Skip to content

Commit

Permalink
Add new files fir strace support, missed in earlier commit.
Browse files Browse the repository at this point in the history 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3504 c046a42c-6fe2-441c-8c8c-71466251a162
  • Loading branch information
ths committed Nov 1, 2007
1 parent 93a0019 commit 33189d3
Show file tree
Hide file tree
Showing 2 changed files with 1,814 additions and 0 deletions.
299 changes: 299 additions & 0 deletions linux-user/strace.c
View file
Original file line number Diff line number Diff line change
@@ -0,0 +1,299 @@
#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 *,
target_long, target_long, target_long,
target_long, target_long, target_long);
void (*result)(struct syscallname *, target_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);
}

static void
print_fdset(int n, target_ulong target_fds_addr)
{
int i;

gemu_log("[");
if( target_fds_addr ) {
target_long *target_fds;

if (!access_ok(VERIFY_READ, target_fds_addr, sizeof(*target_fds)*(n / TARGET_LONG_BITS + 1)))
return;

target_fds = lock_user(target_fds_addr, sizeof(*target_fds)*(n / TARGET_LONG_BITS + 1), 1);
for (i=n; i>=0; i--) {
if ((tswapl(target_fds[i / TARGET_LONG_BITS]) >> (i & (TARGET_LONG_BITS - 1))) & 1)
gemu_log("%d,", i );
}
unlock_user(target_fds, target_fds_addr, 0);
}
gemu_log("]");
}

static void
print_timeval(target_ulong tv_addr)
{
if( tv_addr ) {
struct target_timeval *tv;

if (!access_ok(VERIFY_READ, tv_addr, sizeof(*tv)))
return;

tv = lock_user(tv_addr, sizeof(*tv), 1);
gemu_log("{%d,%d}", tv->tv_sec, tv->tv_usec);
unlock_user(tv, tv_addr, 0);
} else
gemu_log("NULL");
}

/*
* Sysycall specific output functions
*/

/* select */
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,
target_long arg1, target_long arg2, target_long arg3,
target_long arg4, target_long arg5, target_long arg6)
{
gemu_log("%s(" TARGET_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;
}

static void
print_semctl(struct syscallname *name,
target_long arg1, target_long arg2, target_long arg3,
target_long arg4, target_long arg5, target_long arg6)
{
gemu_log("%s(" TARGET_FMT_ld "," TARGET_FMT_ld ",", name->name, arg1, arg2);
print_ipc_cmd(arg3);
gemu_log(",0x" TARGET_FMT_lx ")", arg4);
}

static void
print_execve(struct syscallname *name,
target_long arg1, target_long arg2, target_long arg3,
target_long arg4, target_long arg5, target_long arg6)
{
target_ulong arg_ptr_addr;
char *s;

if (!access_ok(VERIFY_READ, arg1, 1))
return;

s = lock_user_string(arg1);
gemu_log("%s(\"%s\",{", name->name, s);
unlock_user(s, arg1, 0);

for (arg_ptr_addr = arg2; ; arg_ptr_addr += sizeof(target_ulong)) {
target_ulong *arg_ptr, arg_addr, s_addr;

if (!access_ok(VERIFY_READ, arg_ptr_addr, sizeof(target_ulong)))
return;

arg_ptr = lock_user(arg_ptr_addr, sizeof(target_ulong), 1);
arg_addr = tswapl(*arg_ptr);
unlock_user(arg_ptr, arg_ptr_addr, 0);
if (!arg_addr)
break;
s = lock_user_string(arg_addr);
gemu_log("\"%s\",", s);
unlock_user(s, s_addr, 0);
}

gemu_log("NULL})");
}

static void
print_ipc(struct syscallname *name,
target_long arg1, target_long arg2, target_long arg3,
target_long arg4, target_long arg5, target_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_FMT_ld "," TARGET_FMT_ld "," TARGET_FMT_ld "," TARGET_FMT_ld ")",
name->name, arg1, arg2, arg3, arg4);
}
}

/*
* Variants for the return value output function
*/

static void
print_syscall_ret_addr(struct syscallname *name, target_long ret)
{
if( ret == -1 ) {
gemu_log(" = -1 errno=%d (%s)\n", errno, target_strerror(errno));
} else {
gemu_log(" = " TARGET_FMT_lx "\n", ret);
}
}

static void
print_syscall_ret_raw(struct syscallname *name, target_long ret)
{
gemu_log(" = " TARGET_FMT_lx "\n", ret);
}

static void
print_syscall_ret_newselect(struct syscallname *name, target_long ret)
{
gemu_log(" = " TARGET_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");
}

/*
* 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,
target_long arg1, target_long arg2, target_long arg3,
target_long arg4, target_long arg5, target_long arg6)
{
int i;
char *format="%s(%ld,%ld,%ld,%ld,%ld,%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 {
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, target_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=%d (%s)\n", -ret, target_strerror(-ret));
} else {
gemu_log(" = %d\n", ret);
}
}
break;
}
}

Loading

0 comments on commit 33189d3

Please sign in to comment.