commit 97374d38583028b33074c69caf296d94cb1b9d5b
author Paul Brook <paul@codesourcery.com> Wed Jun 16 13:03:51 2010 +0100
committer Paul Brook <paul@codesourcery.com> Wed Jun 16 13:03:51 2010 +0100
tree 20dd2e75e0b7dcf623a084e19e3f5e39a9161f31
parent 9e0b74a43f5ab94acdc5b450747b8f6c184e0062

Usermode exec-stack fix

When loading a shared library that requires an executable stack,
glibc uses the mprotext PROT_GROWSDOWN flag to achieve this.
We don't support PROT_GROWSDOWN.
Add a special case to handle changing the stack permissions in this way.

Signed-off-by: Paul Brook <paul@codesourcery.com>

linux-user/flatload.c

diff --git a/linux-user/flatload.c b/linux-user/flatload.c
index 914de1f..8ad130a 100644
--- a/linux-user/flatload.c
+++ b/linux-user/flatload.c
@@ -802,6 +802,7 @@
     info->end_data = libinfo[0].end_data;
     info->start_brk = libinfo[0].start_brk;
     info->start_stack = sp;
+    info->stack_limit = libinfo[0].start_brk;
     info->entry = start_addr;
     info->code_offset = info->start_code;
     info->data_offset = info->start_data - libinfo[0].text_len;