sh: ptrace: Introduce user_regset interface for gp regs. (934135c1) · Commits · EulixOS / Software / Kernel

arch/sh/include/asm/elf.h

+9 −0

Original line number	Diff line number	Diff line
		@@ -108,6 +108,15 @@ 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)

		#if defined(CONFIG_SUPERH32) && \
		(!defined(CONFIG_SH_FPU) && !defined(CONFIG_SH_DSP))
		/*
		* Enable dump using regset for general purpose registers, use this as
		* the default once the FPU and DSP registers are moved over also.
		*/
		#define CORE_DUMP_USE_REGSET
		#endif

		#define USE_ELF_CORE_DUMP
		#define ELF_FDPIC_CORE_EFLAGS EF_SH_FDPIC
		#define ELF_EXEC_PAGESIZE PAGE_SIZE

arch/sh/include/asm/ptrace.h

+7 −1

Original line number	Diff line number	Diff line
		@@ -87,12 +87,18 @@ struct pt_dspregs {
		unsigned long mod;
		};

		#define PTRACE_GETREGS 12 /* General registers */
		#define PTRACE_SETREGS 13

		#define PTRACE_GETFPREGS 14 /* FPU registers */
		#define PTRACE_SETFPREGS 15

		#define PTRACE_GETFDPIC 31 /* get the ELF fdpic loadmap address */

		#define PTRACE_GETFDPIC_EXEC 0 /* [addr] request the executable loadmap */
		#define PTRACE_GETFDPIC_INTERP 1 /* [addr] request the interpreter loadmap */

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

arch/sh/kernel/ptrace_32.c

+99 −17

Original line number	Diff line number	Diff line
		/*
		* linux/arch/sh/kernel/ptrace.c
		* SuperH process tracing
		*
		* Original x86 implementation:
		* By Ross Biro 1/23/92
		* edited by Linus Torvalds
		* Copyright (C) 1999, 2000 Kaz Kojima & Niibe Yutaka
		* Copyright (C) 2002 - 2008 Paul Mundt
		*
		* SuperH version: Copyright (C) 1999, 2000 Kaz Kojima & Niibe Yutaka
		* Audit support: Yuichi Nakamura <ynakam@hitachisoft.jp>
		* Audit support by Yuichi Nakamura <ynakam@hitachisoft.jp>
		*
		* This file is subject to the terms and conditions of the GNU General Public
		* License. See the file "COPYING" in the main directory of this archive
		* for more details.
		*/
		#include <linux/kernel.h>
		#include <linux/sched.h>
		@@ -22,6 +24,8 @@
		#include <linux/audit.h>
		#include <linux/seccomp.h>
		#include <linux/tracehook.h>
		#include <linux/elf.h>
		#include <linux/regset.h>
		#include <asm/uaccess.h>
		#include <asm/pgtable.h>
		#include <asm/system.h>
		@@ -29,11 +33,6 @@
		#include <asm/mmu_context.h>
		#include <asm/syscalls.h>

		/*
		* does not yet catch signals sent when the child dies.
		* in exit.c or in signal.c.
		*/

		/*
		* This routine will get a word off of the process kernel stack.
		*/
		@@ -62,16 +61,12 @@ static inline int put_stack_long(struct task_struct *task, int offset,

		void user_enable_single_step(struct task_struct *child)
		{
		struct pt_regs *regs = task_pt_regs(child);
		long pc;

		pc = get_stack_long(child, (long)&regs->pc);

		/* Next scheduling will set up UBC */
		if (child->thread.ubc_pc == 0)
		ubc_usercnt += 1;

		child->thread.ubc_pc = pc;
		child->thread.ubc_pc = get_stack_long(child,
		offsetof(struct pt_regs, pc));

		set_tsk_thread_flag(child, TIF_SINGLESTEP);
		}
		@@ -103,6 +98,83 @@ void ptrace_disable(struct task_struct *child)
		user_disable_single_step(child);
		}

		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;

		ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
		regs->regs,
		0, 16 * sizeof(unsigned long));
		if (!ret)
		/* PC, PR, SR, GBR, MACH, MACL, TRA */
		ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
		&regs->pc,
		offsetof(struct pt_regs, pc),
		sizeof(struct pt_regs));
		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;

		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
		regs->regs,
		0, 16 * sizeof(unsigned long));
		if (!ret && count > 0)
		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
		&regs->pc,
		offsetof(struct pt_regs, pc),
		sizeof(struct pt_regs));
		if (!ret)
		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
		sizeof(struct pt_regs), -1);

		return ret;
		}

		/*
		* These are our native regset flavours.
		*/
		enum sh_regset {
		REGSET_GENERAL,
		};

		static const struct user_regset sh_regsets[] = {
		/*
		* Format is:
		* R0 --> R15
		* PC, PR, SR, GBR, MACH, MACL, TRA
		*/
		[REGSET_GENERAL] = {
		.core_note_type = NT_PRSTATUS,
		.n = ELF_NGREG,
		.size = sizeof(long),
		.align = sizeof(long),
		.get = genregs_get,
		.set = genregs_set,
		},
		};

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

		long arch_ptrace(struct task_struct *child, long request, long addr, long data)
		{
		struct user * dummy = NULL;
		@@ -159,6 +231,16 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
		}
		break;

		case PTRACE_GETREGS:
		return copy_regset_to_user(child, &user_sh_native_view,
		REGSET_GENERAL,
		0, sizeof(struct pt_regs),
		(void __user *)data);
		case PTRACE_SETREGS:
		return copy_regset_from_user(child, &user_sh_native_view,
		REGSET_GENERAL,
		0, sizeof(struct pt_regs),
		(const void __user *)data);
		#ifdef CONFIG_SH_DSP
		case PTRACE_GETDSPREGS: {
		unsigned long dp;