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[Qemu-devel] [PATCH 6/6] linux-user: Fix trampoline code for CRIS
From: |
edgar . iglesias |
Subject: |
[Qemu-devel] [PATCH 6/6] linux-user: Fix trampoline code for CRIS |
Date: |
Sun, 2 Feb 2014 03:04:52 +0000 |
From: Stefan Weil <address@hidden>
__put_user can write bytes, words (2 bytes) or longwords (4 bytes).
Here obviously words should have been written, but bytes were written,
so values like 0x9c5f were truncated to 0x5f.
Fix this by changing retcode from uint8_t to to uint16_t in
target_signal_frame and also in the unused rt_signal_frame.
This problem was reported by static code analysis (smatch).
Cc: address@hidden
Signed-off-by: Stefan Weil <address@hidden>
Reviewed-by: Peter Maydell <address@hidden>
Tested-by: Edgar E. Iglesias <address@hidden>
Reviewed-by: Edgar E. Iglesias <address@hidden>
Signed-off-by: Edgar E. Iglesias <address@hidden>
---
linux-user/signal.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/linux-user/signal.c b/linux-user/signal.c
index 01d7c39..82e8592 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -3659,7 +3659,7 @@ struct target_sigcontext {
struct target_signal_frame {
struct target_sigcontext sc;
uint32_t extramask[TARGET_NSIG_WORDS - 1];
- uint8_t retcode[8]; /* Trampoline code. */
+ uint16_t retcode[4]; /* Trampoline code. */
};
struct rt_signal_frame {
@@ -3667,7 +3667,7 @@ struct rt_signal_frame {
void *puc;
siginfo_t info;
struct ucontext uc;
- uint8_t retcode[8]; /* Trampoline code. */
+ uint16_t retcode[4]; /* Trampoline code. */
};
static void setup_sigcontext(struct target_sigcontext *sc, CPUCRISState *env)
@@ -3745,8 +3745,8 @@ static void setup_frame(int sig, struct target_sigaction
*ka,
*/
err |= __put_user(0x9c5f, frame->retcode+0);
err |= __put_user(TARGET_NR_sigreturn,
- frame->retcode+2);
- err |= __put_user(0xe93d, frame->retcode+4);
+ frame->retcode + 1);
+ err |= __put_user(0xe93d, frame->retcode + 2);
/* Save the mask. */
err |= __put_user(set->sig[0], &frame->sc.oldmask);
--
1.8.3.2
- [Qemu-devel] [PATCH 1/6] cris: Add a CRISv32 default "any" CPU for user mode emulation, (continued)
- [Qemu-devel] [PATCH 1/6] cris: Add a CRISv32 default "any" CPU for user mode emulation, edgar . iglesias, 2014/02/01
- [Qemu-devel] [PATCH 2/6] cris: Abort when a v10 takes interrupts while in a delayslot, edgar . iglesias, 2014/02/01
- [Qemu-devel] [PATCH 3/6] cris: Add interrupt signals to the CPU device, edgar . iglesias, 2014/02/01
- [Qemu-devel] [PATCH 4/6] axis-dev88: Connect the PIC upstream IRQs directly to the CPU, edgar . iglesias, 2014/02/01
- [Qemu-devel] [PATCH 6/6] linux-user: Fix trampoline code for CRIS,
edgar . iglesias <=
- [Qemu-devel] [PATCH 5/6] cris: Remove the CRIS PIC glue, edgar . iglesias, 2014/02/01