3d5fb0946f
for update_git.sh OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=62
66 lines
2.0 KiB
Diff
66 lines
2.0 KiB
Diff
From 53bd82c12dac42df6c602aee6a93b3ea39e134da Mon Sep 17 00:00:00 2001
|
|
From: Alexander Graf <agraf@suse.de>
|
|
Date: Wed, 2 Nov 2011 09:23:26 +0000
|
|
Subject: [PATCH] linux-user: fake /proc/self/auxv
|
|
|
|
Gtk tries to read /proc/self/auxv to find its auxv table instead of
|
|
taking it from its own program memory space.
|
|
|
|
However, when running with linux-user, we see the host's auxv which
|
|
clearly exposes wrong information. so let's instead expose the guest
|
|
memory backed auxv tables via /proc/self/auxv as well.
|
|
|
|
Signed-off-by: Alexander Graf <agraf@suse.de>
|
|
---
|
|
linux-user/syscall.c | 30 ++++++++++++++++++++++++++++++
|
|
1 files changed, 30 insertions(+), 0 deletions(-)
|
|
|
|
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
|
|
index 5eefd01..3e6f3bd 100644
|
|
--- a/linux-user/syscall.c
|
|
+++ b/linux-user/syscall.c
|
|
@@ -4642,6 +4642,35 @@ static int open_self_stat(void *cpu_env, int fd)
|
|
return 0;
|
|
}
|
|
|
|
+static int open_self_auxv(void *cpu_env, int fd)
|
|
+{
|
|
+ TaskState *ts = ((CPUState *)cpu_env)->opaque;
|
|
+ abi_ulong auxv = ts->info->saved_auxv;
|
|
+ abi_ulong len = ts->info->auxv_len;
|
|
+ char *ptr;
|
|
+
|
|
+ /*
|
|
+ * Auxiliary vector is stored in target process stack.
|
|
+ * read in whole auxv vector and copy it to file
|
|
+ */
|
|
+ ptr = lock_user(VERIFY_READ, auxv, len, 0);
|
|
+ if (ptr != NULL) {
|
|
+ while (len > 0) {
|
|
+ ssize_t r;
|
|
+ r = write(fd, ptr, len);
|
|
+ if (r <= 0) {
|
|
+ break;
|
|
+ }
|
|
+ len -= r;
|
|
+ ptr += r;
|
|
+ }
|
|
+ lseek(fd, 0, SEEK_SET);
|
|
+ unlock_user(ptr, auxv, len);
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
static int do_open(void *cpu_env, const char *pathname, int flags, mode_t mode)
|
|
{
|
|
struct fake_open {
|
|
@@ -4652,6 +4681,7 @@ static int do_open(void *cpu_env, const char *pathname, int flags, mode_t mode)
|
|
static const struct fake_open fakes[] = {
|
|
{ "/proc/self/maps", open_self_maps },
|
|
{ "/proc/self/stat", open_self_stat },
|
|
+ { "/proc/self/auxv", open_self_auxv },
|
|
{ NULL, NULL }
|
|
};
|
|
|