- 21 12月, 2018 2 次提交
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由 Firoz Khan 提交于
PowerPC uses a syscall table with native and compat calls interleaved, which is a slightly simpler way to define two matching tables. As we move to having the tables generated, that advantage is no longer important, but the interleaved table gets in the way of using the same scripts as on the other archit- ectures. Split out a new compat_sys_call_table symbol that contains all the compat calls, and leave the main table for the nat- ive calls, to more closely match the method we use every- where else. Suggested-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NFiroz Khan <firoz.khan@linaro.org> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Firoz Khan 提交于
Move the macro definition for compat_sys_sigsuspend from asm/systbl.h to the file which it is getting included. One of the patch in this patch series is generating uapi header and syscall table files. In order to come up with a common implimentation across all architecture, we need to do this change. This change will simplify the implementation of system call table generation script and help to come up a common implementation across all architecture. Signed-off-by: NFiroz Khan <firoz.khan@linaro.org> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 10 5月, 2018 2 次提交
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由 Michael Ellerman 提交于
Currently the select system call is wired up with the SYSX_SPU() macro. The SYSX_SPU() is not handled by systbl_chk.c, which means the syscall number for select is not checked. That hides the fact that the syscall number for select is actually __NR__newselect not __NR_select. In a following patch we'd like to drop ppc32_select() which means select will become a regular COMPAT_SYS_SPU() syscall. But COMPAT_SYS_SPU() can't deal with the fact that the syscall number is actually __NR__newselect. We also can't just redefine __NR_select because that's still used for the old select call. So add a new COMPAT_NEW_SPU() that does the same thing as COMPAT_SYS_SPU() except it encodes that we're using the new number. Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk> [mpe: Update sys_ni.c for s/ppc_rtas/sys_rtas/] Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 31 8月, 2017 1 次提交
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由 Tobin C. Harding 提交于
.llong is an undocumented PPC specific directive. The generic equivalent is .quad, but even better (because it's self describing) is .8byte. Convert all .llong directives to .8byte. Signed-off-by: NTobin C. Harding <me@tobin.cc> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 28 3月, 2015 1 次提交
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由 Michael Ellerman 提交于
We currently have a "special" syscall for switching endianness. This is syscall number 0x1ebe, which is handled explicitly in the 64-bit syscall exception entry. That has a few problems, firstly the syscall number is outside of the usual range, which confuses various tools. For example strace doesn't recognise the syscall at all. Secondly it's handled explicitly as a special case in the syscall exception entry, which is complicated enough without it. As a first step toward removing the special syscall, we need to add a regular syscall that implements the same functionality. The logic is simple, it simply toggles the MSR_LE bit in the userspace MSR. This is the same as the special syscall, with the caveat that the special syscall clobbers fewer registers. This version clobbers r9-r12, XER, CTR, and CR0-1,5-7. Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
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- 28 7月, 2014 1 次提交
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由 Michael Ellerman 提交于
Currently we have sys_sigpending and sys_old_getrlimit defined to use COMPAT_SYS() in systbl.h, but then both are #defined to sys_ni_syscall in systbl.S. This seems to have been done when ppc and ppc64 were merged, in commit 9994a338 "Introduce entry_{32,64}.S, misc_{32,64}.S, systbl.S". AFAICS there's no longer (or never was) any need for this, we can just use SYSX() for both and remove the #defines to sys_ni_syscall. The expansion before was: #define COMPAT_SYS(func) .llong .sys_##func,.compat_sys_##func #define sys_old_getrlimit sys_ni_syscall COMPAT_SYS(old_getrlimit) => .llong .sys_old_getrlimit,.compat_sys_old_getrlimit => .llong .sys_ni_syscall,.compat_sys_old_getrlimit After is: #define SYSX(f, f3264, f32) .llong .f,.f3264 SYSX(sys_ni_syscall, compat_sys_old_getrlimit, sys_old_getrlimit) => .llong .sys_ni_syscall,.compat_sys_old_getrlimit ie. they are equivalent. Finally both COMPAT_SYS() and SYSX() evaluate to sys_ni_syscall in the Cell SPU code. Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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- 23 4月, 2014 2 次提交
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由 Anton Blanchard 提交于
There are a few places we have to use dot symbols with the current ABI - the syscall table and the kvm hcall table. Wrap both of these with a new macro called DOTSYM so it will be easy to transition away from dot symbols in a future ABI. Signed-off-by: NAnton Blanchard <anton@samba.org>
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由 Anton Blanchard 提交于
There is no need to create a function descriptor for the system call table. By using one we force the system call table into the text section and it really belongs in the rodata section. This also removes another use of dot symbols. Signed-off-by: NAnton Blanchard <anton@samba.org>
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- 11 10月, 2007 1 次提交
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由 Stephen Rothwell 提交于
Our _GLOBAL macro does a ".align 2" so the alignment is fine for 32 bit, but on 64 bit it is possible for it to end up only 4 byte aligned. I don't know if it matters, but it can't hurt to 8 byte align it. It also means that when we build with --emit_relocs, none of our 64 bit relocations are to misaligned places. Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: NPaul Mackerras <paulus@samba.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 6月, 2006 1 次提交
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由 Andreas Schwab 提交于
Avoid duplication of the syscall table for the cell platform. Based on an idea from David Woodhouse. Signed-off-by: NAndreas Schwab <schwab@suse.de> Acked-by: NArnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 24 5月, 2006 1 次提交
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由 David Woodhouse 提交于
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: NPaul Mackerras <paulus@samba.org> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 28 4月, 2006 1 次提交
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由 Andreas Schwab 提交于
Wire up *at syscalls. This patch has been tested on ppc64 (using glibc's testsuite, both 32bit and 64bit), and compile-tested for ppc32 (I have currently no ppc32 system available, but I expect no problems). Signed-off-by: NAndreas Schwab <schwab@suse.de> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 26 4月, 2006 1 次提交
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由 Jens Axboe 提交于
sys_splice() moves data to/from pipes with a file input/output. sys_vmsplice() moves data to a pipe, with the input being a user address range instead. This uses an approach suggested by Linus, where we can hold partial ranges inside the pages[] map. Hopefully this will be useful for network receive support as well. Signed-off-by: NJens Axboe <axboe@suse.de>
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- 21 4月, 2006 1 次提交
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由 Arnd Bergmann 提交于
Every time a new syscall gets added, a BUILD_BUG_ON in arch/powerpc/platforms/cell/spu_callbacks.c gets triggered. Since the addition of a new syscall is rather harmless, the error should just be removed. While we're here, add sys_tee to the list and add a comment to systbl.S to remind people that there is another list on powerpc. Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 11 4月, 2006 1 次提交
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由 Jens Axboe 提交于
Basically an in-kernel implementation of tee, which uses splice and the pipe buffers as an intelligent way to pass data around by reference. Where the user space tee consumes the input and produces a stdout and file output, this syscall merely duplicates the data inside a pipe to another pipe. No data is copied, the output just grabs a reference to the input pipe data. Signed-off-by: NJens Axboe <axboe@suse.de>
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- 03 4月, 2006 1 次提交
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由 Linus Torvalds 提交于
(We'd only added the number, which meant that actually trying to use splice just went off into la-la-land) Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 01 4月, 2006 1 次提交
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由 Paul Mackerras 提交于
Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 08 3月, 2006 1 次提交
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由 Paul Mackerras 提交于
A careful reading of the recent changes to the system call entry/exit paths revealed several problems, plus some things that could be simplified and improved: * 32-bit wasn't testing the _TIF_NOERROR bit in the syscall fast exit path, so it was only doing anything with it once it saw some other bit being set. In other words, the noerror behaviour would apply to the next system call where we had to reschedule or deliver a signal, which is not necessarily the current system call. * 32-bit wasn't doing the call to ptrace_notify in the syscall exit path when the _TIF_SINGLESTEP bit was set. * _TIF_RESTOREALL was in both _TIF_USER_WORK_MASK and _TIF_PERSYSCALL_MASK, which is odd since _TIF_RESTOREALL is only set by system calls. I took it out of _TIF_USER_WORK_MASK. * On 64-bit, _TIF_RESTOREALL wasn't causing the non-volatile registers to be restored (unless perhaps a signal was delivered or the syscall was traced or single-stepped). Thus the non-volatile registers weren't restored on exit from a signal handler. We probably got away with it mostly because signal handlers written in C wouldn't alter the non-volatile registers. * On 32-bit I simplified the code and made it more like 64-bit by making the syscall exit path jump to ret_from_except to handle preemption and signal delivery. * 32-bit was calling do_signal unnecessarily when _TIF_RESTOREALL was set - but I think because of that 32-bit was actually restoring the non-volatile registers on exit from a signal handler. * I changed the order of enabling interrupts and saving the non-volatile registers before calling do_syscall_trace_leave; now we enable interrupts first. Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 10 2月, 2006 2 次提交
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由 JANAK DESAI 提交于
Registers system call for the powerpc architecture. Signed-off-by: NJanak Desai <janak@us.ibm.com> Cc: Al Viro <viro@ftp.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Cc: Michael Kerrisk <mtk-manpages@gmx.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Andi Kleen <ak@muc.de> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Paul Mackerras 提交于
With this, new system calls only have to be wired up in one place for ARCH=ppc and ARCH=powerpc, rather than 2. Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 19 1月, 2006 1 次提交
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由 David Woodhouse 提交于
Implement the TIF_RESTORE_SIGMASK flag in the new arch/powerpc kernel, for both 32-bit and 64-bit system call paths. Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 11 1月, 2006 1 次提交
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由 Christoph Hellwig 提交于
The comment in compat.c is wrong, every architecture provides a get_compat_sigevent() for the IPC compat code already. This basically moves the x86_64 version to common code and removes all the others. Signed-off-by: NChristoph Hellwig <hch@lst.de> Acked-by: NPaul Mackerras <paulus@samba.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Acked-by: NAndi Kleen <ak@muc.de> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 10 1月, 2006 1 次提交
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由 Stephen Rothwell 提交于
Matthew Wilcox wondered why we need these functions. We don't. Remove them and just use the "normal" versions. Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 09 1月, 2006 3 次提交
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由 Anton Blanchard 提交于
ppc64 has its own version of sys_time. It looks pretty scary, touching a whole bunch of variables without any locking or memory ordering. In fact, a recent bugreport has shown it can actually go backwards. Time to remove it and just use the generic sys_time, which is implemented on top of do_gettimeofday. Signed-off-by: NAnton Blanchard <anton@samba.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Arnd Bergmann 提交于
This is the current version of the spu file system, used for driving SPEs on the Cell Broadband Engine. This release is almost identical to the version for the 2.6.14 kernel posted earlier, which is available as part of the Cell BE Linux distribution from http://www.bsc.es/projects/deepcomputing/linuxoncell/. The first patch provides all the interfaces for running spu application, but does not have any support for debugging SPU tasks or for scheduling. Both these functionalities are added in the subsequent patches. See Documentation/filesystems/spufs.txt on how to use spufs. Signed-off-by: NArnd Bergmann <arndb@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 David Woodhouse 提交于
This cleanup patch speeds up the null syscall path on ppc64 by about 3%, and brings the ppc32 and ppc64 code slightly closer together. The ppc64 code was checking current_thread_info()->flags twice in the syscall exit path; once for TIF_SYSCALL_T_OR_A before disabling interrupts, and then again for TIF_SIGPENDING|TIF_NEED_RESCHED etc after disabling interrupts. Now we do the same as ppc32 -- check the flags only once in the fast path, and re-enable interrupts if necessary in the ptrace case. The patch abolishes the 'syscall_noerror' member of struct thread_info and replaces it with a TIF_NOERROR bit in the flags, which is handled in the slow path. This shortens the syscall entry code, which no longer needs to clear syscall_noerror. The patch adds a TIF_SAVE_NVGPRS flag which causes the syscall exit slow path to save the non-volatile GPRs into a signal frame. This removes the need for the assembly wrappers around sys_sigsuspend(), sys_rt_sigsuspend(), et al which existed solely to save those registers in advance. It also means I don't have to add new wrappers for ppoll() and pselect(), which is what I was supposed to be doing when I got distracted into this... Finally, it unifies the ppc64 and ppc32 methods of handling syscall exit directly into a signal handler (as required by sigsuspend et al) by introducing a TIF_RESTOREALL flag which causes _all_ the registers to be reloaded from the pt_regs by taking the ret_from_exception path, instead of the normal syscall exit path which stomps on the callee-saved GPRs. It appears to pass an LTP test run on ppc64, and passes basic testing on ppc32 too. Brief tests of ptrace functionality with strace and gdb also appear OK. I wouldn't send it to Linus for 2.6.15 just yet though :) Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 18 10月, 2005 2 次提交
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由 Stephen Rothwell 提交于
This allows us to get rid of one type of entry in systbl.S. In passing we remove the duplicate compat_sys_getdents and compat_sys_utimes for which there are generic versions. Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
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由 Paul Mackerras 提交于
This makes ppc use the syscalls.c from arch/powerpc/kernel, exports copy_and_flush from head_32.S for use by prom_init.c (ARCH=powerpc), and consolidates the sys_fadvise64_64 implementations for 32-bit. Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 17 10月, 2005 1 次提交
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由 Paul Mackerras 提交于
Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 10 10月, 2005 1 次提交
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由 Paul Mackerras 提交于
The system call table has been consolidated into systbl.S. We have separate 32-bit and 64-bit versions of entry.S and misc.S since the code is mostly sufficiently different to be not worth merging. There are some common bits that will be extracted in future. Signed-off-by: NPaul Mackerras <paulus@samba.org>
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