From: Peter Maydell <peter.maydell@linaro.org>
To: qemu-arm@nongnu.org, qemu-devel@nongnu.org
Cc: Riku Voipio <riku.voipio@iki.fi>, Laurent Vivier <laurent@vivier.eu>
Subject: [PATCH] linux-user/arm/signal.c: Drop TARGET_CONFIG_CPU_32
Date: Mon, 18 May 2020 15:30:14 +0100 [thread overview]
Message-ID: <20200518143014.20689-1-peter.maydell@linaro.org> (raw)
The Arm signal-handling code has some parts ifdeffed with a
TARGET_CONFIG_CPU_32, which is always defined. This is a leftover
from when this code's structure was based on the Linux kernel
signal handling code, where it was intended to support 26-bit
Arm CPUs. The kernel dropped its CONFIG_CPU_32 in kernel commit
4da8b8208eded0ba21e3 in 2009.
QEMU has never had 26-bit CPU support and is unlikely to ever
add it; we certainly aren't going to support 26-bit Linux
binaries via linux-user mode. The ifdef is just unhelpful
noise, so remove it entirely.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
Based-on: <20200518142801.20503-1-peter.maydell@linaro.org>
("[PATCH v2] target/arm: Allow user-mode code to write CPSR.E via MSR")
to avoid a textual conflict.
linux-user/arm/signal.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/linux-user/arm/signal.c b/linux-user/arm/signal.c
index 698985a647e..f21d1535e4d 100644
--- a/linux-user/arm/signal.c
+++ b/linux-user/arm/signal.c
@@ -126,8 +126,6 @@ struct rt_sigframe_v2
abi_ulong retcode[4];
};
-#define TARGET_CONFIG_CPU_32 1
-
/*
* For ARM syscalls, we encode the syscall number into the instruction.
*/
@@ -187,9 +185,7 @@ setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
__put_user(env->regs[13], &sc->arm_sp);
__put_user(env->regs[14], &sc->arm_lr);
__put_user(env->regs[15], &sc->arm_pc);
-#ifdef TARGET_CONFIG_CPU_32
__put_user(cpsr_read(env), &sc->arm_cpsr);
-#endif
__put_user(/* current->thread.trap_no */ 0, &sc->trap_no);
__put_user(/* current->thread.error_code */ 0, &sc->error_code);
@@ -549,11 +545,9 @@ restore_sigcontext(CPUARMState *env, struct target_sigcontext *sc)
__get_user(env->regs[13], &sc->arm_sp);
__get_user(env->regs[14], &sc->arm_lr);
__get_user(env->regs[15], &sc->arm_pc);
-#ifdef TARGET_CONFIG_CPU_32
__get_user(cpsr, &sc->arm_cpsr);
cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC, CPSRWriteByInstr);
arm_rebuild_hflags(env);
-#endif
err |= !valid_user_regs(env);
--
2.20.1
next reply other threads:[~2020-05-18 14:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-18 14:30 Peter Maydell [this message]
2020-05-19 15:02 ` [PATCH] linux-user/arm/signal.c: Drop TARGET_CONFIG_CPU_32 Richard Henderson
2020-05-21 17:05 ` Peter Maydell
2020-10-12 15:33 [PATCH 00/10] target/arm: Various v8.1M minor features Peter Maydell
2020-10-12 15:33 ` [PATCH] linux-user/arm/signal.c: Drop TARGET_CONFIG_CPU_32 Peter Maydell
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