[PATCH 08/23] arm64: ilp32: add documentation on the ILP32 ABI for ARM64
From: Yury Norov <hidden>
Date: 2016-05-24 00:05:43
Also in:
linux-arch, linux-s390, lkml
Subsystem:
documentation, the rest · Maintainers:
Jonathan Corbet, Linus Torvalds
Based on Andrew Pinski's patch-series. Signed-off-by: Yury Norov <redacted> --- Documentation/arm64/ilp32.txt | 25 +++++++++++++++++++++++++ 1 file changed, 25 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..8e74d67
--- /dev/null
+++ b/Documentation/arm64/ilp32.txt@@ -0,0 +1,25 @@ +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. Next syscalls are affected: +fadvise64_64, +fallocate, +ftruncate, +lookup_dcookie, +pread64, +pwrite64, +readahead, +shmat, +sync_file_range, +truncate, +lseek, +mmap + +struct rt_sigframe is redefined and contains struct compat_siginfo, +as compat syscalls expects, and struct ilp32_sigframe, to handle +AARCH64 register set and 32-bit userspace register representation. +
--
2.5.0