- 01 10月, 2012 1 次提交
-
-
由 Al Viro 提交于
the only non-obvious part is that current_pt_regs() is really needed here - task_pt_regs() is NULL for kernel threads; it's OK for ptrace uses (the thing task_pt_regs() is intended for), but not for us. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
-
- 30 4月, 2012 1 次提交
-
-
由 Anton Blanchard 提交于
PowerPC has non standard getregs calls that only dump the GPRs or FPRs and have their arguments reversed. commit e17666ba (ptrace updates & new, better requests) in 2.6.3 deprecated them and introduced more standard versions. It's been about 5 years and I know of no users of the old calls so lets remove them. Signed-off-by: NAnton Blanchard <anton@samba.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
-
- 14 2月, 2012 1 次提交
-
-
由 Srikar Dronamraju 提交于
With this change, helpers such as instruction_pointer() et al, get defined in the generic header in terms of GET_IP Removed the unnecessary definition of profile_pc in !CONFIG_SMP case as suggested by Mike Frysinger. Signed-off-by: NSrikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by: NAnanth N Mavinakayanahalli <ananth@in.ibm.com> Acked-by: NMike Frysinger <vapier@gentoo.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
-
- 18 1月, 2012 1 次提交
-
-
由 Eric Paris 提交于
The audit system previously expected arches calling to audit_syscall_exit to supply as arguments if the syscall was a success and what the return code was. Audit also provides a helper AUDITSC_RESULT which was supposed to simplify things by converting from negative retcodes to an audit internal magic value stating success or failure. This helper was wrong and could indicate that a valid pointer returned to userspace was a failed syscall. The fix is to fix the layering foolishness. We now pass audit_syscall_exit a struct pt_reg and it in turns calls back into arch code to collect the return value and to determine if the syscall was a success or failure. We also define a generic is_syscall_success() macro which determines success/failure based on if the value is < -MAX_ERRNO. This works for arches like x86 which do not use a separate mechanism to indicate syscall failure. We make both the is_syscall_success() and regs_return_value() static inlines instead of macros. The reason is because the audit function must take a void* for the regs. (uml calls theirs struct uml_pt_regs instead of just struct pt_regs so audit_syscall_exit can't take a struct pt_regs). Since the audit function takes a void* we need to use static inlines to cast it back to the arch correct structure to dereference it. The other major change is that on some arches, like ia64, MIPS and ppc, we change regs_return_value() to give us the negative value on syscall failure. THE only other user of this macro, kretprobe_example.c, won't notice and it makes the value signed consistently for the audit functions across all archs. In arch/sh/kernel/ptrace_64.c I see that we were using regs[9] in the old audit code as the return value. But the ptrace_64.h code defined the macro regs_return_value() as regs[3]. I have no idea which one is correct, but this patch now uses the regs_return_value() function, so it now uses regs[3]. For powerpc we previously used regs->result but now use the regs_return_value() function which uses regs->gprs[3]. regs->gprs[3] is always positive so the regs_return_value(), much like ia64 makes it negative before calling the audit code when appropriate. Signed-off-by: NEric Paris <eparis@redhat.com> Acked-by: H. Peter Anvin <hpa@zytor.com> [for x86 portion] Acked-by: Tony Luck <tony.luck@intel.com> [for ia64] Acked-by: Richard Weinberger <richard@nod.at> [for uml] Acked-by: David S. Miller <davem@davemloft.net> [for sparc] Acked-by: Ralf Baechle <ralf@linux-mips.org> [for mips] Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [for ppc]
-
- 21 3月, 2011 1 次提交
-
-
由 Mike Wolf 提交于
In some cases during a threaded core dump not all the threads will have a full register set. This happens when the signal causing the core dump races with a thread exiting. The race happens when the exiting thread has entered the kernel for the last time before the signal arrives, but doesn't get far enough through the exit code to avoid being included in the core dump. So we get a thread included in the core dump which is never going to go out to userspace again and only has a partial register set recorded Normally we would catch each thread as it is about to go into userspace and capture the full register set then. However, this exiting thread is never going to go out to userspace again, so we have no way to capture its full register set. It doesn't really matter, though, as this is a thread which is effectively already dead. So instead of hitting a BUG() in this case (a really bad choice of action in the first place), we use a poison value for the register values. [BenH]: Some cosmetic/stylistic changes and fix build on ppc32 Signed-off-by: NMike Wolf <mjw@linux.vnet.ibm.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
-
- 08 7月, 2010 1 次提交
-
-
由 Sam Ravnborg 提交于
Build of ptrace.h failed for assembly because it pulls in stdint.h. Use exportable types (__u32, __u64) to avoid the dependency on stdint.h. Signed-off-by: NSam Ravnborg <sam@ravnborg.org> Cc: Andrey Volkov <avolkov@varma-el.com> Cc: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: NDave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
-
- 07 4月, 2010 1 次提交
-
-
由 Mahesh Salgaonkar 提交于
This patch ports the kprobe-based event tracer to powerpc. This patch is based on x86 port. This brings powerpc on par with x86. Signed-off-by: NMahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Acked-by: NMasami Hiramatsu <mhiramat@redhat.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
-
- 13 3月, 2010 1 次提交
-
-
由 Christoph Hellwig 提交于
While in theory user_enable_single_step/user_disable_single_step/ user_enable_blockstep could also be provided as an inline or macro there's no good reason to do so, and having the prototype in one places keeps code size and confusion down. Roland said: The original thought there was that user_enable_single_step() et al might well be only an instruction or three on a sane machine (as if we have any of those!), and since there is only one call site inlining would be beneficial. But I agree that there is no strong reason to care about inlining it. As to the arch changes, there is only one thought I'd add to the record. It was always my thinking that for an arch where PTRACE_SINGLESTEP does text-modifying breakpoint insertion, user_enable_single_step() should not be provided. That is, arch_has_single_step()=>true means that there is an arch facility with "pure" semantics that does not have any unexpected side effects. Inserting a breakpoint might do very unexpected strange things in multi-threaded situations. Aside from that, it is a peculiar side effect that user_{enable,disable}_single_step() should cause COW de-sharing of text pages and so forth. For PTRACE_SINGLESTEP, all these peculiarities are the status quo ante for that arch, so having arch_ptrace() itself do those is one thing. But for building other things in the future, it is nicer to have a uniform "pure" semantics that arch-independent code can expect. OTOH, all such arch issues are really up to the arch maintainer. As of today, there is nothing but ptrace using user_enable_single_step() et al so it's a distinction without a practical difference. If/when there are other facilities that use user_enable_single_step() and might care, the affected arch's can revisit the question when someone cares about the quality of the arch support for said new facility. Signed-off-by: NChristoph Hellwig <hch@lst.de> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Roland McGrath <roland@redhat.com> Acked-by: NDavid Howells <dhowells@redhat.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
- 17 2月, 2010 1 次提交
-
-
由 Dave Kleikamp 提交于
powerpc: Extended ptrace interface From: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Based on patches originally written by Torez Smith. Add a new extended ptrace interface so that user-space has a single interface for powerpc, without having to know the specific layout of the debug registers. Implement: PPC_PTRACE_GETHWDEBUGINFO PPC_PTRACE_SETHWDEBUG PPC_PTRACE_DELHWDEBUG Signed-off-by: NDave Kleikamp <shaggy@linux.vnet.ibm.com> Acked-by: NDavid Gibson <dwg@au1.ibm.com> Cc: Torez Smith <lnxtorez@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: Sergio Durigan Junior <sergiodj@br.ibm.com> Cc: Thiago Jung Bauermann <bauerman@br.ibm.com> Cc: linuxppc-dev list <Linuxppc-dev@ozlabs.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
-
- 16 12月, 2009 1 次提交
-
-
由 Oleg Nesterov 提交于
Suggested by Roland. Implement user_single_step_siginfo() for powerpc. Signed-off-by: NOleg Nesterov <oleg@redhat.com> Acked-by: NRoland McGrath <roland@redhat.com> Cc: <linux-arch@vger.kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
- 09 6月, 2009 1 次提交
-
-
由 Roland McGrath 提交于
Reworked by: Benjamin Herrenschmidt <benh@kernel.crashing.org> This adds block-step support on powerpc, including a PTRACE_SINGLEBLOCK request for ptrace. The BookE implementation is tweaked to fire a single step after a block step in order to mimmic the server behaviour. Signed-off-by: NRoland McGrath <roland@redhat.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
-
- 01 12月, 2008 1 次提交
-
-
由 Christoph Hellwig 提交于
All architectures now use the generic compat_sys_ptrace, as should every new architecture that needs 32bit compat (if we'll ever get another). Remove the now superflous __ARCH_WANT_COMPAT_SYS_PTRACE define, and also kill a comment about __ARCH_SYS_PTRACE that was added after __ARCH_SYS_PTRACE was already gone. Signed-off-by: NChristoph Hellwig <hch@lst.de> Acked-by: NDavid S. Miller <davem@davemloft.net> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
- 21 10月, 2008 1 次提交
-
-
由 Harvey Harrison 提交于
__FUNCTION__ is gcc-specific, use __func__ Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com> Acked-by: NRandy Dunlap <randy.dunlap@oracle.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
- 04 8月, 2008 1 次提交
-
-
由 Stephen Rothwell 提交于
from include/asm-powerpc. This is the result of a mkdir arch/powerpc/include/asm git mv include/asm-powerpc/* arch/powerpc/include/asm Followed by a few documentation/comment fixups and a couple of places where <asm-powepc/...> was being used explicitly. Of the latter only one was outside the arch code and it is a driver only built for powerpc. Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: NPaul Mackerras <paulus@samba.org>
-
- 28 7月, 2008 1 次提交
-
-
由 Roland McGrath 提交于
Add asm/syscall.h for powerpc with all the required entry points. This will allow arch-independent tracing code for system calls. BenH: Fixed up use of regs->trap to properly mask low bit Signed-off-by: NRoland McGrath <roland@redhat.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
-
- 01 7月, 2008 1 次提交
-
-
由 Michael Neuling 提交于
This patch extends the floating point save and restore code to use the VSX load/stores when VSX is available. This will make FP context save/restore marginally slower on FP only code, when VSX is available, as it has to load/store 128bits rather than just 64bits. Mixing FP, VMX and VSX code will get constant architected state. The signals interface is extended to enable access to VSR 0-31 doubleword 1 after discussions with tool chain maintainers. Backward compatibility is maintained. The ptrace interface is also extended to allow access to VSR 0-31 full registers. Signed-off-by: NMichael Neuling <mikey@neuling.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
-
- 14 5月, 2008 1 次提交
-
-
由 Kumar Gala 提交于
We use the low bits of regs->trap as flag bits. We already indicate critical and machine check level exceptions via this mechanism. Extend it to indicate debug level exceptions. Signed-off-by: NKumar Gala <galak@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
-
- 18 4月, 2008 1 次提交
-
-
由 Benjamin Herrenschmidt 提交于
This moves various definitions used all over the place to parse stack frames to ptrace.h so only one definition is needed. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
-
- 07 2月, 2008 1 次提交
-
-
由 Roland McGrath 提交于
This replaces powerpc's compat_sys_ptrace with a compat_arch_ptrace and enables the new generic definition of compat_sys_ptrace instead. Signed-off-by: NRoland McGrath <roland@redhat.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
-
- 30 1月, 2008 1 次提交
-
-
由 Roland McGrath 提交于
This defines the new standard arch_has_single_step macro. It makes the existing set_single_step and clear_single_step entry points global, and renames them to the new standard names user_enable_single_step and user_disable_single_step, respectively. Signed-off-by: NRoland McGrath <roland@redhat.com> Signed-off-by: NIngo Molnar <mingo@elte.hu> Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
-
- 24 12月, 2007 1 次提交
-
-
由 Benjamin Herrenschmidt 提交于
This adds a cputable function pointer for the CPU-side machine check handling. The semantic is still the same as the old one, the one in ppc_md. overrides the one in cputable, though ultimately we'll want to change that so the CPU gets first. This removes CONFIG_440A which was a problem for multiplatform kernels and instead fixes up the IVOR at runtime from a setup_cpu function. The "A" version of the machine check also tweaks the regs->trap value to differenciate the 2 versions at the C level. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NJosh Boyer <jwboyer@linux.vnet.ibm.com>
-
- 14 6月, 2007 2 次提交
-
-
由 Benjamin Herrenschmidt 提交于
This folds back the ptrace-common.h bits back into ptrace.c and removes that file. The FSL SPE bits from ptrace-ppc32.h are folded back in as well. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
-
由 Benjamin Herrenschmidt 提交于
The powerpc ptrace interface is dodgy at best. We have defined our "own" versions of GETREGS/SETREGS/GETFPREGS/SETFPREGS that strangely take arguments in reverse order from other archs (in addition to having different request numbers) and have subtle issue, like not accessing all of the registers in their respective categories. This patch moves the implementation of those to a separate function in order to facilitate their deprecation in the future, and provides new ptrace requests that mirror the x86 and sparc ones and use the same numbers: PTRACE_GETREGS : returns an entire pt_regs (the whole thing, not only the 32 GPRs, though that doesn't include the FPRs etc... There's a compat version for 32 bits that returns a 32 bits compatible pt_regs (44 uints) PTRACE_SETREGS : sets an entire pt_regs (the whole thing, not only the 32 GPRs, though that doesn't include the FPRs etc... Some registers cannot be written to and will just be dropped, this is the same as with POKEUSR, that is anything above MQ on 32 bits and CCR on 64 bits. There is a compat version as well. PTRACE_GETFPREGS : returns all the FP registers -including- the FPSCR that is 33 doubles (regardless of 32/64 bits) PTRACE_SETFPREGS : sets all the FP registers -including- the FPSCR that is 33 doubles (regardless of 32/64 bits) And two that only exist on 64 bits kernels: PTRACE_GETREGS64 : Same as PTRACE_GETREGS, except there is no compat function, a 32 bits process will obtain the full 64 bits registers PTRACE_SETREGS64 : Same as PTRACE_SETREGS, except there is no compat function, a 32 bits process will set the full 64 bits registers The two later ones makes things easier to have a 32 bits debugger on a 64 bits program (or on a 32 bits program that uses the full 64 bits of the GPRs, which is possible though has issues that will be fixed in a later patch). Finally, while at it, the patch removes a whole bunch of code duplication between ptrace32.c and ptrace.c, in large part by having the former call into the later for all requests that don't need any special "compat" treatment. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
-
- 02 10月, 2006 1 次提交
-
-
Add the regs_return_value() macro to extract the return value in an architecture agnostic manner, given the pt_regs. Other architecture maintainers may want to add similar helpers. Signed-off-by: NAnanth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: NAnil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
- 22 9月, 2006 1 次提交
-
-
由 Arnd Bergmann 提交于
Ulrich Weigand found a bug with the current version of the asm-powerpc/ptrace.h that prevents building at least the SPU target version of gdb, since some ptrace opcodes are not defined. The problem seems to have originated in the merging of 32 and 64 bit versions of that file, the problem is that some opcodes are only valid on 64 bit kernels, but are also used by 32 bit programs, so they can't depends on the __powerpc64__ symbol. Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
-
- 09 6月, 2006 1 次提交
-
-
由 Renzo Davoli 提交于
I have tested PPC_PTRACE_GETREGS and PPC_PTRACE_SETREGS on umview. I do not understand why historically these tags has been defined as PPC_PTRACE_GETREGS and PPC_PTRACE_SETREGS instead of simply PTRACE_[GS]ETREGS. The other "originality" is that the address must be put into the "addr" field instead of the "data" field as stated in the manual. Signed-off-by: Nrenzo davoli <renzo@cs.unibo.it> Signed-off-by: NPaul Mackerras <paulus@samba.org>
-
- 09 1月, 2006 1 次提交
-
-
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>
-
- 03 11月, 2005 1 次提交
-
-
由 Stephen Rothwell 提交于
Move struct ptregs32 into asm-ppc64/ppc32.h Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
-
- 12 9月, 2005 2 次提交
-
-
由 Anton Blanchard 提交于
- Add PTRACE_GET_DEBUGREG/PTRACE_SET_DEBUGREG. The definition is as follows: /* * Get or set a debug register. The first 16 are DABR registers and the * second 16 are IABR registers. */ #define PTRACE_GET_DEBUGREG 25 #define PTRACE_SET_DEBUGREG 26 DABR == data breakpoint and IABR = instruction breakpoint in IBM speak. We could split out the IABR into 2 more ptrace calls but I figured there was no need and 16 DABR registers should be more than enough (POWER4/POWER5 have one). - Add 2 new SIGTRAP si_codes: TRAP_HWBKPT and TRAP_BRANCH. I couldnt find any standards on either of these so I copied what ia64 is doing. Again this might be better placed in include/asm-generic/siginfo.h Signed-off-by: NAnton Blanchard <anton@samba.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
-
由 Anton Blanchard 提交于
- Remove the PPC_REG* defines - Wrap some more stuff with ifdef __KERNEL__ - Add missing PT_TRAP, PT_DAR, PT_DSISR defines - Add PTRACE_GETEVRREGS/PTRACE_SETEVRREGS, even though we dont use it on ppc64 we dont want to allocate them for something else. Signed-off-by: NAnton Blanchard <anton@samba.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
-
- 17 4月, 2005 1 次提交
-
-
由 Linus Torvalds 提交于
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!
-