From mboxrd@z Thu Jan 1 00:00:00 1970 From: ynorov@caviumnetworks.com (Yury Norov) Date: Wed, 16 Dec 2015 00:42:27 +0300 Subject: [PATCH v6 01/20] arm64: ilp32: add documentation on the ILP32 ABI for ARM64 In-Reply-To: <1450215766-14765-1-git-send-email-ynorov@caviumnetworks.com> References: <1450215766-14765-1-git-send-email-ynorov@caviumnetworks.com> Message-ID: <1450215766-14765-2-git-send-email-ynorov@caviumnetworks.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Based on Andrew Pinski's patch-series. Signed-off-by: Yury Norov --- Documentation/arm64/ilp32.txt | 17 +++++++++++++++++ 1 file changed, 17 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..ad3a48e --- /dev/null +++ b/Documentation/arm64/ilp32.txt @@ -0,0 +1,17 @@ +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. + +Syscalls openat and open_by_handle_at are as non-compat as, it's +temporary solution. There is expected global refactoring for all +platforms. + -- 2.5.0