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Clear BSS at startup

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This commit is contained in:
Jim Paris 2010-09-28 16:29:36 -04:00
parent 03293b60ad
commit ae70d57d75
1 changed files with 11 additions and 0 deletions
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11
src/start.S
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@ -128,6 +128,17 @@ _begin:
#endif #endif
msr CPSR_c, #(SYS_MODE) msr CPSR_c, #(SYS_MODE)
/* Clear BSS */
clear_bss:
ldr r0, _bss_start /* find start of bss segment */
ldr r1, _bss_end /* stop here */
mov r2, #0x00000000 /* clear */
clbss_l:
str r2, [r0] /* clear loop... */
add r0, r0, #4
cmp r0, r1
blt clbss_l
b main b main
// ldr r1,=_system_stack // ldr r1,=_system_stack