- 15 3月, 2011 1 次提交
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由 David Daney 提交于
GCC-4.6 can find more unused code than previous versions could. In the case of protected_restore_fp_context{,32}, the variable tmp is really used. Its use is tricky in that we really care about the side effects of the __put_user() calls. So we must mark tmp with __maybe_unused to quiet the warning. Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com> To: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2035/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 18 10月, 2010 3 次提交
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由 Al Viro 提交于
o32 compat does the right thing, native and n32 compat do not... Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk> Cc: linux-kernel@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/1700/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Al Viro 提交于
Put the original syscall number into ->regs[0] when we leave syscall with error. Use it in restart logics. Everything else will have it 0 since we pass through SAVE_SOME on all the ways in. Note that in places like bad_stack and inllegal_syscall we leave it 0 - it's not restartable. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk> Cc: linux-kernel@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1698/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk> Cc: linux-kernel@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1696/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 13 4月, 2010 1 次提交
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由 David Daney 提交于
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: NDavid Daney <ddaney@caviumnetworks.com> To: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/974/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 17 12月, 2009 1 次提交
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由 Ralf Baechle 提交于
Signed-off-by: NRalf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/709/
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- 09 9月, 2009 1 次提交
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由 David Howells 提交于
Add #inclusions of linux/tracehook.h to those arch files that had the tracehook call for TIF_NOTIFY_RESUME added when support for that flag was added to that arch. Signed-off-by: NDavid Howells <dhowells@redhat.com> Signed-off-by: NJames Morris <jmorris@namei.org>
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- 02 9月, 2009 2 次提交
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由 David Howells 提交于
Add a keyctl to install a process's session keyring onto its parent. This replaces the parent's session keyring. Because the COW credential code does not permit one process to change another process's credentials directly, the change is deferred until userspace next starts executing again. Normally this will be after a wait*() syscall. To support this, three new security hooks have been provided: cred_alloc_blank() to allocate unset security creds, cred_transfer() to fill in the blank security creds and key_session_to_parent() - which asks the LSM if the process may replace its parent's session keyring. The replacement may only happen if the process has the same ownership details as its parent, and the process has LINK permission on the session keyring, and the session keyring is owned by the process, and the LSM permits it. Note that this requires alteration to each architecture's notify_resume path. This has been done for all arches barring blackfin, m68k* and xtensa, all of which need assembly alteration to support TIF_NOTIFY_RESUME. This allows the replacement to be performed at the point the parent process resumes userspace execution. This allows the userspace AFS pioctl emulation to fully emulate newpag() and the VIOCSETTOK and VIOCSETTOK2 pioctls, all of which require the ability to alter the parent process's PAG membership. However, since kAFS doesn't use PAGs per se, but rather dumps the keys into the session keyring, the session keyring of the parent must be replaced if, for example, VIOCSETTOK is passed the newpag flag. This can be tested with the following program: #include <stdio.h> #include <stdlib.h> #include <keyutils.h> #define KEYCTL_SESSION_TO_PARENT 18 #define OSERROR(X, S) do { if ((long)(X) == -1) { perror(S); exit(1); } } while(0) int main(int argc, char **argv) { key_serial_t keyring, key; long ret; keyring = keyctl_join_session_keyring(argv[1]); OSERROR(keyring, "keyctl_join_session_keyring"); key = add_key("user", "a", "b", 1, keyring); OSERROR(key, "add_key"); ret = keyctl(KEYCTL_SESSION_TO_PARENT); OSERROR(ret, "KEYCTL_SESSION_TO_PARENT"); return 0; } Compiled and linked with -lkeyutils, you should see something like: [dhowells@andromeda ~]$ keyctl show Session Keyring -3 --alswrv 4043 4043 keyring: _ses 355907932 --alswrv 4043 -1 \_ keyring: _uid.4043 [dhowells@andromeda ~]$ /tmp/newpag [dhowells@andromeda ~]$ keyctl show Session Keyring -3 --alswrv 4043 4043 keyring: _ses 1055658746 --alswrv 4043 4043 \_ user: a [dhowells@andromeda ~]$ /tmp/newpag hello [dhowells@andromeda ~]$ keyctl show Session Keyring -3 --alswrv 4043 4043 keyring: hello 340417692 --alswrv 4043 4043 \_ user: a Where the test program creates a new session keyring, sticks a user key named 'a' into it and then installs it on its parent. Signed-off-by: NDavid Howells <dhowells@redhat.com> Signed-off-by: NJames Morris <jmorris@namei.org>
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由 David Howells 提交于
Implement TIF_NOTIFY_RESUME for most of those architectures in which isn't yet available, and, whilst we're at it, have it call the appropriate tracehook. After this patch, blackfin, m68k* and xtensa still lack support and need alteration of assembly code to make it work. Resume notification can then be used (by a later patch) to install a new session keyring on the parent of a process. Signed-off-by: NDavid Howells <dhowells@redhat.com> Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk> cc: linux-arch@vger.kernel.org Signed-off-by: NJames Morris <jmorris@namei.org>
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- 28 2月, 2009 1 次提交
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由 Ralf Baechle 提交于
Thanks to David Daney helping with debugging and testing. Signed-off-by: NRalf Baechle <ralf@linux-mips.org> Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com>
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- 12 10月, 2007 1 次提交
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由 Ralf Baechle 提交于
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 09 5月, 2007 1 次提交
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由 Randy Dunlap 提交于
Remove includes of <linux/smp_lock.h> where it is not used/needed. Suggested by Al Viro. Builds cleanly on x86_64, i386, alpha, ia64, powerpc, sparc, sparc64, and arm (all 59 defconfigs). Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 20 4月, 2007 2 次提交
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由 Atsushi Nemoto 提交于
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: NAtsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Atsushi Nemoto 提交于
The commit 4d40bff7110e9e1a97ff8c01bdd6350e9867cc10 ("Allow CpU exception in kernel partially") was broken. The commit was to fix theoretical problem but broke usual case. Revert it for now. Signed-off-by: NAtsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 17 3月, 2007 2 次提交
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由 Atsushi Nemoto 提交于
Signed-off-by: NAtsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Atsushi Nemoto 提交于
Commit 6d667106 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: NAtsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 22 2月, 2007 1 次提交
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由 Franck Bui-Huu 提交于
This patch adds trivial support for SMARTMIPS extension. This extension is currently implemented by 4KS[CD] CPUs. Basically it saves/restores ACX register, which is part of the SMARTMIPS ASE, when needed. This patch does *not* add any support for Smartmips MMU features. Futhermore this patch does not add explicit support for 4KS[CD] CPUs since they are respectively mips32 and mips32r2 compliant. So with the current processor configuration, a platform that has such CPUs needs to select both configs: CPU_HAS_SMARTMIPS SYS_HAS_CPU_MIPS32_R[12] This is due to the processor configuration which is mixing up all the architecture variants and the processor types. The drawback of this, is that we currently pass '-march=mips32' option to gcc when building a kernel instead of '-march=4ksc' for 4KSC case. This can lead to a kernel image a little bit bigger than required. Signed-off-by: NFranck Bui-Huu <fbuihuu@gmail.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 19 2月, 2007 1 次提交
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由 Ralf Baechle 提交于
native and compat do_signal and handle_signal are identical and can easily be unified. Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 14 2月, 2007 2 次提交
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由 Franck Bui-Huu 提交于
Signed-off-by: NFranck Bui-Huu <fbuihuu@gmail.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Ralf Baechle 提交于
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 11 2月, 2007 6 次提交
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由 Franck Bui-Huu 提交于
Signed-off-by: NFranck Bui-Huu <fbuihuu@gmail.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Franck Bui-Huu 提交于
This macro was used to save static registers before calling sys_sigsuspend() and sys_sigreturn(). For the sys_sigreturn() case, there's no point to save them since they have been already saved by setup_sigcontext() before calling the signal handler. For the sys_sigsuspend() case, I don't see any reasons... Signed-off-by: NFranck Bui-Huu <fbuihuu@gmail.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Franck Bui-Huu 提交于
Signed-off-by: NFranck Bui-Huu <fbuihuu@gmail.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Franck Bui-Huu 提交于
Signed-off-by: NFranck Bui-Huu <fbuihuu@gmail.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Franck Bui-Huu 提交于
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: NFranck Bui-Huu <fbuihuu@gmail.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Franck Bui-Huu 提交于
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: NFranck Bui-Huu <fbuihuu@gmail.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 07 2月, 2007 1 次提交
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由 Ralf Baechle 提交于
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 27 9月, 2006 3 次提交
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由 Ralf Baechle 提交于
In entry.S resume_userspace ... jal do_notify_resume form a loop through which the kernel will iterate as long as work is pending. If we iterate through this loop more than once with no signal pending for at least one but the last iteration we will take do the syscall restarting multiple times resulting in a syscall return prior to the the syscall instruction in userspace. This may happen when debugging a multithreaded program. Debugging and original fix by Maciej; extended to other ABIs by me. Signed-off-by: NMaciej W. Rozycki <macro@mips.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Ralf Baechle 提交于
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Ralf Baechle 提交于
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 01 7月, 2006 1 次提交
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由 Jörn Engel 提交于
Signed-off-by: NJörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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- 21 3月, 2006 1 次提交
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由 Atsushi Nemoto 提交于
Move function prototypes to asm/signal.h to detect trivial errors and add some __user tags to get rid of sparse warnings. Generated code should not be changed. Signed-off-by: NAtsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 09 2月, 2006 2 次提交
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由 Ralf Baechle 提交于
It's return value is ignored everywhere. Signed-off-by: NRalf Baechle <ralf@linux-mips.org> ---
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由 Ralf Baechle 提交于
Signed-off-by: NRalf Baechle <ralf@linux-mips.org> ---
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- 07 2月, 2006 2 次提交
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由 Atsushi Nemoto 提交于
Signed-off-by: NAtsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Atsushi Nemoto 提交于
Signed-off-by: NAtsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 01 12月, 2005 1 次提交
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由 Ralf Baechle 提交于
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 08 11月, 2005 1 次提交
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由 Atsushi Nemoto 提交于
Since 2.6.13-rc1 setup_frame and its variants return int. But some bits were missed in the conversion. Signed-off-by: NAtsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 30 10月, 2005 2 次提交
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由 Ralf Baechle 提交于
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Ralf Baechle 提交于
causing some headache for debuggers knowing about signal frames. Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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