code: drawterm

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remove non-portable posix stuff, use C compiler builtins instead (thanks be0ba and thedæmon for testing)

diff: cannot open a/posix-386//null: file does not exist: 'a/posix-386//null' diff: cannot open a/posix-amd64//null: file does not exist: 'a/posix-amd64//null' diff: cannot open a/posix-arm//null: file does not exist: 'a/posix-arm//null' diff: cannot open a/posix-arm64//null: file does not exist: 'a/posix-arm64//null' diff: cannot open a/posix-mips//null: file does not exist: 'a/posix-mips//null' diff: cannot open a/posix-power//null: file does not exist: 'a/posix-power//null' diff: cannot open a/posix-ppc64le//null: file does not exist: 'a/posix-ppc64le//null' diff: cannot open a/posix-riscv64//null: file does not exist: 'a/posix-riscv64//null' diff: cannot open a/posix-sun4u//null: file does not exist: 'a/posix-sun4u//null' diff: cannot open a/win32-386//null: file does not exist: 'a/win32-386//null'

--- a/Make.android-386

+++ b/Make.android-386

@@ -19,8 +19,3 @@

 AUDIO=none

 all: default

-

-libmachdep.a:

-	arch=386; \

-	(cd posix-$$arch &&  make)

-

--- a/Make.android-amd64

+++ b/Make.android-amd64

@@ -19,8 +19,3 @@

 AUDIO=none

 all: default

-

-libmachdep.a:

-	arch=amd64; \

-	(cd posix-$$arch &&  make)

-

--- a/Make.android-arm

+++ b/Make.android-arm

@@ -20,7 +20,3 @@

 all: default

-libmachdep.a:

-	arch=arm; \

-	(cd posix-$$arch &&  make)

-

--- a/Make.android-arm64

+++ b/Make.android-arm64

@@ -19,8 +19,3 @@

 AUDIO=none

 all: default

-

-libmachdep.a:

-	arch=arm64; \

-	(cd posix-$$arch &&  make)

-

--- a/Make.dragonfly

+++ b/Make.dragonfly

@@ -15,7 +15,3 @@

 AUDIO=none

 all: default

-

-libmachdep.a:

-	arch=`uname -m|sed 's/i.86/386/;s/Power Macintosh/power/; s/x86_64/amd64/'`; \

-	(cd posix-$$arch &&  make)

--- a/Make.fbdev

+++ b/Make.fbdev

@@ -16,7 +16,3 @@

 AUDIO=alsa

 all: default

-

-libmachdep.a:

-	arch=`uname -m|sed 's/i.86/386/;s/Power Macintosh/power/; s/x86_64/amd64/; s/armv[567].*/arm/; s/aarch64/arm64/'`; \

-	(cd posix-$$arch &&  make)

--- a/Make.freebsd

+++ b/Make.freebsd

@@ -15,7 +15,3 @@

 AUDIO=unix

 all: default

-

-libmachdep.a:

-	arch=`uname -m|sed 's/i.86/386/;s/Power Macintosh/power/; s/x86_64/amd64/'`; \

-	(cd posix-$$arch &&  make)

--- a/Make.haiku

+++ b/Make.haiku

@@ -13,9 +13,4 @@

 LDFLAGS=

 TARG=drawterm

-

 all: default

-

-libmachdep.a:

-	arch=`uname -m|sed 's/BePC/386/; s/x86_64/amd64/; s/armv[567].*/arm/; s/aarch64/arm64/'`; \

-	(cd posix-$$arch &&  make)

--- a/Make.irix

+++ b/Make.irix

@@ -19,6 +19,3 @@

 MAKE=gmake

 all: default

-

-libmachdep.a:

-	(cd posix-mips && $(MAKE))

--- a/Make.linux

+++ b/Make.linux

@@ -15,7 +15,3 @@

 AUDIO=pipewire

 all: default

-

-libmachdep.a:

-	arch=`uname -m|sed 's/i.86/386/;s/Power Macintosh/power/; s/x86_64/amd64/; s/armv[567].*/arm/; s/aarch64/arm64/'`; \

-	(cd posix-$$arch &&  make)

--- a/Make.linux386

+++ b/Make.linux386

@@ -16,7 +16,3 @@

 AUDIO=unix

 all: default

-

-libmachdep.a:

-	arch=386; \

-	(cd posix-$$arch &&  make)

--- a/Make.netbsd

+++ b/Make.netbsd

@@ -16,7 +16,3 @@

 all: default

-libmachdep.a:

-	arch=`uname -m|sed 's/i.86/386/;s/Power Macintosh/power/; s/x86_64/amd64/'`; \

-	(cd posix-$$arch &&  make)

-

--- a/Make.openbsd

+++ b/Make.openbsd

@@ -14,7 +14,3 @@

 AUDIO=sndio

 all: default

-

-libmachdep.a:

-	arch=`uname -m|sed 's/i.86/386/; s/macppc/power/; s/socppc/power/; s/x86_64/amd64/; s/sparc64/sun4u/'`; \

-	(cd posix-$$arch &&  make)

--- a/Make.osx-cocoa

+++ b/Make.osx-cocoa

@@ -14,7 +14,3 @@

 AUDIO=none

 all: default

-

-libmachdep.a:

-	arch=`uname -m|sed 's/i.86/386/;s/x86_64/amd64/'`; \

-	(cd posix-$$arch &&  make)

--- a/Make.osx-x11

+++ b/Make.osx-x11

@@ -15,7 +15,3 @@

 AUDIO=none

 all: default

-

-libmachdep.a:

-	arch=`uname -m|sed 's/i.86/386/;s/Power Macintosh/power/; s/x86_64/amd64/'`; \

-	(cd posix-$$arch &&  make)

--- a/Make.pthread

+++ b/Make.pthread

@@ -17,7 +17,3 @@

 AUDIO=unix

 all: default

-

-libmachdep.a:

-	arch=`uname -m|sed 's/i.86/386/;s/Power Macintosh/power/; s/x86_64/amd64/; s/armv[567].*/arm/; s/aarch64/arm64/'`; \

-	(cd posix-$$arch &&  make)

--- a/Make.sun

+++ b/Make.sun

@@ -15,7 +15,3 @@

 AUDIO=none

 all: default

-

-libmachdep.a:

-	arch=`uname -m|sed 's/i.86/386/;s/Power Macintosh/power/'`; \

-	(cd posix-$$arch &&  make)

--- a/Make.unix

+++ b/Make.unix

@@ -17,7 +17,3 @@

 AUDIO=unix

 all: default

-

-libmachdep.a:

-	arch=`uname -m|sed 's/i.86/386/;s/Power Macintosh/power/; s/x86_64/amd64/; s/armv[567].*/arm/; s/aarch64/arm64/'`; \

-	(cd posix-$$arch &&  make)

--- a/Make.win32

+++ b/Make.win32

@@ -33,10 +33,6 @@

 all: default

-# for root

-libmachdep.a:

-	(cd win32-386; make)

-

 glenda-t.$O: glenda-t.rc glenda-t.ico

 	$(WINDRES) -i glenda-t.rc -o glenda-t.o

--- a/Make.win64

+++ b/Make.win64

@@ -23,10 +23,5 @@

 all: default

-# for root

-libmachdep.a:

-	(cd posix-amd64; make)

-

 glenda-t.$O: glenda-t.rc glenda-t.ico

 	$(WINDRES) -i glenda-t.rc -o glenda-t.o

-

--- a/Makefile

+++ b/Makefile

@@ -38,6 +38,9 @@

 clean:

 	rm -f *.o */*.o */*.a *.a drawterm drawterm.exe

+libmachdep.a:

+	(cd posix-port; $(MAKE))

+

 kern/libkern.a:

 	(cd kern; $(MAKE))

--- a/posix-386/Makefile

+++ /dev/null

@@ -1,18 +1,0 @@

-ROOT=..

-include ../Make.config

-LIB=../libmachdep.a

-

-OFILES=\

-	getcallerpc.$O\

-	tas.$O

-

-default: $(LIB)

-$(LIB): $(OFILES)

-	$(AR) r $(LIB) $(OFILES)

-	$(RANLIB) $(LIB)

-

-%.$O: %.c

-	$(CC) $(CFLAGS) $*.c

-

-%.$O: %.s

-	$(AS) -o $*.$O $*.s

--- a/posix-386/getcallerpc.c

+++ /dev/null

@@ -1,8 +1,0 @@

-#include "u.h"

-#include "libc.h"

-

-uintptr

-getcallerpc(void *a)

-{

-	return ((uintptr*)a)[-1];

-}

--- a/posix-386/tas.c

+++ /dev/null

@@ -1,23 +1,0 @@

-#include "u.h"

-#include "libc.h"

-

-int

-tas(int *x)

-{

-	int     v;

-

-	__asm__(	"movl   $1, %%eax\n\t"

-			"xchgl  %%eax,(%%ecx)"

-			: "=a" (v)

-			: "c" (x)

-	);

-	switch(v) {

-	case 0:

-	case 1:

-		return v;

-	default:

-		print("canlock: corrupted 0x%lux\n", v);

-		return 1;

-	}

-}

-

--- a/posix-amd64/Makefile

+++ /dev/null

@@ -1,15 +1,0 @@

-ROOT=..

-include ../Make.config

-LIB=../libmachdep.a

-

-OFILES=\

-	getcallerpc.$O\

-	tas.$O

-

-default: $(LIB)

-$(LIB): $(OFILES)

-	$(AR) r $(LIB) $(OFILES)

-	$(RANLIB) $(LIB)

-

-%.$O: %.c

-	$(CC) $(CFLAGS) $*.c

--- a/posix-amd64/getcallerpc.c

+++ /dev/null

@@ -1,8 +1,0 @@

-#include "u.h"

-#include "libc.h"

-

-uintptr

-getcallerpc(void *a)

-{

-	return ((uintptr*)a)[-1];

-}

--- a/posix-amd64/tas.c

+++ /dev/null

@@ -1,23 +1,0 @@

-#include "u.h"

-#include "libc.h"

-

-int

-tas(int *x)

-{

-	int     v;

-

-	__asm__(	"movl   $1, %%eax\n\t"

-				"xchgl  %%eax,(%%rcx)"

-				: "=a" (v)

-				: "c" (x)

-	);

-	switch(v) {

-	case 0:

-	case 1:

-		return v;

-	default:

-		print("canlock: corrupted 0x%lux\n", v);

-		return 1;

-	}

-}

-

--- a/posix-arm/Makefile

+++ /dev/null

@@ -1,23 +1,0 @@

-ROOT=..

-include ../Make.config

-LIB=../libmachdep.a

-

-OFILES=\

-	getcallerpc.$O\

-	tas.$O

-

-default: $(LIB)

-$(LIB): $(OFILES)

-	$(AR) r $(LIB) $(OFILES)

-	$(RANLIB) $(LIB)

-

-%.$O: %.c

-	$(CC) $(CFLAGS) $*.c

-

-%.$O: %.s

-	$(AS) -o $*.$O $*.s

-

-%.s: %.spp

-	cpp $*.spp >$*.s

-

-

--- a/posix-arm/getcallerpc.c

+++ /dev/null

@@ -1,8 +1,0 @@

-#include "u.h"

-#include "libc.h"

-

-uintptr

-getcallerpc(void *a)

-{

-	return ((uintptr*)a)[-1];

-}

--- a/posix-arm/tas.c

+++ /dev/null

@@ -1,35 +1,0 @@

-#include "u.h"

-#include "libc.h"

-

-int

-tas(int *x)

-{

-	int     v, t, i = 1;

-

-#if ARMv5

-	__asm__(

-		"swp  %0, %1, [%2]"

-		: "=&r" (v)

-		: "r" (1), "r" (x)

-		: "memory"

-	);

-#else

-	__asm__ (

-		"1:	ldrex	%0, [%2]\n"

-		"	strex	%1, %3, [%2]\n"

-		"	teq	%1, #0\n"

-		"	bne	1b"

-		: "=&r" (v), "=&r" (t)

-		: "r" (x), "r" (i)

-		: "cc");

-#endif

-	switch(v) {

-	case 0:

-	case 1:

-		return v;

-	default:

-		print("canlock: corrupted 0x%lux\n", v);

-		return 1;

-	}

-}

-

--- a/posix-arm64/Makefile

+++ /dev/null

@@ -1,22 +1,0 @@

-ROOT=..

-include ../Make.config

-LIB=../libmachdep.a

-

-OFILES=\

-	getcallerpc.$O\

-	tas.$O

-

-default: $(LIB)

-$(LIB): $(OFILES)

-	$(AR) r $(LIB) $(OFILES)

-	$(RANLIB) $(LIB)

-

-%.$O: %.c

-	$(CC) $(CFLAGS) $*.c

-

-%.$O: %.s

-	$(AS) -o $*.$O $*.s

-

-%.s: %.spp

-	cpp $*.spp >$*.s

-

--- a/posix-arm64/getcallerpc.c

+++ /dev/null

@@ -1,8 +1,0 @@

-#include "u.h"

-#include "libc.h"

-

-uintptr

-getcallerpc(void *a)

-{

-	return ((uintptr*)a)[-1];

-}

--- a/posix-arm64/tas.c

+++ /dev/null

@@ -1,34 +1,0 @@

-#include "u.h"

-#include "libc.h"

-

-#ifndef __has_builtin

-#define __has_builtin(x) 0

-#endif

-

-int

-tas(int *x)

-{

-#if __has_builtin(__atomic_test_and_set) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 7)))

-	return __atomic_test_and_set(x, __ATOMIC_ACQ_REL);

-#else

-	int     v,t, i = 1;

-

-	__asm__ (

-		"1:	ldxr	%0, [%2]\n"

-		"	stxr	%w1, %3, [%2]\n"

-		"	cmp	%1, #0\n"

-		"	bne	1b"

-		: "=&r" (v), "=&r" (t)

-		: "r" (x), "r" (i)

-		: "cc");

-

-	switch(v) {

-	case 0:

-	case 1:

-		return v;

-	default:

-		print("canlock: corrupted 0x%lux\n", v);

-		return 1;

-	}

-#endif

-}

--- a/posix-mips/Makefile

+++ /dev/null

@@ -1,16 +1,0 @@

-ROOT=..

-include ../Make.config

-LIB=../libmachdep.a

-

-OFILES=\

-	getcallerpc.$O\

-	tas.$O

-

-default: $(LIB)

-$(LIB): $(OFILES)

-	$(AR) r $(LIB) $(OFILES)

-	$(RANLIB) $(LIB)

-

-tas.$O: tas.s

-	ln -sf tas.s tas.S

-	$(CC) -c -o tas.$O -mips3 tas.S

--- a/posix-mips/getcallerpc.c

+++ /dev/null

@@ -1,8 +1,0 @@

-#include "u.h"

-#include "libc.h"

-

-uintptr

-getcallerpc(void *a)

-{

-	return ((ulong*)a)[-1];

-}

--- a/posix-mips/tas.s

+++ /dev/null

@@ -1,20 +1,0 @@

-#include <machine/regdef.h>

-

-.globl tas

-.ent tas 2

-

-tas:

-.set noreorder

-1:

-	ori	t1, zero, 12345	/* t1 = 12345 */

-	ll	t0, (a0)		/* t0 = *a0 */

-	sc	t1, (a0)		/* *a0 = t1 if *a0 hasn't changed; t1=success */

-	beq	t1, zero, 1b		/* repeat if *a0 did change */

-	nop

-

-	j $31				/* return */

-	or	v0, t0, zero		/* set return value on way out */

-

-.set reorder

-.end tas

-

--- a/posix-port/Makefile

+++ b/posix-port/Makefile

@@ -4,6 +4,7 @@

 OFILES=\

 	getcallerpc.$O\

+	tas.$O\

 default: $(LIB)

 $(LIB): $(OFILES)

--- a/posix-port/getcallerpc.c

+++ b/posix-port/getcallerpc.c

@@ -4,5 +4,6 @@

 uintptr

 getcallerpc(void *a)

 {

-	return 0;

+	USED(a);

+	return (uintptr)__builtin_extract_return_addr(__builtin_return_address(0));

 }

--- a/posix-power/Makefile

+++ /dev/null

@@ -1,25 +1,0 @@

-ROOT=..

-include ../Make.config

-LIB=../libmachdep.a

-

-CFLAGS+= -Wa,-mregnames

-

-OFILES=\

-	getcallerpc.$O\

-	tas.$O

-

-default: $(LIB)

-$(LIB): $(OFILES)

-	$(AR) r $(LIB) $(OFILES)

-	$(RANLIB) $(LIB)

-

-%.$O: %.c

-	$(CC) $(CFLAGS) $*.c

-

-%.$O: %.s

-	$(AS) -o $*.$O $*.s

-

-%.s: %.spp

-	cpp $*.spp >$*.s

-

-

--- a/posix-power/getcallerpc.c

+++ /dev/null

@@ -1,8 +1,0 @@

-#include "u.h"

-#include "libc.h"

-

-uintptr

-getcallerpc(void *a)

-{

-	return ((uintptr*)a)[-1];

-}

--- a/posix-power/tas.c

+++ /dev/null

@@ -1,42 +1,0 @@

-#include "u.h"

-#include "libc.h"

-

-/*

- * first argument (l) is in r3 at entry.

- * r3 contains return value upon return.

- */

-int

-tas(int *x)

-{

-	int     v;

-	/*

-	 * this __asm__ works with gcc 2.95.2 (mac os x 10.1).

-	 * this assembly language destroys r0 (0), some other register (v),

-	 * r4 (x) and r5 (temp).

-	 */

-	__asm__("\n	sync\n"

-	"	li	r0,0\n"

-	"	mr	r4,%1		/* &l->val */\n"

-	"	lis	r5,0xdead	/* assemble constant 0xdeaddead */\n"

-	"	ori	r5,r5,0xdead	/* \" */\n"

-	"tas1:\n"

-	"	dcbf	r4,r0	/* cache flush; \"fix for 603x bug\" */\n"

-	"	lwarx	%0,r4,r0	/* v = l->val with reservation */\n"

-	"	cmp	cr0,0,%0,r0	/* v == 0 */\n"

-	"	bne	tas0\n"

-	"	stwcx.	r5,r4,r0   /* if (l->val same) l->val = 0xdeaddead */\n"

-	"	bne	tas1\n"

-	"tas0:\n"

-	"	sync\n"

-	"	isync\n"

-	: "=r" (v)

-	: "r"  (x)

-	: "cc", "memory", "r0", "r4", "r5"

-	);

-	switch(v) {

-	case 0:		return 0;

-	case 0xdeaddead: return 1;

-	default:	print("tas: corrupted 0x%lux\n", v);

-	}

-	return 0;

-}

--- a/posix-ppc64le/Makefile

+++ /dev/null

@@ -1,25 +1,0 @@

-ROOT=..

-include ../Make.config

-LIB=../libmachdep.a

-

-CFLAGS+= -Wa,-mregnames

-

-OFILES=\

-	getcallerpc.$O\

-	tas.$O

-

-default: $(LIB)

-$(LIB): $(OFILES)

-	$(AR) r $(LIB) $(OFILES)

-	$(RANLIB) $(LIB)

-

-%.$O: %.c

-	$(CC) $(CFLAGS) $*.c

-

-%.$O: %.s

-	$(AS) -o $*.$O $*.s

-

-%.s: %.spp

-	cpp $*.spp >$*.s

-

-

--- a/posix-ppc64le/getcallerpc.c

+++ /dev/null

@@ -1,8 +1,0 @@

-#include "u.h"

-#include "libc.h"

-

-uintptr

-getcallerpc(void *a)

-{

-	return ((uintptr*)a)[-1];

-}

--- a/posix-ppc64le/tas.c

+++ /dev/null

@@ -1,37 +1,0 @@

-#include "u.h"

-#include "libc.h"

-

-/*

- * first argument (l) is in r3 at entry.

- * r3 contains return value upon return.

- */

-int

-tas(int *x)

-{

-	int     v;

-

-	__asm__("\n	sync\n"

-	"	li	r0,0\n"

-	"	mr	r4,%1		/* &l->val */\n"

-	"	lis	r5,0xdead	/* assemble constant 0xdeaddead */\n"

-	"	ori	r5,r5,0xdead	/* \" */\n"

-	"tas1:\n"

-	"	lwarx	%0,r4,r0	/* v = l->val with reservation */\n"

-	"	cmp	cr0,0,%0,r0	/* v == 0 */\n"

-	"	bne	tas0\n"

-	"	stwcx.	r5,r4,r0   /* if (l->val same) l->val = 0xdeaddead */\n"

-	"	bne	tas1\n"

-	"tas0:\n"

-	"	sync\n"

-	"	isync\n"

-	: "=r" (v)

-	: "r"  (x)

-	: "cc", "memory", "r0", "r4", "r5"

-	);

-	switch(v) {

-	case 0:		return 0;

-	case 0xdeaddead: return 1;

-	default:	print("tas: corrupted 0x%lux\n", v);

-	}

-	return 0;

-}

--- a/posix-riscv64/Makefile

+++ /dev/null

@@ -1,18 +1,0 @@

-ROOT=..

-include ../Make.config

-LIB=../libmachdep.a

-

-OFILES=\

-	getcallerpc.$O\

-	tas.$O

-

-default: $(LIB)

-$(LIB): $(OFILES)

-	$(AR) r $(LIB) $(OFILES)

-	$(RANLIB) $(LIB)

-

-%.$O: %.c

-	$(CC) $(CFLAGS) $*.c

-

-%.$O: %.s

-	$(AS) -o $*.$O $*.s

--- a/posix-riscv64/getcallerpc.c

+++ /dev/null

@@ -1,8 +1,0 @@

-#include "u.h"

-#include "libc.h"

-

-uintptr

-getcallerpc(void *a)

-{

-	return ((uintptr*)a)[-1];

-}

--- a/posix-riscv64/tas.c

+++ /dev/null

@@ -1,28 +1,0 @@

-#include "u.h"

-#include "libc.h"

-

-int

-tas(int *x)

-{

-	int v, i = 1;

-

-	__asm__(

-		"1:	lr.w t0, (%1)\n"

-		"	sc.w t1, %2, (%1)\n"

-		"	bnez t1, 1b\n"

-		"       mv %0, t0"

-		: "=r" (v)

-		: "r" (x), "r" (i)

-		: "t1", "t0"

-	);

-

-	switch(v) {

-	case 0:

-	case 1:

-		return v;

-	default:

-		print("canlock: corrupted 0x%lux\n", v);

-		return 1;

-	}

-}

-

--- a/posix-sun4u/Makefile

+++ /dev/null

@@ -1,24 +1,0 @@

-ROOT=..

-include ../Make.config

-LIB=../libmachdep.a

-

-OFILES=\

-	getcallerpc.$O\

-	tas.$O

-

-default: $(LIB)

-$(LIB): $(OFILES)

-	$(AR) r $(LIB) $(OFILES)

-	$(RANLIB) $(LIB)

-

-%.$O: %.c

-	$(CC) $(CFLAGS) $*.c

-

-%.$O: %.s

-	$(AS) -o $*.$O $*.s

-

-%.s: %.spp

-	cpp $*.spp >$*.s

-

-

-

--- a/posix-sun4u/getcallerpc.c

+++ /dev/null

@@ -1,9 +1,0 @@

-#include "u.h"

-#include "libc.h"

-

-uintptr

-getcallerpc(void *a)

-{

-	return ((ulong*)a)[-1];

-}

-

--- a/posix-sun4u/tas.s

+++ /dev/null

@@ -1,5 +1,0 @@

-.globl tas

-tas:

-	retl

-	ldstub [%o0], %o0

-

--- a/win32-386/Makefile

+++ /dev/null

@@ -1,23 +1,0 @@

-ROOT=..

-include ../Make.config

-LIB=../libmachdep.a

-

-OFILES=\

-	getcallerpc.$O\

-	tas.$O

-

-default: $(LIB)

-$(LIB): $(OFILES)

-	$(AR) r $(LIB) $(OFILES)

-	$(RANLIB) $(LIB)

-

-%.$O: %.c

-	$(CC) $(CFLAGS) $*.c

-

-%.$O: %.s

-	$(AS) -o $*.$O $*.s

-

-%.s: %.spp

-	cpp $*.spp >$*.s

-

-

--- a/win32-386/getcallerpc.c

+++ /dev/null

@@ -1,8 +1,0 @@

-#include "u.h"

-#include "libc.h"

-

-uintptr

-getcallerpc(void *a)

-{

-	return ((uintptr*)a)[-1];

-}

--- a/win32-386/tas.c

+++ /dev/null

@@ -1,23 +1,0 @@

-#include "u.h"

-#include "libc.h"

-

-int

-tas(int *x)

-{

-	int     v;

-

-	__asm__(	"movl   $1, %%eax\n\t"

-			"xchgl  %%eax,(%%ecx)"

-			: "=a" (v)

-			: "c" (x)

-	);

-	switch(v) {

-	case 0:

-	case 1:

-		return v;

-	default:

-		print("canlock: corrupted 0x%lux\n", v);

-		return 1;

-	}

-}

-