From: Laurent Vivier <laurent@vivier.eu>
To: qemu-devel@nongnu.org
Cc: "Richard Henderson" <richard.henderson@linaro.org>,
"Riku Voipio" <riku.voipio@iki.fi>,
"Mark Cave-Ayland" <mark.cave-ayland@ilande.co.uk>,
"Laurent Vivier" <laurent@vivier.eu>,
"Alex Bennée" <alex.bennee@linaro.org>,
"Artyom Tarasenko" <atar4qemu@gmail.com>
Subject: [PULL v2 13/13] linux-user/alpha: Set r20 secondary return value
Date: Wed, 6 Nov 2019 14:04:56 +0100 [thread overview]
Message-ID: <20191106130456.6176-14-laurent@vivier.eu> (raw)
In-Reply-To: <20191106130456.6176-1-laurent@vivier.eu>
From: Richard Henderson <richard.henderson@linaro.org>
This value is not, as far as I know, used by any linux software,
but it is set by the kernel and is part of the ABI.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20191106113318.10226-13-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
---
linux-user/alpha/target_cpu.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/linux-user/alpha/target_cpu.h b/linux-user/alpha/target_cpu.h
index dd25e18f47fb..ad408ab5cc8e 100644
--- a/linux-user/alpha/target_cpu.h
+++ b/linux-user/alpha/target_cpu.h
@@ -27,10 +27,19 @@ static inline void cpu_clone_regs_child(CPUAlphaState *env, target_ulong newsp,
}
env->ir[IR_V0] = 0;
env->ir[IR_A3] = 0;
+ env->ir[IR_A4] = 1; /* OSF/1 secondary return: child */
}
static inline void cpu_clone_regs_parent(CPUAlphaState *env, unsigned flags)
{
+ /*
+ * OSF/1 secondary return: parent
+ * Note that the kernel does not do this if SETTLS, because the
+ * settls argument register is still live after copy_thread.
+ */
+ if (!(flags & CLONE_SETTLS)) {
+ env->ir[IR_A4] = 0;
+ }
}
static inline void cpu_set_tls(CPUAlphaState *env, target_ulong newtls)
--
2.21.0
next prev parent reply other threads:[~2019-11-06 13:13 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-06 13:04 [PULL v2 00/13] Linux user for 4.2 patches Laurent Vivier
2019-11-06 13:04 ` [PULL v2 01/13] linux-user: Support for NETLINK socket options Laurent Vivier
2019-11-12 10:11 ` Peter Maydell
2019-11-12 10:30 ` Laurent Vivier
2019-11-06 13:04 ` [PULL v2 02/13] scripts/qemu-binfmt-conf: Update for sparc64 Laurent Vivier
2019-11-06 13:04 ` [PULL v2 03/13] tests/tcg/multiarch/linux-test: Fix error check for shmat Laurent Vivier
2019-11-06 13:04 ` [PULL v2 04/13] target/sparc: Define an enumeration for accessing env->regwptr Laurent Vivier
2019-11-06 13:04 ` [PULL v2 05/13] linux-user/sparc: Use WREG constants in sparc/target_cpu.h Laurent Vivier
2019-11-06 13:04 ` [PULL v2 06/13] linux-user/sparc: Begin using WREG constants in sparc/signal.c Laurent Vivier
2019-11-06 13:04 ` [PULL v2 07/13] linux-user/sparc: Use WREG_SP constant " Laurent Vivier
2019-11-06 13:04 ` [PULL v2 08/13] linux-user/sparc: Fix WREG usage in setup_frame Laurent Vivier
2019-11-06 13:04 ` [PULL v2 09/13] linux-user/sparc64: Fix target_signal_frame Laurent Vivier
2019-11-06 13:04 ` [PULL v2 10/13] linux-user: Rename cpu_clone_regs to cpu_clone_regs_child Laurent Vivier
2019-11-06 13:04 ` [PULL v2 11/13] linux-user: Introduce cpu_clone_regs_parent Laurent Vivier
2019-11-06 13:04 ` [PULL v2 12/13] linux-user/sparc: Fix cpu_clone_regs_* Laurent Vivier
2019-11-06 13:04 ` Laurent Vivier [this message]
2019-11-06 19:10 ` [PULL v2 00/13] Linux user for 4.2 patches no-reply
2019-11-06 22:04 ` Peter Maydell
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