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* sysdeps/unix/sysv/linux/i386/getcontext.S: Don't touch the %gs
	register so that contexts can be used in different threads.
	* sysdeps/unix/sysv/linux/i386/setcontext.S: Likewise.
	* sysdeps/unix/sysv/linux/i386/swapcontext.S: Likewise.
This commit is contained in:
Ulrich Drepper 2001-07-31 20:57:24 +00:00
parent ad71126b24
commit e14b144780
5 changed files with 20 additions and 20 deletions
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5
ChangeLog
View File

@ -1,5 +1,10 @@
2001-07-31 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/i386/getcontext.S: Don't touch the %gs
register so that contexts can be used in different threads.
* sysdeps/unix/sysv/linux/i386/setcontext.S: Likewise.
* sysdeps/unix/sysv/linux/i386/swapcontext.S: Likewise.
* sysdeps/unix/sysv/linux/cmsg_nxthdr.c (__cmsg_nxthdr): Correct
test for cmsg struct size.
* sysdeps/unix/sysv/linux/bits/socket.h (__cmsg_nxthdr): Likewise.

3
linuxthreads/ChangeLog
View File

@ -1,5 +1,8 @@
2001-07-31 Ulrich Drepper <drepper@redhat.com>
* tst-context.c (threadfct): Initialize context before calling
makecontext.
* Examples/ex17.c: Make sure test thread is around long enough.
2001-07-26 kaz Kojima <kkojima@rr.iij4u.or.jp>

10
sysdeps/unix/sysv/linux/i386/getcontext.S
View File

@ -43,13 +43,11 @@ ENTRY(__getcontext)
movl %ecx, oESP(%eax)
movl %ebx, oEBX(%eax)
/* Save the FS and GS segment register. */
/* Save the FS segment register. We don't touch the GS register
since it is used for threads. */
xorl %edx, %edx
xorl %ecx, %ecx
movw %gs, %dx
movw %fs, %cx
movl %edx, oGS(%eax)
movl %ecx, oFS(%eax)
movw %fs, %dx
movl %edx, oFS(%eax)
/* We have separate floating-point register content memory on the
stack. We use the __fpregs_mem block in the context. Set the

5
sysdeps/unix/sysv/linux/i386/setcontext.S
View File

@ -48,10 +48,9 @@ ENTRY(__setcontext)
movl oFPREGS(%eax), %ecx
fldenv (%ecx)
/* Restore the FS and GS segment registers. */
movl oGS(%eax), %edx
/* Restore the FS segment register. We don't touch the GS register
since it is used for threads. */
movl oFS(%eax), %ecx
movw %dx, %gs
movw %cx, %fs
/* Load the new stack pointer. */

17
sysdeps/unix/sysv/linux/i386/swapcontext.S
View File

@ -43,13 +43,10 @@ ENTRY(__swapcontext)
movl %ecx, oESP(%eax)
movl %ebx, oEBX(%eax)
/* Save the FS and GS segment register. */
/* Save the FS segment register. */
xorl %edx, %edx
xorl %ecx, %ecx
movw %gs, %dx
movw %fs, %cx
movl %edx, oGS(%eax)
movl %ecx, oFS(%eax)
movw %fs, %dx
movl %edx, oFS(%eax)
/* We have separate floating-point register content memory on the
stack. We use the __fpregs_mem block in the context. Set the
@ -81,11 +78,9 @@ ENTRY(__swapcontext)
movl oFPREGS(%eax), %ecx
fldenv (%ecx)
/* Restore the FS and GS segment registers. */
movl oGS(%eax), %edx
movl oFS(%eax), %ecx
movw %dx, %gs
movw %cx, %fs
/* Restore the FS segment registers. */
movl oFS(%eax), %edx
movw %dx, %fs
/* Load the new stack pointer. */
movl oESP(%eax), %ecx