diff options
| author | Alexander Graf <agraf@suse.de> | 2011-11-02 20:23:24 +0100 |
|---|---|---|
| committer | Riku Voipio <riku.voipio@linaro.org> | 2012-02-02 17:51:20 +0200 |
| commit | 36c08d498b8ea6995666b805d37c6bb14da66a97 (patch) | |
| tree | 62e0e954e4c889e295088dd87ddb7b743efd0fda | |
| parent | 3be14d05d45774b67398debe42e3bb5524998f4f (diff) | |
linux-user: fake /proc/self/maps
glibc's pthread_attr_getstack tries to find the stack range from
/proc/self/maps. Unfortunately, /proc is usually the host's /proc
which means linux-user guests see qemu's stack there.
Fake the file with a constructed maps entry that exposes the guest's
stack range.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
| -rw-r--r-- | linux-user/syscall.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index e100025b0d..1864d7fa12 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -4600,6 +4600,20 @@ int get_osversion(void) return osversion; } + +static int open_self_maps(void *cpu_env, int fd) +{ + TaskState *ts = ((CPUState *)cpu_env)->opaque; + + 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); + + return 0; +} + static int do_open(void *cpu_env, const char *pathname, int flags, mode_t mode) { struct fake_open { @@ -4608,6 +4622,7 @@ static int do_open(void *cpu_env, const char *pathname, int flags, mode_t mode) }; const struct fake_open *fake_open; static const struct fake_open fakes[] = { + { "/proc/self/maps", open_self_maps }, { NULL, NULL } }; |