From 059e727a9a4be00de949769105e9e0ea876fc64b Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Wed, 2 Nov 2011 09:23:24 +0000 Subject: [PATCH 05/33] 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 --- 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 1ecc0e1..8727249 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -4603,6 +4603,20 @@ 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 { @@ -4611,6 +4625,7 @@ 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 } }; -- 1.6.0.2