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linux-user: /proc/self/maps content

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Build /proc/self/maps doing a match against guest memory translation table.
Output only that map records which are valid for guest memory layout.

Signed-off-by: Mikhail Ilyin <m.ilin@samsung.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Mikhail Ilyin 2014-08-05 17:33:51 +04:00 committed by Riku Voipio
parent fd3cced366
commit d67f4aaae8
2 changed files with 12 additions and 15 deletions
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2
include/exec/cpu-all.h
View File

@ -198,6 +198,8 @@ extern unsigned long reserved_va;
#define RESERVED_VA 0ul
#endif
#define GUEST_ADDR_MAX (RESERVED_VA ? RESERVED_VA : \
(1ul << TARGET_VIRT_ADDR_SPACE_BITS) - 1)
#endif
/* page related stuff */

21
linux-user/syscall.c
View File

@ -5092,10 +5092,8 @@ static int open_self_cmdline(void *cpu_env, int fd)
static int open_self_maps(void *cpu_env, int fd)
{
#if defined(TARGET_ARM) || defined(TARGET_M68K) || defined(TARGET_UNICORE32)
CPUState *cpu = ENV_GET_CPU((CPUArchState *)cpu_env);
TaskState *ts = cpu->opaque;
#endif
FILE *fp;
char *line = NULL;
size_t len = 0;
@ -5118,13 +5116,18 @@ static int open_self_maps(void *cpu_env, int fd)
if ((fields < 10) || (fields > 11)) {
continue;
}
if (!strncmp(path, "[stack]", 7)) {
if (h2g_valid(min)) {
int flags = page_get_flags(h2g(min));
max = h2g_valid(max - 1) ? max : (uintptr_t)g2h(GUEST_ADDR_MAX);
if (page_check_range(h2g(min), max - min, flags) == -1) {
continue;
}
if (h2g_valid(min) && h2g_valid(max)) {
if (h2g(min) == ts->info->stack_limit) {
pstrcpy(path, sizeof(path), " [stack]");
}
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,
h2g(min), h2g(max - 1) + 1, flag_r, flag_w,
flag_x, flag_p, offset, dev_maj, dev_min, inode,
path[0] ? " " : "", path);
}
@ -5133,14 +5136,6 @@ static int open_self_maps(void *cpu_env, int fd)
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->info->start_stack +
(TARGET_PAGE_SIZE - 1)) & TARGET_PAGE_MASK,
(unsigned long long)0);
#endif
return 0;
}