linux-kernel - [PATCH v6 01/21] arm64: ilp32: add documentation on the ILP32 ABI for ARM64

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Message-ID: <1452792198-10718-2-git-send-email-ynorov@caviumnetworks.com>
Date:	Thu, 14 Jan 2016 20:22:58 +0300
From:	Yury Norov <ynorov@...iumnetworks.com>
To:	<arnd@...db.de>, <catalin.marinas@....com>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
CC:	<schwidefsky@...ibm.com>, <heiko.carstens@...ibm.com>,
	<ynorov@...iumnetworks.com>, <pinskia@...il.com>,
	<Prasun.Kapoor@...iumnetworks.com>, <schwab@...e.de>,
	<Nathan_Lynch@...tor.com>, <agraf@...e.de>,
	<klimov.linux@...il.com>, <broonie@...nel.org>,
	<jan.dakinevich@...il.com>, <joseph@...esourcery.com>,
	<christoph.muellner@...obroma-systems.com>
Subject: [PATCH v6 01/21] arm64: ilp32: add documentation on the ILP32 ABI for ARM64

Based on Andrew Pinski's patch-series.

Signed-off-by: Yury Norov <ynorov@...iumnetworks.com>
---
 Documentation/arm64/ilp32.txt | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 Documentation/arm64/ilp32.txt

diff --git a/Documentation/arm64/ilp32.txt b/Documentation/arm64/ilp32.txt
new file mode 100644
index 0000000..d14af62
--- /dev/null
+++ b/Documentation/arm64/ilp32.txt
@@ -0,0 +1,13 @@
+ILP32 AARCH64 SYSCALL ABI
+=========================
+
+This document describes the ILP32 syscall ABI and where it differs
+from the generic compat linux syscall interface.
+
+Syscalls which normally would pass 64bit values as two arguments;
+now pass the 64bit value as one argument.
+
+struct rt_sigframe is redefined and contains struct compat_siginfo,
+as compat syscalls expects, and struct sigframe, taken from lp64 to
+handle AARCH64 register set.
+
-- 
2.5.0