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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
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+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