ppc64 requires the stack to be 16-byte aligned but the interrupt
stack frame has 8-byte aligned size. Add padding to fix.
Signed-off-by: Nicholas Piggin <npiggin@xxxxxxxxx>
---
lib/powerpc/setup.c | 3 +++
lib/ppc64/asm/ptrace.h | 1 +
2 files changed, 4 insertions(+)
diff --git a/lib/powerpc/setup.c b/lib/powerpc/setup.c
index 1be4c030..d98f66fa 100644
--- a/lib/powerpc/setup.c
+++ b/lib/powerpc/setup.c
@@ -18,6 +18,7 @@
#include <argv.h>
#include <asm/setup.h>
#include <asm/page.h>
+#include <asm/ptrace.h>
#include <asm/hcall.h>
#include "io.h"
@@ -195,6 +196,8 @@ void setup(const void *fdt)
freemem += initrd_size;
}
+ assert(STACK_INT_FRAME_SIZE % 16 == 0);
+
/* call init functions */
cpu_init();
diff --git a/lib/ppc64/asm/ptrace.h b/lib/ppc64/asm/ptrace.h
index 076c9d9c..12de7499 100644
--- a/lib/ppc64/asm/ptrace.h
+++ b/lib/ppc64/asm/ptrace.h
@@ -14,6 +14,7 @@ struct pt_regs {
unsigned long xer;
unsigned long ccr;
unsigned long trap;
+ unsigned long _pad; /* stack must be 16-byte aligned */
};
#define STACK_INT_FRAME_SIZE (sizeof(struct pt_regs) + \
--
2.42.0
