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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 "monitor.h"
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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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# include "kvm.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 {
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RS_INACTIVE ,
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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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CharDriverState * mon_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 ;
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static enum {
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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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authored
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 )
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# define IDX_IP_REG CPU_NB_REGS
# define IDX_FLAGS_REG ( IDX_IP_REG + 1 )
# define IDX_SEG_REGS ( IDX_FLAGS_REG + 1 )
# define IDX_FP_REGS ( IDX_SEG_REGS + 6 )
# define IDX_XMM_REGS ( IDX_FP_REGS + 16 )
# define IDX_MXCSR_REG ( IDX_XMM_REGS + CPU_NB_REGS )
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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 < CPU_NB_REGS ) {
GET_REGL ( env -> regs [ gpr_map [ n ]]) ;
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} else if ( n >= IDX_FP_REGS && n < IDX_FP_REGS + 8 ) {
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# ifdef USE_X86LDOUBLE
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/* FIXME: byteswap float values - after fixing fpregs layout. */
memcpy ( mem_buf , & env -> fpregs [ n - IDX_FP_REGS ], 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 ;
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} else if ( n >= IDX_XMM_REGS && n < IDX_XMM_REGS + CPU_NB_REGS ) {
n -= IDX_XMM_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 ;
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} else {
switch ( n ) {
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case IDX_IP_REG : GET_REGL ( env -> eip ) ;
case IDX_FLAGS_REG : GET_REG32 ( env -> eflags ) ;
case IDX_SEG_REGS : GET_REG32 ( env -> segs [ R_CS ]. selector ) ;
case IDX_SEG_REGS + 1 : GET_REG32 ( env -> segs [ R_SS ]. selector ) ;
case IDX_SEG_REGS + 2 : GET_REG32 ( env -> segs [ R_DS ]. selector ) ;
case IDX_SEG_REGS + 3 : GET_REG32 ( env -> segs [ R_ES ]. selector ) ;
case IDX_SEG_REGS + 4 : GET_REG32 ( env -> segs [ R_FS ]. selector ) ;
case IDX_SEG_REGS + 5 : GET_REG32 ( env -> segs [ R_GS ]. selector ) ;
case IDX_FP_REGS + 8 : GET_REG32 ( env -> fpuc ) ;
case IDX_FP_REGS + 9 : GET_REG32 (( env -> fpus & ~ 0x3800 ) |
( env -> fpstt & 0x7 ) << 11 ) ;
case IDX_FP_REGS + 10 : GET_REG32 ( 0 ) ; /* ftag */
case IDX_FP_REGS + 11 : GET_REG32 ( 0 ) ; /* fiseg */
case IDX_FP_REGS + 12 : GET_REG32 ( 0 ) ; /* fioff */
case IDX_FP_REGS + 13 : GET_REG32 ( 0 ) ; /* foseg */
case IDX_FP_REGS + 14 : GET_REG32 ( 0 ) ; /* fooff */
case IDX_FP_REGS + 15 : GET_REG32 ( 0 ) ; /* fop */
case IDX_MXCSR_REG : GET_REG32 ( env -> mxcsr ) ;
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}
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}
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return 0 ;
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}
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static int cpu_x86_gdb_load_seg ( CPUState * env , int sreg , uint8_t * mem_buf )
{
uint16_t selector = ldl_p ( mem_buf ) ;
if ( selector != env -> segs [ sreg ]. selector ) {
# if defined ( CONFIG_USER_ONLY )
cpu_x86_load_seg ( env , sreg , selector ) ;
# else
unsigned int limit , flags ;
target_ulong base ;
if ( ! ( env -> cr [ 0 ] & CR0_PE_MASK ) || ( env -> eflags & VM_MASK )) {
base = selector << 4 ;
limit = 0xffff ;
flags = 0 ;
} else {
if ( ! cpu_x86_get_descr_debug ( env , selector , & base , & limit , & flags ))
return 4 ;
}
cpu_x86_load_seg_cache ( env , sreg , selector , base , limit , flags ) ;
# endif
}
return 4 ;
}
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static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
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{
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uint32_t tmp ;
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if ( n < CPU_NB_REGS ) {
env -> regs [ gpr_map [ n ]] = ldtul_p ( mem_buf ) ;
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return sizeof ( target_ulong ) ;
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} else if ( n >= IDX_FP_REGS && n < IDX_FP_REGS + 8 ) {
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# ifdef USE_X86LDOUBLE
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/* FIXME: byteswap float values - after fixing fpregs layout. */
memcpy ( & env -> fpregs [ n - IDX_FP_REGS ], mem_buf , 10 ) ;
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# endif
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return 10 ;
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} else if ( n >= IDX_XMM_REGS && n < IDX_XMM_REGS + CPU_NB_REGS ) {
n -= IDX_XMM_REGS ;
env -> xmm_regs [ n ]. XMM_Q ( 0 ) = ldq_p ( mem_buf ) ;
env -> xmm_regs [ n ]. XMM_Q ( 1 ) = ldq_p ( mem_buf + 8 ) ;
return 16 ;
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} else {
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switch ( n ) {
case IDX_IP_REG :
env -> eip = ldtul_p ( mem_buf ) ;
return sizeof ( target_ulong ) ;
case IDX_FLAGS_REG :
env -> eflags = ldl_p ( mem_buf ) ;
return 4 ;
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case IDX_SEG_REGS : return cpu_x86_gdb_load_seg ( env , R_CS , mem_buf ) ;
case IDX_SEG_REGS + 1 : return cpu_x86_gdb_load_seg ( env , R_SS , mem_buf ) ;
case IDX_SEG_REGS + 2 : return cpu_x86_gdb_load_seg ( env , R_DS , mem_buf ) ;
case IDX_SEG_REGS + 3 : return cpu_x86_gdb_load_seg ( env , R_ES , mem_buf ) ;
case IDX_SEG_REGS + 4 : return cpu_x86_gdb_load_seg ( env , R_FS , mem_buf ) ;
case IDX_SEG_REGS + 5 : return cpu_x86_gdb_load_seg ( env , R_GS , mem_buf ) ;
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case IDX_FP_REGS + 8 :
env -> fpuc = ldl_p ( mem_buf ) ;
return 4 ;
case IDX_FP_REGS + 9 :
tmp = ldl_p ( mem_buf ) ;
env -> fpstt = ( tmp >> 11 ) & 7 ;
env -> fpus = tmp & ~ 0x3800 ;
return 4 ;
case IDX_FP_REGS + 10 : /* ftag */ return 4 ;
case IDX_FP_REGS + 11 : /* fiseg */ return 4 ;
case IDX_FP_REGS + 12 : /* fioff */ return 4 ;
case IDX_FP_REGS + 13 : /* foseg */ return 4 ;
case IDX_FP_REGS + 14 : /* fooff */ return 4 ;
case IDX_FP_REGS + 15 : /* fop */ return 4 ;
case IDX_MXCSR_REG :
env -> mxcsr = ldl_p ( mem_buf ) ;
return 4 ;
643
644
}
}
645
646
/* Unrecognised register. */
return 0 ;
647
648
}
649
650
# elif defined ( TARGET_PPC )
651
652
653
654
655
/* Old gdb always expects FP registers . Newer ( xml - aware ) gdb only
expects whatever the target description contains . Due to a
historical mishap the FP registers appear in between core integer
regs and PC , MSR , CR , and so forth . We hack round this by giving the
FP regs zero size when talking to a newer gdb . */
656
# define NUM_CORE_REGS 71
657
658
659
660
661
# if defined ( TARGET_PPC64 )
# define GDB_CORE_XML "power64-core.xml"
# else
# define GDB_CORE_XML "power-core.xml"
# endif
662
663
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
664
{
665
666
667
668
669
if ( n < 32 ) {
/* gprs */
GET_REGL ( env -> gpr [ n ]) ;
} else if ( n < 64 ) {
/* fprs */
670
671
if ( gdb_has_xml )
return 0 ;
672
stfq_p ( mem_buf , env -> fpr [ n - 32 ]) ;
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
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 ) ;
688
case 69 : GET_REGL ( env -> xer ) ;
689
690
691
692
693
694
case 70 :
{
if ( gdb_has_xml )
return 0 ;
GET_REG32 ( 0 ) ; /* fpscr */
}
695
696
697
698
}
}
return 0 ;
}
699
700
701
702
703
704
705
706
707
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 */
708
709
if ( gdb_has_xml )
return 0 ;
710
env -> fpr [ n - 32 ] = ldfq_p ( mem_buf ) ;
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
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 :
735
736
env -> xer = ldtul_p ( mem_buf ) ;
return sizeof ( target_ulong ) ;
737
738
case 70 :
/* fpscr */
739
740
if ( gdb_has_xml )
return 0 ;
741
742
743
744
return 4 ;
}
}
return 0 ;
745
}
746
747
# elif defined ( TARGET_SPARC )
748
749
750
# if defined ( TARGET_SPARC64 ) && ! defined ( TARGET_ABI32 )
# define NUM_CORE_REGS 86
751
# else
752
# define NUM_CORE_REGS 72
753
# endif
754
755
# ifdef TARGET_ABI32
756
# define GET_REGA ( val ) GET_REG32 ( val )
757
# else
758
# define GET_REGA ( val ) GET_REGL ( val )
759
# endif
760
761
762
763
764
765
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
{
if ( n < 8 ) {
/* g0..g7 */
GET_REGA ( env -> gregs [ n ]) ;
766
}
767
768
769
if ( n < 32 ) {
/* register window */
GET_REGA ( env -> regwptr [ n - 8 ]) ;
770
}
771
772
773
774
# if defined ( TARGET_ABI32 ) || ! defined ( TARGET_SPARC64 )
if ( n < 64 ) {
/* fprs */
GET_REG32 ( * (( uint32_t * ) & env -> fpr [ n - 32 ])) ;
775
776
}
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
777
778
779
780
781
782
783
784
785
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 */
786
default : GET_REGA ( 0 );
787
}
788
# else
789
790
791
792
793
794
795
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 ;
796
797
798
799
val = ( uint64_t ) * (( uint32_t * ) & env -> fpr [( n - 64 ) * 2 + 32 ]) << 32 ;
val |= * (( uint32_t * ) & env -> fpr [( n - 64 ) * 2 + 33 ]);
GET_REG64 ( val );
800
}
801
802
803
804
switch ( n ) {
case 80 : GET_REGL ( env -> pc );
case 81 : GET_REGL ( env -> npc );
case 82 : GET_REGL ((( uint64_t ) GET_CCR ( env ) << 32 ) |
805
806
807
(( env -> asi & 0xff ) << 24 ) |
(( env -> pstate & 0xfff ) << 8 ) |
GET_CWP64 ( env ));
808
809
810
811
case 83 : GET_REGL ( env -> fsr );
case 84 : GET_REGL ( env -> fprs );
case 85 : GET_REGL ( env -> y );
}
812
# endif
813
return 0 ;
814
815
}
816
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
817
{
818
819
820
821
# if defined ( TARGET_ABI32 )
abi_ulong tmp ;
tmp = ldl_p ( mem_buf );
822
# else
823
824
825
target_ulong tmp ;
tmp = ldtul_p ( mem_buf );
826
# endif
827
828
829
830
831
832
833
if ( n < 8 ) {
/* g0..g7 */
env -> gregs [ n ] = tmp ;
} else if ( n < 32 ) {
/* register window */
env -> regwptr [ n - 8 ] = tmp ;
834
}
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
# 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 ;
}
851
}
852
return 4 ;
853
# else
854
855
856
857
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859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
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 ;
}
877
}
878
return 8 ;
879
# endif
880
}
881
# elif defined ( TARGET_ARM )
882
883
884
885
886
887
888
889
/* 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"
890
891
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
892
{
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
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 ;
916
}
917
918
919
920
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
{
uint32_t tmp ;
921
922
tmp = ldl_p ( mem_buf );
923
924
925
926
927
/* 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 ;
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
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 ;
}
954
955
# elif defined ( TARGET_M68K )
956
957
# define NUM_CORE_REGS 18
958
959
# define GDB_CORE_XML "cf-core.xml"
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
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
979
980
981
982
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
{
uint32_t tmp ;
ths
authored
18 years ago
983
984
tmp = ldl_p ( mem_buf );
ths
authored
18 years ago
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
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
1002
1003
# define NUM_CORE_REGS 73
ths
authored
17 years ago
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
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 );
}
1036
1037
return 0 ;
1038
1039
}
ths
authored
18 years ago
1040
1041
1042
1043
1044
1045
1046
1047
1048
/* 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
1049
set_float_rounding_mode ( ieee_rm [ env -> active_fpu . fcr31 & 3 ], & env -> active_fpu . fp_status )
ths
authored
18 years ago
1050
1051
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
1052
{
1053
target_ulong tmp ;
1054
1055
tmp = ldtul_p ( mem_buf );
1056
1057
1058
1059
1060
1061
1062
1063
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
1064
if ( env -> CP0_Status & ( 1 << CP0St_FR ))
1065
env -> active_fpu . fpr [ n - 38 ]. d = tmp ;
ths
authored
17 years ago
1066
else
1067
1068
1069
1070
1071
1072
1073
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
1074
# ifndef CONFIG_SOFTFLOAT
1075
1076
/* no floating point exception for native float */
SET_FP_ENABLE ( env -> active_fpu . fcr31 , 0 );
ths
authored
18 years ago
1077
# endif
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
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 );
1099
}
1100
# elif defined ( TARGET_SH4 )
ths
authored
18 years ago
1101
1102
/* Hint: Use "set architecture sh4" in GDB to see fpu registers */
1103
1104
1105
/* FIXME: We should use XML for this. */
# define NUM_CORE_REGS 59
ths
authored
18 years ago
1106
1107
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
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
1133
1134
1135
1136
1137
1138
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 ;
1139
1140
}
1141
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
1142
{
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
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 ;
1182
}
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
# elif defined ( TARGET_MICROBLAZE )
# define NUM_CORE_REGS ( 32 + 5 )
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
{
if ( n < 32 ) {
GET_REG32 ( env -> regs [ n ]);
} else {
GET_REG32 ( env -> sregs [ n - 32 ]);
}
return 0 ;
}
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
{
uint32_t tmp ;
if ( n > NUM_CORE_REGS )
return 0 ;
tmp = ldl_p ( mem_buf );
if ( n < 32 ) {
env -> regs [ n ] = tmp ;
} else {
env -> sregs [ n - 32 ] = tmp ;
}
return 4 ;
}
ths
authored
17 years ago
1213
1214
# elif defined ( TARGET_CRIS )
1215
1216
1217
# define NUM_CORE_REGS 49
static int cpu_gdb_read_register ( CPUState * env , uint8_t * mem_buf , int n )
ths
authored
17 years ago
1218
{
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
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
1242
}
1243
1244
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
ths
authored
17 years ago
1245
{
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
uint32_t tmp ;
if ( n > 49 )
return 0 ;
tmp = ldl_p ( mem_buf );
if ( n < 16 ) {
env -> regs [ n ] = tmp ;
}
1257
1258
1259
1260
1261
if ( n >= 21 && n < 32 ) {
env -> pregs [ n - 16 ] = tmp ;
}
/* FIXME: Should support function regs be writable? */
1262
1263
1264
switch ( n ) {
case 16 : return 1 ;
case 17 : return 1 ;
1265
case 18 : env -> pregs [ PR_PID ] = tmp ; break ;
1266
1267
1268
1269
1270
1271
case 19 : return 1 ;
case 20 : return 2 ;
case 32 : env -> pc = tmp ; break ;
}
return 4 ;
ths
authored
17 years ago
1272
}
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
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1291
1292
1293
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1298
1299
1300
1301
1302
1303
1304
1305
1306
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1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
# 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 ;
}
1323
1324
1325
1326
1327
# 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
1328
{
1329
return 0 ;
ths
authored
17 years ago
1330
1331
}
1332
static int cpu_gdb_write_register ( CPUState * env , uint8_t * mem_buf , int n )
ths
authored
17 years ago
1333
{
1334
1335
return 0 ;
}
ths
authored
17 years ago
1336
1337
# endif
ths
authored
17 years ago
1338
1339
static int num_g_regs = NUM_CORE_REGS ;
ths
authored
17 years ago
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
# 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
1362
1363
static const char * get_feature_xml ( const char * p , const char ** newp )
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
{
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 ;
1382
1383
1384
1385
1386
1387
snprintf ( target_xml , sizeof ( target_xml ),
"<?xml version= \" 1.0 \" ?>"
"<!DOCTYPE target SYSTEM \" gdb-target.dtd \" >"
"<target>"
"<xi:include href= \" %s \" />" ,
GDB_CORE_XML );
1388
1389
for ( r = first_cpu -> gdb_regs ; r ; r = r -> next ) {
1390
1391
1392
pstrcat ( target_xml , sizeof ( target_xml ), "<xi:include href= \" " );
pstrcat ( target_xml , sizeof ( target_xml ), r -> xml );
pstrcat ( target_xml , sizeof ( target_xml ), " \" />" );
1393
}
1394
pstrcat ( target_xml , sizeof ( target_xml ), "</target>" );
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
}
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
1406
1407
1408
1409
static int gdb_read_register ( CPUState * env , uint8_t * mem_buf , int reg )
{
GDBRegisterState * r ;
ths
authored
17 years ago
1410
1411
1412
if ( reg < NUM_CORE_REGS )
return cpu_gdb_read_register ( env , mem_buf , reg );
ths
authored
17 years ago
1413
1414
1415
1416
1417
1418
1419
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
1420
1421
}
1422
static int gdb_write_register ( CPUState * env , uint8_t * mem_buf , int reg )
ths
authored
17 years ago
1423
{
1424
GDBRegisterState * r ;
ths
authored
17 years ago
1425
1426
1427
1428
1429
1430
1431
1432
1433
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 );
}
}
1434
1435
1436
return 0 ;
}
1437
1438
1439
1440
1441
1442
1443
1444
1445
/* 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 )
1446
{
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
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 ;
}
}
1475
1476
}
1477
1478
1479
1480
1481
1482
1483
1484
# 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
1485
static int gdb_breakpoint_insert ( target_ulong addr , target_ulong len , int type )
1486
{
1487
1488
1489
CPUState * env ;
int err = 0 ;
1490
1491
1492
if ( kvm_enabled ())
return kvm_insert_breakpoint ( gdbserver_state -> c_cpu , addr , len , type );
1493
1494
1495
switch ( type ) {
case GDB_BREAKPOINT_SW :
case GDB_BREAKPOINT_HW :
1496
1497
1498
1499
1500
1501
for ( env = first_cpu ; env != NULL ; env = env -> next_cpu ) {
err = cpu_breakpoint_insert ( env , addr , BP_GDB , NULL );
if ( err )
break ;
}
return err ;
1502
1503
1504
1505
# ifndef CONFIG_USER_ONLY
case GDB_WATCHPOINT_WRITE :
case GDB_WATCHPOINT_READ :
case GDB_WATCHPOINT_ACCESS :
1506
1507
1508
1509
1510
1511
1512
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 ;
1513
1514
1515
1516
1517
1518
# endif
default :
return - ENOSYS ;
}
}
1519
static int gdb_breakpoint_remove ( target_ulong addr , target_ulong len , int type )
1520
{
1521
1522
1523
CPUState * env ;
int err = 0 ;
1524
1525
1526
if ( kvm_enabled ())
return kvm_remove_breakpoint ( gdbserver_state -> c_cpu , addr , len , type );
1527
1528
1529
switch ( type ) {
case GDB_BREAKPOINT_SW :
case GDB_BREAKPOINT_HW :
1530
1531
1532
1533
1534
1535
for ( env = first_cpu ; env != NULL ; env = env -> next_cpu ) {
err = cpu_breakpoint_remove ( env , addr , BP_GDB );
if ( err )
break ;
}
return err ;
1536
1537
1538
1539
# ifndef CONFIG_USER_ONLY
case GDB_WATCHPOINT_WRITE :
case GDB_WATCHPOINT_READ :
case GDB_WATCHPOINT_ACCESS :
1540
1541
1542
1543
1544
1545
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 ;
1546
1547
1548
1549
1550
1551
# endif
default :
return - ENOSYS ;
}
}
1552
static void gdb_breakpoint_remove_all ( void )
1553
{
1554
1555
CPUState * env ;
1556
1557
1558
1559
1560
if ( kvm_enabled ()) {
kvm_remove_all_breakpoints ( gdbserver_state -> c_cpu );
return ;
}
1561
1562
for ( env = first_cpu ; env != NULL ; env = env -> next_cpu ) {
cpu_breakpoint_remove_all ( env , BP_GDB );
1563
# ifndef CONFIG_USER_ONLY
1564
cpu_watchpoint_remove_all ( env , BP_GDB );
1565
# endif
1566
}
1567
1568
}
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
static void gdb_set_cpu_pc ( GDBState * s , target_ulong pc )
{
# if defined ( TARGET_I386 )
s -> c_cpu -> eip = pc ;
cpu_synchronize_state ( s -> c_cpu , 1 );
# elif defined ( TARGET_PPC )
s -> c_cpu -> nip = pc ;
# elif defined ( TARGET_SPARC )
s -> c_cpu -> pc = pc ;
s -> c_cpu -> npc = pc + 4 ;
# elif defined ( TARGET_ARM )
s -> c_cpu -> regs [ 15 ] = pc ;
# elif defined ( TARGET_SH4 )
s -> c_cpu -> pc = pc ;
# elif defined ( TARGET_MIPS )
s -> c_cpu -> active_tc . PC = pc ;
1585
1586
# elif defined ( TARGET_MICROBLAZE )
s -> c_cpu -> sregs [ SR_PC ] = pc ;
1587
1588
1589
1590
1591
1592
1593
# elif defined ( TARGET_CRIS )
s -> c_cpu -> pc = pc ;
# elif defined ( TARGET_ALPHA )
s -> c_cpu -> pc = pc ;
# endif
}
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
static inline int gdb_id ( CPUState * env )
{
# if defined ( CONFIG_USER_ONLY ) && defined ( USE_NPTL )
return env -> host_tid ;
# else
return env -> cpu_index + 1 ;
# endif
}
static CPUState * find_cpu ( uint32_t thread_id )
{
CPUState * env ;
for ( env = first_cpu ; env != NULL ; env = env -> next_cpu ) {
if ( gdb_id ( env ) == thread_id ) {
return env ;
}
}
return NULL ;
}
1616
static int gdb_handle_packet ( GDBState * s , const char * line_buf )
1617
{
1618
CPUState * env ;
1619
const char * p ;
1620
1621
uint32_t thread ;
int ch , reg_size , type , res ;
1622
1623
1624
char buf [ MAX_PACKET_LENGTH ];
uint8_t mem_buf [ MAX_PACKET_LENGTH ];
uint8_t * registers ;
1625
target_ulong addr , len ;
ths
authored
18 years ago
1626
1627
1628
1629
1630
1631
1632
1633
# ifdef DEBUG_GDB
printf ( "command='%s' \n " , line_buf );
# endif
p = line_buf ;
ch = * p ++ ;
switch ( ch ) {
case '?' :
1634
/* TODO: Make this return the correct value for user-mode. */
1635
snprintf ( buf , sizeof ( buf ), "T%02xthread:%02x;" , GDB_SIGNAL_TRAP ,
1636
gdb_id ( s -> c_cpu ));
1637
put_packet ( s , buf );
1638
1639
1640
1641
/* Remove all the breakpoints when this query is issued ,
* because gdb is doing and initial connect and the state
* should be cleaned up .
*/
1642
gdb_breakpoint_remove_all ();
1643
1644
1645
break ;
case 'c' :
if ( * p != '\0' ) {
1646
addr = strtoull ( p , ( char ** ) & p , 16 );
1647
gdb_set_cpu_pc ( s , addr );
1648
}
1649
s -> signal = 0 ;
1650
gdb_continue ( s );
1651
return RS_IDLE ;
1652
case 'C' :
1653
1654
1655
s -> signal = gdb_signal_to_target ( strtoul ( p , ( char ** ) & p , 16 ));
if ( s -> signal == - 1 )
s -> signal = 0 ;
1656
1657
gdb_continue ( s );
return RS_IDLE ;
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
case 'v' :
if ( strncmp ( p , "Cont" , 4 ) == 0 ) {
int res_signal , res_thread ;
p += 4 ;
if ( * p == '?' ) {
put_packet ( s , "vCont;c;C;s;S" );
break ;
}
res = 0 ;
res_signal = 0 ;
res_thread = 0 ;
while ( * p ) {
int action , signal ;
if ( * p ++ != ';' ) {
res = 0 ;
break ;
}
action = * p ++ ;
signal = 0 ;
if ( action == 'C' || action == 'S' ) {
signal = strtoul ( p , ( char ** ) & p , 16 );
} else if ( action != 'c' && action != 's' ) {
res = 0 ;
break ;
}
thread = 0 ;
if ( * p == ':' ) {
thread = strtoull ( p + 1 , ( char ** ) & p , 16 );
}
action = tolower ( action );
if ( res == 0 || ( res == 'c' && action == 's' )) {
res = action ;
res_signal = signal ;
res_thread = thread ;
}
}
if ( res ) {
if ( res_thread != - 1 && res_thread != 0 ) {
env = find_cpu ( res_thread );
if ( env == NULL ) {
put_packet ( s , "E22" );
break ;
}
s -> c_cpu = env ;
}
if ( res == 's' ) {
cpu_single_step ( s -> c_cpu , sstep_flags );
}
s -> signal = res_signal ;
gdb_continue ( s );
return RS_IDLE ;
}
break ;
} else {
goto unknown_command ;
}
1716
1717
1718
1719
1720
1721
case 'k' :
/* Kill the target */
fprintf ( stderr , " \n QEMU: Terminated via GDBstub \n " );
exit ( 0 );
case 'D' :
/* Detach packet */
1722
gdb_breakpoint_remove_all ();
1723
1724
1725
gdb_continue ( s );
put_packet ( s , "OK" );
break ;
1726
1727
case 's' :
if ( * p != '\0' ) {
ths
authored
18 years ago
1728
addr = strtoull ( p , ( char ** ) & p , 16 );
1729
gdb_set_cpu_pc ( s , addr );
1730
}
1731
cpu_single_step ( s -> c_cpu , sstep_flags );
1732
gdb_continue ( s );
1733
return RS_IDLE ;
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
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 )
1750
gdb_current_syscall_cb ( s -> c_cpu , ret , err );
1751
1752
1753
if ( type == 'C' ) {
put_packet ( s , "T02" );
} else {
1754
gdb_continue ( s );
1755
1756
1757
}
}
break ;
1758
case 'g' :
1759
cpu_synchronize_state ( s -> g_cpu , 0 );
1760
1761
len = 0 ;
for ( addr = 0 ; addr < num_g_regs ; addr ++ ) {
1762
reg_size = gdb_read_register ( s -> g_cpu , mem_buf + len , addr );
1763
1764
1765
len += reg_size ;
}
memtohex ( buf , mem_buf , len );
1766
1767
1768
put_packet ( s , buf );
break ;
case 'G' :
1769
registers = mem_buf ;
1770
1771
len = strlen ( p ) / 2 ;
hextomem (( uint8_t * ) registers , p , len );
1772
for ( addr = 0 ; addr < num_g_regs && len > 0 ; addr ++ ) {
1773
reg_size = gdb_write_register ( s -> g_cpu , registers , addr );
1774
1775
1776
len -= reg_size ;
registers += reg_size ;
}
1777
cpu_synchronize_state ( s -> g_cpu , 1 );
1778
1779
1780
put_packet ( s , "OK" );
break ;
case 'm' :
1781
addr = strtoull ( p , ( char ** ) & p , 16 );
1782
1783
if ( * p == ',' )
p ++ ;
1784
len = strtoull ( p , NULL , 16 );
1785
if ( cpu_memory_rw_debug ( s -> g_cpu , addr , mem_buf , len , 0 ) != 0 ) {
1786
1787
1788
1789
1790
put_packet ( s , "E14" );
} else {
memtohex ( buf , mem_buf , len );
put_packet ( s , buf );
}
1791
1792
break ;
case 'M' :
1793
addr = strtoull ( p , ( char ** ) & p , 16 );
1794
1795
if ( * p == ',' )
p ++ ;
1796
len = strtoull ( p , ( char ** ) & p , 16 );
1797
if ( * p == ':' )
1798
1799
p ++ ;
hextomem ( mem_buf , p , len );
1800
if ( cpu_memory_rw_debug ( s -> g_cpu , addr , mem_buf , len , 1 ) != 0 )
1801
put_packet ( s , "E14" );
1802
1803
1804
else
put_packet ( s , "OK" );
break ;
1805
1806
1807
1808
1809
1810
1811
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 );
1812
reg_size = gdb_read_register ( s -> g_cpu , mem_buf , addr );
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
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 );
1828
gdb_write_register ( s -> g_cpu , mem_buf , addr );
1829
1830
put_packet ( s , "OK" );
break ;
1831
1832
1833
1834
1835
case 'Z' :
case 'z' :
type = strtoul ( p , ( char ** ) & p , 16 );
if ( * p == ',' )
p ++ ;
1836
addr = strtoull ( p , ( char ** ) & p , 16 );
1837
1838
if ( * p == ',' )
p ++ ;
1839
len = strtoull ( p , ( char ** ) & p , 16 );
1840
if ( ch == 'Z' )
1841
res = gdb_breakpoint_insert ( addr , len , type );
1842
else
1843
res = gdb_breakpoint_remove ( addr , len , type );
1844
1845
1846
if ( res >= 0 )
put_packet ( s , "OK" );
else if ( res == - ENOSYS )
1847
put_packet ( s , "" );
1848
1849
else
put_packet ( s , "E22" );
1850
break ;
1851
1852
1853
1854
1855
1856
1857
case 'H' :
type = * p ++ ;
thread = strtoull ( p , ( char ** ) & p , 16 );
if ( thread == - 1 || thread == 0 ) {
put_packet ( s , "OK" );
break ;
}
1858
env = find_cpu ( thread );
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
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 );
1879
1880
1881
1882
1883
env = find_cpu ( thread );
if ( env != NULL ) {
put_packet ( s , "OK" );
} else {
1884
put_packet ( s , "E22" );
1885
}
1886
break ;
1887
case 'q' :
1888
1889
1890
1891
case 'Q' :
/* parse any 'q' packets here */
if ( ! strcmp ( p , "qemu.sstepbits" )) {
/* Query Breakpoint bit definitions */
1892
1893
1894
1895
snprintf ( buf , sizeof ( buf ), "ENABLE=%x,NOIRQ=%x,NOTIMER=%x" ,
SSTEP_ENABLE ,
SSTEP_NOIRQ ,
SSTEP_NOTIMER );
1896
1897
1898
1899
1900
1901
1902
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 */
1903
snprintf ( buf , sizeof ( buf ), "0x%x" , sstep_flags );
1904
1905
1906
1907
1908
1909
1910
1911
put_packet ( s , buf );
break ;
}
p ++ ;
type = strtoul ( p , ( char ** ) & p , 16 );
sstep_flags = type ;
put_packet ( s , "OK" );
break ;
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
} 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 ) {
1923
snprintf ( buf , sizeof ( buf ), "m%x" , gdb_id ( s -> query_cpu ));
1924
1925
1926
1927
1928
1929
1930
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 );
1931
1932
1933
1934
1935
1936
1937
1938
1939
env = find_cpu ( thread );
if ( env != NULL ) {
cpu_synchronize_state ( env , 0 );
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 );
}
1940
break ;
1941
}
1942
# ifdef CONFIG_USER_ONLY
1943
else if ( strncmp ( p , "Offsets" , 7 ) == 0 ) {
1944
TaskState * ts = s -> c_cpu -> opaque ;
1945
1946
1947
1948
1949
1950
1951
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 );
1952
1953
1954
put_packet ( s , buf );
break ;
}
1955
# else /* !CONFIG_USER_ONLY */
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
else if ( strncmp ( p , "Rcmd," , 5 ) == 0 ) {
int len = strlen ( p + 5 );
if (( len % 2 ) != 0 ) {
put_packet ( s , "E01" );
break ;
}
hextomem ( mem_buf , p + 5 , len );
len = len / 2 ;
mem_buf [ len ++ ] = 0 ;
qemu_chr_read ( s -> mon_chr , mem_buf , len );
put_packet ( s , "OK" );
break ;
}
1970
# endif /* !CONFIG_USER_ONLY */
1971
if ( strncmp ( p , "Supported" , 9 ) == 0 ) {
1972
snprintf ( buf , sizeof ( buf ), "PacketSize=%x" , MAX_PACKET_LENGTH );
1973
# ifdef GDB_CORE_XML
1974
pstrcat ( buf , sizeof ( buf ), ";qXfer:features:read+" );
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
# 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 ;
1986
xml = get_feature_xml ( p , & p );
1987
if ( ! xml ) {
1988
snprintf ( buf , sizeof ( buf ), "E00" );
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
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 ) {
2002
snprintf ( buf , sizeof ( buf ), "E00" );
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
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 ;
2022
default :
2023
unknown_command :
2024
2025
2026
2027
2028
2029
2030
2031
/* put empty packet */
buf [ 0 ] = '\0' ;
put_packet ( s , buf );
break ;
}
return RS_IDLE ;
}
2032
2033
2034
2035
2036
2037
void gdb_set_stop_cpu ( CPUState * env )
{
gdbserver_state -> c_cpu = env ;
gdbserver_state -> g_cpu = env ;
}
2038
# ifndef CONFIG_USER_ONLY
2039
static void gdb_vm_state_change ( void * opaque , int running , int reason )
2040
{
2041
2042
GDBState * s = gdbserver_state ;
CPUState * env = s -> c_cpu ;
2043
char buf [ 256 ];
2044
const char * type ;
2045
2046
int ret ;
2047
if ( running || ( reason != EXCP_DEBUG && reason != EXCP_INTERRUPT ) ||
2048
s -> state == RS_INACTIVE || s -> state == RS_SYSCALL )
2049
2050
return ;
2051
/* disable single step if it was enable */
2052
cpu_single_step ( env , 0 );
2053
2054
if ( reason == EXCP_DEBUG ) {
2055
2056
if ( env -> watchpoint_hit ) {
switch ( env -> watchpoint_hit -> flags & BP_MEM_ACCESS ) {
2057
case BP_MEM_READ :
2058
2059
type = "r" ;
break ;
2060
case BP_MEM_ACCESS :
2061
2062
2063
2064
2065
2066
type = "a" ;
break ;
default :
type = "" ;
break ;
}
2067
2068
snprintf ( buf , sizeof ( buf ),
"T%02xthread:%02x;%swatch:" TARGET_FMT_lx ";" ,
2069
GDB_SIGNAL_TRAP , gdb_id ( env ), type ,
2070
env -> watchpoint_hit -> vaddr );
2071
put_packet ( s , buf );
2072
env -> watchpoint_hit = NULL ;
2073
2074
return ;
}
2075
tb_flush ( env );
2076
ret = GDB_SIGNAL_TRAP ;
2077
} else {
2078
ret = GDB_SIGNAL_INT ;
2079
}
2080
snprintf ( buf , sizeof ( buf ), "T%02xthread:%02x;" , ret , gdb_id ( env ));
2081
2082
put_packet ( s , buf );
}
2083
# endif
2084
2085
2086
/* Send a gdb syscall request .
This accepts limited printf - style format specifiers , specifically :
2087
2088
2089
% x - target_ulong argument printed in hex .
% lx - 64 - bit argument printed in hex .
% s - string pointer ( target_ulong ) and length ( int ) pair . */
2090
void gdb_do_syscall ( gdb_syscall_complete_cb cb , const char * fmt , ...)
2091
2092
2093
2094
2095
{
va_list va ;
char buf [ 256 ];
char * p ;
target_ulong addr ;
2096
uint64_t i64 ;
2097
2098
GDBState * s ;
2099
s = gdbserver_state ;
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
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 );
2117
p += snprintf ( p , & buf [ sizeof ( buf )] - p , TARGET_FMT_lx , addr );
2118
break ;
2119
2120
2121
2122
case 'l' :
if ( * ( fmt ++ ) != 'x' )
goto bad_format ;
i64 = va_arg ( va , uint64_t );
2123
p += snprintf ( p , & buf [ sizeof ( buf )] - p , "%" PRIx64 , i64 );
2124
break ;
2125
2126
case 's' :
addr = va_arg ( va , target_ulong );
2127
2128
p += snprintf ( p , & buf [ sizeof ( buf )] - p , TARGET_FMT_lx "/%x" ,
addr , va_arg ( va , int ));
2129
2130
break ;
default :
2131
bad_format :
2132
2133
2134
2135
2136
2137
2138
2139
fprintf ( stderr , "gdbstub: Bad syscall format string '%s' \n " ,
fmt - 1 );
break ;
}
} else {
* ( p ++ ) = * ( fmt ++ );
}
}
2140
* p = 0 ;
2141
2142
2143
va_end ( va );
put_packet ( s , buf );
# ifdef CONFIG_USER_ONLY
2144
gdb_handlesig ( s -> c_cpu , 0 );
2145
# else
2146
cpu_exit ( s -> c_cpu );
2147
2148
2149
# endif
}
2150
static void gdb_read_byte ( GDBState * s , int ch )
2151
2152
{
int i , csum ;
ths
authored
17 years ago
2153
uint8_t reply ;
2154
2155
# ifndef CONFIG_USER_ONLY
2156
2157
2158
2159
2160
2161
2162
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
2163
put_buffer ( s , ( uint8_t * ) s -> last_packet , s -> last_packet_len );
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
}
# 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 ;
}
2176
2177
2178
2179
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
2180
} else
2181
# endif
2182
{
2183
2184
2185
2186
2187
switch ( s -> state ) {
case RS_IDLE :
if ( ch == '$' ) {
s -> line_buf_index = 0 ;
s -> state = RS_GETLINE ;
2188
}
2189
break ;
2190
2191
2192
2193
2194
case RS_GETLINE :
if ( ch == '#' ) {
s -> state = RS_CHKSUM1 ;
} else if ( s -> line_buf_index >= sizeof ( s -> line_buf ) - 1 ) {
s -> state = RS_IDLE ;
2195
} else {
2196
s -> line_buf [ s -> line_buf_index ++ ] = ch ;
2197
2198
}
break ;
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
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
2211
2212
reply = '-' ;
put_buffer ( s , & reply , 1 );
2213
s -> state = RS_IDLE ;
2214
} else {
ths
authored
17 years ago
2215
2216
reply = '+' ;
put_buffer ( s , & reply , 1 );
2217
s -> state = gdb_handle_packet ( s , s -> line_buf );
2218
2219
}
break ;
2220
2221
default :
abort ();
2222
2223
2224
2225
}
}
}
2226
2227
# ifdef CONFIG_USER_ONLY
int
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
gdb_queuesig ( void )
{
GDBState * s ;
s = gdbserver_state ;
if ( gdbserver_fd < 0 || s -> fd < 0 )
return 0 ;
else
return 1 ;
}
int
2241
2242
2243
2244
2245
2246
gdb_handlesig ( CPUState * env , int sig )
{
GDBState * s ;
char buf [ 256 ];
int n ;
2247
s = gdbserver_state ;
2248
2249
if ( gdbserver_fd < 0 || s -> fd < 0 )
return sig ;
2250
2251
2252
2253
2254
2255
2256
/* disable single step if it was enabled */
cpu_single_step ( env , 0 );
tb_flush ( env );
if ( sig != 0 )
{
2257
snprintf ( buf , sizeof ( buf ), "S%02x" , target_signal_to_gdb ( sig ));
2258
2259
put_packet ( s , buf );
}
2260
2261
2262
2263
/* put_packet () might have detected that the peer terminated the
connection . */
if ( s -> fd < 0 )
return sig ;
2264
2265
2266
sig = 0 ;
s -> state = RS_IDLE ;
2267
2268
s -> running_state = 0 ;
while ( s -> running_state == 0 ) {
2269
2270
2271
2272
2273
2274
n = read ( s -> fd , buf , 256 );
if ( n > 0 )
{
int i ;
for ( i = 0 ; i < n ; i ++ )
2275
gdb_read_byte ( s , buf [ i ]);
2276
2277
2278
2279
2280
2281
2282
}
else if ( n == 0 || errno != EAGAIN )
{
/* XXX : Connection closed . Should probably wait for annother
connection before continuing . */
return sig ;
}
2283
}
2284
2285
sig = s -> signal ;
s -> signal = 0 ;
2286
2287
return sig ;
}
2288
2289
2290
2291
2292
2293
2294
/* Tell the remote gdb that the process has exited. */
void gdb_exit ( CPUState * env , int code )
{
GDBState * s ;
char buf [ 4 ];
2295
s = gdbserver_state ;
2296
2297
if ( gdbserver_fd < 0 || s -> fd < 0 )
return ;
2298
2299
2300
2301
2302
snprintf ( buf , sizeof ( buf ), "W%02x" , code );
put_packet ( s , buf );
}
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
/* 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 );
}
2316
2317
static void gdb_accept ( void )
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
{
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 ) {
2331
2332
2333
break ;
}
}
2334
2335
2336
/* set short latency */
val = 1 ;
2337
setsockopt ( fd , IPPROTO_TCP , TCP_NODELAY , ( char * ) & val , sizeof ( val ));
ths
authored
18 years ago
2338
2339
2340
2341
s = qemu_mallocz ( sizeof ( GDBState ));
s -> c_cpu = first_cpu ;
s -> g_cpu = first_cpu ;
2342
s -> fd = fd ;
2343
gdb_has_xml = 0 ;
2344
2345
gdbserver_state = s ;
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
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 ;
2363
setsockopt ( fd , SOL_SOCKET , SO_REUSEADDR , ( char * ) & val , sizeof ( val ));
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
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 */
2387
gdb_accept ();
2388
2389
return 0 ;
}
2390
2391
2392
2393
2394
/* Disable gdb stub for child processes. */
void gdbserver_fork ( CPUState * env )
{
GDBState * s = gdbserver_state ;
2395
if ( gdbserver_fd < 0 || s -> fd < 0 )
2396
2397
2398
2399
2400
2401
return ;
close ( s -> fd );
s -> fd = - 1 ;
cpu_breakpoint_remove_all ( env , BP_GDB );
cpu_watchpoint_remove_all ( env , BP_GDB );
}
2402
# else
ths
authored
18 years ago
2403
static int gdb_chr_can_receive ( void * opaque )
2404
{
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/* We can handle an arbitrarily large amount of data .
Pick the maximum packet size , which is as good as anything . */
return MAX_PACKET_LENGTH ;
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}
ths
authored
18 years ago
2410
static void gdb_chr_receive ( void * opaque , const uint8_t * buf , int size )
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{
int i ;
for ( i = 0 ; i < size ; i ++ ) {
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gdb_read_byte ( gdbserver_state , buf [ i ]);
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}
}
static void gdb_chr_event ( void * opaque , int event )
{
switch ( event ) {
case CHR_EVENT_RESET :
vm_stop ( EXCP_INTERRUPT );
2424
gdb_has_xml = 0 ;
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break ;
default :
break ;
}
}
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static void gdb_monitor_output ( GDBState * s , const char * msg , int len )
{
char buf [ MAX_PACKET_LENGTH ];
buf [ 0 ] = 'O' ;
if ( len > ( MAX_PACKET_LENGTH / 2 ) - 1 )
len = ( MAX_PACKET_LENGTH / 2 ) - 1 ;
memtohex ( buf + 1 , ( uint8_t * ) msg , len );
put_packet ( s , buf );
}
static int gdb_monitor_write ( CharDriverState * chr , const uint8_t * buf , int len )
{
const char * p = ( const char * ) buf ;
int max_sz ;
max_sz = ( sizeof ( gdbserver_state -> last_packet ) - 2 ) / 2 ;
for (;;) {
if ( len <= max_sz ) {
gdb_monitor_output ( gdbserver_state , p , len );
break ;
}
gdb_monitor_output ( gdbserver_state , p , max_sz );
p += max_sz ;
len -= max_sz ;
}
return len ;
}
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# ifndef _WIN32
static void gdb_sigterm_handler ( int signal )
{
if ( vm_running )
vm_stop ( EXCP_INTERRUPT );
}
# endif
int gdbserver_start ( const char * device )
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{
GDBState * s ;
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char gdbstub_device_name [ 128 ];
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CharDriverState * chr = NULL ;
CharDriverState * mon_chr ;
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if ( ! device )
return - 1 ;
if ( strcmp ( device , "none" ) != 0 ) {
if ( strstart ( device , "tcp:" , NULL )) {
/* enforce required TCP attributes */
snprintf ( gdbstub_device_name , sizeof ( gdbstub_device_name ),
"%s,nowait,nodelay,server" , device );
device = gdbstub_device_name ;
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}
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# ifndef _WIN32
else if ( strcmp ( device , "stdio" ) == 0 ) {
struct sigaction act ;
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memset ( & act , 0 , sizeof ( act ));
act . sa_handler = gdb_sigterm_handler ;
sigaction ( SIGINT , & act , NULL );
}
# endif
chr = qemu_chr_open ( "gdb" , device , NULL );
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if ( ! chr )
return - 1 ;
qemu_chr_add_handlers ( chr , gdb_chr_can_receive , gdb_chr_receive ,
gdb_chr_event , NULL );
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}
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s = gdbserver_state ;
if ( ! s ) {
s = qemu_mallocz ( sizeof ( GDBState ));
gdbserver_state = s ;
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qemu_add_vm_change_state_handler ( gdb_vm_state_change , NULL );
/* Initialize a monitor terminal for gdb */
mon_chr = qemu_mallocz ( sizeof ( * mon_chr ));
mon_chr -> chr_write = gdb_monitor_write ;
monitor_init ( mon_chr , 0 );
} else {
if ( s -> chr )
qemu_chr_close ( s -> chr );
mon_chr = s -> mon_chr ;
memset ( s , 0 , sizeof ( GDBState ));
}
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s -> c_cpu = first_cpu ;
s -> g_cpu = first_cpu ;
2520
s -> chr = chr ;
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s -> state = chr ? RS_IDLE : RS_INACTIVE ;
s -> mon_chr = mon_chr ;
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return 0 ;
}
2526
# endif