Reconstructed from http://lists.arm.linux.org.uk/pipermail/linux-arm-kernel/2003-December/018647.html

See also http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=1540

Message-ID: <DDA001.8070502@de.bosch.com>

Subject: Help cross compiling the kernel for arm.

From: dirk.behme at de.bosch.com

Aitor Garcia wrote:

> Hello everybody,

> 

> I am having problems cross compiling the kernel for arm.

> 

> This is the error message I get:

> 

> blkpg.c: In function `blk_ioctl':

> blkpg.c:252: error: asm-specifier for variable `__r1' conflicts with asm clobber list

> blkpg.c:252: confused by earlier errors, bailing out make[3]: *** [blkpg.o] Error 1

> make[3]: Leaving directory `/root/toolchain/kernel-arm/linux-2.4.21/drivers/block'

> make[2]: *** [first_rule] Error 2

> make[2]: Leaving directory `/root/toolchain/kernel-arm/linux-2.4.21/drivers/block'

> make[1]: *** [_subdir_block] Error 2

> make[1]: Leaving directory `/root/toolchain/kernel-arm/linux-2.4.21/drivers'

> make: *** [_dir_drivers] Error 2

> 

> These are the toolchain versions I am using:

>  host=i686-pc-linux-gnu

>  binutils_version=2.14           

>  gcc_version=3.3.2                

>  glibc_version=2.3.2             

>  kernel_version=2.4.21  

> and applied the kernel patch for arm. 2.4.21-rmk1.

> ... 

> I have also seen references to this bug in ARM linux

> Developer. Patch Number = 1540. But this patch is

> classified as discarded.

You need something like 1540 to compile 2.4.21 with gcc 3.3.2. 1540 was 

discarded because of AFLAGS change.

Try the attachment.

Dirk

-------------- next part --------------

--- linux/arch/arm/lib/getuser.S.orig	Mon Nov 17 07:41:51 2003

+++ linux/arch/arm/lib/getuser.S	Mon Nov 17 07:43:16 2003

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

  *

  * Inputs:	r0 contains the address

  * Outputs:	r0 is the error code

- *		r1, r2 contains the zero-extended value

+ *		r1, ip contains the zero-extended value

  *		lr corrupted

  *

  * No other registers must be altered.  (see include/asm-arm/uaccess.h

@@ -42,14 +42,14 @@ __get_user_1:

 	.global	__get_user_2

 __get_user_2:

-	bic	r2, sp, #0x1f00

-	bic	r2, r2, #0x00ff

-	ldr	r2, [r2, #TSK_ADDR_LIMIT]

-	sub	r2, r2, #2

-	cmp	r0, r2

+	bic	ip, sp, #0x1f00

+	bic	ip, ip, #0x00ff

+	ldr	ip, [ip, #TSK_ADDR_LIMIT]

+	sub	ip, ip, #2

+	cmp	r0, ip

 2:	ldrlsbt	r1, [r0], #1

-3:	ldrlsbt	r2, [r0]

-	orrls	r1, r1, r2, lsl #8

+3:	ldrlsbt	ip, [r0]

+	orrls	r1, r1, ip, lsl #8

 	movls	r0, #0

 	movls	pc, lr

 	b	__get_user_bad

@@ -68,20 +68,20 @@ __get_user_4:

 	.global	__get_user_8

 __get_user_8:

-	bic	r2, sp, #0x1f00

-	bic	r2, r2, #0x00ff

-	ldr	r2, [r2, #TSK_ADDR_LIMIT]

-	sub	r2, r2, #8

-	cmp	r0, r2

+	bic	ip, sp, #0x1f00

+	bic	ip, ip, #0x00ff

+	ldr	ip, [ip, #TSK_ADDR_LIMIT]

+	sub	ip, ip, #8

+	cmp	r0, ip

 5:	ldrlst	r1, [r0], #4

-6:	ldrlst	r2, [r0]

+6:	ldrlst	ip, [r0]

 	movls	r0, #0

 	movls	pc, lr

 	/* fall through */

 __get_user_bad_8:

-	mov	r2, #0

+	mov	ip, #0

 __get_user_bad:

 	mov	r1, #0

 	mov	r0, #-14

--- linux/arch/arm/lib/putuser.S.orig	Mon Nov 17 07:41:57 2003

+++ linux/arch/arm/lib/putuser.S	Mon Nov 17 07:42:26 2003

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

  * __put_user_X

  *

  * Inputs:	r0 contains the address

- *		r1, r2 contains the value

+ *		r1, ip contains the value

  * Outputs:	r0 is the error code

  *		lr corrupted

  *

@@ -30,11 +30,11 @@

 	.global	__put_user_1

 __put_user_1:

-	bic	r2, sp, #0x1f00

-	bic	r2, r2, #0x00ff

-	ldr	r2, [r2, #TSK_ADDR_LIMIT]

-	sub	r2, r2, #1

-	cmp	r0, r2

+	bic	ip, sp, #0x1f00

+	bic	ip, ip, #0x00ff

+	ldr	ip, [ip, #TSK_ADDR_LIMIT]

+	sub	ip, ip, #1

+	cmp	r0, ip

 1:	strlsbt	r1, [r0]

 	movls	r0, #0

 	movls	pc, lr

@@ -42,11 +42,11 @@ __put_user_1:

 	.global	__put_user_2

 __put_user_2:

-	bic	r2, sp, #0x1f00

-	bic	r2, r2, #0x00ff

-	ldr	r2, [r2, #TSK_ADDR_LIMIT]

-	sub	r2, r2, #2

-	cmp	r0, r2

+	bic	ip, sp, #0x1f00

+	bic	ip, ip, #0x00ff

+	ldr	ip, [ip, #TSK_ADDR_LIMIT]

+	sub	ip, ip, #2

+	cmp	r0, ip

 2:	strlsbt	r1, [r0], #1

 	movls	r1, r1, lsr #8

 3:	strlsbt	r1, [r0]

@@ -56,11 +56,11 @@ __put_user_2:

 	.global	__put_user_4

 __put_user_4:

-	bic	r2, sp, #0x1f00

-	bic	r2, r2, #0x00ff

-	ldr	r2, [r2, #TSK_ADDR_LIMIT]

-	sub	r2, r2, #4

-	cmp	r0, r2

+	bic	ip, sp, #0x1f00

+	bic	ip, ip, #0x00ff

+	ldr	ip, [ip, #TSK_ADDR_LIMIT]

+	sub	ip, ip, #4

+	cmp	r0, ip

 4:	strlst	r1, [r0]

 	movls	r0, #0

 	movls	pc, lr

@@ -74,7 +74,7 @@ __put_user_8:

 	sub	ip, ip, #8

 	cmp	r0, ip

 5:	strlst	r1, [r0], #4

-6:	strlst	r2, [r0]

+6:	strlst	ip, [r0]

 	movls	r0, #0

 	movls	pc, lr

--- linux/include/asm-arm/uaccess.h.orig	Mon Nov 17 07:41:04 2003

+++ linux/include/asm-arm/uaccess.h	Mon Nov 17 07:41:37 2003

@@ -86,7 +86,7 @@ extern int __get_user_bad(void);

 			__get_user_x(__r1, __p, __e, 1, "lr");		\

 	       		break;						\

 		case 2:							\

-			__get_user_x(__r1, __p, __e, 2, "r2", "lr");	\

+			__get_user_x(__r1, __p, __e, 2, "ip", "lr");	\

 			break;						\

 		case 4:							\

 	       		__get_user_x(__r1, __p, __e, 4, "lr");		\

@@ -122,13 +122,13 @@ extern int __put_user_bad(void);

 		register int __e asm("r0");				\

 		switch (sizeof(*(p))) {					\

 		case 1:							\

-			__put_user_x(__r1, __p, __e, 1, "r2", "lr");	\

+			__put_user_x(__r1, __p, __e, 1, "ip", "lr");	\

 			break;						\

 		case 2:							\

-			__put_user_x(__r1, __p, __e, 2, "r2", "lr");	\

+			__put_user_x(__r1, __p, __e, 2, "ip", "lr");	\

 			break;						\

 		case 4:							\

-			__put_user_x(__r1, __p, __e, 4, "r2", "lr");	\

+			__put_user_x(__r1, __p, __e, 4, "ip", "lr");	\

 			break;						\

 		case 8:							\

 			__put_user_x(__r1, __p, __e, 8, "ip", "lr");	\