- 05 May, 2005 40 commits
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Prasanna S Panchamukhi authored
kernel oops! when unregister_kprobe() is called on a non-registered kprobe. This patch fixes the above problem by checking if the probe exists before unregistering. Signed-off-by:
Prasanna S Panchamukhi <prasanna@in.ibm.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Prasanna S Panchamukhi authored
Kprobes could not handle the insertion of a probe on the ret/lret instruction and used to oops after single stepping since kprobes was modifying eip/rip incorrectly. Adjustment of eip/rip is not required after single stepping in case of ret/lret instruction, because eip/rip points to the correct location after execution of the ret/lret instruction. This patch fixes the above problem. Signed-off-by:
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Bodo Stroesser authored
Remove some definitions and declarations from arch/um/include/skas_ptrace.h, as they have moved to arch/um/include/sysdep/skas_ptrace.h Also, remove PTRACE_SIGPENDING support in UML at all. Signed-off-by:
Bodo Stroesser <bstroesser@fujitsu-siemens.com> Signed-off-by:
Jeff Dike <jdike@addtoit.com> Signed-off-by:
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Bodo Stroesser authored
UML: remove no longer needed arch-signal.h Signed-off-by:
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Bodo Stroesser authored
s390 passes parameters in registers. So the only safe way to find out the address of signal context, error-address and error-type (trap_no), which are passed to signal handlers as parameters, is to declare these parameters. So I inserted an subarch-specific macro which holds the declaration of parameters for signal handlers. Signed-off-by:
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Bodo Stroesser authored
s390 has fast read access to realtime clock (nanosecond resolution). So it makes sense to have an arch-specific implementation not only of __delay, but __udelay also. Signed-off-by:
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Bodo Stroesser authored
Checksum handling largely depends on the subarch. Thus, I renamed i386 arch_csum_partial in arch/um/sys-i386/checksum.S back to csum_partial, removed csum_partial from arch/um/kernel/checksum.c and shifted EXPORT_SYMBOL(csum_partial) to arch/um/sys-i386/ksyms.c. Then, csum_partial_copy_to and csum_partial_copy_from were shifted from arch/um/kernel/checksum.c to arch/um/include/sysdep-i386/checksum.h and inserted in the calling functions csum_partial_copy_from_user() and csum_and_copy_to_user(). Now, arch/um/kernel/checksum.c is empty and removed. Signed-off-by:
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Bodo Stroesser authored
This patch replaces the contents of include/asm-um/linkage.h by #include "asm/arch/linkage.h" Signed-off-by: -
Bodo Stroesser authored
This patch make elh.h a symlink to the new arch-specific include files of the form elf-<subarch>.h, as in the same way already is done for some other includes. Also moves Elf-stuff from archparam-<subarch>.h and elf.h to the new elf-<subarch>.h files. Signed-off-by:
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Jeff Dike authored
This cleans up the error handling and fixes a crash if a hostfs mount fails. Signed-off-by:
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Jeff Dike authored
The completion cleanup got rid of some semaphores, but didn't remove the inclusion of asm/semaphore.h from xterm_kern.c. Signed-off-by:
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Jeff Dike authored
Just some breaking of some overly-long lines. Signed-off-by:
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Jeff Dike authored
This makes SIGWINCH work again, and fixes a couple of SIGWINCH-associated crashes. First, the sigio thread disables SIGWINCH because all hell breaks loose if it ever gets one and tries to call the signal handling code. Second, there was a problem with deferencing tty structs after they were freed. The SIGWINCH support for a tty wasn't being turned off or freed after the tty went away. Signed-off-by:
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Bodo Stroesser authored
This patch removes the arch-specific fault/trap-infos from thread and skas-regs. It adds a new struct faultinfo, that is arch-specific defined in sysdep/faultinfo.h. The structure is inserted in thread.arch and thread.regs.skas and thread.regs.tt Now, segv and other trap-handlers can copy the contents from regs.X.faultinfo to thread.arch.faultinfo with one simple assignment. Also, the number of macros necessary is reduced to FAULT_ADDRESS(struct faultinfo) extracts the faulting address from faultinfo FAULT_WRITE(struct faultinfo) extracts the "is_write" flag SEGV_IS_FIXABLE(struct faultinfo) is true for the fixable segvs, i.e. (TRAP == 14) on i386 UPT_FAULTINFO(regs) result is (struct faultinfo *) to the faultinfo in regs->skas.faultinfo GET_FAULTINFO_FROM_SC(struct faultinfo, struct sigcontext *) copies the relevant parts of the sigcontext to struct faultinfo. On SIGSEGV, call user_signal() instead of handle_segv(), if the architecture provides the information needed in PTRACE_FAULTINFO, or if PTRACE_FAULTINFO is missing, because segv-stub will provide the info. The benefit of the change is, that in case of a non-fixable SIGSEGV, we can give user processes a SIGSEGV, instead of possibly looping on pagefault handling. Since handle_segv() sikked arch_fixup() implicitly by passing ip==0 to segv(), I changed segv() to call arch_fixup() only, if !is_user. Signed-off-by: -
Jeff Dike authored
This fixes write_ldt_entry to treat userspace_pid as an array. Signed-off-by:
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Al Viro authored
O=... builds support. Very easy, actually. Signed-off-by:
Al Viro <viro@parcelfarce.linux.theplanet.co.uk> Signed-off-by:
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Al Viro authored
make distclean et.al. are missing arch/um/sys-x86_64/utils; fixed the same way we have it done for sys-i386 counterpart. Signed-off-by:
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Al Viro authored
helpers in arch/um/util (mk_task and mk_constants) converted. That's it - none of the helpers depends on build and target being the same architecture anymore. Signed-off-by:
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Al Viro authored
mk_thread converted Signed-off-by:
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Al Viro authored
The next group of helpers is a bit trickier - they want the constants similar to those in user-offsets.h, but we need target sc.h for it. So we can't put that into user-offsets (sc.h depends on it) and need the second generated header for that stuff (kernel-offsets.h. BFD... Signed-off-by:
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Al Viro authored
Ditto for mk_sc Signed-off-by:
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Al Viro authored
mk_ptregs converted. Nothing new here, it's the same situation as with mk_user_constants. Signed-off-by:
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Al Viro authored
Beginning of cross-build fixes. Instead of expecting that mk_user_constants (compiled and executed on the build box) will see the sizeof, etc. for target box, we do what every architecture already does for asm-offsets. Namely, have user-offsets.c compiled *for* *target* into user-offsets.s and sed it into the header with relevant constants. We don't need to reinvent any wheels - all tools are already there. This patch deals with mk_user_constants. It doesn't assume any relationship between target and build environment anymore - we pick all defines we need from user-offsets.h. Later patches will deal with the rest of mk_... helpers in the same way. Signed-off-by:
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Al Viro authored
Use explicit os-... in make dependencies instead of playing with symlinks (symlink in question is still created - it's needed for other things; however, there's no reason to complicate ordering here). Signed-off-by:
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Al Viro authored
Make vmlinux.lds.S include appopriate script instead of playing games with symlinks. Signed-off-by:
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Paolo 'Blaisorblade' Giarrusso authored
- Fix some problems with usage of $(targets) (sometimes missing, sometimes used badly) that trigger partial rebuilds when doing a rebuild. - At that purpose, also factor out some common code for symlinks creation. - Fix a x86-64 build warning, caused by -L/usr/lib, which is anyway useless, and invalid in the x86-64 case. Tested on x86_64 and x86. Signed-off-by:
Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by:
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Paolo 'Blaisorblade' Giarrusso authored
In include/asm-x86_64/string.h there are such comments: /* Use C out of line version for memcmp */ #define memcmp __builtin_memcmp int memcmp(const void * cs,const void * ct,size_t count); This would mean that if the compiler does not decide to use __builtin_memcmp, it emits a call to memcmp to be satisfied by the C out-of-line version in lib/string.c. What happens is that after preprocessing, in lib/string.i you may find the definition of "__builtin_strcmp". Actually, by accident, in the object you will find the definition of strcmp and such (maybe a trick intended to redirect calls to __builtin_memcmp to the default memcmp when the definition is not expanded); however, this particular case is not a documented feature as far as I can see. Also, the EXPORT_SYMBOL does not work, so it's duplicated in the arch. I simply added some #undef to lib/string.c and removed the (now duplicated) exports in x86-64 and UML/x86_64 subarchs (the second ones are introduced by another patch I just posted for -mm). Signed-off-by:
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Paolo 'Blaisorblade' Giarrusso authored
These are some trivial fixes for the x86-64 subarch module support. The only potential problem is that I have to modify arch/x86_64/kernel/module.c, to avoid copying the whole of it. I can't use it verbatim because it depends on a special vmalloc-like area for modules, which for now (maybe that's to fix, I guess not) UML/x86-64 has not. I went the easy way and reused the i386 vmalloc()-based allocator. Signed-off-by:
Andi Kleen <ak@suse.de> Signed-off-by:
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Paolo 'Blaisorblade' Giarrusso authored
This patch does some totally trivial compilation fixes. It also restores the debugregs manipulation, which was commented out simply because it doesn't compile on x86_64 (we haven't yet implemented there debugregs handling). Signed-off-by:
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David Gibson authored
This patch started as simply removing a few never-used macros from asm-ppc64/pgtable.h, then kind of grew. It now makes a bunch of cleanups to the ppc64 low-level header files (with corresponding changes to .c files where necessary) such as: - Abolishing never-used macros - Eliminating multiple #defines with the same purpose - Removing pointless macros (cases where just expanding the macro everywhere turns out clearer and more sensible) - Removing some cases where macros which could be defined in terms of each other weren't - Moving imalloc() related definitions from pgtable.h to their own header file (imalloc.h) - Re-arranging headers to group things more logically - Moving all VSID allocation related things to mmu.h, instead of being split between mmu.h and mmu_context.h - Removing some reserved space for flags from the PMD - we're not using it. - Fix some bugs which broke compile with STRICT_MM_TYPECHECKS. Signed-off-by:
David Gibson <dwg@au1.ibm.com> Acked-by:
Paul Mackerras <paulus@samba.org> Signed-off-by:
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Jesper Juhl authored
There's no help text for CONFIG_DEBUG_STACKOVERFLOW - add one. Signed-off-by:
Jesper Juhl <juhl-lkml@dif.dk> Signed-off-by:
Anton Blanchard <anton@samba.org> Signed-off-by:
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Anton Blanchard authored
While looking at code generated by gcc4.0 I noticed some functions still had frame pointers, even after we stopped ppc64 from defining CONFIG_FRAME_POINTER. It turns out kernel/Makefile hardwires -fno-omit-frame-pointer on when compiling schedule.c. Create CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER and define it on architectures that dont require frame pointers in sched.c code. (akpm: blame me for the name) Signed-off-by:
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Kumar Gala authored
We can identify new Freescale PPC cores by the fact that the MSB of the PVR is set. If we are a new Freescale core the decode of major/minor revision numbers is simplified so we dont have to add new case checks for a every new Freescale core. Signed-off-by:
Kumar Gala <kumar.gala@freescale.com> Signed-off-by:
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David Woodhouse authored
The PPC32 kernel puts platform-specific functions into separate sections so that unneeded parts of it can be freed when we've booted and actually worked out what we're running on today. This makes kallsyms ignore those functions, because they're not between _[se]text or _[se]inittext. Rather than teaching kallsyms about the various pmac/chrp/etc sections, this patch adds '_[se]extratext' markers for kallsyms. Signed-off-by:
David Woodhouse <dwmw2@infradead.org> Signed-off-by:
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Herbert Xu authored
The following patch works around the misdetection of the CXT48 codec as a modem by the OSS ac97 driver. Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Stuart Brady authored
Fixes for big-endian systems in soundcard.h and awe_voice.h This patch fixes the AFMT_S16_NE (include/linux/soundcard.h) and AWE_PATCH (awe_voice.h) macros on big-endian systems. It also moves _PATCHKEY into a new file, patchkey.h, in order to remove a duplicate definition of it from awe_voice.h. Signed-off-by:
Stuart Brady <sdbrady@ntlworld.com> Signed-off-by:
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Andrew Morton authored
Fix bug #4509 Signed-off-by:
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Jason Gaston authored
This patch fixes a typo in the Intel AC'97 audio driver intel8x0.c for Intel ESB2. Signed-off-by:
Jason Gaston <Jason.d.gaston@intel.com> Cc: <tiwai@suse.de> Cc: <perex@suse.cz> Signed-off-by:
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Andrea Arcangeli authored
This makes sure that reclaimable buffer headers and reclaimable inodes are accounted properly during the overcommit checks. Signed-off-by:
Andrea Arcangeli <andrea@suse.de> Signed-off-by:
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Alexander Nyberg authored
The recent change fix-crash-in-entrys-restore_all.patch childregs->esp = esp; p->thread.esp = (unsigned long) childregs; - p->thread.esp0 = (unsigned long) (childregs+1); + p->thread.esp0 = (unsigned long) (childregs+1) - 8; p->thread.eip = (unsigned long) ret_from_fork; introduces an inconsistency between esp and esp0 before the task is run the first time. esp0 is no longer the actual start of the stack, but 8 bytes off. This shows itself clearly in a scenario when a ptracer that is set to also ptrace eventual children traces program1 which then clones thread1. Now the ptracer wants to modify the registers of thread1. The x86 ptrace implementation bases it's knowledge about saved user-space registers upon p->thread.esp0. But this will be a few bytes off causing certain writes to the kernel stack to overwrite a saved kernel function address making the kernel when actually running thread1 jump out into user-space. Very spectacular. The testcase I've used is: /* start with strace -f ./a.out */ #include <pthread.h> #include <stdio.h> void *do_thread(void *p) { for (;;); } int main() { pthread_t one; pthread_create(&one, NULL, &do_thread, NULL); for (;;); return 0; } So, my solution is to instead of just adjusting esp0 that creates an inconsitent state I adjust where the user-space registers are saved with -8 bytes. This gives us the wanted extra bytes on the start of the stack and esp0 is now correct. This solves the issues I saw from the original testcase from Mateusz Berezecki and has survived testing here. I think this should go into -mm a round or two first however as there might be some cruft around depending on pt_regs lying on the start of the stack. That however would have broken with the first change too! It's actually a 2-line diff but I had to move the comment of why the -8 bytes are there a few lines up. Thanks to Zwane for helping me with this. Signed-off-by:Alexander Nyberg <alexn@telia.com> Signed-off-by:
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