sh: Provide linux/regset.h interface for SH-5. (dd76279b) · Commits · jan.koester / Linux

arch/sh/include/asm/elf.h

+0 −2

Original line number	Diff line number	Diff line
		@@ -108,13 +108,11 @@ typedef struct user_fpu_struct elf_fpregset_t;
		#define elf_check_fdpic(x) ((x)->e_flags & EF_SH_FDPIC)
		#define elf_check_const_displacement(x) ((x)->e_flags & EF_SH_PIC)

		#ifdef CONFIG_SUPERH32
		/*
		* Enable dump using regset.
		* This covers all of general/DSP/FPU regs.
		*/
		#define CORE_DUMP_USE_REGSET
		#endif

		#define USE_ELF_CORE_DUMP
		#define ELF_FDPIC_CORE_EFLAGS EF_SH_FDPIC

arch/sh/include/asm/ptrace.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -86,6 +86,7 @@ struct pt_dspregs {
		unsigned long re;
		unsigned long mod;
		};
		#endif

		#define PTRACE_GETREGS 12 /* General registers */
		#define PTRACE_SETREGS 13
		@@ -100,7 +101,6 @@ struct pt_dspregs {

		#define PTRACE_GETDSPREGS 55 /* DSP registers */
		#define PTRACE_SETDSPREGS 56
		#endif

		#ifdef __KERNEL__
		#include <asm/addrspace.h>

arch/sh/kernel/ptrace_64.c

+185 −1

Original line number	Diff line number	Diff line
		@@ -2,7 +2,7 @@
		* arch/sh/kernel/ptrace_64.c
		*
		* Copyright (C) 2000, 2001 Paolo Alberelli
		* Copyright (C) 2003 - 2007 Paul Mundt
		* Copyright (C) 2003 - 2008 Paul Mundt
		*
		* Started from SH3/4 version:
		* SuperH version: Copyright (C) 1999, 2000 Kaz Kojima & Niibe Yutaka
		@@ -29,6 +29,8 @@
		#include <linux/audit.h>
		#include <linux/seccomp.h>
		#include <linux/tracehook.h>
		#include <linux/elf.h>
		#include <linux/regset.h>
		#include <asm/io.h>
		#include <asm/uaccess.h>
		#include <asm/pgtable.h>
		@@ -137,6 +139,165 @@ void user_disable_single_step(struct task_struct *child)
		regs->sr &= ~SR_SSTEP;
		}

		static int genregs_get(struct task_struct *target,
		const struct user_regset *regset,
		unsigned int pos, unsigned int count,
		void kbuf, void __user ubuf)
		{
		const struct pt_regs *regs = task_pt_regs(target);
		int ret;

		/* PC, SR, SYSCALL */
		ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
		&regs->pc,
		0, 3 * sizeof(unsigned long long));

		/* R1 -> R63 */
		if (!ret)
		ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
		regs->regs,
		offsetof(struct pt_regs, regs[0]),
		63 * sizeof(unsigned long long));
		/* TR0 -> TR7 */
		if (!ret)
		ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
		regs->tregs,
		offsetof(struct pt_regs, tregs[0]),
		8 * sizeof(unsigned long long));

		if (!ret)
		ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
		sizeof(struct pt_regs), -1);

		return ret;
		}

		static int genregs_set(struct task_struct *target,
		const struct user_regset *regset,
		unsigned int pos, unsigned int count,
		const void kbuf, const void __user ubuf)
		{
		struct pt_regs *regs = task_pt_regs(target);
		int ret;

		/* PC, SR, SYSCALL */
		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
		&regs->pc,
		0, 3 * sizeof(unsigned long long));

		/* R1 -> R63 */
		if (!ret && count > 0)
		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
		regs->regs,
		offsetof(struct pt_regs, regs[0]),
		63 * sizeof(unsigned long long));

		/* TR0 -> TR7 */
		if (!ret && count > 0)
		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
		regs->tregs,
		offsetof(struct pt_regs, tregs[0]),
		8 * sizeof(unsigned long long));

		if (!ret)
		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
		sizeof(struct pt_regs), -1);

		return ret;
		}

		#ifdef CONFIG_SH_FPU
		int fpregs_get(struct task_struct *target,
		const struct user_regset *regset,
		unsigned int pos, unsigned int count,
		void kbuf, void __user ubuf)
		{
		int ret;

		ret = init_fpu(target);
		if (ret)
		return ret;

		return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
		&target->thread.fpu.hard, 0, -1);
		}

		static int fpregs_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;

		ret = init_fpu(target);
		if (ret)
		return ret;

		set_stopped_child_used_math(target);

		return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
		&target->thread.fpu.hard, 0, -1);
		}

		static int fpregs_active(struct task_struct *target,
		const struct user_regset *regset)
		{
		return tsk_used_math(target) ? regset->n : 0;
		}
		#endif

		/*
		* These are our native regset flavours.
		*/
		enum sh_regset {
		REGSET_GENERAL,
		#ifdef CONFIG_SH_FPU
		REGSET_FPU,
		#endif
		};

		static const struct user_regset sh_regsets[] = {
		/*
		* Format is:
		* PC, SR, SYSCALL,
		* R1 --> R63,
		* TR0 --> TR7,
		*/
		[REGSET_GENERAL] = {
		.core_note_type = NT_PRSTATUS,
		.n = ELF_NGREG,
		.size = sizeof(long long),
		.align = sizeof(long long),
		.get = genregs_get,
		.set = genregs_set,
		},

		#ifdef CONFIG_SH_FPU
		[REGSET_FPU] = {
		.core_note_type = NT_PRFPREG,
		.n = sizeof(struct user_fpu_struct) /
		sizeof(long long),
		.size = sizeof(long long),
		.align = sizeof(long long),
		.get = fpregs_get,
		.set = fpregs_set,
		.active = fpregs_active,
		},
		#endif
		};

		static const struct user_regset_view user_sh64_native_view = {
		.name = "sh64",
		.e_machine = EM_SH,
		.regsets = sh_regsets,
		.n = ARRAY_SIZE(sh_regsets),
		};

		const struct user_regset_view task_user_regset_view(struct task_struct task)
		{
		return &user_sh64_native_view;
		}

		long arch_ptrace(struct task_struct *child, long request, long addr, long data)
		{
		int ret;
		@@ -195,10 +356,33 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
		}
		break;

		case PTRACE_GETREGS:
		return copy_regset_to_user(child, &user_sh64_native_view,
		REGSET_GENERAL,
		0, sizeof(struct pt_regs),
		(void __user *)data);
		case PTRACE_SETREGS:
		return copy_regset_from_user(child, &user_sh64_native_view,
		REGSET_GENERAL,
		0, sizeof(struct pt_regs),
		(const void __user *)data);
		#ifdef CONFIG_SH_FPU
		case PTRACE_GETFPREGS:
		return copy_regset_to_user(child, &user_sh64_native_view,
		REGSET_FPU,
		0, sizeof(struct user_fpu_struct),
		(void __user *)data);
		case PTRACE_SETFPREGS:
		return copy_regset_from_user(child, &user_sh64_native_view,
		REGSET_FPU,
		0, sizeof(struct user_fpu_struct),
		(const void __user *)data);
		#endif
		default:
		ret = ptrace_request(child, request, addr, data);
		break;
		}

		return ret;
		}