a799f071ba
- qemu-user: add device mapper and loopback ioctls, enabling kpatkx OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=40
65 lines
1.8 KiB
Diff
65 lines
1.8 KiB
Diff
From 7ee3fd47eed19e4dfa26a8d0176ed3550b8d0ccf Mon Sep 17 00:00:00 2001
|
|
From: Alexander Graf <agraf@suse.de>
|
|
Date: Wed, 2 Nov 2011 09:23:25 +0000
|
|
Subject: [PATCH] linux-user: fake /proc/self/stat
|
|
|
|
The boehm gc finds the program's stack starting pointer by
|
|
checking /proc/self/stat. Unfortunately, so far it reads
|
|
qemu's stack pointer which clearly is wrong.
|
|
|
|
So let's instead fake the file so the guest program sees the
|
|
right address.
|
|
|
|
Signed-off-by: Alexander Graf <agraf@suse.de>
|
|
---
|
|
linux-user/syscall.c | 26 ++++++++++++++++++++++++++
|
|
1 files changed, 26 insertions(+), 0 deletions(-)
|
|
|
|
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
|
|
index 8727249..5eefd01 100644
|
|
--- a/linux-user/syscall.c
|
|
+++ b/linux-user/syscall.c
|
|
@@ -4617,6 +4617,31 @@ static int open_self_maps(void *cpu_env, int fd)
|
|
return 0;
|
|
}
|
|
|
|
+static int open_self_stat(void *cpu_env, int fd)
|
|
+{
|
|
+ TaskState *ts = ((CPUState *)cpu_env)->opaque;
|
|
+ abi_ulong start_stack = ts->info->start_stack;
|
|
+ int i;
|
|
+
|
|
+ for (i = 0; i < 44; i++) {
|
|
+ char buf[128];
|
|
+ int len;
|
|
+ uint64_t val = 0;
|
|
+
|
|
+ if (i == 27) {
|
|
+ /* stack bottom */
|
|
+ val = start_stack;
|
|
+ }
|
|
+ snprintf(buf, sizeof(buf), "%"PRId64 "%c", val, i == 43 ? '\n' : ' ');
|
|
+ len = strlen(buf);
|
|
+ if (write(fd, buf, len) != len) {
|
|
+ return -1;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
static int do_open(void *cpu_env, const char *pathname, int flags, mode_t mode)
|
|
{
|
|
struct fake_open {
|
|
@@ -4626,6 +4651,7 @@ 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 },
|
|
+ { "/proc/self/stat", open_self_stat },
|
|
{ NULL, NULL }
|
|
};
|
|
|
|
--
|
|
1.6.0.2
|
|
|