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powerpc/8xx: Force VIRT_IMMR_BASE to be a positive number

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The asm-offsets mechanism generates signed numbers, even if the
input value is explicitly unsigned.  This causes a problem with
older binutils (e.g. 2.23), which sign-extend a negative number
when @h is applied.  Thus, this instruction:

	cmpli   cr0, r11, VIRT_IMMR_BASE@h

resulted in this:

Error: operand out of range (0xfffffff0 is not between 0x00000000 and
0x0000ffff)

By casting to a larger type, we can force the output to be expressed
as a positive number.

Signed-off-by: Scott Wood <oss@buserror.net>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
This commit is contained in:
Scott Wood 2016-07-09 03:22:39 -05:00
parent 62f64b49d0
commit 9f595fd8b5
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/kernel/asm-offsets.c
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@ -754,7 +754,7 @@ int main(void)
DEFINE(PPC_DBELL_SERVER, PPC_DBELL_SERVER);
#ifdef CONFIG_PPC_8xx
DEFINE(VIRT_IMMR_BASE, __fix_to_virt(FIX_IMMR_BASE));
DEFINE(VIRT_IMMR_BASE, (u64)__fix_to_virt(FIX_IMMR_BASE));
#endif
return 0;