[PATCH v6 01/20] arm64: ilp32: add documentation on the ILP32 ABI for ARM64
STALE3923d
From: Yury Norov <hidden>
Date: 2015-12-15 21:43:28
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Jonathan Corbet, Linus Torvalds
Revision v6 of 16 in this series.
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Based on Andrew Pinski's patch-series. Signed-off-by: Yury Norov <redacted> --- 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. +
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