Denys Vlasenko 1536bb46fa x86/asm/entry/32: Explain reloading of registers after __audit_syscall_entry() ...

Here it is not obvious why we load pt_regs->cx to %esi etc.
Lets improve comments.

Explain that here we combine two things: first, we reload
registers since some of them are clobbered by the C function we
just called; and we also convert 32-bit syscall params to 64-bit
C ABI, because we are going to jump back to syscall dispatch
code.

Move reloading of 6th argument into the macro instead of having
it after each of two macro invocations.

No actual code changes here.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Drewry <wad@chromium.org>
Link: http://lkml.kernel.org/r/1433876051-26604-2-git-send-email-dvlasenk@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2015-06-10 08:42:13 +02:00

..

alpha

Merge branch 'locking/core' into x86/core, to prepare for dependent patch

2015-06-03 10:07:35 +02:00

arc

ARC: inline cache flush toggle helpers

2015-05-11 11:21:41 +05:30

arm

Merge branch 'locking/core' into x86/core, to prepare for dependent patch

2015-06-03 10:07:35 +02:00

arm64

Merge branch 'locking/core' into x86/core, to prepare for dependent patch

2015-06-03 10:07:35 +02:00

avr32

arch: Remove __ARCH_HAVE_CMPXCHG

2015-05-13 10:55:42 +02:00

blackfin

Merge tag 'blackfin-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/realmz6/blackfin-linux

2015-04-24 07:58:07 -07:00

c6x

Merge tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming

2015-04-16 18:48:55 -04:00

cris

Merge tag 'cris-for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/jesper/cris

2015-04-26 13:31:05 -07:00

frv

Merge tag 'devicetree-for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

2015-04-24 08:46:18 -07:00

hexagon

arch: Remove __ARCH_HAVE_CMPXCHG

2015-05-13 10:55:42 +02:00

ia64

Merge branch 'locking/core' into x86/core, to prepare for dependent patch

2015-06-03 10:07:35 +02:00

m32r

Merge branch 'locking/core' into x86/core, to prepare for dependent patch

2015-06-03 10:07:35 +02:00

m68k

arch: Remove __ARCH_HAVE_CMPXCHG

2015-05-13 10:55:42 +02:00

metag

locking/arch: Rename set_mb() to smp_store_mb()

2015-05-19 08:32:00 +02:00

microblaze

microblaze: use asm-generic for seccomp.h

2015-04-17 09:04:10 -04:00

mips

Merge branch 'locking/core' into x86/core, to prepare for dependent patch

2015-06-03 10:07:35 +02:00

mn10300

Merge tag 'devicetree-for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

2015-04-24 08:46:18 -07:00

nios2

Merge tag 'nios2-v4.1-rc1' of git://git.rocketboards.org/linux-socfpga-next

2015-04-24 07:59:07 -07:00

openrisc

Merge branch 'akpm' (patches from Andrew)

2015-04-15 16:39:15 -07:00

parisc

Merge branch 'locking/core' into x86/core, to prepare for dependent patch

2015-06-03 10:07:35 +02:00

powerpc

Merge branch 'locking/core' into x86/core, to prepare for dependent patch

2015-06-03 10:07:35 +02:00

s390

Merge branch 'locking/core' into x86/core, to prepare for dependent patch

2015-06-03 10:07:35 +02:00

score

arch: Remove __ARCH_HAVE_CMPXCHG

2015-05-13 10:55:42 +02:00

sh

locking/arch: Rename set_mb() to smp_store_mb()

2015-05-19 08:32:00 +02:00

sparc

Merge branch 'locking/core' into x86/core, to prepare for dependent patch

2015-06-03 10:07:35 +02:00

tile

arch: Remove __ARCH_HAVE_CMPXCHG

2015-05-13 10:55:42 +02:00

um

Merge branch 'exec_domain_rip_v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc

2015-04-15 13:53:55 -07:00

unicore32

Merge branch 'exec_domain_rip_v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc

2015-04-15 13:53:55 -07:00

x86

x86/asm/entry/32: Explain reloading of registers after __audit_syscall_entry()

2015-06-10 08:42:13 +02:00

xtensa

xtensa: Provide dummy dma_alloc_attrs() and dma_free_attrs()

2015-05-25 23:03:16 +00:00

.gitignore

…

Kconfig

Merge tag 'powerpc-4.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux

2015-04-16 13:53:32 -05:00