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base-hw & arm: bugs when zero-filling BSS

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fix #654
This commit is contained in:
Martin Stein 2013-02-20 16:45:41 +01:00 committed by Norman Feske
parent 34ec65f2a8
commit 3047e32dfd
2 changed files with 8 additions and 7 deletions
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11
base-hw/src/core/arm/crt0.s
View File

@ -33,18 +33,19 @@
/* idle a little initially because 'u-boot' likes it this way */
_nop 8
/* zero-fill BSS segment */
/* zero-fill BSS segment, BSS boundaries must be aligned to 4 */
.extern _bss_start
.extern _bss_end
ldr r0, =_bss_start
ldr r1, =_bss_end
mov r2, #0
sub r1, r1, #4
1:
cmp r1, r0
ble 2f
str r2, [r0]
add r0, r0, #4
cmp r0, r1
bne 1b
b 1b
2:
/* enable C++ to prepare the first kernel run */
ldr sp, =_kernel_stack_high
@ -57,7 +58,7 @@
bl kernel
/* catch erroneous kernel return */
2: b 2b
3: b 3b
/* handle for dynamic symbol objects */
.align 3

4
base-hw/src/platform/genode.ld
View File

@ -109,10 +109,10 @@ SECTIONS
} : rw
.bss : {
_bss_start = .;
_bss_start = ALIGN(4);
*(.bss .bss.* .gnu.linkonce.b.* COMMON)
}
_bss_end = .;
_bss_end = ALIGN(4);
_prog_img_end = .;
/DISCARD/ : {