Commit 7be68284 authored by Simon Marchi's avatar Simon Marchi Committed by Chris Metcalf
Browse files

arch/tile: implement user_regset interface on tile 



This is a basic implementation of user_regset for the tile
architecture. It reuses the basic blocks that were already there.

Signed-off-by: default avatarSimon Marchi <simon.marchi@polymtl.ca>
Signed-off-by: default avatarChris Metcalf <cmetcalf@tilera.com>
parent 395e095e

arch/tile/kernel/ptrace.c

+62 −0
Original line number Diff line number Diff line
@@ -19,7 +19,10 @@ 
#include <linux/kprobes.h>

#include <linux/compat.h>

#include <linux/uaccess.h>

#include <linux/regset.h>

#include <linux/elf.h>

#include <asm/traps.h>

#include <arch/chip.h>



void user_enable_single_step(struct task_struct *child)

{
@@ -80,6 +83,65 @@ static void putregs(struct task_struct *child, struct pt_regs *uregs) 
	*regs = *uregs;

}



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, &regs);



	return user_regset_copyout(&pos, &count, &kbuf, &ubuf, &regs, 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, &regs, 0,

				 sizeof(regs));

	if (ret)

		return ret;



	putregs(target, &regs);



	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 = CHIP_ARCH_NAME,

	.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;

}



long arch_ptrace(struct task_struct *child, long request,

		 unsigned long addr, unsigned long data)

{