arm: fixloop(): do not use r8 for relocation

[karo-tx-uboot.git] / arch / arm / cpu / arm1176 / start.S

diff --git a/arch/arm/cpu/arm1176/start.S b/arch/arm/cpu/arm1176/start.S
index f04d2688814e238bf460f5a56bef9c11a4a9b24e..dc692edc16e3e7293b75d0990d9c47621c97d528 100644 (file)
--- a/arch/arm/cpu/arm1176/start.S
+++ b/arch/arm/cpu/arm1176/start.S
@@ -123,34 +123,6 @@ _bss_start_ofs:
 _bss_end_ofs:
        .word _end - _start
 
-.globl _datarel_start_ofs
-_datarel_start_ofs:
-       .word __datarel_start - _start
-
-.globl _datarelrolocal_start_ofs
-_datarelrolocal_start_ofs:
-       .word __datarelrolocal_start - _start
-
-.globl _datarellocal_start_ofs
-_datarellocal_start_ofs:
-       .word __datarellocal_start - _start
-
-.globl _datarelro_start_ofs
-_datarelro_start_ofs:
-       .word __datarelro_start - _start
-
-.globl _rel_dyn_start_ofs
-_rel_dyn_start_ofs:
-       .word __rel_dyn_start - _start
-
-.globl _rel_dyn_end_ofs
-_rel_dyn_end_ofs:
-       .word __rel_dyn_end - _start
-
-.globl _dynsym_start_ofs
-_dynsym_start_ofs:
-       .word __dynsym_start - _start
-
 /* IRQ stack memory (calculated at run-time) + 8 bytes */
 .globl IRQ_STACK_START_IN
 IRQ_STACK_START_IN:
@@ -251,6 +223,7 @@ skip_tcmdisable:
 /* Set stackpointer in internal RAM to call board_init_f */
 call_board_init_f:
        ldr     sp, =(CONFIG_SYS_INIT_SP_ADDR)
+       bic     sp, sp, #7 /* 8-byte alignment for ABI compliance */
        ldr     r0,=0x00000000
        bl      board_init_f
 
@@ -268,22 +241,22 @@ relocate_code:
        mov     r4, r0  /* save addr_sp */
        mov     r5, r1  /* save addr of gd */
        mov     r6, r2  /* save addr of destination */
-       mov     r7, r2  /* save addr of destination */
 
        /* Set up the stack                                                 */
 stack_setup:
        mov     sp, r4
 
        adr     r0, _start
+       cmp     r0, r6
+       beq     clear_bss               /* skip relocation */
+       mov     r1, r6                  /* r1 <- scratch for copy_loop */
        ldr     r2, _TEXT_BASE
        ldr     r3, _bss_start_ofs
        add     r2, r0, r3              /* r2 <- source end address         */
-       cmp     r0, r6
-       beq     clear_bss
 
 copy_loop:
        ldmia   r0!, {r9-r10}           /* copy from source address [r0]    */
-       stmia   r6!, {r9-r10}           /* copy to   target address [r1]    */
+       stmia   r1!, {r9-r10}           /* copy to   target address [r1]    */
        cmp     r0, r2                  /* until source end address [r2]    */
        blo     copy_loop
 
@@ -292,7 +265,7 @@ copy_loop:
         * fix .rel.dyn relocations
         */
        ldr     r0, _TEXT_BASE          /* r0 <- Text base */
-       sub     r9, r7, r0              /* r9 <- relocation offset */
+       sub     r9, r6, r0              /* r9 <- relocation offset */
        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 */
@@ -300,13 +273,13 @@ copy_loop:
        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     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     r8, r1, #0xff
-       cmp     r8, #23         /* relative fixup? */
+       and     r7, r1, #0xff
+       cmp     r7, #23                 /* relative fixup? */
        beq     fixrel
-       cmp     r8, #2          /* absolute fixup? */
+       cmp     r7, #2                  /* absolute fixup? */
        beq     fixabs
        /* ignore unknown type of fixup */
        b       fixnext
@@ -315,7 +288,7 @@ fixabs:
        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 */
+       add     r1, r9                  /* r1 <- relocated sym addr */
        b       fixnext
 fixrel:
        /* relative fix: increase location by offset */
@@ -323,7 +296,7 @@ fixrel:
        add     r1, r1, r9
 fixnext:
        str     r1, [r0]
-       add     r2, r2, #8      /* each rel.dyn entry is 8 bytes */
+       add     r2, r2, #8              /* each rel.dyn entry is 8 bytes */
        cmp     r2, r3
        blo     fixloop
 #endif
@@ -371,7 +344,7 @@ clear_bss:
        ldr     r0, _bss_start_ofs
        ldr     r1, _bss_end_ofs
        ldr     r3, _TEXT_BASE          /* Text base */
-       mov     r4, r7                  /* reloc addr */
+       mov     r4, r6                  /* reloc addr */
        add     r0, r0, r4
        add     r1, r1, r4
        mov     r2, #0x00000000         /* clear                            */
@@ -400,7 +373,7 @@ _nand_boot: .word nand_boot
        add     lr, lr, r9
        /* setup parameters for board_init_r */
        mov     r0, r5          /* gd_t */
-       mov     r1, r7          /* dest_addr */
+       mov     r1, r6          /* dest_addr */
        /* jump to it ... */
        mov     pc, lr
 
@@ -408,6 +381,13 @@ _board_init_r_ofs:
        .word board_init_r - _start
 #endif
 
+_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
+
 #ifdef CONFIG_ENABLE_MMU
 _mmu_table_base:
        .word mmu_table