D61519.1794691298.diff
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D61519.1794691298.diff
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	diff --git a/sys/powerpc/powerpc/exec_machdep.c b/sys/powerpc/powerpc/exec_machdep.c
	--- a/sys/powerpc/powerpc/exec_machdep.c
	+++ b/sys/powerpc/powerpc/exec_machdep.c
	@@ -213,11 +213,7 @@
	sfp = (caddr_t)&sf;
	sfpsize = sizeof(sf);
	#ifdef __powerpc64__
	- /*
	- * 64-bit PPC defines a 512 byte red zone below
	- * the existing stack (ELF ABI v2 §2.2.2.4)
	- */
	- rndfsize = 512 + roundup(sizeof(sf), 48);
	+ rndfsize = roundup(sizeof(sf), 48);
	#else
	rndfsize = roundup(sizeof(sf), 16);
	#endif
	@@ -252,6 +248,14 @@
	usfp = (void *)(((uintptr_t)td->td_sigstk.ss_sp +
	td->td_sigstk.ss_size - rndfsize) & ~0xFul);
	} else {
	+ #ifdef __powerpc64__
	+ /*
	+ * 64-bit PPC defines a 512 byte red zone below
	+ * the existing stack (ELF ABI v2 §2.2.2.4)
	+ */
	+ if (!SV_PROC_FLAG(p, SV_ILP32))
	+ sp -= 512;
	+ #endif
	usfp = (void *)((sp - rndfsize) & ~0xFul);
	}