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| author | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2013-05-19 01:48:15 +0000 | 
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2013-05-30 20:24:38 +0200 | 
| commit | 3da0e5750b24a9491058df6126c7be577a276c09 (patch) | |
| tree | b5ef57cd027b046a292841f15e8c683077ba5b61 | |
| parent | fa6c7413d1d5256516aad30b97eba3e4094c7ea3 (diff) | |
| download | olio-uboot-2014.01-3da0e5750b24a9491058df6126c7be577a276c09.tar.xz olio-uboot-2014.01-3da0e5750b24a9491058df6126c7be577a276c09.zip | |
arm: factorize relocate_code routine
Replace all relocate_code routines from ARM start.S files
with a single instance in file arch/arm/lib/relocate.S.
For PXA, this requires moving the dcache unlocking code
from within relocate_code into c_runtime_cpu_setup.
Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
Reviewed-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Tested-by: Simon Glass <sjg@chromium.org>
| -rw-r--r-- | arch/arm/cpu/arm1136/start.S | 76 | ||||
| -rw-r--r-- | arch/arm/cpu/arm1176/start.S | 76 | ||||
| -rw-r--r-- | arch/arm/cpu/arm720t/start.S | 76 | ||||
| -rw-r--r-- | arch/arm/cpu/arm920t/start.S | 75 | ||||
| -rw-r--r-- | arch/arm/cpu/arm925t/start.S | 76 | ||||
| -rw-r--r-- | arch/arm/cpu/arm926ejs/start.S | 76 | ||||
| -rw-r--r-- | arch/arm/cpu/arm946es/start.S | 76 | ||||
| -rw-r--r-- | arch/arm/cpu/arm_intcm/start.S | 76 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/start.S | 76 | ||||
| -rw-r--r-- | arch/arm/cpu/ixp/start.S | 76 | ||||
| -rw-r--r-- | arch/arm/cpu/pxa/start.S | 92 | ||||
| -rw-r--r-- | arch/arm/cpu/s3c44b0/start.S | 76 | ||||
| -rw-r--r-- | arch/arm/cpu/sa1100/start.S | 76 | ||||
| -rw-r--r-- | arch/arm/lib/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/lib/relocate.S | 112 | 
15 files changed, 124 insertions, 992 deletions
| diff --git a/arch/arm/cpu/arm1136/start.S b/arch/arm/cpu/arm1136/start.S index 1eec2e0b6..edf249d90 100644 --- a/arch/arm/cpu/arm1136/start.S +++ b/arch/arm/cpu/arm1136/start.S @@ -169,82 +169,6 @@ next:  /*------------------------------------------------------------------------------*/ -#ifndef CONFIG_SPL_BUILD -/* - * void relocate_code(addr_moni) - * - * This function relocates the monitor code. - */ -	.globl	relocate_code -relocate_code: -	mov	r6, r0	/* save addr of destination */ - -	adr	r0, _start -	subs	r9, r6, r0		/* r9 <- relocation offset */ -	beq	relocate_done		/* skip relocation */ -	mov	r1, r6			/* r1 <- scratch for copy_loop */ -	ldr	r3, _image_copy_end_ofs -	add	r2, r0, r3		/* r2 <- source end address	    */ - -copy_loop: -	ldmia	r0!, {r10-r11}		/* copy from source address [r0]    */ -	stmia	r1!, {r10-r11}		/* copy to   target address [r1]    */ -	cmp	r0, r2			/* until source end address [r2]    */ -	blo	copy_loop - -	/* -	 * fix .rel.dyn relocations -	 */ -	ldr	r0, _TEXT_BASE		/* r0 <- Text base */ -	ldr	r10, _dynsym_start_ofs	/* r10 <- sym table ofs */ -	add	r10, r10, r0		/* r10 <- sym table in FLASH */ -	ldr	r2, _rel_dyn_start_ofs	/* r2 <- rel dyn start ofs */ -	add	r2, r2, r0		/* r2 <- rel dyn start in FLASH */ -	ldr	r3, _rel_dyn_end_ofs	/* r3 <- rel dyn end ofs */ -	add	r3, r3, r0		/* r3 <- rel dyn end in FLASH */ -fixloop: -	ldr	r0, [r2]		/* r0 <- location to fix up, IN FLASH! */ -	add	r0, r0, r9		/* r0 <- location to fix up in RAM */ -	ldr	r1, [r2, #4] -	and	r7, r1, #0xff -	cmp	r7, #23			/* relative fixup? */ -	beq	fixrel -	cmp	r7, #2			/* absolute fixup? */ -	beq	fixabs -	/* ignore unknown type of fixup */ -	b	fixnext -fixabs: -	/* absolute fix: set location to (offset) symbol value */ -	mov	r1, r1, LSR #4		/* r1 <- symbol index in .dynsym */ -	add	r1, r10, r1		/* r1 <- address of symbol in table */ -	ldr	r1, [r1, #4]		/* r1 <- symbol value */ -	add	r1, r1, r9		/* r1 <- relocated sym addr */ -	b	fixnext -fixrel: -	/* relative fix: increase location by offset */ -	ldr	r1, [r0] -	add	r1, r1, r9 -fixnext: -	str	r1, [r0] -	add	r2, r2, #8		/* each rel.dyn entry is 8 bytes */ -	cmp	r2, r3 -	blo	fixloop - -relocate_done: - -	bx	lr - -_image_copy_end_ofs: -	.word __image_copy_end - _start -_rel_dyn_start_ofs: -	.word __rel_dyn_start - _start -_rel_dyn_end_ofs: -	.word __rel_dyn_end - _start -_dynsym_start_ofs: -	.word __dynsym_start - _start - -#endif -  	.globl	c_runtime_cpu_setup  c_runtime_cpu_setup: diff --git a/arch/arm/cpu/arm1176/start.S b/arch/arm/cpu/arm1176/start.S index 3c2a52c9f..65292bcf8 100644 --- a/arch/arm/cpu/arm1176/start.S +++ b/arch/arm/cpu/arm1176/start.S @@ -221,82 +221,6 @@ skip_tcmdisable:  /*------------------------------------------------------------------------------*/ -#ifndef CONFIG_SPL_BUILD -/* - * void relocate_code(addr_moni) - * - * This function relocates the monitor code. - */ -	.globl	relocate_code -relocate_code: -	mov	r6, r0	/* save addr of destination */ - -	adr	r0, _start -	subs	r9, r6, r0		/* r9 <- relocation offset */ -	beq	relocate_done		/* skip relocation */ -	mov	r1, r6			/* r1 <- scratch for copy_loop */ -	ldr	r3, _image_copy_end_ofs -	add	r2, r0, r3		/* r2 <- source end address	    */ - -copy_loop: -	ldmia	r0!, {r10-r11}		/* copy from source address [r0]    */ -	stmia	r1!, {r10-r11}		/* copy to   target address [r1]    */ -	cmp	r0, r2			/* until source end address [r2]    */ -	blo	copy_loop - -	/* -	 * fix .rel.dyn relocations -	 */ -	ldr	r0, _TEXT_BASE		/* r0 <- Text base */ -	ldr	r10, _dynsym_start_ofs	/* r10 <- sym table ofs */ -	add	r10, r10, r0		/* r10 <- sym table in FLASH */ -	ldr	r2, _rel_dyn_start_ofs	/* r2 <- rel dyn start ofs */ -	add	r2, r2, r0		/* r2 <- rel dyn start in FLASH */ -	ldr	r3, _rel_dyn_end_ofs	/* r3 <- rel dyn end ofs */ -	add	r3, r3, r0		/* r3 <- rel dyn end in FLASH */ -fixloop: -	ldr	r0, [r2]		/* r0 <- location to fix up, IN FLASH! */ -	add	r0, r0, r9		/* r0 <- location to fix up in RAM */ -	ldr	r1, [r2, #4] -	and	r7, r1, #0xff -	cmp	r7, #23			/* relative fixup? */ -	beq	fixrel -	cmp	r7, #2			/* absolute fixup? */ -	beq	fixabs -	/* ignore unknown type of fixup */ -	b	fixnext -fixabs: -	/* absolute fix: set location to (offset) symbol value */ -	mov	r1, r1, LSR #4		/* r1 <- symbol index in .dynsym */ -	add	r1, r10, r1		/* r1 <- address of symbol in table */ -	ldr	r1, [r1, #4]		/* r1 <- symbol value */ -	add	r1, r1, r9		/* r1 <- relocated sym addr */ -	b	fixnext -fixrel: -	/* relative fix: increase location by offset */ -	ldr	r1, [r0] -	add	r1, r1, r9 -fixnext: -	str	r1, [r0] -	add	r2, r2, #8		/* each rel.dyn entry is 8 bytes */ -	cmp	r2, r3 -	blo	fixloop - -relocate_done: - -	bx	lr - -_image_copy_end_ofs: -	.word __image_copy_end - _start -_rel_dyn_start_ofs: -	.word __rel_dyn_start - _start -_rel_dyn_end_ofs: -	.word __rel_dyn_end - _start -_dynsym_start_ofs: -	.word __dynsym_start - _start - -#endif -  	.globl	c_runtime_cpu_setup  c_runtime_cpu_setup: diff --git a/arch/arm/cpu/arm720t/start.S b/arch/arm/cpu/arm720t/start.S index a4e23b12c..a396ebcb7 100644 --- a/arch/arm/cpu/arm720t/start.S +++ b/arch/arm/cpu/arm720t/start.S @@ -151,82 +151,6 @@ reset:  /*------------------------------------------------------------------------------*/ -#ifndef CONFIG_SPL_BUILD -/* - * void relocate_code(addr_moni) - * - * This function relocates the monitor code. - */ -	.globl	relocate_code -relocate_code: -	mov	r6, r0	/* save addr of destination */ - -	adr	r0, _start -	subs	r9, r6, r0		/* r9 <- relocation offset */ -	beq	relocate_done		/* skip relocation */ -	mov	r1, r6			/* r1 <- scratch for copy_loop */ -	ldr	r3, _image_copy_end_ofs -	add	r2, r0, r3		/* r2 <- source end address	    */ - -copy_loop: -	ldmia	r0!, {r10-r11}		/* copy from source address [r0]    */ -	stmia	r1!, {r10-r11}		/* copy to   target address [r1]    */ -	cmp	r0, r2			/* until source end address [r2]    */ -	blo	copy_loop - -	/* -	 * fix .rel.dyn relocations -	 */ -	ldr	r0, _TEXT_BASE		/* r0 <- Text base */ -	ldr	r10, _dynsym_start_ofs	/* r10 <- sym table ofs */ -	add	r10, r10, r0		/* r10 <- sym table in FLASH */ -	ldr	r2, _rel_dyn_start_ofs	/* r2 <- rel dyn start ofs */ -	add	r2, r2, r0		/* r2 <- rel dyn start in FLASH */ -	ldr	r3, _rel_dyn_end_ofs	/* r3 <- rel dyn end ofs */ -	add	r3, r3, r0		/* r3 <- rel dyn end in FLASH */ -fixloop: -	ldr	r0, [r2]		/* r0 <- location to fix up, IN FLASH! */ -	add	r0, r0, r9		/* r0 <- location to fix up in RAM */ -	ldr	r1, [r2, #4] -	and	r7, r1, #0xff -	cmp	r7, #23			/* relative fixup? */ -	beq	fixrel -	cmp	r7, #2			/* absolute fixup? */ -	beq	fixabs -	/* ignore unknown type of fixup */ -	b	fixnext -fixabs: -	/* absolute fix: set location to (offset) symbol value */ -	mov	r1, r1, LSR #4		/* r1 <- symbol index in .dynsym */ -	add	r1, r10, r1		/* r1 <- address of symbol in table */ -	ldr	r1, [r1, #4]		/* r1 <- symbol value */ -	add	r1, r1, r9		/* r1 <- relocated sym addr */ -	b	fixnext -fixrel: -	/* relative fix: increase location by offset */ -	ldr	r1, [r0] -	add	r1, r1, r9 -fixnext: -	str	r1, [r0] -	add	r2, r2, #8		/* each rel.dyn entry is 8 bytes */ -	cmp	r2, r3 -	blo	fixloop - -relocate_done: - -	mov	pc, lr - -_image_copy_end_ofs: -	.word __image_copy_end - _start -_rel_dyn_start_ofs: -	.word __rel_dyn_start - _start -_rel_dyn_end_ofs: -	.word __rel_dyn_end - _start -_dynsym_start_ofs: -	.word __dynsym_start - _start - -#endif -  	.globl	c_runtime_cpu_setup  c_runtime_cpu_setup: diff --git a/arch/arm/cpu/arm920t/start.S b/arch/arm/cpu/arm920t/start.S index 889329fa5..323206512 100644 --- a/arch/arm/cpu/arm920t/start.S +++ b/arch/arm/cpu/arm920t/start.S @@ -190,81 +190,6 @@ copyex:  /*------------------------------------------------------------------------------*/ -#ifndef CONFIG_SPL_BUILD -/* - * void relocate_code(addr_moni) - * - * This function relocates the monitor code. - */ -	.globl	relocate_code -relocate_code: -	mov	r6, r0	/* save addr of destination */ - -	adr	r0, _start -	subs	r9, r6, r0		/* r9 <- relocation offset */ -	beq	relocate_done		/* skip relocation */ -	mov	r1, r6			/* r1 <- scratch for copy_loop */ -	ldr	r3, _image_copy_end_ofs -	add	r2, r0, r3		/* r2 <- source end address	    */ - -copy_loop: -	ldmia	r0!, {r10-r11}		/* copy from source address [r0]    */ -	stmia	r1!, {r10-r11}		/* copy to   target address [r1]    */ -	cmp	r0, r2			/* until source end address [r2]    */ -	blo	copy_loop - -	/* -	 * fix .rel.dyn relocations -	 */ -	ldr	r0, _TEXT_BASE		/* r0 <- Text base */ -	ldr	r10, _dynsym_start_ofs	/* r10 <- sym table ofs */ -	add	r10, r10, r0		/* r10 <- sym table in FLASH */ -	ldr	r2, _rel_dyn_start_ofs	/* r2 <- rel dyn start ofs */ -	add	r2, r2, r0		/* r2 <- rel dyn start in FLASH */ -	ldr	r3, _rel_dyn_end_ofs	/* r3 <- rel dyn end ofs */ -	add	r3, r3, r0		/* r3 <- rel dyn end in FLASH */ -fixloop: -	ldr	r0, [r2]		/* r0 <- location to fix up, IN FLASH! */ -	add	r0, r0, r9		/* r0 <- location to fix up in RAM */ -	ldr	r1, [r2, #4] -	and	r7, r1, #0xff -	cmp	r7, #23			/* relative fixup? */ -	beq	fixrel -	cmp	r7, #2			/* absolute fixup? */ -	beq	fixabs -	/* ignore unknown type of fixup */ -	b	fixnext -fixabs: -	/* absolute fix: set location to (offset) symbol value */ -	mov	r1, r1, LSR #4		/* r1 <- symbol index in .dynsym */ -	add	r1, r10, r1		/* r1 <- address of symbol in table */ -	ldr	r1, [r1, #4]		/* r1 <- symbol value */ -	add	r1, r1, r9		/* r1 <- relocated sym addr */ -	b	fixnext -fixrel: -	/* relative fix: increase location by offset */ -	ldr	r1, [r0] -	add	r1, r1, r9 -fixnext: -	str	r1, [r0] -	add	r2, r2, #8		/* each rel.dyn entry is 8 bytes */ -	cmp	r2, r3 -	blo	fixloop -relocate_done: - -	mov	pc, lr - -_image_copy_end_ofs: -	.word __image_copy_end - _start -_rel_dyn_start_ofs: -	.word __rel_dyn_start - _start -_rel_dyn_end_ofs: -	.word __rel_dyn_end - _start -_dynsym_start_ofs: -	.word __dynsym_start - _start - -#endif -  	.globl	c_runtime_cpu_setup  c_runtime_cpu_setup: diff --git a/arch/arm/cpu/arm925t/start.S b/arch/arm/cpu/arm925t/start.S index 64e8ae5b7..97eb276b5 100644 --- a/arch/arm/cpu/arm925t/start.S +++ b/arch/arm/cpu/arm925t/start.S @@ -180,82 +180,6 @@ poll1:  /*------------------------------------------------------------------------------*/ -#ifndef CONFIG_SPL_BUILD -/* - * void relocate_code(addr_moni) - * - * This function relocates the monitor code. - */ -	.globl	relocate_code -relocate_code: -	mov	r6, r0	/* save addr of destination */ - -	adr	r0, _start -	subs	r9, r6, r0		/* r9 <- relocation offset */ -	beq	relocate_done		/* skip relocation */ -	mov	r1, r6			/* r1 <- scratch for copy_loop */ -	ldr	r3, _image_copy_end_ofs -	add	r2, r0, r3		/* r2 <- source end address	    */ - -copy_loop: -	ldmia	r0!, {r10-r11}		/* copy from source address [r0]    */ -	stmia	r1!, {r10-r11}		/* copy to   target address [r1]    */ -	cmp	r0, r2			/* until source end address [r2]    */ -	blo	copy_loop - -	/* -	 * fix .rel.dyn relocations -	 */ -	ldr	r0, _TEXT_BASE		/* r0 <- Text base */ -	ldr	r10, _dynsym_start_ofs	/* r10 <- sym table ofs */ -	add	r10, r10, r0		/* r10 <- sym table in FLASH */ -	ldr	r2, _rel_dyn_start_ofs	/* r2 <- rel dyn start ofs */ -	add	r2, r2, r0		/* r2 <- rel dyn start in FLASH */ -	ldr	r3, _rel_dyn_end_ofs	/* r3 <- rel dyn end ofs */ -	add	r3, r3, r0		/* r3 <- rel dyn end in FLASH */ -fixloop: -	ldr	r0, [r2]		/* r0 <- location to fix up, IN FLASH! */ -	add	r0, r0, r9		/* r0 <- location to fix up in RAM */ -	ldr	r1, [r2, #4] -	and	r7, r1, #0xff -	cmp	r7, #23			/* relative fixup? */ -	beq	fixrel -	cmp	r7, #2			/* absolute fixup? */ -	beq	fixabs -	/* ignore unknown type of fixup */ -	b	fixnext -fixabs: -	/* absolute fix: set location to (offset) symbol value */ -	mov	r1, r1, LSR #4		/* r1 <- symbol index in .dynsym */ -	add	r1, r10, r1		/* r1 <- address of symbol in table */ -	ldr	r1, [r1, #4]		/* r1 <- symbol value */ -	add	r1, r1, r9		/* r1 <- relocated sym addr */ -	b	fixnext -fixrel: -	/* relative fix: increase location by offset */ -	ldr	r1, [r0] -	add	r1, r1, r9 -fixnext: -	str	r1, [r0] -	add	r2, r2, #8		/* each rel.dyn entry is 8 bytes */ -	cmp	r2, r3 -	blo	fixloop - -relocate_done: - -	mov	pc, lr - -_image_copy_end_ofs: -	.word __image_copy_end - _start -_rel_dyn_start_ofs: -	.word __rel_dyn_start - _start -_rel_dyn_end_ofs: -	.word __rel_dyn_end - _start -_dynsym_start_ofs: -	.word __dynsym_start - _start - -#endif -  	.globl	c_runtime_cpu_setup  c_runtime_cpu_setup: diff --git a/arch/arm/cpu/arm926ejs/start.S b/arch/arm/cpu/arm926ejs/start.S index d5c4ab21c..5fc8e0459 100644 --- a/arch/arm/cpu/arm926ejs/start.S +++ b/arch/arm/cpu/arm926ejs/start.S @@ -186,82 +186,6 @@ reset:  /*------------------------------------------------------------------------------*/ -#ifndef CONFIG_SPL_BUILD -/* - * void relocate_code(addr_moni) - * - * This function relocates the monitor code. - */ -	.globl	relocate_code -relocate_code: -	mov	r6, r0	/* save addr of destination */ - -	adr	r0, _start -	subs	r9, r6, r0		/* r9 <- relocation offset */ -	beq	relocate_done		/* skip relocation */ -	mov	r1, r6			/* r1 <- scratch for copy loop */ -	ldr	r3, _image_copy_end_ofs -	add	r2, r0, r3		/* r2 <- source end address	    */ - -copy_loop: -	ldmia	r0!, {r10-r11}		/* copy from source address [r0]    */ -	stmia	r1!, {r10-r11}		/* copy to   target address [r1]    */ -	cmp	r0, r2			/* until source end address [r2]    */ -	blo	copy_loop - -	/* -	 * fix .rel.dyn relocations -	 */ -	ldr	r0, _TEXT_BASE		/* r0 <- Text base */ -	ldr	r10, _dynsym_start_ofs	/* r10 <- sym table ofs */ -	add	r10, r10, r0		/* r10 <- sym table in FLASH */ -	ldr	r2, _rel_dyn_start_ofs	/* r2 <- rel dyn start ofs */ -	add	r2, r2, r0		/* r2 <- rel dyn start in FLASH */ -	ldr	r3, _rel_dyn_end_ofs	/* r3 <- rel dyn end ofs */ -	add	r3, r3, r0		/* r3 <- rel dyn end in FLASH */ -fixloop: -	ldr	r0, [r2]		/* r0 <- location to fix up, IN FLASH! */ -	add	r0, r0, r9		/* r0 <- location to fix up in RAM */ -	ldr	r1, [r2, #4] -	and	r7, r1, #0xff -	cmp	r7, #23			/* relative fixup? */ -	beq	fixrel -	cmp	r7, #2			/* absolute fixup? */ -	beq	fixabs -	/* ignore unknown type of fixup */ -	b	fixnext -fixabs: -	/* absolute fix: set location to (offset) symbol value */ -	mov	r1, r1, LSR #4		/* r1 <- symbol index in .dynsym */ -	add	r1, r10, r1		/* r1 <- address of symbol in table */ -	ldr	r1, [r1, #4]		/* r1 <- symbol value */ -	add	r1, r1, r9		/* r1 <- relocated sym addr */ -	b	fixnext -fixrel: -	/* relative fix: increase location by offset */ -	ldr	r1, [r0] -	add	r1, r1, r9 -fixnext: -	str	r1, [r0] -	add	r2, r2, #8		/* each rel.dyn entry is 8 bytes */ -	cmp	r2, r3 -	blo	fixloop - -relocate_done: - -	bx	lr - -_image_copy_end_ofs: -	.word __image_copy_end - _start -_rel_dyn_start_ofs: -	.word __rel_dyn_start - _start -_rel_dyn_end_ofs: -	.word __rel_dyn_end - _start -_dynsym_start_ofs: -	.word __dynsym_start - _start - -#endif -  	.globl	c_runtime_cpu_setup  c_runtime_cpu_setup: diff --git a/arch/arm/cpu/arm946es/start.S b/arch/arm/cpu/arm946es/start.S index 2fc730cee..e9d0c34c9 100644 --- a/arch/arm/cpu/arm946es/start.S +++ b/arch/arm/cpu/arm946es/start.S @@ -155,82 +155,6 @@ reset:  /*------------------------------------------------------------------------------*/ -#ifndef CONFIG_SPL_BUILD -/* - * void relocate_code(addr_moni) - * - * This function relocates the monitor code. - */ -	.globl	relocate_code -relocate_code: -	mov	r6, r0	/* save addr of destination */ - -	adr	r0, _start -	subs	r9, r6, r0		/* r9 <- relocation offset */ -	beq	relocate_done		/* skip relocation */ -	mov	r1, r6			/* r1 <- scratch for copy_loop */ -	ldr	r3, _image_copy_end_ofs -	add	r2, r0, r3		/* r2 <- source end address	    */ - -copy_loop: -	ldmia	r0!, {r10-r11}		/* copy from source address [r0]    */ -	stmia	r1!, {r10-r11}		/* copy to   target address [r1]    */ -	cmp	r0, r2			/* until source end address [r2]    */ -	blo	copy_loop - -	/* -	 * fix .rel.dyn relocations -	 */ -	ldr	r0, _TEXT_BASE		/* r0 <- Text base */ -	ldr	r10, _dynsym_start_ofs	/* r10 <- sym table ofs */ -	add	r10, r10, r0		/* r10 <- sym table in FLASH */ -	ldr	r2, _rel_dyn_start_ofs	/* r2 <- rel dyn start ofs */ -	add	r2, r2, r0		/* r2 <- rel dyn start in FLASH */ -	ldr	r3, _rel_dyn_end_ofs	/* r3 <- rel dyn end ofs */ -	add	r3, r3, r0		/* r3 <- rel dyn end in FLASH */ -fixloop: -	ldr	r0, [r2]		/* r0 <- location to fix up, IN FLASH! */ -	add	r0, r0, r9		/* r0 <- location to fix up in RAM */ -	ldr	r1, [r2, #4] -	and	r7, r1, #0xff -	cmp	r7, #23			/* relative fixup? */ -	beq	fixrel -	cmp	r7, #2			/* absolute fixup? */ -	beq	fixabs -	/* ignore unknown type of fixup */ -	b	fixnext -fixabs: -	/* absolute fix: set location to (offset) symbol value */ -	mov	r1, r1, LSR #4		/* r1 <- symbol index in .dynsym */ -	add	r1, r10, r1		/* r1 <- address of symbol in table */ -	ldr	r1, [r1, #4]		/* r1 <- symbol value */ -	add	r1, r1, r9		/* r1 <- relocated sym addr */ -	b	fixnext -fixrel: -	/* relative fix: increase location by offset */ -	ldr	r1, [r0] -	add	r1, r1, r9 -fixnext: -	str	r1, [r0] -	add	r2, r2, #8		/* each rel.dyn entry is 8 bytes */ -	cmp	r2, r3 -	blo	fixloop - -relocate_done: - -	mov	pc, lr - -_image_copy_end_ofs: -	.word __image_copy_end - _start -_rel_dyn_start_ofs: -	.word __rel_dyn_start - _start -_rel_dyn_end_ofs: -	.word __rel_dyn_end - _start -_dynsym_start_ofs: -	.word __dynsym_start - _start - -#endif -  	.globl	c_runtime_cpu_setup  c_runtime_cpu_setup: diff --git a/arch/arm/cpu/arm_intcm/start.S b/arch/arm/cpu/arm_intcm/start.S index c483b532c..8dfd91974 100644 --- a/arch/arm/cpu/arm_intcm/start.S +++ b/arch/arm/cpu/arm_intcm/start.S @@ -151,82 +151,6 @@ reset:  /*------------------------------------------------------------------------------*/ -#ifndef CONFIG_SPL_BUILD -/* - * void relocate_code(addr_moni) - * - * This function relocates the monitor code. - */ -	.globl	relocate_code -relocate_code: -	mov	r6, r0	/* save addr of destination */ - -	adr	r0, _start -	subs	r9, r6, r0		/* r9 <- relocation offset */ -	beq	relocate_done		/* skip relocation */ -	mov	r1, r6			/* r1 <- scratch for copy_loop */ -	ldr	r3, _image_copy_end_ofs -	add	r2, r0, r3		/* r2 <- source end address	    */ - -copy_loop: -	ldmia	r0!, {r10-r11}		/* copy from source address [r0]    */ -	stmia	r1!, {r10-r11}		/* copy to   target address [r1]    */ -	cmp	r0, r2			/* until source end address [r2]    */ -	blo	copy_loop - -	/* -	 * fix .rel.dyn relocations -	 */ -	ldr	r0, _TEXT_BASE		/* r0 <- Text base */ -	ldr	r10, _dynsym_start_ofs	/* r10 <- sym table ofs */ -	add	r10, r10, r0		/* r10 <- sym table in FLASH */ -	ldr	r2, _rel_dyn_start_ofs	/* r2 <- rel dyn start ofs */ -	add	r2, r2, r0		/* r2 <- rel dyn start in FLASH */ -	ldr	r3, _rel_dyn_end_ofs	/* r3 <- rel dyn end ofs */ -	add	r3, r3, r0		/* r3 <- rel dyn end in FLASH */ -fixloop: -	ldr	r0, [r2]		/* r0 <- location to fix up, IN FLASH! */ -	add	r0, r0, r9		/* r0 <- location to fix up in RAM */ -	ldr	r1, [r2, #4] -	and	r7, r1, #0xff -	cmp	r7, #23			/* relative fixup? */ -	beq	fixrel -	cmp	r7, #2			/* absolute fixup? */ -	beq	fixabs -	/* ignore unknown type of fixup */ -	b	fixnext -fixabs: -	/* absolute fix: set location to (offset) symbol value */ -	mov	r1, r1, LSR #4		/* r1 <- symbol index in .dynsym */ -	add	r1, r10, r1		/* r1 <- address of symbol in table */ -	ldr	r1, [r1, #4]		/* r1 <- symbol value */ -	add	r1, r1, r9		/* r1 <- relocated sym addr */ -	b	fixnext -fixrel: -	/* relative fix: increase location by offset */ -	ldr	r1, [r0] -	add	r1, r1, r9 -fixnext: -	str	r1, [r0] -	add	r2, r2, #8		/* each rel.dyn entry is 8 bytes */ -	cmp	r2, r3 -	blo	fixloop - -relocate_done: - -	bx	lr - -_image_copy_end_ofs: -	.word __image_copy_end - _start -_rel_dyn_start_ofs: -	.word __rel_dyn_start - _start -_rel_dyn_end_ofs: -	.word __rel_dyn_end - _start -_dynsym_start_ofs: -	.word __dynsym_start - _start - -#endif -  	.globl	c_runtime_cpu_setup  c_runtime_cpu_setup: diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S index 3ade510da..8e9cb1911 100644 --- a/arch/arm/cpu/armv7/start.S +++ b/arch/arm/cpu/armv7/start.S @@ -163,82 +163,6 @@ reset:  /*------------------------------------------------------------------------------*/ -#ifndef CONFIG_SPL_BUILD -/* - * void relocate_code(addr_moni) - * - * This function relocates the monitor code. - */ -ENTRY(relocate_code) -	mov	r6, r0	/* save addr of destination */ - -	adr	r0, _start -	subs	r9, r6, r0		/* r9 <- relocation offset */ -	beq	relocate_done		/* skip relocation */ -	mov	r1, r6			/* r1 <- scratch for copy_loop */ -	ldr	r3, _image_copy_end_ofs -	add	r2, r0, r3		/* r2 <- source end address	    */ - -copy_loop: -	ldmia	r0!, {r10-r11}		/* copy from source address [r0]    */ -	stmia	r1!, {r10-r11}		/* copy to   target address [r1]    */ -	cmp	r0, r2			/* until source end address [r2]    */ -	blo	copy_loop - -	/* -	 * fix .rel.dyn relocations -	 */ -	ldr	r0, _TEXT_BASE		/* r0 <- Text base */ -	ldr	r10, _dynsym_start_ofs	/* r10 <- sym table ofs */ -	add	r10, r10, r0		/* r10 <- sym table in FLASH */ -	ldr	r2, _rel_dyn_start_ofs	/* r2 <- rel dyn start ofs */ -	add	r2, r2, r0		/* r2 <- rel dyn start in FLASH */ -	ldr	r3, _rel_dyn_end_ofs	/* r3 <- rel dyn end ofs */ -	add	r3, r3, r0		/* r3 <- rel dyn end in FLASH */ -fixloop: -	ldr	r0, [r2]		/* r0 <- location to fix up, IN FLASH! */ -	add	r0, r0, r9		/* r0 <- location to fix up in RAM */ -	ldr	r1, [r2, #4] -	and	r7, r1, #0xff -	cmp	r7, #23			/* relative fixup? */ -	beq	fixrel -	cmp	r7, #2			/* absolute fixup? */ -	beq	fixabs -	/* ignore unknown type of fixup */ -	b	fixnext -fixabs: -	/* absolute fix: set location to (offset) symbol value */ -	mov	r1, r1, LSR #4		/* r1 <- symbol index in .dynsym */ -	add	r1, r10, r1		/* r1 <- address of symbol in table */ -	ldr	r1, [r1, #4]		/* r1 <- symbol value */ -	add	r1, r1, r9		/* r1 <- relocated sym addr */ -	b	fixnext -fixrel: -	/* relative fix: increase location by offset */ -	ldr	r1, [r0] -	add	r1, r1, r9 -fixnext: -	str	r1, [r0] -	add	r2, r2, #8		/* each rel.dyn entry is 8 bytes */ -	cmp	r2, r3 -	blo	fixloop - -relocate_done: - -	bx	lr - -_image_copy_end_ofs: -	.word __image_copy_end - _start -_rel_dyn_start_ofs: -	.word __rel_dyn_start - _start -_rel_dyn_end_ofs: -	.word __rel_dyn_end - _start -_dynsym_start_ofs: -	.word __dynsym_start - _start -ENDPROC(relocate_code) - -#endif -  ENTRY(c_runtime_cpu_setup)  /*   * If I-cache is enabled invalidate it diff --git a/arch/arm/cpu/ixp/start.S b/arch/arm/cpu/ixp/start.S index 8458f450a..46cba0cf7 100644 --- a/arch/arm/cpu/ixp/start.S +++ b/arch/arm/cpu/ixp/start.S @@ -253,82 +253,6 @@ reset:  /*------------------------------------------------------------------------------*/ -#ifndef CONFIG_SPL_BUILD -/* - * void relocate_code(addr_moni) - * - * This function relocates the monitor code. - */ -	.globl	relocate_code -relocate_code: -	mov	r6, r0	/* save addr of destination */ - -	adr	r0, _start -	subs	r9, r6, r0		/* r9 <- relocation offset */ -	beq	relocate_done		/* skip relocation */ -	mov	r1, r6			/* r1 <- scratch for copy_loop */ -	ldr	r3, _image_copy_end_ofs -	add	r2, r0, r3		/* r2 <- source end address	    */ - -copy_loop: -	ldmia	r0!, {r10-r11}		/* copy from source address [r0]    */ -	stmia	r1!, {r10-r11}		/* copy to   target address [r1]    */ -	cmp	r0, r2			/* until source end address [r2]    */ -	blo	copy_loop - -	/* -	 * fix .rel.dyn relocations -	 */ -	ldr	r0, _TEXT_BASE		/* r0 <- Text base */ -	ldr	r10, _dynsym_start_ofs	/* r10 <- sym table ofs */ -	add	r10, r10, r0		/* r10 <- sym table in FLASH */ -	ldr	r2, _rel_dyn_start_ofs	/* r2 <- rel dyn start ofs */ -	add	r2, r2, r0		/* r2 <- rel dyn start in FLASH */ -	ldr	r3, _rel_dyn_end_ofs	/* r3 <- rel dyn end ofs */ -	add	r3, r3, r0		/* r3 <- rel dyn end in FLASH */ -fixloop: -	ldr	r0, [r2]		/* r0 <- location to fix up, IN FLASH! */ -	add	r0, r0, r9		/* r0 <- location to fix up in RAM */ -	ldr	r1, [r2, #4] -	and	r7, r1, #0xff -	cmp	r7, #23			/* relative fixup? */ -	beq	fixrel -	cmp	r7, #2			/* absolute fixup? */ -	beq	fixabs -	/* ignore unknown type of fixup */ -	b	fixnext -fixabs: -	/* absolute fix: set location to (offset) symbol value */ -	mov	r1, r1, LSR #4		/* r1 <- symbol index in .dynsym */ -	add	r1, r10, r1		/* r1 <- address of symbol in table */ -	ldr	r1, [r1, #4]		/* r1 <- symbol value */ -	add	r1, r1, r9		/* r1 <- relocated sym addr */ -	b	fixnext -fixrel: -	/* relative fix: increase location by offset */ -	ldr	r1, [r0] -	add	r1, r1, r9 -fixnext: -	str	r1, [r0] -	add	r2, r2, #8		/* each rel.dyn entry is 8 bytes */ -	cmp	r2, r3 -	blo	fixloop - -relocate_done: - -	bx	lr - -_image_copy_end_ofs: -	.word __image_copy_end - _start -_rel_dyn_start_ofs: -	.word __rel_dyn_start - _start -_rel_dyn_end_ofs: -	.word __rel_dyn_end - _start -_dynsym_start_ofs: -	.word __dynsym_start - _start - -#endif -  	.globl	c_runtime_cpu_setup  c_runtime_cpu_setup: diff --git a/arch/arm/cpu/pxa/start.S b/arch/arm/cpu/pxa/start.S index 595778a7b..2e3f65ee8 100644 --- a/arch/arm/cpu/pxa/start.S +++ b/arch/arm/cpu/pxa/start.S @@ -167,94 +167,24 @@ reset:  	bl	_main  /*------------------------------------------------------------------------------*/ -#ifndef CONFIG_SPL_BUILD -/* - * void relocate_code(addr_moni) - * - * This function relocates the monitor code. - */ -	.globl	relocate_code -relocate_code: -	mov	r6, r0	/* save addr of destination */ -/* Disable the Dcache RAM lock for stack now */ -#ifdef	CONFIG_CPU_PXA25X -	mov	r12, lr -	bl	cpu_init_crit -	mov	lr, r12 -#endif - -	adr	r0, _start -	subs	r9, r6, r0		/* r9 <- relocation offset */ -	beq	relocate_done		/* skip relocation */ -	mov	r1, r6			/* r1 <- scratch for copy_loop */ -	ldr	r3, _image_copy_end_ofs -	add	r2, r0, r3		/* r2 <- source end address	    */ - -copy_loop: -	ldmia	r0!, {r10-r11}		/* copy from source address [r0]    */ -	stmia	r1!, {r10-r11}		/* copy to   target address [r1]    */ -	cmp	r0, r2			/* until source end address [r2]    */ -	blo	copy_loop +	.globl	c_runtime_cpu_setup +c_runtime_cpu_setup: +#ifdef CONFIG_CPU_PXA25X  	/* -	 * fix .rel.dyn relocations +	 * Unlock (actually, disable) the cache now that board_init_f +	 * is done. We could do this earlier but we would need to add +	 * a new C runtime hook, whereas c_runtime_cpu_setup already +	 * exists. +	 * As this routine is just a call to cpu_init_crit, let us +	 * tail-optimize and do a simple branch here.  	 */ -	ldr	r0, _TEXT_BASE		/* r0 <- Text base */ -	ldr	r10, _dynsym_start_ofs	/* r10 <- sym table ofs */ -	add	r10, r10, r0		/* r10 <- sym table in FLASH */ -	ldr	r2, _rel_dyn_start_ofs	/* r2 <- rel dyn start ofs */ -	add	r2, r2, r0		/* r2 <- rel dyn start in FLASH */ -	ldr	r3, _rel_dyn_end_ofs	/* r3 <- rel dyn end ofs */ -	add	r3, r3, r0		/* r3 <- rel dyn end in FLASH */ -fixloop: -	ldr	r0, [r2]		/* r0 <- location to fix up, IN FLASH! */ -	add	r0, r0, r9		/* r0 <- location to fix up in RAM */ -	ldr	r1, [r2, #4] -	and	r7, r1, #0xff -	cmp	r7, #23			/* relative fixup? */ -	beq	fixrel -	cmp	r7, #2			/* absolute fixup? */ -	beq	fixabs -	/* ignore unknown type of fixup */ -	b	fixnext -fixabs: -	/* absolute fix: set location to (offset) symbol value */ -	mov	r1, r1, LSR #4		/* r1 <- symbol index in .dynsym */ -	add	r1, r10, r1		/* r1 <- address of symbol in table */ -	ldr	r1, [r1, #4]		/* r1 <- symbol value */ -	add	r1, r1, r9		/* r1 <- relocated sym addr */ -	b	fixnext -fixrel: -	/* relative fix: increase location by offset */ -	ldr	r1, [r0] -	add	r1, r1, r9 -fixnext: -	str	r1, [r0] -	add	r2, r2, #8		/* each rel.dyn entry is 8 bytes */ -	cmp	r2, r3 -	blo	fixloop - -relocate_done: - +	b	cpu_init_crit +#else  	bx	lr - -_image_copy_end_ofs: -	.word __image_copy_end - _start -_rel_dyn_start_ofs: -	.word __rel_dyn_start - _start -_rel_dyn_end_ofs: -	.word __rel_dyn_end - _start -_dynsym_start_ofs: -	.word __dynsym_start - _start -  #endif -	.globl	c_runtime_cpu_setup -c_runtime_cpu_setup: - -	bx	lr -  /*   *************************************************************************   * diff --git a/arch/arm/cpu/s3c44b0/start.S b/arch/arm/cpu/s3c44b0/start.S index 33a0a814f..78183fc19 100644 --- a/arch/arm/cpu/s3c44b0/start.S +++ b/arch/arm/cpu/s3c44b0/start.S @@ -136,82 +136,6 @@ reset:  /*------------------------------------------------------------------------------*/ -#ifndef CONFIG_SPL_BUILD -/* - * void relocate_code(addr_moni) - * - * This function relocates the monitor code. - */ -	.globl	relocate_code -relocate_code: -	mov	r6, r0	/* save addr of destination */ - -	adr	r0, _start -	subs	r9, r6, r0		/* r9 <- relocation offset */ -	beq	relocate_done		/* skip relocation */ -	mov	r1, r6			/* r1 <- scratch for copy_loop */ -	ldr	r3, _image_copy_end_ofs -	add	r2, r0, r3		/* r2 <- source end address	    */ - -copy_loop: -	ldmia	r0!, {r10-r11}		/* copy from source address [r0]    */ -	stmia	r1!, {r10-r11}		/* copy to   target address [r1]    */ -	cmp	r0, r2			/* until source end address [r2]    */ -	blo	copy_loop - -	/* -	 * fix .rel.dyn relocations -	 */ -	ldr	r0, _TEXT_BASE		/* r0 <- Text base */ -	ldr	r10, _dynsym_start_ofs	/* r10 <- sym table ofs */ -	add	r10, r10, r0		/* r10 <- sym table in FLASH */ -	ldr	r2, _rel_dyn_start_ofs	/* r2 <- rel dyn start ofs */ -	add	r2, r2, r0		/* r2 <- rel dyn start in FLASH */ -	ldr	r3, _rel_dyn_end_ofs	/* r3 <- rel dyn end ofs */ -	add	r3, r3, r0		/* r3 <- rel dyn end in FLASH */ -fixloop: -	ldr	r0, [r2]		/* r0 <- location to fix up, IN FLASH! */ -	add	r0, r0, r9		/* r0 <- location to fix up in RAM */ -	ldr	r1, [r2, #4] -	and	r7, r1, #0xff -	cmp	r7, #23			/* relative fixup? */ -	beq	fixrel -	cmp	r7, #2			/* absolute fixup? */ -	beq	fixabs -	/* ignore unknown type of fixup */ -	b	fixnext -fixabs: -	/* absolute fix: set location to (offset) symbol value */ -	mov	r1, r1, LSR #4		/* r1 <- symbol index in .dynsym */ -	add	r1, r10, r1		/* r1 <- address of symbol in table */ -	ldr	r1, [r1, #4]		/* r1 <- symbol value */ -	add	r1, r1, r9		/* r1 <- relocated sym addr */ -	b	fixnext -fixrel: -	/* relative fix: increase location by offset */ -	ldr	r1, [r0] -	add	r1, r1, r9 -fixnext: -	str	r1, [r0] -	add	r2, r2, #8		/* each rel.dyn entry is 8 bytes */ -	cmp	r2, r3 -	blo	fixloop - -relocate_done: - -	bx	lr - -_image_copy_end_ofs: -	.word __image_copy_end - _start -_rel_dyn_start_ofs: -	.word __rel_dyn_start - _start -_rel_dyn_end_ofs: -	.word __rel_dyn_end - _start -_dynsym_start_ofs: -	.word __dynsym_start - _start - -#endif -  	.globl	c_runtime_cpu_setup  c_runtime_cpu_setup: diff --git a/arch/arm/cpu/sa1100/start.S b/arch/arm/cpu/sa1100/start.S index e0c45d6a0..30d5a9021 100644 --- a/arch/arm/cpu/sa1100/start.S +++ b/arch/arm/cpu/sa1100/start.S @@ -140,82 +140,6 @@ reset:  /*------------------------------------------------------------------------------*/ -#ifndef CONFIG_SPL_BUILD -/* - * void relocate_code(addr_moni) - * - * This function relocates the monitor code. - */ -	.globl	relocate_code -relocate_code: -	mov	r6, r0	/* save addr of destination */ - -	adr	r0, _start -	subs	r9, r6, r0		/* r9 <- relocation offset */ -	beq	relocate_done		/* skip relocation */ -	mov	r1, r6			/* r1 <- scratch for copy_loop */ -	ldr	r3, _image_copy_end_ofs -	add	r2, r0, r3		/* r2 <- source end address	    */ - -copy_loop: -	ldmia	r0!, {r10-r11}		/* copy from source address [r0]    */ -	stmia	r1!, {r10-r11}		/* copy to   target address [r1]    */ -	cmp	r0, r2			/* until source end address [r2]    */ -	blo	copy_loop - -	/* -	 * fix .rel.dyn relocations -	 */ -	ldr	r0, _TEXT_BASE		/* r0 <- Text base */ -	ldr	r10, _dynsym_start_ofs	/* r10 <- sym table ofs */ -	add	r10, r10, r0		/* r10 <- sym table in FLASH */ -	ldr	r2, _rel_dyn_start_ofs	/* r2 <- rel dyn start ofs */ -	add	r2, r2, r0		/* r2 <- rel dyn start in FLASH */ -	ldr	r3, _rel_dyn_end_ofs	/* r3 <- rel dyn end ofs */ -	add	r3, r3, r0		/* r3 <- rel dyn end in FLASH */ -fixloop: -	ldr	r0, [r2]		/* r0 <- location to fix up, IN FLASH! */ -	add	r0, r0, r9		/* r0 <- location to fix up in RAM */ -	ldr	r1, [r2, #4] -	and	r7, r1, #0xff -	cmp	r7, #23			/* relative fixup? */ -	beq	fixrel -	cmp	r7, #2			/* absolute fixup? */ -	beq	fixabs -	/* ignore unknown type of fixup */ -	b	fixnext -fixabs: -	/* absolute fix: set location to (offset) symbol value */ -	mov	r1, r1, LSR #4		/* r1 <- symbol index in .dynsym */ -	add	r1, r10, r1		/* r1 <- address of symbol in table */ -	ldr	r1, [r1, #4]		/* r1 <- symbol value */ -	add	r1, r1, r9		/* r1 <- relocated sym addr */ -	b	fixnext -fixrel: -	/* relative fix: increase location by offset */ -	ldr	r1, [r0] -	add	r1, r1, r9 -fixnext: -	str	r1, [r0] -	add	r2, r2, #8		/* each rel.dyn entry is 8 bytes */ -	cmp	r2, r3 -	blo	fixloop - -relocate_done: - -	mov	pc, lr - -_image_copy_end_ofs: -	.word __image_copy_end - _start -_rel_dyn_start_ofs: -	.word __rel_dyn_start - _start -_rel_dyn_end_ofs: -	.word __rel_dyn_end - _start -_dynsym_start_ofs: -	.word __dynsym_start - _start - -#endif -  	.globl	c_runtime_cpu_setup  c_runtime_cpu_setup: diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile index 5b2cb61dc..8ad9f66a5 100644 --- a/arch/arm/lib/Makefile +++ b/arch/arm/lib/Makefile @@ -39,6 +39,7 @@ GLCOBJS	+= div0.o  SOBJS-y += crt0.o  ifndef CONFIG_SPL_BUILD +SOBJS-y += relocate.o  ifndef CONFIG_SYS_GENERIC_BOARD  COBJS-y	+= board.o  endif diff --git a/arch/arm/lib/relocate.S b/arch/arm/lib/relocate.S new file mode 100644 index 000000000..4446da94c --- /dev/null +++ b/arch/arm/lib/relocate.S @@ -0,0 +1,112 @@ +/* + *  relocate - common relocation function for ARM U-Boot + * + *  Copyright (c) 2013  Albert ARIBAUD <albert.u.boot@aribaud.net> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <linux/linkage.h> + +/* + * void relocate_code(addr_moni) + * + * This function relocates the monitor code. + * + * NOTE: + * To prevent the code below from containing references with an R_ARM_ABS32 + * relocation record type, we never refer to linker-defined symbols directly. + * Instead, we declare literals which contain their relative location with + * respect to relocate_code, and at run time, add relocate_code back to them. + */ + +ENTRY(relocate_code) +	mov	r6, r0	/* save addr of destination */ + +	ldr	r0, =_start		/* r0 <- SRC &_start */ +	subs	r9, r6, r0		/* r9 <- relocation offset */ +	beq	relocate_done		/* skip relocation */ +	mov	r1, r6			/* r1 <- scratch for copy loop */ +	adr	r7, relocate_code	/* r7 <- SRC &relocate_code */ +	ldr	r3, _image_copy_end_ofs	/* r3 <- __image_copy_end local ofs */ +	add	r2, r7, r3		/* r2 <- SRC &__image_copy_end */ + +copy_loop: +	ldmia	r0!, {r10-r11}		/* copy from source address [r0]    */ +	stmia	r1!, {r10-r11}		/* copy to   target address [r1]    */ +	cmp	r0, r2			/* until source end address [r2]    */ +	blo	copy_loop + +	/* +	 * fix .rel.dyn relocations +	 */ +	ldr	r10, _dynsym_start_ofs	/* r10 <- __dynsym_start local ofs */ +	add	r10, r10, r7		/* r10 <- SRC &__dynsym_start */ +	ldr	r2, _rel_dyn_start_ofs	/* r2 <- __rel_dyn_start local ofs */ +	add	r2, r2, r7		/* r2 <- SRC &__rel_dyn_start */ +	ldr	r3, _rel_dyn_end_ofs	/* r3 <- __rel_dyn_end local ofs */ +	add	r3, r3, r7		/* r3 <- SRC &__rel_dyn_end */ +fixloop: +	ldr	r0, [r2]		/* r0 <- SRC location to fix up */ +	add	r0, r0, r9		/* r0 <- DST location to fix up */ +	ldr	r1, [r2, #4] +	and	r7, r1, #0xff +	cmp	r7, #23			/* relative fixup? */ +	beq	fixrel +	cmp	r7, #2			/* absolute fixup? */ +	beq	fixabs +	/* ignore unknown type of fixup */ +	b	fixnext +fixabs: +	/* absolute fix: set location to (offset) symbol value */ +	mov	r1, r1, LSR #4		/* r1 <- symbol index in .dynsym */ +	add	r1, r10, r1		/* r1 <- address of symbol in table */ +	ldr	r1, [r1, #4]		/* r1 <- symbol value */ +	add	r1, r1, r9		/* r1 <- relocated sym addr */ +	b	fixnext +fixrel: +	/* relative fix: increase location by offset */ +	ldr	r1, [r0] +	add	r1, r1, r9 +fixnext: +	str	r1, [r0] +	add	r2, r2, #8		/* each rel.dyn entry is 8 bytes */ +	cmp	r2, r3 +	blo	fixloop + +relocate_done: + +	/* ARMv4- don't know bx lr but the assembler fails to see that */ + +#ifdef __ARM_ARCH_4__ +        mov        pc, lr +#else +        bx        lr +#endif + +_image_copy_end_ofs: +	.word __image_copy_end - relocate_code +_rel_dyn_start_ofs: +	.word __rel_dyn_start - relocate_code +_rel_dyn_end_ofs: +	.word __rel_dyn_end - relocate_code +_dynsym_start_ofs: +	.word __dynsym_start - relocate_code + +ENDPROC(relocate_code) |