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Merge remote-tracking branch 'riku/linux-user-for-upstream' into staging

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* riku/linux-user-for-upstream:
  linux-user: fix emulation of /proc/self/maps
  linux-user: Clean up interim solution for exit syscall
This commit is contained in:
Anthony Liguori 2012-05-08 09:37:00 -05:00
commit 233ffa1653
1 changed files with 41 additions and 5 deletions
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46
linux-user/syscall.c
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@ -4866,13 +4866,53 @@ int get_osversion(void)
static int open_self_maps(void *cpu_env, int fd)
{
#if defined(TARGET_ARM) || defined(TARGET_M68K) || defined(TARGET_UNICORE32)
TaskState *ts = ((CPUArchState *)cpu_env)->opaque;
#endif
FILE *fp;
char *line = NULL;
size_t len = 0;
ssize_t read;
fp = fopen("/proc/self/maps", "r");
if (fp == NULL) {
return -EACCES;
}
while ((read = getline(&line, &len, fp)) != -1) {
int fields, dev_maj, dev_min, inode;
uint64_t min, max, offset;
char flag_r, flag_w, flag_x, flag_p;
char path[512] = "";
fields = sscanf(line, "%"PRIx64"-%"PRIx64" %c%c%c%c %"PRIx64" %x:%x %d"
" %512s", &min, &max, &flag_r, &flag_w, &flag_x,
&flag_p, &offset, &dev_maj, &dev_min, &inode, path);
if ((fields < 10) || (fields > 11)) {
continue;
}
if (!strncmp(path, "[stack]", 7)) {
continue;
}
if (h2g_valid(min) && h2g_valid(max)) {
dprintf(fd, TARGET_ABI_FMT_lx "-" TARGET_ABI_FMT_lx
" %c%c%c%c %08" PRIx64 " %02x:%02x %d%s%s\n",
h2g(min), h2g(max), flag_r, flag_w,
flag_x, flag_p, offset, dev_maj, dev_min, inode,
path[0] ? " " : "", path);
}
}
free(line);
fclose(fp);
#if defined(TARGET_ARM) || defined(TARGET_M68K) || defined(TARGET_UNICORE32)
dprintf(fd, "%08llx-%08llx rw-p %08llx 00:00 0 [stack]\n",
(unsigned long long)ts->info->stack_limit,
(unsigned long long)(ts->stack_base + (TARGET_PAGE_SIZE - 1))
& TARGET_PAGE_MASK,
(unsigned long long)ts->stack_base);
(unsigned long long)0);
#endif
return 0;
}
@ -5045,11 +5085,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
NULL, NULL, 0);
}
thread_env = NULL;
#ifdef ENV_GET_CPU
object_delete(OBJECT(ENV_GET_CPU(cpu_env)));
#else
g_free(cpu_env);
#endif
g_free(ts);
pthread_exit(NULL);
}