[PATCH] syscall(2): note parisc handling of aligned register pairs
From: Mike Frysinger <hidden>
Date: 2017-03-11 21:04:38
Subsystem:
the rest · Maintainer:
Linus Torvalds
While parisc would normally have the same behavior as ARM/PowerPC, they decide to write shim syscall stubs to unpack/realign rather than expose the padding to userspace. Signed-off-by: Mike Frysinger <redacted> --- man2/syscall.2 | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/man2/syscall.2 b/man2/syscall.2
index f8c89b84356d..b55540e039b7 100644
--- a/man2/syscall.2
+++ b/man2/syscall.2@@ -133,6 +133,10 @@ on PowerPC with the 32-bit ABI, and on Xtensa. .\" Mike Frysinger: this issue ends up forcing MIPS .\" O32 to take 7 arguments to syscall() +.\" See arch/parisc/kernel/sys_parisc.c. +Note that while the parisc C ABI also uses aligned register pairs, +it uses a shim layer to hide the issue from userspace. + The affected system calls are .BR fadvise64_64 (2), .BR ftruncate64 (2),
--
2.12.0
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