libs/newlib-cygwin
libs
/
newlib-cygwin
mirror of git://sourceware.org/git/newlib-cygwin.git
4
0
Fork 0
Code Issues Projects Releases Wiki Activity

* dcrt0.cc (getstack): Try harder to modify memory. 

(alloc_stack): Alloc page prior to stack top, too.
This commit is contained in:
Christopher Faylor 2005-12-02 03:12:06 +00:00
parent 032295a988
commit e7f6a31bb0
2 changed files with 11 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,8 @@
2005-12-01 Christopher Faylor <cgf@timesys.com>
* dcrt0.cc (getstack): Try harder to modify memory.
(alloc_stack): Alloc page prior to stack top, too.
2005-12-01 Christopher Faylor <cgf@timesys.com>
* devices.h (_major): Revert previous ill-advised change.

10
winsup/cygwin/dcrt0.cc
View File

@ -504,9 +504,10 @@ alloc_stack_hard_way (child_info_fork *ci, volatile char *b)
void *getstack (void *) __attribute__ ((noinline));
volatile char *
getstack (volatile char *p)
getstack (volatile char * volatile p)
{
*p |= 0;
*p ^= 1;
*p ^= 1;
return p - 4096;
}
@ -515,13 +516,14 @@ getstack (volatile char *p)
static void
alloc_stack (child_info_fork *ci)
{
volatile char *esp;
volatile char * volatile esp;
__asm__ volatile ("movl %%esp,%0": "=r" (esp));
if (_tlsbase != ci->stackbottom)
alloc_stack_hard_way (ci, esp);
else
{
while (_tlstop > ci->stacktop)
char *stacktop = (char *) ci->stacktop - 4096;
while (_tlstop >= stacktop)
esp = getstack (esp);
ci->stacksize = 0;
}