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MIPS: zboot: Avoid endless loop in clear BSS.

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Commit 2ee1503e54 ("MIPS: zboot: head.S clean up").

After .noreorder removed, clear BSS fall into endless loop. The bne
instruction will add nop to the delay slot at compile time. So a0
register will not increment by 4. Fix it and clear BSS from _edata
to (_end - 1).

Signed-off-by: Jinyang He <hejinyang@loongson.cn>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Jinyang He 2021-01-06 08:47:39 +08:00 committed by Thomas Bogendoerfer
parent a6e83acee2
commit fdd85e04df
1 changed files with 1 additions and 1 deletions
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2
arch/mips/boot/compressed/head.S
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@ -26,8 +26,8 @@
PTR_LA a0, _edata
PTR_LA a2, _end
1: sw zero, 0(a0)
addiu a0, a0, 4
bne a2, a0, 1b
addiu a0, a0, 4
PTR_LA a0, (.heap) /* heap address */
PTR_LA sp, (.stack + 8192) /* stack address */