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Date: Fri, 14 Dec 2012 23:34:49 -0500 From: Simon Marchi <simon.marchi@...ymtl.ca> To: cmetcalf@...era.com Cc: linux-kernel@...r.kernel.org, Simon Marchi <simon.marchi@...ymtl.ca> Subject: [PATCH 1/3] arch/tile: implement user_regset interface on tilegx This is an implementation of user_regset for the tilegx architecture. It reuses the basic blocks that were already there. Signed-off-by: Simon Marchi <simon.marchi@...ymtl.ca> --- I only tested these patches on a 3.0 kernel, as this is what my current setup allows me. Some testing on more recent versions would be appreciated, although I don't think the user_regset framework changed much since then. Also, I put some ifdefs so that these patches only affect tilegx and not the older tile architectures, which I don't have access to. Hopefully someone else can finish the work for those, it's probably not much. arch/tile/kernel/ptrace.c | 65 +++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 65 insertions(+), 0 deletions(-) diff --git a/arch/tile/kernel/ptrace.c b/arch/tile/kernel/ptrace.c index b32bc3f..0e68d06 100644 --- a/arch/tile/kernel/ptrace.c +++ b/arch/tile/kernel/ptrace.c @@ -19,6 +19,8 @@ #include <linux/kprobes.h> #include <linux/compat.h> #include <linux/uaccess.h> +#include <linux/regset.h> +#include <linux/elf.h> #include <asm/traps.h> void user_enable_single_step(struct task_struct *child) @@ -80,6 +82,69 @@ static void putregs(struct task_struct *child, struct pt_regs *uregs) *regs = *uregs; } +#ifdef __tilegx__ + +enum tile_regset { + REGSET_GPR, +}; + +static int tile_gpr_get(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + void *kbuf, void __user *ubuf) +{ + struct pt_regs regs; + + getregs(target, ®s); + + return user_regset_copyout(&pos, &count, &kbuf, &ubuf, ®s, 0, + sizeof(regs)); +} + +static int tile_gpr_set(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf) +{ + int ret; + struct pt_regs regs; + + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®s, 0, + sizeof(regs)); + if (ret) + return ret; + + putregs(target, ®s); + + return 0; +} + +static const struct user_regset tile_user_regset[] = { + [REGSET_GPR] = { + .core_note_type = NT_PRSTATUS, + .n = ELF_NGREG, + .size = sizeof(elf_greg_t), + .align = sizeof(elf_greg_t), + .get = tile_gpr_get, + .set = tile_gpr_set, + }, +}; + +static const struct user_regset_view tile_user_regset_view = { + .name = "tilegx", + .e_machine = ELF_ARCH, + .ei_osabi = ELF_OSABI, + .regsets = tile_user_regset, + .n = ARRAY_SIZE(tile_user_regset), +}; + +const struct user_regset_view *task_user_regset_view(struct task_struct *task) +{ + return &tile_user_regset_view; +} + +#endif /* __tilegx__ */ + long arch_ptrace(struct task_struct *child, long request, unsigned long addr, unsigned long data) { -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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