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path: root/arch/mips/kernel/ptrace32.c
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2014-03-31MIPS: Simplify PTRACE_PEEKUSR for FPC_EIRPaul Burton1-39/+3
All architecturally defined bits in the FPU implementation register are read only & unchanging. It contains some implementation-defined bits but the architecture manual states "This bits are explicitly not intended to be used for mode control functions" which seems to provide justification for viewing the register as a whole as unchanging. This being the case we can simply re-use the value we read at boot rather than having to re-read it later, and avoid the complexity which that read entails. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Reviewed-by: Qais Yousef <qais.yousef@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/6144/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-03-27MIPS: Simplify FP context accessPaul Burton1-17/+8
This patch replaces the fpureg_t typedef with a "union fpureg" enabling easier access to 32 & 64 bit values. This allows the access macros used in cp1emu.c to be simplified somewhat. It will also make it easier to expand the width of the FP registers as will be done in a future patch in order to support the 128 bit registers introduced with MSA. No behavioural change is intended by this patch. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Reviewed-by: Qais Yousef <qais.yousef@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/6532/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-01-14MIPS: Support for 64-bit FP with O32 binariesPaul Burton1-22/+31
CPUs implementing MIPS32 R2 may include a 64-bit FPU, just as MIPS64 CPUs do. In order to preserve backwards compatibility a 64-bit FPU will act like a 32-bit FPU (by accessing doubles from the least significant 32 bits of an even-odd pair of FP registers) when the Status.FR bit is zero, again just like a mips64 CPU. The standard O32 ABI is defined expecting a 32-bit FPU, however recent toolchains support use of a 64-bit FPU from an O32 MIPS32 executable. When an ELF executable is built to use a 64-bit FPU a new flag (EF_MIPS_FP64) is set in the ELF header. With this patch the kernel will check the EF_MIPS_FP64 flag when executing an O32 binary, and set Status.FR accordingly. The addition of O32 64-bit FP support lessens the opportunity for optimisation in the FPU emulator, so a CONFIG_MIPS_O32_FP64_SUPPORT Kconfig option is introduced to allow this support to be disabled for those that don't require it. Inspired by an earlier patch by Leonid Yegoshin, but implemented more cleanly & correctly. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: Paul Burton <paul.burton@imgtec.com> Patchwork: https://patchwork.linux-mips.org/patch/6154/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-02-01MIPS: Whitespace cleanup.Ralf Baechle1-1/+1
Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-03-28Disintegrate asm/system.h for MIPSDavid Howells1-1/+0
Disintegrate asm/system.h for MIPS. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> cc: linux-mips@linux-mips.org
2009-07-12headers: smp_lock.h reduxAlexey Dobriyan1-1/+0
* Remove smp_lock.h from files which don't need it (including some headers!) * Add smp_lock.h to files which do need it * Make smp_lock.h include conditional in hardirq.h It's needed only for one kernel_locked() usage which is under CONFIG_PREEMPT This will make hardirq.h inclusion cheaper for every PREEMPT=n config (which includes allmodconfig/allyesconfig, BTW) Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-11MIPS: 64-bit: Use generic 32-bit ptrace compat code.Anirban Sinha1-63/+1
Signed-off-by: Anirban Sinha <asinha@zeugmasystems.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-10-11MIPS: Move ptrace prototypes to ptrace.hRalf Baechle1-6/+0
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-10-11MIPS: Ptrace support for HARDWARE_WATCHPOINTSDavid Daney1-0/+10
This is the final part of the watch register patch. Here we hook up ptrace so that the user space debugger (gdb), can set and read the registers. Signed-off-by: David Daney <ddaney@avtrex.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-10-11MIPS: Use compat_sys_ptraceThomas Bogendoerfer1-35/+8
This replaces mips's sys_ptrace32 with a compat_arch_ptrace and enables the new generic definition of compat_sys_ptrace instead. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-29[MIPS] Store sign-extend register values for PTRACE_GETREGSAtsushi Nemoto1-2/+2
A comment on ptrace_getregs() states "Registers are sign extended to fill the available space." but it is not true. Fix code to match the comment. Also fix casts on each caller to get rid of some warnings. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-12[MIPS] Fix "no space between function name and open parenthesis" warnings.Ralf Baechle1-8/+8
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-10-10[MIPS] Make sure cpu_has_fpu is used only in atomic contextAtsushi Nemoto1-1/+2
Make sure cpu_has_fpu (which uses smp_processor_id()) is used only in atomic context. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-06-19[MIPS] Unify mips_fpu_soft_struct and mips_fpu_hard_structs.Atsushi Nemoto1-11/+5
The struct mips_fpu_soft_struct and mips_fpu_hard_struct are completely same now and the kernel fpu emulator assumes that. This patch unifies them to mips_fpu_struct and get rid of mips_fpu_union. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-04-19[MIPS] MT: Improved multithreading support.Ralf Baechle1-0/+14
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-02-07[MIPS] Sparse: Fix some compiler/sparse warnings in ptrace32.cAtsushi Nemoto1-7/+15
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-01-12[PATCH] mips: task_thread_info()Al Viro1-2/+2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-12[PATCH] mips: task_pt_regs()Al Viro1-4/+2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10MIPS: DSP: eleminate used_dsp.Ralf Baechle1-6/+2
used_dsp was meant to be used like used_math - but since the FPU context is small and lazy context switching is a stupid idea on multiprocessors this idea only got halfway implemented and those bits are were now breaking ptrace. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-01-09[PATCH] use ptrace_get_task_struct in various placesChristoph Hellwig1-20/+6
The ptrace_get_task_struct() helper that I added as part of the ptrace consolidation is useful in variety of places that currently opencode it. Switch them to the common helpers. Add a ptrace_traceme() helper that needs to be explicitly called, and simplify the ptrace_get_task_struct() interface. We don't need the request argument now, and we return the task_struct directly, using ERR_PTR() for error returns. It's a bit more code in the callers, but we have two sane routines that do one thing well now. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-29Protect manipulation of c0_status against preemption and multithreading.Ralf Baechle1-4/+16
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29Revise MIPS 64-bit ptrace interfaceDaniel Jacobowitz1-0/+81
Change the N32 debugging ABI to something more sane, and add support for o32 and n32 debuggers to trace n64 programs. Signed-off-by: Daniel Jacobowitz <dan@codesourcery.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29Support the MIPS32 / MIPS64 DSP ASE.Ralf Baechle1-0/+38
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29NPTL, round one.Ralf Baechle1-0/+5
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-2932-bit compatibility for ptrace GETEVENTMSG operation.Ralf Baechle1-1/+5
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-05-01[PATCH] convert that currently tests _NSIG directly to use valid_signal()Jesper Juhl1-1/+2
Convert most of the current code that uses _NSIG directly to instead use valid_signal(). This avoids gcc -W warnings and off-by-one errors. Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-17Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds1-0/+285
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!
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