linux-toradex.git/arch/mips/kernel/signal-common.h, branch v3.4.99 Linux kernel for Apalis and Colibri modules MIPS: Move signal trampolines off of the stack. 2010-04-12T16:26:15+00:00 David Daney ddaney@caviumnetworks.com 2010-02-19T00:13:05+00:00 d814c28ceca8f659c0012eaec8e21eee43710716 This is a follow on to the vdso patch. Since all processes now have signal trampolines permanently mapped, we can use those instead of putting the trampoline on the stack and invalidating the corresponding icache across all CPUs. We also get rid of a bunch of ICACHE_REFILLS_WORKAROUND_WAR code. [Ralf: GDB 7.1 which has the necessary modifications to allow backtracing over signal frames will supposedly be released tomorrow. The old signal frame format obsoleted by this patch exists in two variations, for sane processors and for those requiring ICACHE_REFILLS_WORKAROUND_WAR. So there was never a GDB which did support backtracing over signal frames on all MIPS systems. This convinved me this series should be applied and pushed upstream as soon as possible.] Signed-off-by: David Daney <ddaney@caviumnetworks.com> To: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/974/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> 
This is a follow on to the vdso patch.

Since all processes now have signal trampolines permanently mapped, we
can use those instead of putting the trampoline on the stack and
invalidating the corresponding icache across all CPUs.  We also get rid
of a bunch of ICACHE_REFILLS_WORKAROUND_WAR code.

[Ralf: GDB 7.1 which has the necessary modifications to allow backtracing
over signal frames will supposedly be released tomorrow.  The old signal
frame format obsoleted by this patch exists in two variations, for sane
processors and for those requiring ICACHE_REFILLS_WORKAROUND_WAR.  So
there was never a GDB which did support backtracing over signal frames
on all MIPS systems.  This convinved me this series should be applied and
pushed upstream as soon as possible.]

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/974/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
[MIPS] replace remaining __FUNCTION__ occurrences 2008-04-28T16:14:27+00:00 Harvey Harrison harvey.harrison@gmail.com 2008-03-28T21:34:39+00:00 bb09a954b64c61b691c095e0a20708265b5bc2bc __FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> 
__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
[MIPS] Retry {save,restore}_fp_context if failed in atomic context. 2007-04-20T13:58:37+00:00 Atsushi Nemoto anemo@mba.ocn.ne.jp 2007-04-16T14:19:44+00:00 faea62346444ce5b1dba8fb5291d95b676522c42 The save_fp_context()/restore_fp_context() might sleep on accessing user stack and therefore might lose FPU ownership in middle of them. If these function failed due to "in_atomic" test in do_page_fault, touch the sigcontext area in non-atomic context and retry these save/restore operation. This is a replacement of a (broken) fix which was titled "Allow CpU exception in kernel partially". Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> 
The save_fp_context()/restore_fp_context() might sleep on accessing
user stack and therefore might lose FPU ownership in middle of them.

If these function failed due to "in_atomic" test in do_page_fault,
touch the sigcontext area in non-atomic context and retry these
save/restore operation.

This is a replacement of a (broken) fix which was titled "Allow CpU
exception in kernel partially".

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
[MIPS] Check FCSR for pending interrupts, alternative version 2007-03-17T01:03:25+00:00 Atsushi Nemoto anemo@mba.ocn.ne.jp 2007-03-09T16:03:48+00:00 c6a2f4679331206ef5d353fc9a6cda2fa4aef8c6 Commit 6d6671066a311703bca1b91645bb1e04cc983387 is incomplete and misses non-r4k CPUs. This patch reverts the commit and fixes in other way. o Do FCSR checking in caller of restore_fp_context. o Send SIGFPE if the signal handler set any FPU exception bits. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> 
Commit 6d6671066a311703bca1b91645bb1e04cc983387 is incomplete and misses
non-r4k CPUs.  This patch reverts the commit and fixes in other way.

 o Do FCSR checking in caller of restore_fp_context.
 o Send SIGFPE if the signal handler set any FPU exception bits.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
[MIPS] signals: make common _BLOCKABLE macro 2007-02-13T22:40:51+00:00 Franck Bui-Huu fbuihuu@gmail.com 2007-02-09T15:07:37+00:00 24c556e99ec8a61ce1fbc75bee61dc19edf2c4df Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> 
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
[MIPS] signal: Move sigframe definition for native O32/N64 into signal.c 2007-02-13T22:40:50+00:00 Ralf Baechle ralf@linux-mips.org 2007-02-13T01:31:48+00:00 66680583461d7cae281cef63c050c9b6371e3286 Signed-off-by: Ralf Baechle <ralf@linux-mips.org> 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
[MIPS] signal: Move {restore,setup}_sigcontext prototypes to their user 2007-02-13T22:40:50+00:00 Ralf Baechle ralf@linux-mips.org 2007-02-13T01:28:09+00:00 205d84aaea380bbd1cc1079d44086cd50c2c2dad Signed-off-by: Ralf Baechle <ralf@linux-mips.org> 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
[MIPS] signal: factorize debug code 2007-02-10T22:38:46+00:00 Franck Bui-Huu fbuihuu@gmail.com 2007-02-05T14:24:24+00:00 722bb63de630f9500db1f12ed32e1dd9349a8049 Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> 
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
[MIPS] signal: clean up sigframe structure 2007-02-10T22:38:45+00:00 Franck Bui-Huu fbuihuu@gmail.com 2007-02-05T14:24:21+00:00 c0b9bae9d18980afa1797fb7b75adb4fbc837b66 This patch makes 'struct sigframe' declaration avalaible for all signals code. It allows signal32 to not have its own declaration. This patch also removes all ICACHE_REFILLS_WORKAROUND_WAR tests in structure declaration and hopefully make them more readable. Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> 
This patch makes 'struct sigframe' declaration avalaible for all signals
code. It allows signal32 to not have its own declaration.

This patch also removes all ICACHE_REFILLS_WORKAROUND_WAR tests in
structure declaration and hopefully make them more readable.

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
[MIPS] signal: do not inline functions in signal-common.h 2007-02-10T22:38:45+00:00 Franck Bui-Huu fbuihuu@gmail.com 2007-02-05T14:24:20+00:00 c3fc4ab36d495f50ccc89986fe32eeabc2549fa1 These functions are quite big and there are no points to make them inlined. So this patch moves the functions implementation in signal.c and make them available for others source files which need them. Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> 
These functions are quite big and there are no points to make
them inlined. So this patch moves the functions implementation
in signal.c and make them available for others source files
which need them.

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>