Re: [PATCH 1/3] powerpc/vdso: augment VDSO32 functions to support 64 bits build
From: Segher Boessenkool <hidden>
Date: 2021-12-21 19:41:57
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On Tue, Dec 21, 2021 at 05:49:33PM +0000, Christophe Leroy wrote:
quoted hunk ↗ jump to hunk
diff --git a/arch/powerpc/kernel/vdso32/datapage.S b/arch/powerpc/kernel/vdso32/datapage.S index 65244416ab94..db8e167f0166 100644 --- a/arch/powerpc/kernel/vdso32/datapage.S +++ b/arch/powerpc/kernel/vdso32/datapage.S@@ -30,11 +30,15 @@ V_FUNCTION_BEGIN(__kernel_get_syscall_map) mr. r4,r3 get_datapage r3 mtlr r12 +#ifdef __powerpc64__ + addi r3,r3,CFG_SYSCALL_MAP64 +#else addi r3,r3,CFG_SYSCALL_MAP32 +#endif + crclr cr0*4+so beqlr li r0,NR_syscalls stw r0,0(r4) - crclr cr0*4+so blr
This now clears cr0.3 if r3 is zero on entry. Is that on purpose? Rest looks good. Reviewed-by: Segher Boessenkool <redacted> Segher