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[Qemu-devel] [PULL 03/26] linux-user: Fix endianess of aarch64 signal tr
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PULL 03/26] linux-user: Fix endianess of aarch64 signal trampoline |
Date: |
Thu, 11 Jan 2018 13:37:59 +0000 |
From: Michael Weiser <address@hidden>
Since for aarch64 the signal trampoline is synthesized directly into the
signal frame we need to make sure the instructions end up little-endian.
Otherwise the wrong endianness will cause a SIGILL upon return from the
signal handler on big-endian targets.
Signed-off-by: Michael Weiser <address@hidden>
Reviewed-by: Richard Henderson <address@hidden>
Message-id: address@hidden
Signed-off-by: Peter Maydell <address@hidden>
---
linux-user/signal.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/linux-user/signal.c b/linux-user/signal.c
index 74fa03f..f85f0dd 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -1599,9 +1599,13 @@ static void target_setup_frame(int usig, struct
target_sigaction *ka,
if (ka->sa_flags & TARGET_SA_RESTORER) {
return_addr = ka->sa_restorer;
} else {
- /* mov x8,#__NR_rt_sigreturn; svc #0 */
- __put_user(0xd2801168, &frame->tramp[0]);
- __put_user(0xd4000001, &frame->tramp[1]);
+ /*
+ * mov x8,#__NR_rt_sigreturn; svc #0
+ * Since these are instructions they need to be put as little-endian
+ * regardless of target default or current CPU endianness.
+ */
+ __put_user_e(0xd2801168, &frame->tramp[0], le);
+ __put_user_e(0xd4000001, &frame->tramp[1], le);
return_addr = frame_addr + offsetof(struct target_rt_sigframe, tramp);
}
env->xregs[0] = usig;
--
2.7.4
- [Qemu-devel] [PULL 00/26] target-arm queue, Peter Maydell, 2018/01/11
- [Qemu-devel] [PULL 08/26] target/arm: Fix stlxp for aarch64_be, Peter Maydell, 2018/01/11
- [Qemu-devel] [PULL 11/26] imx_fec: Refactor imx_eth_enable_rx(), Peter Maydell, 2018/01/11
- [Qemu-devel] [PULL 09/26] Virt: ACPI: fix qemu assert due to re-assigned table data address, Peter Maydell, 2018/01/11
- [Qemu-devel] [PULL 05/26] linux-user: Add aarch64_be magic numbers to qemu-binfmt-conf.sh, Peter Maydell, 2018/01/11
- [Qemu-devel] [PULL 13/26] imx_fec: Move Tx frame buffer away from the stack, Peter Maydell, 2018/01/11
- [Qemu-devel] [PULL 04/26] configure: Add aarch64_be-linux-user target, Peter Maydell, 2018/01/11
- [Qemu-devel] [PULL 01/26] linux-user: Add support for big-endian aarch64, Peter Maydell, 2018/01/11
- [Qemu-devel] [PULL 18/26] imx_fec: Use correct length for packet size, Peter Maydell, 2018/01/11
- [Qemu-devel] [PULL 10/26] imx_fec: Do not link to netdev, Peter Maydell, 2018/01/11
- [Qemu-devel] [PULL 03/26] linux-user: Fix endianess of aarch64 signal trampoline,
Peter Maydell <=
- [Qemu-devel] [PULL 12/26] imx_fec: Change queue flushing heuristics, Peter Maydell, 2018/01/11
- [Qemu-devel] [PULL 19/26] imx_fec: Fix a typo in imx_enet_receive(), Peter Maydell, 2018/01/11
- [Qemu-devel] [PULL 15/26] imx_fec: Use MIN instead of explicit ternary operator, Peter Maydell, 2018/01/11
- [Qemu-devel] [PULL 14/26] imx_fec: Use ENET_FTRL to determine truncation length, Peter Maydell, 2018/01/11
- [Qemu-devel] [PULL 16/26] imx_fec: Emulate SHIFT16 in ENETx_RACC, Peter Maydell, 2018/01/11
- [Qemu-devel] [PULL 07/26] linux-user: Activate armeb handler registration, Peter Maydell, 2018/01/11
- [Qemu-devel] [PULL 06/26] linux-user: Separate binfmt arm CPU families, Peter Maydell, 2018/01/11
- [Qemu-devel] [PULL 21/26] hw/timer/pxa2xx_timer: replace hw_error() -> qemu_log_mask(), Peter Maydell, 2018/01/11
- [Qemu-devel] [PULL 24/26] target/arm: Make disas_thumb2_insn() generate its own UNDEF exceptions, Peter Maydell, 2018/01/11
- [Qemu-devel] [PULL 20/26] imx_fec: Reserve full FSL_IMX25_FEC_SIZE page for the register file, Peter Maydell, 2018/01/11