHPOINT_ACCESS 4
# ifndef CONFIG_USER_ONLY
static const int xlat_gdb_type [] = {
[ GDB_WATCHPOINT_WRITE ] = BP_GDB | BP_MEM_WRITE ,
[ GDB_WATCHPOINT_READ ] = BP_GDB | BP_MEM_READ ,
[ GDB_WATCHPOINT_ACCESS ] = BP_GDB | BP_MEM_ACCESS ,
};
# endif
1413
static int gdb_breakpoint_insert ( target_ulong addr , target_ulong len , int type )
1414
{
1415
1416
1417
CPUState * env ;
int err = 0 ;
1418
1419
1420
switch ( type ) {
case GDB_BREAKPOINT_SW :
case GDB_BREAKPOINT_HW :
1421
1422
1423
1424
1425
1426
for ( env = first_cpu ; env != NULL ; env = env -> next_cpu ) {
err = cpu_breakpoint_insert ( env , addr , BP_GDB , NULL );
if ( err )
break ;
}
return err ;
1427
1428
1429
1430
# ifndef CONFIG_USER_ONLY
case GDB_WATCHPOINT_WRITE :
case GDB_WATCHPOINT_READ :
case GDB_WATCHPOINT_ACCESS :
1431
1432
1433
1434
1435
1436
1437
for ( env = first_cpu ; env != NULL ; env = env -> next_cpu ) {
err = cpu_watchpoint_insert ( env , addr , len , xlat_gdb_type [ type ],
NULL );
if ( err )
break ;
}
return err ;
1438
1439
1440
1441
1442
1443
# endif
default :
return - ENOSYS ;
}
}
1444
static int gdb_breakpoint_remove ( target_ulong addr , target_ulong len , int type )
1445
{
1446
1447
1448
CPUState * env ;
int err = 0 ;
1449
1450
1451
switch ( type ) {
case GDB_BREAKPOINT_SW :
case GDB_BREAKPOINT_HW :
1452
1453
1454
1455
1456
1457
for ( env = first_cpu ; env != NULL ; env = env -> next_cpu ) {
err = cpu_breakpoint_remove ( env , addr , BP_GDB );
if ( err )
break ;
}
return err ;
1458
1459
1460
1461
# ifndef CONFIG_USER_ONLY
case GDB_WATCHPOINT_WRITE :
case GDB_WATCHPOINT_READ :
case GDB_WATCHPOINT_ACCESS :
1462
1463
1464
1465
1466
1467
for ( env = first_cpu ; env != NULL ; env = env -> next_cpu ) {
err = cpu_watchpoint_remove ( env , addr , len , xlat_gdb_type [ type ]);
if ( err )
break ;
}
return err ;
1468
1469
1470
1471
1472
1473
# endif
default :
return - ENOSYS ;
}
}
1474
static void gdb_breakpoint_remove_all ( void )
1475
{
1476
1477
1478
1479
CPUState * env ;
for ( env = first_cpu ; env != NULL ; env = env -> next_cpu ) {
cpu_breakpoint_remove_all ( env , BP_GDB );
1480
# ifndef CONFIG_USER_ONLY
1481
cpu_watchpoint_remove_all ( env , BP_GDB );
1482
# endif
1483
}
1484
1485
}
1486
static int gdb_handle_packet ( GDBState * s , const char * line_buf )
1487
{
1488
CPUState * env ;
1489
const char * p ;
1490
int ch , reg_size , type , res , thread ;
1491
1492
1493
char buf [ MAX_PACKET_LENGTH ];
uint8_t mem_buf [ MAX_PACKET_LENGTH ];
uint8_t * registers ;
1494
target_ulong addr , len ;
ths
authored
18 years ago
1495
1496
1497
1498
1499
1500
1501
1502
# ifdef DEBUG_GDB
printf ( "command='%s' \n " , line_buf );
# endif
p = line_buf ;
ch = * p ++ ;
switch ( ch ) {
case '?' :
1503
/* TODO: Make this return the correct value for user-mode. */
1504
snprintf ( buf , sizeof ( buf ), "T%02xthread:%02x;" , GDB_SIGNAL_TRAP ,
1505
s -> c_cpu -> cpu_index + 1 );
1506
put_packet ( s , buf );
1507
1508
1509
1510
/* Remove all the breakpoints when this query is issued ,
* because gdb is doing and initial connect and the state
* should be cleaned up .
*/
1511
gdb_breakpoint_remove_all ();
1512
1513
1514
break ;
case 'c' :
if ( * p != '\0' ) {
1515
addr = strtoull ( p , ( char ** ) & p , 16 );
1516
# if defined ( TARGET_I386 )
1517
s -> c_cpu -> eip = addr ;
1518
# elif defined ( TARGET_PPC )
1519
s -> c_cpu -> nip = addr ;
1520
# elif defined ( TARGET_SPARC )
1521
1522
s -> c_cpu -> pc = addr ;
s -> c_cpu -> npc = addr + 4 ;
1523
# elif defined ( TARGET_ARM )
1524
s -> c_cpu -> regs [ 15 ] = addr ;
1525
# elif defined ( TARGET_SH4 )
1526
s -> c_cpu -> pc = addr ;
ths
authored
18 years ago
1527
# elif defined ( TARGET_MIPS )
1528
s -> c_cpu -> active_tc . PC = addr ;
ths
authored
17 years ago
1529
# elif defined ( TARGET_CRIS )
1530
s -> c_cpu -> pc = addr ;
1531
1532
# elif defined ( TARGET_ALPHA )
s -> c_cpu -> pc = addr ;
1533
# endif
1534
}
1535
s -> signal = 0 ;
1536
gdb_continue ( s );
1537
return RS_IDLE ;
1538
case 'C' :
1539
1540
1541
s -> signal = gdb_signal_to_target ( strtoul ( p , ( char ** ) & p , 16 ));
if ( s -> signal == - 1 )
s -> signal = 0 ;
1542
1543
gdb_continue ( s );
return RS_IDLE ;
1544
1545
1546
1547
1548
1549
case 'k' :
/* Kill the target */
fprintf ( stderr , " \n QEMU: Terminated via GDBstub \n " );
exit ( 0 );
case 'D' :
/* Detach packet */
1550
gdb_breakpoint_remove_all ();
1551
1552
1553
gdb_continue ( s );
put_packet ( s , "OK" );
break ;
1554
1555
case 's' :
if ( * p != '\0' ) {
ths
authored
18 years ago
1556
addr = strtoull ( p , ( char ** ) & p , 16 );
1557
# if defined ( TARGET_I386 )
1558
s -> c_cpu -> eip = addr ;
1559
# elif defined ( TARGET_PPC )
1560
s -> c_cpu -> nip = addr ;
1561
# elif defined ( TARGET_SPARC )
1562
1563
s -> c_cpu -> pc = addr ;
s -> c_cpu -> npc = addr + 4 ;
1564
# elif defined ( TARGET_ARM )
1565
s -> c_cpu -> regs [ 15 ] = addr ;
1566
# elif defined ( TARGET_SH4 )
1567
s -> c_cpu -> pc = addr ;
ths
authored
18 years ago
1568
# elif defined ( TARGET_MIPS )
1569
s -> c_cpu -> active_tc . PC = addr ;
ths
authored
17 years ago
1570
# elif defined ( TARGET_CRIS )
1571
s -> c_cpu -> pc = addr ;
1572
1573
# elif defined ( TARGET_ALPHA )
s -> c_cpu -> pc = addr ;
1574
# endif
1575
}
1576
cpu_single_step ( s -> c_cpu , sstep_flags );
1577
gdb_continue ( s );
1578
return RS_IDLE ;
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
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 )
1595
gdb_current_syscall_cb ( s -> c_cpu , ret , err );
1596
1597
1598
if ( type == 'C' ) {
put_packet ( s , "T02" );
} else {
1599
gdb_continue ( s );
1600
1601
1602
}
}
break ;
1603
case 'g' :
1604
1605
len = 0 ;
for ( addr = 0 ; addr < num_g_regs ; addr ++ ) {
1606
reg_size = gdb_read_register ( s -> g_cpu , mem_buf + len , addr );
1607
1608
1609
len += reg_size ;
}
memtohex ( buf , mem_buf , len );
1610
1611
1612
put_packet ( s , buf );
break ;
case 'G' :
1613
registers = mem_buf ;
1614
1615
len = strlen ( p ) / 2 ;
hextomem (( uint8_t * ) registers , p , len );
1616
for ( addr = 0 ; addr < num_g_regs && len > 0 ; addr ++ ) {
1617
reg_size = gdb_write_register ( s -> g_cpu , registers , addr );
1618
1619
1620
len -= reg_size ;
registers += reg_size ;
}
1621
1622
1623
put_packet ( s , "OK" );
break ;
case 'm' :
1624
addr = strtoull ( p , ( char ** ) & p , 16 );
1625
1626
if ( * p == ',' )
p ++ ;
1627
len = strtoull ( p , NULL , 16 );
1628
if ( cpu_memory_rw_debug ( s -> g_cpu , addr , mem_buf , len , 0 ) != 0 ) {
1629
1630
1631
1632
1633
put_packet ( s , "E14" );
} else {
memtohex ( buf , mem_buf , len );
put_packet ( s , buf );
}
1634
1635
break ;
case 'M' :
1636
addr = strtoull ( p , ( char ** ) & p , 16 );
1637
1638
if ( * p == ',' )
p ++ ;
1639
len = strtoull ( p , ( char ** ) & p , 16 );
1640
if ( * p == ':' )
1641
1642
p ++ ;
hextomem ( mem_buf , p , len );
1643
if ( cpu_memory_rw_debug ( s -> g_cpu , addr , mem_buf , len , 1 ) != 0 )
1644
put_packet ( s , "E14" );
1645
1646
1647
else
put_packet ( s , "OK" );
break ;
1648
1649
1650
1651
1652
1653
1654
case 'p' :
/* Older gdb are really dumb , and don ' t use 'g' if 'p' is avaialable .
This works , but can be very slow . Anything new enough to
understand XML also knows how to use this properly . */
if ( ! gdb_has_xml )
goto unknown_command ;
addr = strtoull ( p , ( char ** ) & p , 16 );
1655
reg_size = gdb_read_register ( s -> g_cpu , mem_buf , addr );
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
if ( reg_size ) {
memtohex ( buf , mem_buf , reg_size );
put_packet ( s , buf );
} else {
put_packet ( s , "E14" );
}
break ;
case 'P' :
if ( ! gdb_has_xml )
goto unknown_command ;
addr = strtoull ( p , ( char ** ) & p , 16 );
if ( * p == '=' )
p ++ ;
reg_size = strlen ( p ) / 2 ;
hextomem ( mem_buf , p , reg_size );
1671
gdb_write_register ( s -> g_cpu , mem_buf , addr );
1672
1673
put_packet ( s , "OK" );
break ;
1674
1675
1676
1677
1678
case 'Z' :
case 'z' :
type = strtoul ( p , ( char ** ) & p , 16 );
if ( * p == ',' )
p ++ ;
1679
addr = strtoull ( p , ( char ** ) & p , 16 );
1680
1681
if ( * p == ',' )
p ++ ;
1682
len = strtoull ( p , ( char ** ) & p , 16 );
1683
if ( ch == 'Z' )
1684
res = gdb_breakpoint_insert ( addr , len , type );
1685
else
1686
res = gdb_breakpoint_remove ( addr , len , type );
1687
1688
1689
if ( res >= 0 )
put_packet ( s , "OK" );
else if ( res == - ENOSYS )
1690
put_packet ( s , "" );
1691
1692
else
put_packet ( s , "E22" );
1693
break ;
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
case 'H' :
type = * p ++ ;
thread = strtoull ( p , ( char ** ) & p , 16 );
if ( thread == - 1 || thread == 0 ) {
put_packet ( s , "OK" );
break ;
}
for ( env = first_cpu ; env != NULL ; env = env -> next_cpu )
if ( env -> cpu_index + 1 == thread )
break ;
if ( env == NULL ) {
put_packet ( s , "E22" );
break ;
}
switch ( type ) {
case 'c' :
s -> c_cpu = env ;
put_packet ( s , "OK" );
break ;
case 'g' :
s -> g_cpu = env ;
put_packet ( s , "OK" );
break ;
default :
put_packet ( s , "E22" );
break ;
}
break ;
case 'T' :
thread = strtoull ( p , ( char ** ) & p , 16 );
# ifndef CONFIG_USER_ONLY
if ( thread > 0 && thread < smp_cpus + 1 )
# else
if ( thread == 1 )
# endif
put_packet ( s , "OK" );
else
put_packet ( s , "E22" );
break ;
1733
case 'q' :
1734
1735
1736
1737
case 'Q' :
/* parse any 'q' packets here */
if ( ! strcmp ( p , "qemu.sstepbits" )) {
/* Query Breakpoint bit definitions */
1738
1739
1740
1741
snprintf ( buf , sizeof ( buf ), "ENABLE=%x,NOIRQ=%x,NOTIMER=%x" ,
SSTEP_ENABLE ,
SSTEP_NOIRQ ,
SSTEP_NOTIMER );
1742
1743
1744
1745
1746
1747
1748
put_packet ( s , buf );
break ;
} else if ( strncmp ( p , "qemu.sstep" , 10 ) == 0 ) {
/* Display or change the sstep_flags */
p += 10 ;
if ( * p != '=' ) {
/* Display current setting */
1749
snprintf ( buf , sizeof ( buf ), "0x%x" , sstep_flags );
1750
1751
1752
1753
1754
1755
1756
1757
put_packet ( s , buf );
break ;
}
p ++ ;
type = strtoul ( p , ( char ** ) & p , 16 );
sstep_flags = type ;
put_packet ( s , "OK" );
break ;
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
} else if ( strcmp ( p , "C" ) == 0 ) {
/* "Current thread" remains vague in the spec , so always return
* the first CPU ( gdb returns the first thread ). */
put_packet ( s , "QC1" );
break ;
} else if ( strcmp ( p , "fThreadInfo" ) == 0 ) {
s -> query_cpu = first_cpu ;
goto report_cpuinfo ;
} else if ( strcmp ( p , "sThreadInfo" ) == 0 ) {
report_cpuinfo :
if ( s -> query_cpu ) {
snprintf ( buf , sizeof ( buf ), "m%x" , s -> query_cpu -> cpu_index + 1 );
put_packet ( s , buf );
s -> query_cpu = s -> query_cpu -> next_cpu ;
} else
put_packet ( s , "l" );
break ;
} else if ( strncmp ( p , "ThreadExtraInfo," , 16 ) == 0 ) {
thread = strtoull ( p + 16 , ( char ** ) & p , 16 );
for ( env = first_cpu ; env != NULL ; env = env -> next_cpu )
if ( env -> cpu_index + 1 == thread ) {
len = snprintf (( char * ) mem_buf , sizeof ( mem_buf ),
"CPU#%d [%s]" , env -> cpu_index ,
env -> halted ? "halted " : "running" );
memtohex ( buf , mem_buf , len );
put_packet ( s , buf );
break ;
}
break ;
1787
1788
1789
}
# ifdef CONFIG_LINUX_USER
else if ( strncmp ( p , "Offsets" , 7 ) == 0 ) {
1790
TaskState * ts = s -> c_cpu -> opaque ;
1791
1792
1793
1794
1795
1796
1797
snprintf ( buf , sizeof ( buf ),
"Text=" TARGET_ABI_FMT_lx ";Data=" TARGET_ABI_FMT_lx
";Bss=" TARGET_ABI_FMT_lx ,
ts -> info -> code_offset ,
ts -> info -> data_offset ,
ts -> info -> data_offset );
1798
1799
1800
1801
put_packet ( s , buf );
break ;
}
# endif
1802
if ( strncmp ( p , "Supported" , 9 ) == 0 ) {
1803
snprintf ( buf , sizeof ( buf ), "PacketSize=%x" , MAX_PACKET_LENGTH );
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
# ifdef GDB_CORE_XML
strcat ( buf , ";qXfer:features:read+" );
# endif
put_packet ( s , buf );
break ;
}
# ifdef GDB_CORE_XML
if ( strncmp ( p , "Xfer:features:read:" , 19 ) == 0 ) {
const char * xml ;
target_ulong total_len ;
gdb_has_xml = 1 ;
p += 19 ;
1817
xml = get_feature_xml ( p , & p );
1818
if ( ! xml ) {
1819
snprintf ( buf , sizeof ( buf ), "E00" );
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
put_packet ( s , buf );
break ;
}
if ( * p == ':' )
p ++ ;
addr = strtoul ( p , ( char ** ) & p , 16 );
if ( * p == ',' )
p ++ ;
len = strtoul ( p , ( char ** ) & p , 16 );
total_len = strlen ( xml );
if ( addr > total_len ) {
1833
snprintf ( buf , sizeof ( buf ), "E00" );
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
put_packet ( s , buf );
break ;
}
if ( len > ( MAX_PACKET_LENGTH - 5 ) / 2 )
len = ( MAX_PACKET_LENGTH - 5 ) / 2 ;
if ( len < total_len - addr ) {
buf [ 0 ] = 'm' ;
len = memtox ( buf + 1 , xml + addr , len );
} else {
buf [ 0 ] = 'l' ;
len = memtox ( buf + 1 , xml + addr , total_len - addr );
}
put_packet_binary ( s , buf , len + 1 );
break ;
}
# endif
/* Unrecognised 'q' command. */
goto unknown_command ;
1853
default :
1854
unknown_command :
1855
1856
1857
1858
1859
1860
1861
1862
/* put empty packet */
buf [ 0 ] = '\0' ;
put_packet ( s , buf );
break ;
}
return RS_IDLE ;
}
1863
1864
1865
1866
1867
1868
void gdb_set_stop_cpu ( CPUState * env )
{
gdbserver_state -> c_cpu = env ;
gdbserver_state -> g_cpu = env ;
}
1869
# ifndef CONFIG_USER_ONLY
1870
1871
static void gdb_vm_stopped ( void * opaque , int reason )
{
1872
1873
GDBState * s = gdbserver_state ;
CPUState * env = s -> c_cpu ;
1874
char buf [ 256 ];
1875
const char * type ;
1876
1877
int ret ;
1878
1879
1880
if ( s -> state == RS_SYSCALL )
return ;
1881
/* disable single step if it was enable */
1882
cpu_single_step ( env , 0 );
1883
1884
if ( reason == EXCP_DEBUG ) {
1885
1886
if ( env -> watchpoint_hit ) {
switch ( env -> watchpoint_hit -> flags & BP_MEM_ACCESS ) {
1887
case BP_MEM_READ :
1888
1889
type = "r" ;
break ;
1890
case BP_MEM_ACCESS :
1891
1892
1893
1894
1895
1896
type = "a" ;
break ;
default :
type = "" ;
break ;
}
1897
1898
snprintf ( buf , sizeof ( buf ),
"T%02xthread:%02x;%swatch:" TARGET_FMT_lx ";" ,
1899
GDB_SIGNAL_TRAP , env -> cpu_index + 1 , type ,
1900
env -> watchpoint_hit -> vaddr );
1901
put_packet ( s , buf );
1902
env -> watchpoint_hit = NULL ;
1903
1904
return ;
}
1905
tb_flush ( env );
1906
ret = GDB_SIGNAL_TRAP ;
1907
} else if ( reason == EXCP_INTERRUPT ) {
1908
ret = GDB_SIGNAL_INT ;
1909
} else {
1910
ret = 0 ;
1911
}
1912
snprintf ( buf , sizeof ( buf ), "T%02xthread:%02x;" , ret , env -> cpu_index + 1 );
1913
1914
put_packet ( s , buf );
}
1915
# endif
1916
1917
1918
/* Send a gdb syscall request .
This accepts limited printf - style format specifiers , specifically :
1919
1920
1921
% x - target_ulong argument printed in hex .
% lx - 64 - bit argument printed in hex .
% s - string pointer ( target_ulong ) and length ( int ) pair . */
1922
void gdb_do_syscall ( gdb_syscall_complete_cb cb , const char * fmt , ...)
1923
1924
1925
1926
1927
{
va_list va ;
char buf [ 256 ];
char * p ;
target_ulong addr ;
1928
uint64_t i64 ;
1929
1930
GDBState * s ;
1931
s = gdbserver_state ;
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
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 );
1949
p += snprintf ( p , & buf [ sizeof ( buf )] - p , TARGET_FMT_lx , addr );
1950
break ;
1951
1952
1953
1954
case 'l' :
if ( * ( fmt ++ ) != 'x' )
goto bad_format ;
i64 = va_arg ( va , uint64_t );
1955
p += snprintf ( p , & buf [ sizeof ( buf )] - p , "%" PRIx64 , i64 );
1956
break ;
1957
1958
case 's' :
addr = va_arg ( va , target_ulong );
1959
1960
p += snprintf ( p , & buf [ sizeof ( buf )] - p , TARGET_FMT_lx "/%x" ,
addr , va_arg ( va , int ));
1961
1962
break ;
default :
1963
bad_format :
1964
1965
1966
1967
1968
1969
1970
1971
fprintf ( stderr , "gdbstub: Bad syscall format string '%s' \n " ,
fmt - 1 );
break ;
}
} else {
* ( p ++ ) = * ( fmt ++ );
}
}
1972
* p = 0 ;
1973
1974
1975
va_end ( va );
put_packet ( s , buf );
# ifdef CONFIG_USER_ONLY
1976
gdb_handlesig ( s -> c_cpu , 0 );
1977
# else
1978
cpu_interrupt ( s -> c_cpu , CPU_INTERRUPT_EXIT );
1979
1980
1981
# endif
}
1982
static void gdb_read_byte ( GDBState * s , int ch )
1983
1984
{
int i , csum ;
ths
authored
17 years ago
1985
uint8_t reply ;
1986
1987
# ifndef CONFIG_USER_ONLY
1988
1989
1990
1991
1992
1993
1994
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
1995
put_buffer ( s , ( uint8_t * ) s -> last_packet , s -> last_packet_len );
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
}
# 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 ;
}
2008
2009
2010
2011
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
2012
} else
2013
# endif
2014
{
2015
2016
2017
2018
2019
switch ( s -> state ) {
case RS_IDLE :
if ( ch == '$' ) {
s -> line_buf_index = 0 ;
s -> state = RS_GETLINE ;
2020
}
2021
break ;
2022
2023
2024
2025
2026
case RS_GETLINE :
if ( ch == '#' ) {
s -> state = RS_CHKSUM1 ;
} else if ( s -> line_buf_index >= sizeof ( s -> line_buf ) - 1 ) {
s -> state = RS_IDLE ;
2027
} else {
2028
s -> line_buf [ s -> line_buf_index ++ ] = ch ;
2029
2030
}
break ;
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
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
2043
2044
reply = '-' ;
put_buffer ( s , & reply , 1 );
2045
s -> state = RS_IDLE ;
2046
} else {
ths
authored
17 years ago
2047
2048
reply = '+' ;
put_buffer ( s , & reply , 1 );
2049
s -> state = gdb_handle_packet ( s , s -> line_buf );
2050
2051
}
break ;
2052
2053
default :
abort ();
2054
2055
2056
2057
}
}
}
2058
2059
# ifdef CONFIG_USER_ONLY
int
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
gdb_queuesig ( void )
{
GDBState * s ;
s = gdbserver_state ;
if ( gdbserver_fd < 0 || s -> fd < 0 )
return 0 ;
else
return 1 ;
}
int
2073
2074
2075
2076
2077
2078
gdb_handlesig ( CPUState * env , int sig )
{
GDBState * s ;
char buf [ 256 ];
int n ;
2079
s = gdbserver_state ;
2080
2081
if ( gdbserver_fd < 0 || s -> fd < 0 )
return sig ;
2082
2083
2084
2085
2086
2087
2088
/* disable single step if it was enabled */
cpu_single_step ( env , 0 );
tb_flush ( env );
if ( sig != 0 )
{
2089
snprintf ( buf , sizeof ( buf ), "S%02x" , target_signal_to_gdb ( sig ));
2090
2091
put_packet ( s , buf );
}
2092
2093
2094
2095
/* put_packet () might have detected that the peer terminated the
connection . */
if ( s -> fd < 0 )
return sig ;
2096
2097
2098
sig = 0 ;
s -> state = RS_IDLE ;
2099
2100
s -> running_state = 0 ;
while ( s -> running_state == 0 ) {
2101
2102
2103
2104
2105
2106
n = read ( s -> fd , buf , 256 );
if ( n > 0 )
{
int i ;
for ( i = 0 ; i < n ; i ++ )
2107
gdb_read_byte ( s , buf [ i ]);
2108
2109
2110
2111
2112
2113
2114
}
else if ( n == 0 || errno != EAGAIN )
{
/* XXX : Connection closed . Should probably wait for annother
connection before continuing . */
return sig ;
}
2115
}
2116
2117
sig = s -> signal ;
s -> signal = 0 ;
2118
2119
return sig ;
}
2120
2121
2122
2123
2124
2125
2126
/* Tell the remote gdb that the process has exited. */
void gdb_exit ( CPUState * env , int code )
{
GDBState * s ;
char buf [ 4 ];
2127
s = gdbserver_state ;
2128
2129
if ( gdbserver_fd < 0 || s -> fd < 0 )
return ;
2130
2131
2132
2133
2134
snprintf ( buf , sizeof ( buf ), "W%02x" , code );
put_packet ( s , buf );
}
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
/* Tell the remote gdb that the process has exited due to SIG. */
void gdb_signalled ( CPUState * env , int sig )
{
GDBState * s ;
char buf [ 4 ];
s = gdbserver_state ;
if ( gdbserver_fd < 0 || s -> fd < 0 )
return ;
snprintf ( buf , sizeof ( buf ), "X%02x" , target_signal_to_gdb ( sig ));
put_packet ( s , buf );
}
2148
2149
static void gdb_accept ( void )
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
{
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 ) {
2163
2164
2165
break ;
}
}
2166
2167
2168
/* set short latency */
val = 1 ;
2169
setsockopt ( fd , IPPROTO_TCP , TCP_NODELAY , ( char * ) & val , sizeof ( val ));
ths
authored
18 years ago
2170
2171
2172
2173
2174
2175
2176
2177
s = qemu_mallocz ( sizeof ( GDBState ));
if ( ! s ) {
errno = ENOMEM ;
perror ( "accept" );
return ;
}
2178
memset ( s , 0 , sizeof ( GDBState ));
2179
2180
s -> c_cpu = first_cpu ;
s -> g_cpu = first_cpu ;
2181
s -> fd = fd ;
2182
gdb_has_xml = 0 ;
2183
2184
gdbserver_state = s ;
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
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 ;
2202
setsockopt ( fd , SOL_SOCKET , SO_REUSEADDR , ( char * ) & val , sizeof ( val ));
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
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 */
2226
gdb_accept ();
2227
2228
return 0 ;
}
2229
2230
2231
2232
2233
/* Disable gdb stub for child processes. */
void gdbserver_fork ( CPUState * env )
{
GDBState * s = gdbserver_state ;
2234
if ( gdbserver_fd < 0 || s -> fd < 0 )
2235
2236
2237
2238
2239
2240
return ;
close ( s -> fd );
s -> fd = - 1 ;
cpu_breakpoint_remove_all ( env , BP_GDB );
cpu_watchpoint_remove_all ( env , BP_GDB );
}
2241
# else
ths
authored
18 years ago
2242
static int gdb_chr_can_receive ( void * opaque )
2243
{
2244
2245
2246
/* We can handle an arbitrarily large amount of data .
Pick the maximum packet size , which is as good as anything . */
return MAX_PACKET_LENGTH ;
2247
2248
}
ths
authored
18 years ago
2249
static void gdb_chr_receive ( void * opaque , const uint8_t * buf , int size )
2250
2251
2252
2253
{
int i ;
for ( i = 0 ; i < size ; i ++ ) {
2254
gdb_read_byte ( gdbserver_state , buf [ i ]);
2255
2256
2257
2258
2259
2260
2261
2262
}
}
static void gdb_chr_event ( void * opaque , int event )
{
switch ( event ) {
case CHR_EVENT_RESET :
vm_stop ( EXCP_INTERRUPT );
2263
gdb_has_xml = 0 ;
2264
2265
2266
2267
2268
2269
break ;
default :
break ;
}
}
2270
int gdbserver_start ( const char * port )
2271
2272
{
GDBState * s ;
2273
2274
2275
2276
2277
2278
2279
char gdbstub_port_name [ 128 ];
int port_num ;
char * p ;
CharDriverState * chr ;
if ( ! port || !* port )
return - 1 ;
2280
2281
2282
2283
2284
2285
2286
2287
2288
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 ;
}
2289
chr = qemu_chr_open ( "gdb" , port );
2290
2291
2292
2293
2294
2295
2296
if ( ! chr )
return - 1 ;
s = qemu_mallocz ( sizeof ( GDBState ));
if ( ! s ) {
return - 1 ;
}
2297
2298
s -> c_cpu = first_cpu ;
s -> g_cpu = first_cpu ;
2299
s -> chr = chr ;
2300
gdbserver_state = s ;
ths
authored
18 years ago
2301
qemu_chr_add_handlers ( chr , gdb_chr_can_receive , gdb_chr_receive ,
2302
2303
gdb_chr_event , NULL );
qemu_add_vm_stop_handler ( gdb_vm_stopped , NULL );
2304
2305
return 0 ;
}
2306
# endif