yann@1: Reconstructed from http://lists.arm.linux.org.uk/pipermail/linux-arm-kernel/2003-December/018647.html
yann@1: See also http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=1540
yann@1: 
yann@1: Message-ID: <DDA001.8070502@de.bosch.com>
yann@1: Subject: Help cross compiling the kernel for arm.
yann@1: From: dirk.behme at de.bosch.com
yann@1: 
yann@1: Aitor Garcia wrote:
yann@1: > Hello everybody,
yann@1: > 
yann@1: > I am having problems cross compiling the kernel for arm.
yann@1: > 
yann@1: > This is the error message I get:
yann@1: > 
yann@1: > blkpg.c: In function `blk_ioctl':
yann@1: > blkpg.c:252: error: asm-specifier for variable `__r1' conflicts with asm clobber list
yann@1: > blkpg.c:252: confused by earlier errors, bailing out make[3]: *** [blkpg.o] Error 1
yann@1: > make[3]: Leaving directory `/root/toolchain/kernel-arm/linux-2.4.21/drivers/block'
yann@1: > make[2]: *** [first_rule] Error 2
yann@1: > make[2]: Leaving directory `/root/toolchain/kernel-arm/linux-2.4.21/drivers/block'
yann@1: > make[1]: *** [_subdir_block] Error 2
yann@1: > make[1]: Leaving directory `/root/toolchain/kernel-arm/linux-2.4.21/drivers'
yann@1: > make: *** [_dir_drivers] Error 2
yann@1: > 
yann@1: > These are the toolchain versions I am using:
yann@1: >  host=i686-pc-linux-gnu
yann@1: >  binutils_version=2.14           
yann@1: >  gcc_version=3.3.2                
yann@1: >  glibc_version=2.3.2             
yann@1: >  kernel_version=2.4.21  
yann@1: > and applied the kernel patch for arm. 2.4.21-rmk1.
yann@1: > ... 
yann@1: > I have also seen references to this bug in ARM linux
yann@1: > Developer. Patch Number = 1540. But this patch is
yann@1: > classified as discarded.
yann@1: 
yann@1: You need something like 1540 to compile 2.4.21 with gcc 3.3.2. 1540 was 
yann@1: discarded because of AFLAGS change.
yann@1: 
yann@1: Try the attachment.
yann@1: 
yann@1: Dirk
yann@1: -------------- next part --------------
yann@1: --- linux/arch/arm/lib/getuser.S.orig	Mon Nov 17 07:41:51 2003
yann@1: +++ linux/arch/arm/lib/getuser.S	Mon Nov 17 07:43:16 2003
yann@1: @@ -17,7 +17,7 @@
yann@1:   *
yann@1:   * Inputs:	r0 contains the address
yann@1:   * Outputs:	r0 is the error code
yann@1: - *		r1, r2 contains the zero-extended value
yann@1: + *		r1, ip contains the zero-extended value
yann@1:   *		lr corrupted
yann@1:   *
yann@1:   * No other registers must be altered.  (see include/asm-arm/uaccess.h
yann@1: @@ -42,14 +42,14 @@ __get_user_1:
yann@1:  
yann@1:  	.global	__get_user_2
yann@1:  __get_user_2:
yann@1: -	bic	r2, sp, #0x1f00
yann@1: -	bic	r2, r2, #0x00ff
yann@1: -	ldr	r2, [r2, #TSK_ADDR_LIMIT]
yann@1: -	sub	r2, r2, #2
yann@1: -	cmp	r0, r2
yann@1: +	bic	ip, sp, #0x1f00
yann@1: +	bic	ip, ip, #0x00ff
yann@1: +	ldr	ip, [ip, #TSK_ADDR_LIMIT]
yann@1: +	sub	ip, ip, #2
yann@1: +	cmp	r0, ip
yann@1:  2:	ldrlsbt	r1, [r0], #1
yann@1: -3:	ldrlsbt	r2, [r0]
yann@1: -	orrls	r1, r1, r2, lsl #8
yann@1: +3:	ldrlsbt	ip, [r0]
yann@1: +	orrls	r1, r1, ip, lsl #8
yann@1:  	movls	r0, #0
yann@1:  	movls	pc, lr
yann@1:  	b	__get_user_bad
yann@1: @@ -68,20 +68,20 @@ __get_user_4:
yann@1:  
yann@1:  	.global	__get_user_8
yann@1:  __get_user_8:
yann@1: -	bic	r2, sp, #0x1f00
yann@1: -	bic	r2, r2, #0x00ff
yann@1: -	ldr	r2, [r2, #TSK_ADDR_LIMIT]
yann@1: -	sub	r2, r2, #8
yann@1: -	cmp	r0, r2
yann@1: +	bic	ip, sp, #0x1f00
yann@1: +	bic	ip, ip, #0x00ff
yann@1: +	ldr	ip, [ip, #TSK_ADDR_LIMIT]
yann@1: +	sub	ip, ip, #8
yann@1: +	cmp	r0, ip
yann@1:  5:	ldrlst	r1, [r0], #4
yann@1: -6:	ldrlst	r2, [r0]
yann@1: +6:	ldrlst	ip, [r0]
yann@1:  	movls	r0, #0
yann@1:  	movls	pc, lr
yann@1:  
yann@1:  	/* fall through */
yann@1:  
yann@1:  __get_user_bad_8:
yann@1: -	mov	r2, #0
yann@1: +	mov	ip, #0
yann@1:  __get_user_bad:
yann@1:  	mov	r1, #0
yann@1:  	mov	r0, #-14
yann@1: --- linux/arch/arm/lib/putuser.S.orig	Mon Nov 17 07:41:57 2003
yann@1: +++ linux/arch/arm/lib/putuser.S	Mon Nov 17 07:42:26 2003
yann@1: @@ -16,7 +16,7 @@
yann@1:   * __put_user_X
yann@1:   *
yann@1:   * Inputs:	r0 contains the address
yann@1: - *		r1, r2 contains the value
yann@1: + *		r1, ip contains the value
yann@1:   * Outputs:	r0 is the error code
yann@1:   *		lr corrupted
yann@1:   *
yann@1: @@ -30,11 +30,11 @@
yann@1:  
yann@1:  	.global	__put_user_1
yann@1:  __put_user_1:
yann@1: -	bic	r2, sp, #0x1f00
yann@1: -	bic	r2, r2, #0x00ff
yann@1: -	ldr	r2, [r2, #TSK_ADDR_LIMIT]
yann@1: -	sub	r2, r2, #1
yann@1: -	cmp	r0, r2
yann@1: +	bic	ip, sp, #0x1f00
yann@1: +	bic	ip, ip, #0x00ff
yann@1: +	ldr	ip, [ip, #TSK_ADDR_LIMIT]
yann@1: +	sub	ip, ip, #1
yann@1: +	cmp	r0, ip
yann@1:  1:	strlsbt	r1, [r0]
yann@1:  	movls	r0, #0
yann@1:  	movls	pc, lr
yann@1: @@ -42,11 +42,11 @@ __put_user_1:
yann@1:  
yann@1:  	.global	__put_user_2
yann@1:  __put_user_2:
yann@1: -	bic	r2, sp, #0x1f00
yann@1: -	bic	r2, r2, #0x00ff
yann@1: -	ldr	r2, [r2, #TSK_ADDR_LIMIT]
yann@1: -	sub	r2, r2, #2
yann@1: -	cmp	r0, r2
yann@1: +	bic	ip, sp, #0x1f00
yann@1: +	bic	ip, ip, #0x00ff
yann@1: +	ldr	ip, [ip, #TSK_ADDR_LIMIT]
yann@1: +	sub	ip, ip, #2
yann@1: +	cmp	r0, ip
yann@1:  2:	strlsbt	r1, [r0], #1
yann@1:  	movls	r1, r1, lsr #8
yann@1:  3:	strlsbt	r1, [r0]
yann@1: @@ -56,11 +56,11 @@ __put_user_2:
yann@1:  
yann@1:  	.global	__put_user_4
yann@1:  __put_user_4:
yann@1: -	bic	r2, sp, #0x1f00
yann@1: -	bic	r2, r2, #0x00ff
yann@1: -	ldr	r2, [r2, #TSK_ADDR_LIMIT]
yann@1: -	sub	r2, r2, #4
yann@1: -	cmp	r0, r2
yann@1: +	bic	ip, sp, #0x1f00
yann@1: +	bic	ip, ip, #0x00ff
yann@1: +	ldr	ip, [ip, #TSK_ADDR_LIMIT]
yann@1: +	sub	ip, ip, #4
yann@1: +	cmp	r0, ip
yann@1:  4:	strlst	r1, [r0]
yann@1:  	movls	r0, #0
yann@1:  	movls	pc, lr
yann@1: @@ -74,7 +74,7 @@ __put_user_8:
yann@1:  	sub	ip, ip, #8
yann@1:  	cmp	r0, ip
yann@1:  5:	strlst	r1, [r0], #4
yann@1: -6:	strlst	r2, [r0]
yann@1: +6:	strlst	ip, [r0]
yann@1:  	movls	r0, #0
yann@1:  	movls	pc, lr
yann@1:  
yann@1: --- linux/include/asm-arm/uaccess.h.orig	Mon Nov 17 07:41:04 2003
yann@1: +++ linux/include/asm-arm/uaccess.h	Mon Nov 17 07:41:37 2003
yann@1: @@ -86,7 +86,7 @@ extern int __get_user_bad(void);
yann@1:  			__get_user_x(__r1, __p, __e, 1, "lr");		\
yann@1:  	       		break;						\
yann@1:  		case 2:							\
yann@1: -			__get_user_x(__r1, __p, __e, 2, "r2", "lr");	\
yann@1: +			__get_user_x(__r1, __p, __e, 2, "ip", "lr");	\
yann@1:  			break;						\
yann@1:  		case 4:							\
yann@1:  	       		__get_user_x(__r1, __p, __e, 4, "lr");		\
yann@1: @@ -122,13 +122,13 @@ extern int __put_user_bad(void);
yann@1:  		register int __e asm("r0");				\
yann@1:  		switch (sizeof(*(p))) {					\
yann@1:  		case 1:							\
yann@1: -			__put_user_x(__r1, __p, __e, 1, "r2", "lr");	\
yann@1: +			__put_user_x(__r1, __p, __e, 1, "ip", "lr");	\
yann@1:  			break;						\
yann@1:  		case 2:							\
yann@1: -			__put_user_x(__r1, __p, __e, 2, "r2", "lr");	\
yann@1: +			__put_user_x(__r1, __p, __e, 2, "ip", "lr");	\
yann@1:  			break;						\
yann@1:  		case 4:							\
yann@1: -			__put_user_x(__r1, __p, __e, 4, "r2", "lr");	\
yann@1: +			__put_user_x(__r1, __p, __e, 4, "ip", "lr");	\
yann@1:  			break;						\
yann@1:  		case 8:							\
yann@1:  			__put_user_x(__r1, __p, __e, 8, "ip", "lr");	\