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Commit 54c770da authored by Helge Deller's avatar Helge Deller
Browse files

parisc: Update comments in syscall.S regarding wide userland 



We do support running 64-bit userspace processes, although there isn't
yet full gcc and glibc support. Anyway, fix the comments to reflect the
reality.

Signed-off-by: default avatarHelge Deller <deller@gmx.de>
parent b6fc0ccc

arch/parisc/kernel/syscall.S

+3 −10
Original line number Diff line number Diff line
@@ -108,12 +108,8 @@ linux_gateway_entry: 
	mtsp	%r0,%sr6			/* get kernel space into sr6 */



#ifdef CONFIG_64BIT

	/* for now we can *always* set the W bit on entry to the syscall

	 * since we don't support wide userland processes.  We could

	 * also save the current SM other than in r0 and restore it on

	 * exit from the syscall, and also use that value to know

	 * whether to do narrow or wide syscalls. -PB

	 */

	/* Store W bit on entry to the syscall in case it's a wide userland

	 * process. */

	ssm	PSW_SM_W, %r1

	extrd,u	%r1,PSW_W_BIT,1,%r1

	/* sp must be aligned on 4, so deposit the W bit setting into
@@ -478,16 +474,13 @@ tracesys_sigexit: 
lws_start:



#ifdef CONFIG_64BIT

	/* FIXME: If we are a 64-bit kernel just

	 *        turn this on unconditionally.

	 */

	ssm	PSW_SM_W, %r1

	extrd,u	%r1,PSW_W_BIT,1,%r1

	/* sp must be aligned on 4, so deposit the W bit setting into

	 * the bottom of sp temporarily */

	or,ev	%r1,%r30,%r30



	/* Clip LWS number to a 32-bit value always */

	/* Clip LWS number to a 32-bit value for 32-bit processes */

	depdi	0, 31, 32, %r20

#endif