linux-toradex.git/arch/arm/lib/putuser.S, branch v3.3.5

ARM: 7301/1: Rename the T() macro to TUSER() to avoid namespace conflicts

2012-01-25T11:07:40+00:00

This macro is used to generate unprivileged accesses (LDRT/STRT) to user
space.

Signed-off-by: Catalin Marinas 
Acked-by: Nicolas Pitre 
Signed-off-by: Russell King

ARM: 6384/1: Remove the domain switching on ARMv6k/v7 CPUs

2010-11-04T15:44:31+00:00

This patch removes the domain switching functionality via the set_fs and
__switch_to functions on cores that have a TLS register.

Currently, the ioremap and vmalloc areas share the same level 1 page
tables and therefore have the same domain (DOMAIN_KERNEL). When the
kernel domain is modified from Client to Manager (via the __set_fs or in
the __switch_to function), the XN (eXecute Never) bit is overridden and
newer CPUs can speculatively prefetch the ioremap'ed memory.

Linux performs the kernel domain switching to allow user-specific
functions (copy_to/from_user, get/put_user etc.) to access kernel
memory. In order for these functions to work with the kernel domain set
to Client, the patch modifies the LDRT/STRT and related instructions to
the LDR/STR ones.

The user pages access rights are also modified for kernel read-only
access rather than read/write so that the copy-on-write mechanism still
works. CPU_USE_DOMAINS gets disabled only if the hardware has a TLS register
(CPU_32v6K is defined) since writing the TLS value to the high vectors page
isn't possible.

The user addresses passed to the kernel are checked by the access_ok()
function so that they do not point to the kernel space.

Tested-by: Anton Vorontsov 
Cc: Tony Lindgren 
Signed-off-by: Catalin Marinas 
Signed-off-by: Russell King

ARM: fix build error in arch/arm/kernel/process.c

2010-04-21T07:45:21+00:00

/tmp/ccJ3ssZW.s: Assembler messages:
/tmp/ccJ3ssZW.s:1952: Error: can't resolve `.text' {.text section} - `.LFB1077'

This is caused because:

	.section .data
	.section .text
	.section .text
	.previous

does not return us to the .text section, but the .data section; this
makes use of .previous dangerous if the ordering of previous sections
is not known.

Fix up the other users of .previous; .pushsection and .popsection are
a safer pairing to use than .section and .previous.

Signed-off-by: Russell King

Thumb-2: Implement the unified arch/arm/lib functions

2009-07-24T11:32:57+00:00

This patch adds the ARM/Thumb-2 unified support for the arch/arm/lib/*
files.

Signed-off-by: Catalin Marinas

[ARM] 5227/1: Add the ENDPROC declarations to the .S files

2008-09-01T11:06:34+00:00

This declaration specifies the "function" type and size for various
assembly functions, mainly needed for generating the correct branch
instructions in Thumb-2.

Signed-off-by: Catalin Marinas 
Signed-off-by: Russell King

[ARM] move include/asm-arm to arch/arm/include/asm

2008-08-02T20:32:35+00:00

Move platform independent header files to arch/arm/include/asm, leaving
those in asm/arch* and asm/plat* alone.

Signed-off-by: Russell King

[ARM] getuser.S and putuser.S don't need thread_info.h nor asm-offsets.h

2007-04-21T19:35:22+00:00

Signed-off-by: Russell King

kbuild: arm - use generic asm-offsets.h support

2005-09-09T19:08:59+00:00

Delete obsoleted stuff from arch Makefile and rename
constants.h to asm-offsets.h

Signed-off-by: Sam Ravnborg

Linux-2.6.12-rc2

2005-04-16T22:20:36+00:00

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!