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authorUlrich Drepper <drepper@redhat.com>2001-07-24 06:48:43 +0000
committerUlrich Drepper <drepper@redhat.com>2001-07-24 06:48:43 +0000
commit188356b8cca3cadc66664b8da11d342d45f95ff5 (patch)
tree7149c280b59df5c4770a517f87c9ea84f920767d /sysdeps
parent760b7056239a51e7fa1cbbd99b293c4366f64a1a (diff)
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Initialize %fs, %gs, and floating-point status as well.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/unix/sysv/linux/i386/makecontext.S16
1 files changed, 16 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/makecontext.S b/sysdeps/unix/sysv/linux/i386/makecontext.S
index 56b5537ce3..1ca3233945 100644
--- a/sysdeps/unix/sysv/linux/i386/makecontext.S
+++ b/sysdeps/unix/sysv/linux/i386/makecontext.S
@@ -40,6 +40,22 @@ ENTRY(__makecontext)
movl oLINK(%eax), %ecx
movl %ecx, -4(%edx)
+ /* Copy the FS and GS segment register. */
+ xorl %ecx, %ecx
+ movw %gs, %cx
+ movl %ecx, oGS(%eax)
+ xorl %ecx, %ecx
+ movw %fs, %cx
+ movl %ecx, oFS(%eax)
+
+ /* We have separate floating-point register content memory on the
+ stack. We use the __fpregs_mem block in the context. Set the
+ links up correctly. */
+ leal oFPREGSMEM(%eax), %ecx
+ movl %ecx, oFPREGS(%eax)
+ /* Save the floating-point context. */
+ fnstenv (%ecx)
+
/* Remember the number of parameters for the exit handler since
it has to remove them. We store the number in the EBX register
which the function we will call must preserve. */