BMC/Intel-BMC/linux.git/arch/mips/kernel/ptrace32.c, branch dev

MIPS: Remove asm/user.h

2014-08-01T22:06:37+00:00

The struct user definition in this file is not used anywhere (the ELF core dumper does not use that format). Therefore, remove the header and instead enable the asm-generic user.h which is an empty header to satisfy a few generic headers which still try to include user.h. Signed-off-by: Alex Smith Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7459/ Signed-off-by: Ralf Baechle

MIPS: ptrace: Fix user pt_regs definition, use in ptrace_{get, set}regs()

2014-08-01T22:06:37+00:00

In uapi/asm/ptrace.h, a user version of pt_regs is defined wrapped in ifndef __KERNEL__. This structure definition does not match anything used by any kernel API, in particular it does not match the format used by PTRACE_{GET,SET}REGS. Therefore, replace the structure definition with one matching what is used by PTRACE_{GET,SET}REGS. The format used by these is the same for both 32-bit and 64-bit. Also, change the implementation of PTRACE_{GET,SET}REGS to use this new structure definition. The structure is renamed to user_pt_regs when __KERNEL__ is defined to avoid conflicts with the kernel's own pt_regs. Signed-off-by: Alex Smith Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7457/ Signed-off-by: Ralf Baechle

MIPS: ptrace: Avoid smp_processor_id() when retrieving FPU IR

2014-07-30T21:27:03+00:00

Whenever ptrace attempts to retrieve the FPU implementation register it accesses it through current_cpu_data, which calls smp_processor_id(). Since the code may execute with preemption enabled, this can trigger a warning. Fix this by using boot_cpu_data to get the IR instead. Signed-off-by: Alex Smith Cc: # v3.15+ Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7449/ Signed-off-by: Ralf Baechle

MIPS: Simplify PTRACE_PEEKUSR for FPC_EIR

2014-03-31T16:17:12+00:00

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 Reviewed-by: Qais Yousef Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/6144/ Signed-off-by: Ralf Baechle

MIPS: Simplify FP context access

2014-03-26T22:09:09+00:00

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 Reviewed-by: Qais Yousef Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/6532/ Signed-off-by: Ralf Baechle

MIPS: Support for 64-bit FP with O32 binaries

2014-01-13T22:40:56+00:00

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 Cc: linux-mips@linux-mips.org Cc: Paul Burton Patchwork: https://patchwork.linux-mips.org/patch/6154/ Signed-off-by: Ralf Baechle

MIPS: Whitespace cleanup.

2013-02-01T09:00:22+00:00

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

Disintegrate asm/system.h for MIPS

2012-03-28T17:30:02+00:00

Disintegrate asm/system.h for MIPS. Signed-off-by: David Howells Acked-by: Ralf Baechle cc: linux-mips@linux-mips.org

headers: smp_lock.h redux

2009-07-12T19:22:34+00:00

* 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 Signed-off-by: Linus Torvalds

MIPS: 64-bit: Use generic 32-bit ptrace compat code.

2009-01-11T09:57:19+00:00

Signed-off-by: Anirban Sinha Signed-off-by: Ralf Baechle