Commit a79ca8e7 authored by Al Viro's avatar Al Viro
Browse files

[ia64] regularize do_gpregs_[gs]et() 



now access_elf_reg() does the right thing for everything other than
r0, we can simplify do_grepgs_[gs]et()

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent e2115cf3

arch/ia64/kernel/ptrace.c

+31 −124
Original line number Diff line number Diff line
@@ -1491,10 +1491,7 @@ access_elf_reg(struct task_struct *target, struct unw_frame_info *info, 


void do_gpregs_get(struct unw_frame_info *info, void *arg)

{

	struct pt_regs *pt;

	struct regset_getset *dst = arg;

	elf_greg_t tmp[16];

	unsigned int i, index, min_copy;



	if (unw_unwind_to_user(info) < 0)

		return;
@@ -1517,160 +1514,70 @@ void do_gpregs_get(struct unw_frame_info *info, void *arg) 
						      &dst->u.get.kbuf,

						      &dst->u.get.ubuf,

						      0, ELF_GR_OFFSET(1));

		if (dst->ret || dst->count == 0)

			return;

	}



	/* gr1 - gr15 */

	if (dst->count > 0 && dst->pos < ELF_GR_OFFSET(16)) {

		index = (dst->pos - ELF_GR_OFFSET(1)) / sizeof(elf_greg_t);

		min_copy = ELF_GR_OFFSET(16) > (dst->pos + dst->count) ?

			 (dst->pos + dst->count) : ELF_GR_OFFSET(16);

		for (i = dst->pos; i < min_copy; i += sizeof(elf_greg_t),

				index++)

			if (access_elf_reg(dst->target, info, i,

						&tmp[index], 0) < 0) {

				dst->ret = -EIO;

				return;

			}

		dst->ret = user_regset_copyout(&dst->pos, &dst->count,

				&dst->u.get.kbuf, &dst->u.get.ubuf, tmp,

				ELF_GR_OFFSET(1), ELF_GR_OFFSET(16));

		if (dst->ret || dst->count == 0)

		if (dst->ret)

			return;

	}



	/* r16-r31 */

	if (dst->count > 0 && dst->pos < ELF_NAT_OFFSET) {

		pt = task_pt_regs(dst->target);

		dst->ret = user_regset_copyout(&dst->pos, &dst->count,

				&dst->u.get.kbuf, &dst->u.get.ubuf, &pt->r16,

				ELF_GR_OFFSET(16), ELF_NAT_OFFSET);

		if (dst->ret || dst->count == 0)

			return;

	}

	while (dst->count && dst->pos < ELF_AR_END_OFFSET) {

		unsigned int n, from, to;

		elf_greg_t tmp[16];



	/* nat, pr, b0 - b7 */

	if (dst->count > 0 && dst->pos < ELF_CR_IIP_OFFSET) {

		index = (dst->pos - ELF_NAT_OFFSET) / sizeof(elf_greg_t);

		min_copy = ELF_CR_IIP_OFFSET > (dst->pos + dst->count) ?

			 (dst->pos + dst->count) : ELF_CR_IIP_OFFSET;

		for (i = dst->pos; i < min_copy; i += sizeof(elf_greg_t),

				index++)

			if (access_elf_reg(dst->target, info, i,

						&tmp[index], 0) < 0) {

		from = dst->pos;

		to = from + min(dst->count, (unsigned)sizeof(tmp));

		if (to > ELF_AR_END_OFFSET)

			to = ELF_AR_END_OFFSET;

		for (n = 0; from < to; from += sizeof(elf_greg_t), n++) {

			if (access_elf_reg(dst->target, info, from,

						&tmp[n], 0) < 0) {

				dst->ret = -EIO;

				return;

			}

		dst->ret = user_regset_copyout(&dst->pos, &dst->count,

				&dst->u.get.kbuf, &dst->u.get.ubuf, tmp,

				ELF_NAT_OFFSET, ELF_CR_IIP_OFFSET);

		if (dst->ret || dst->count == 0)

			return;

	}



	/* ip cfm psr ar.rsc ar.bsp ar.bspstore ar.rnat

	 * ar.ccv ar.unat ar.fpsr ar.pfs ar.lc ar.ec ar.csd ar.ssd

	 */

	if (dst->count > 0 && dst->pos < (ELF_AR_END_OFFSET)) {

		index = (dst->pos - ELF_CR_IIP_OFFSET) / sizeof(elf_greg_t);

		min_copy = ELF_AR_END_OFFSET > (dst->pos + dst->count) ?

			 (dst->pos + dst->count) : ELF_AR_END_OFFSET;

		for (i = dst->pos; i < min_copy; i += sizeof(elf_greg_t),

				index++)

			if (access_elf_reg(dst->target, info, i,

						&tmp[index], 0) < 0) {

				dst->ret = -EIO;

				return;

		}

		dst->ret = user_regset_copyout(&dst->pos, &dst->count,

				&dst->u.get.kbuf, &dst->u.get.ubuf, tmp,

				ELF_CR_IIP_OFFSET, ELF_AR_END_OFFSET);

				dst->pos, to);

		if (dst->ret)

			return;

	}

}



void do_gpregs_set(struct unw_frame_info *info, void *arg)

{

	struct pt_regs *pt;

	struct regset_getset *dst = arg;

	elf_greg_t tmp[16];

	unsigned int i, index;



	if (unw_unwind_to_user(info) < 0)

		return;



	if (!dst->count)

		return;

	/* Skip r0 */

	if (dst->count > 0 && dst->pos < ELF_GR_OFFSET(1)) {

	if (dst->pos < ELF_GR_OFFSET(1)) {

		dst->ret = user_regset_copyin_ignore(&dst->pos, &dst->count,

						       &dst->u.set.kbuf,

						       &dst->u.set.ubuf,

						       0, ELF_GR_OFFSET(1));

		if (dst->ret || dst->count == 0)

			return;

	}



	/* gr1-gr15 */

	if (dst->count > 0 && dst->pos < ELF_GR_OFFSET(16)) {

		i = dst->pos;

		index = (dst->pos - ELF_GR_OFFSET(1)) / sizeof(elf_greg_t);

		dst->ret = user_regset_copyin(&dst->pos, &dst->count,

				&dst->u.set.kbuf, &dst->u.set.ubuf, tmp,

				ELF_GR_OFFSET(1), ELF_GR_OFFSET(16));

		if (dst->ret)

			return;

		for ( ; i < dst->pos; i += sizeof(elf_greg_t), index++)

			if (access_elf_reg(dst->target, info, i,

						&tmp[index], 1) < 0) {

				dst->ret = -EIO;

				return;

			}

		if (dst->count == 0)

			return;

	}



	/* gr16-gr31 */

	if (dst->count > 0 && dst->pos < ELF_NAT_OFFSET) {

		pt = task_pt_regs(dst->target);

		dst->ret = user_regset_copyin(&dst->pos, &dst->count,

				&dst->u.set.kbuf, &dst->u.set.ubuf, &pt->r16,

				ELF_GR_OFFSET(16), ELF_NAT_OFFSET);

		if (dst->ret || dst->count == 0)

			return;

	}



	/* nat, pr, b0 - b7 */

	if (dst->count > 0 && dst->pos < ELF_CR_IIP_OFFSET) {

		i = dst->pos;

		index = (dst->pos - ELF_NAT_OFFSET) / sizeof(elf_greg_t);

		dst->ret = user_regset_copyin(&dst->pos, &dst->count,

				&dst->u.set.kbuf, &dst->u.set.ubuf, tmp,

				ELF_NAT_OFFSET, ELF_CR_IIP_OFFSET);

		if (dst->ret)

			return;

		for (; i < dst->pos; i += sizeof(elf_greg_t), index++)

			if (access_elf_reg(dst->target, info, i,

						&tmp[index], 1) < 0) {

				dst->ret = -EIO;

				return;

			}

		if (dst->count == 0)

			return;

	}

	while (dst->count && dst->pos < ELF_AR_END_OFFSET) {

		unsigned int n, from, to;

		elf_greg_t tmp[16];



	/* ip cfm psr ar.rsc ar.bsp ar.bspstore ar.rnat

	 * ar.ccv ar.unat ar.fpsr ar.pfs ar.lc ar.ec ar.csd ar.ssd

	 */

	if (dst->count > 0 && dst->pos < (ELF_AR_END_OFFSET)) {

		i = dst->pos;

		index = (dst->pos - ELF_CR_IIP_OFFSET) / sizeof(elf_greg_t);

		from = dst->pos;

		to = from + sizeof(tmp);

		if (to > ELF_AR_END_OFFSET)

			to = ELF_AR_END_OFFSET;

		/* get up to 16 values */

		dst->ret = user_regset_copyin(&dst->pos, &dst->count,

				&dst->u.set.kbuf, &dst->u.set.ubuf, tmp,

				ELF_CR_IIP_OFFSET, ELF_AR_END_OFFSET);

				from, to);

		if (dst->ret)

			return;

		for ( ; i < dst->pos; i += sizeof(elf_greg_t), index++)

			if (access_elf_reg(dst->target, info, i,

						&tmp[index], 1) < 0) {

		/* now copy them into registers */

		for (n = 0; from < dst->pos; from += sizeof(elf_greg_t), n++)

			if (access_elf_reg(dst->target, info, from,

						&tmp[n], 1) < 0) {

				dst->ret = -EIO;

				return;

			}

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