diff options
Diffstat (limited to 'linux-user/strace.c')
| -rw-r--r-- | linux-user/strace.c | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/linux-user/strace.c b/linux-user/strace.c new file mode 100644 index 000000000..d7c18c63c --- /dev/null +++ b/linux-user/strace.c @@ -0,0 +1,313 @@ +#include <stdio.h> +#include <errno.h> +#include <sys/ipc.h> +#include <sys/msg.h> +#include <sys/sem.h> +#include <sys/shm.h> +#include <sys/select.h> +#include <sys/types.h> +#include <unistd.h> +#include "qemu.h" + +int do_strace=0; + +struct syscallname { + int nr; + char *name; + char *format; + void (*call)(struct syscallname *, + abi_long, abi_long, abi_long, + abi_long, abi_long, abi_long); + void (*result)(struct syscallname *, abi_long); +}; + +/* + * Utility functions + */ +static void +print_ipc_cmd(int cmd) +{ +#define output_cmd(val) \ +if( cmd == val ) { \ + gemu_log(#val); \ + return; \ +} + + cmd &= 0xff; + + /* General IPC commands */ + output_cmd( IPC_RMID ); + output_cmd( IPC_SET ); + output_cmd( IPC_STAT ); + output_cmd( IPC_INFO ); + /* msgctl() commands */ + #ifdef __USER_MISC + output_cmd( MSG_STAT ); + output_cmd( MSG_INFO ); + #endif + /* shmctl() commands */ + output_cmd( SHM_LOCK ); + output_cmd( SHM_UNLOCK ); + output_cmd( SHM_STAT ); + output_cmd( SHM_INFO ); + /* semctl() commands */ + output_cmd( GETPID ); + output_cmd( GETVAL ); + output_cmd( GETALL ); + output_cmd( GETNCNT ); + output_cmd( GETZCNT ); + output_cmd( SETVAL ); + output_cmd( SETALL ); + output_cmd( SEM_STAT ); + output_cmd( SEM_INFO ); + output_cmd( IPC_RMID ); + output_cmd( IPC_RMID ); + output_cmd( IPC_RMID ); + output_cmd( IPC_RMID ); + output_cmd( IPC_RMID ); + output_cmd( IPC_RMID ); + output_cmd( IPC_RMID ); + output_cmd( IPC_RMID ); + output_cmd( IPC_RMID ); + + /* Some value we don't recognize */ + gemu_log("%d",cmd); +} + +#ifdef TARGET_NR__newselect +static void +print_fdset(int n, abi_ulong target_fds_addr) +{ + int i; + + gemu_log("["); + if( target_fds_addr ) { + abi_long *target_fds; + + target_fds = lock_user(VERIFY_READ, + target_fds_addr, + sizeof(*target_fds)*(n / TARGET_ABI_BITS + 1), + 1); + + if (!target_fds) + return; + + for (i=n; i>=0; i--) { + if ((tswapl(target_fds[i / TARGET_ABI_BITS]) >> (i & (TARGET_ABI_BITS - 1))) & 1) + gemu_log("%d,", i ); + } + unlock_user(target_fds, target_fds_addr, 0); + } + gemu_log("]"); +} + +static void +print_timeval(abi_ulong tv_addr) +{ + if( tv_addr ) { + struct target_timeval *tv; + + tv = lock_user(VERIFY_READ, tv_addr, sizeof(*tv), 1); + if (!tv) + return; + gemu_log("{" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "}", + tv->tv_sec, tv->tv_usec); + unlock_user(tv, tv_addr, 0); + } else + gemu_log("NULL"); +} +#endif + +/* + * Sysycall specific output functions + */ + +/* select */ +#ifdef TARGET_NR__newselect +static long newselect_arg1 = 0; +static long newselect_arg2 = 0; +static long newselect_arg3 = 0; +static long newselect_arg4 = 0; +static long newselect_arg5 = 0; + +static void +print_newselect(struct syscallname *name, + abi_long arg1, abi_long arg2, abi_long arg3, + abi_long arg4, abi_long arg5, abi_long arg6) +{ + gemu_log("%s(" TARGET_ABI_FMT_ld ",", name->name, arg1); + print_fdset(arg1, arg2); + gemu_log(","); + print_fdset(arg1, arg3); + gemu_log(","); + print_fdset(arg1, arg4); + gemu_log(","); + print_timeval(arg5); + gemu_log(")"); + + /* save for use in the return output function below */ + newselect_arg1=arg1; + newselect_arg2=arg2; + newselect_arg3=arg3; + newselect_arg4=arg4; + newselect_arg5=arg5; +} +#endif + +static void +print_semctl(struct syscallname *name, + abi_long arg1, abi_long arg2, abi_long arg3, + abi_long arg4, abi_long arg5, abi_long arg6) +{ + gemu_log("%s(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ",", name->name, arg1, arg2); + print_ipc_cmd(arg3); + gemu_log(",0x" TARGET_ABI_FMT_lx ")", arg4); +} + +static void +print_execve(struct syscallname *name, + abi_long arg1, abi_long arg2, abi_long arg3, + abi_long arg4, abi_long arg5, abi_long arg6) +{ + abi_ulong arg_ptr_addr; + char *s; + + if (!(s = lock_user_string(arg1))) + return; + gemu_log("%s(\"%s\",{", name->name, s); + unlock_user(s, arg1, 0); + + for (arg_ptr_addr = arg2; ; arg_ptr_addr += sizeof(abi_ulong)) { + abi_ulong *arg_ptr, arg_addr, s_addr; + + arg_ptr = lock_user(VERIFY_READ, arg_ptr_addr, sizeof(abi_ulong), 1); + if (!arg_ptr) + return; + arg_addr = tswapl(*arg_ptr); + unlock_user(arg_ptr, arg_ptr_addr, 0); + if (!arg_addr) + break; + if ((s = lock_user_string(arg_addr))) { + gemu_log("\"%s\",", s); + unlock_user(s, s_addr, 0); + } + } + + gemu_log("NULL})"); +} + +#ifdef TARGET_NR_ipc +static void +print_ipc(struct syscallname *name, + abi_long arg1, abi_long arg2, abi_long arg3, + abi_long arg4, abi_long arg5, abi_long arg6) +{ + switch(arg1) { + case IPCOP_semctl: + name->name = "semctl"; + print_semctl(name,arg2,arg3,arg4,arg5,arg6,0); + break; + default: + gemu_log("%s(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ")", + name->name, arg1, arg2, arg3, arg4); + } +} +#endif + +/* + * Variants for the return value output function + */ + +static void +print_syscall_ret_addr(struct syscallname *name, abi_long ret) +{ +if( ret == -1 ) { + gemu_log(" = -1 errno=%d (%s)\n", errno, target_strerror(errno)); + } else { + gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret); + } +} + +#if 0 /* currently unused */ +static void +print_syscall_ret_raw(struct syscallname *name, abi_long ret) +{ + gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret); +} +#endif + +#ifdef TARGET_NR__newselect +static void +print_syscall_ret_newselect(struct syscallname *name, abi_long ret) +{ + gemu_log(" = 0x" TARGET_ABI_FMT_lx " (", ret); + print_fdset(newselect_arg1,newselect_arg2); + gemu_log(","); + print_fdset(newselect_arg1,newselect_arg3); + gemu_log(","); + print_fdset(newselect_arg1,newselect_arg4); + gemu_log(","); + print_timeval(newselect_arg5); + gemu_log(")\n"); +} +#endif + +/* + * An array of all of the syscalls we know about + */ + +static struct syscallname scnames[] = { +#include "strace.list" +}; + +static int nsyscalls = sizeof(scnames)/sizeof(struct syscallname); + +/* + * The public interface to this module. + */ +void +print_syscall(int num, + abi_long arg1, abi_long arg2, abi_long arg3, + abi_long arg4, abi_long arg5, abi_long arg6) +{ + int i; + char *format="%s(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ")"; + + gemu_log("%d ", getpid() ); + + for(i=0;i<nsyscalls;i++) + if( scnames[i].nr == num ) { + if( scnames[i].call != NULL ) { + scnames[i].call(&scnames[i],arg1,arg2,arg3,arg4,arg5,arg6); + } else { + /* XXX: this format system is broken because it uses + host types and host pointers for strings */ + if( scnames[i].format != NULL ) + format = scnames[i].format; + gemu_log(format,scnames[i].name, arg1,arg2,arg3,arg4,arg5,arg6); + } + break; + } +} + + +void +print_syscall_ret(int num, abi_long ret) +{ + int i; + + for(i=0;i<nsyscalls;i++) + if( scnames[i].nr == num ) { + if( scnames[i].result != NULL ) { + scnames[i].result(&scnames[i],ret); + } else { + if( ret < 0 ) { + gemu_log(" = -1 errno=" TARGET_ABI_FMT_ld " (%s)\n", -ret, target_strerror(-ret)); + } else { + gemu_log(" = " TARGET_ABI_FMT_ld "\n", ret); + } + } + break; + } +} + |