[Qemu-devel] [PATCH] linux-user: avoid gcc array overrun warning for sparc

[Peter Maydell <peter.maydell@linaro.org>]

Suppress a gcc array bounds overrun warning when filling in the SPARC
signal frame by adjusting our definition of the structure so that the
fp and callers_pc membes are part of the ins[] array rather than
separate fields; since qemu has no need to access the fields individually
there is no need to follow the kernel's structure field naming exactly.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
This is a fix for another warning that the armel gcc gives:
linux-user/signal.c:1979: error: array subscript is above array bounds
so if it passes review I think it's a good candidate for putting in 0.14.

 linux-user/signal.c |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/linux-user/signal.c b/linux-user/signal.c
index 0664770..b01bd64 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -1817,9 +1817,10 @@ struct target_sigcontext {
 /* A Sparc stack frame */
 struct sparc_stackf {
         abi_ulong locals[8];
-        abi_ulong ins[6];
-        struct sparc_stackf *fp;
-        abi_ulong callers_pc;
+        abi_ulong ins[8];
+        /* It's simpler to treat fp and callers_pc as elements of ins[]
+         * since we never need to access them ourselves.
+         */
         char *structptr;
         abi_ulong xargs[6];
         abi_ulong xxargs[1];
-- 
1.7.1