AcoSail/kernel_optimize_test
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Merge branches 'regset.x86', 'regset.ia64', 'regset.sparc' and 'regset.arm64' into work.regset

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This commit is contained in:
Al Viro 2020-07-27 14:30:51 -04:00
commit 1e56f6d289
7 changed files with 588 additions and 410 deletions
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67
arch/arm64/kernel/ptrace.c
View File

@ -1237,6 +1237,22 @@ enum compat_regset {
REGSET_COMPAT_VFP,
};
static inline compat_ulong_t compat_get_user_reg(struct task_struct *task, int idx)
{
struct pt_regs *regs = task_pt_regs(task);
switch (idx) {
case 15:
return regs->pc;
case 16:
return pstate_to_compat_psr(regs->pstate);
case 17:
return regs->orig_x0;
default:
return regs->regs[idx];
}
}
static int compat_gpr_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
@ -1255,23 +1271,7 @@ static int compat_gpr_get(struct task_struct *target,
return -EIO;
for (i = 0; i < num_regs; ++i) {
unsigned int idx = start + i;
compat_ulong_t reg;
switch (idx) {
case 15:
reg = task_pt_regs(target)->pc;
break;
case 16:
reg = task_pt_regs(target)->pstate;
reg = pstate_to_compat_psr(reg);
break;
case 17:
reg = task_pt_regs(target)->orig_x0;
break;
default:
reg = task_pt_regs(target)->regs[idx];
}
compat_ulong_t reg = compat_get_user_reg(target, start + i);
if (kbuf) {
memcpy(kbuf, &reg, sizeof(reg));
@ -1541,9 +1541,7 @@ static int compat_ptrace_read_user(struct task_struct *tsk, compat_ulong_t off,
else if (off == COMPAT_PT_TEXT_END_ADDR)
tmp = tsk->mm->end_code;
else if (off < sizeof(compat_elf_gregset_t))
return copy_regset_to_user(tsk, &user_aarch32_view,
REGSET_COMPAT_GPR, off,
sizeof(compat_ulong_t), ret);
tmp = compat_get_user_reg(tsk, off >> 2);
else if (off >= COMPAT_USER_SZ)
return -EIO;
else
@ -1555,8 +1553,8 @@ static int compat_ptrace_read_user(struct task_struct *tsk, compat_ulong_t off,
static int compat_ptrace_write_user(struct task_struct *tsk, compat_ulong_t off,
compat_ulong_t val)
{
int ret;
mm_segment_t old_fs = get_fs();
struct pt_regs newregs = *task_pt_regs(tsk);
unsigned int idx = off / 4;
if (off & 3 || off >= COMPAT_USER_SZ)
return -EIO;
@ -1564,14 +1562,25 @@ static int compat_ptrace_write_user(struct task_struct *tsk, compat_ulong_t off,
if (off >= sizeof(compat_elf_gregset_t))
return 0;
set_fs(KERNEL_DS);
ret = copy_regset_from_user(tsk, &user_aarch32_view,
REGSET_COMPAT_GPR, off,
sizeof(compat_ulong_t),
&val);
set_fs(old_fs);
switch (idx) {
case 15:
newregs.pc = val;
break;
case 16:
newregs.pstate = compat_psr_to_pstate(val);
break;
case 17:
newregs.orig_x0 = val;
break;
default:
newregs.regs[idx] = val;
}
return ret;
if (!valid_user_regs(&newregs.user_regs, tsk))
return -EINVAL;
*task_pt_regs(tsk) = newregs;
return 0;
}
#ifdef CONFIG_HAVE_HW_BREAKPOINT

275
arch/ia64/kernel/ptrace.c
View File

@ -1273,52 +1273,43 @@ struct regset_getset {
int ret;
};
static const ptrdiff_t pt_offsets[32] =
{
#define R(n) offsetof(struct pt_regs, r##n)
[0] = -1, R(1), R(2), R(3),
[4] = -1, [5] = -1, [6] = -1, [7] = -1,
R(8), R(9), R(10), R(11), R(12), R(13), R(14), R(15),
R(16), R(17), R(18), R(19), R(20), R(21), R(22), R(23),
R(24), R(25), R(26), R(27), R(28), R(29), R(30), R(31),
#undef R
};
static int
access_elf_gpreg(struct task_struct *target, struct unw_frame_info *info,
unsigned long addr, unsigned long *data, int write_access)
{
struct pt_regs *pt;
unsigned long *ptr = NULL;
int ret;
char nat = 0;
struct pt_regs *pt = task_pt_regs(target);
unsigned reg = addr / sizeof(unsigned long);
ptrdiff_t d = pt_offsets[reg];
pt = task_pt_regs(target);
switch (addr) {
case ELF_GR_OFFSET(1):
ptr = &pt->r1;
break;
case ELF_GR_OFFSET(2):
case ELF_GR_OFFSET(3):
ptr = (void *)&pt->r2 + (addr - ELF_GR_OFFSET(2));
break;
case ELF_GR_OFFSET(4) ... ELF_GR_OFFSET(7):
if (d >= 0) {
unsigned long *ptr = (void *)pt + d;
if (write_access)
*ptr = *data;
else
*data = *ptr;
return 0;
} else {
char nat = 0;
if (write_access) {
/* read NaT bit first: */
unsigned long dummy;
ret = unw_get_gr(info, addr/8, &dummy, &nat);
int ret = unw_get_gr(info, reg, &dummy, &nat);
if (ret < 0)
return ret;
}
return unw_access_gr(info, addr/8, data, &nat, write_access);
case ELF_GR_OFFSET(8) ... ELF_GR_OFFSET(11):
ptr = (void *)&pt->r8 + addr - ELF_GR_OFFSET(8);
break;
case ELF_GR_OFFSET(12):
case ELF_GR_OFFSET(13):
ptr = (void *)&pt->r12 + addr - ELF_GR_OFFSET(12);
break;
case ELF_GR_OFFSET(14):
ptr = &pt->r14;
break;
case ELF_GR_OFFSET(15):
ptr = &pt->r15;
return unw_access_gr(info, reg, data, &nat, write_access);
}
if (write_access)
*ptr = *data;
else
*data = *ptr;
return 0;
}
static int
@ -1490,7 +1481,7 @@ static int
access_elf_reg(struct task_struct *target, struct unw_frame_info *info,
unsigned long addr, unsigned long *data, int write_access)
{
if (addr >= ELF_GR_OFFSET(1) && addr <= ELF_GR_OFFSET(15))
if (addr >= ELF_GR_OFFSET(1) && addr <= ELF_GR_OFFSET(31))
return access_elf_gpreg(target, info, addr, data, write_access);
else if (addr >= ELF_BR_OFFSET(0) && addr <= ELF_BR_OFFSET(7))
return access_elf_breg(target, info, addr, data, write_access);
@ -1500,10 +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;
@ -1526,160 +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)
if (dst->ret)
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) {
while (dst->count && dst->pos < ELF_AR_END_OFFSET) {
unsigned int n, from, to;
elf_greg_t tmp[16];
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_GR_OFFSET(1), ELF_GR_OFFSET(16));
if (dst->ret || dst->count == 0)
dst->pos, to);
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;
}
/* 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) {
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);
}
}
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;
}
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) {
i = dst->pos;
index = (dst->pos - ELF_NAT_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_NAT_OFFSET, ELF_CR_IIP_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) {
dst->ret = -EIO;
return;
}
if (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)) {
i = dst->pos;
index = (dst->pos - ELF_CR_IIP_OFFSET) / sizeof(elf_greg_t);
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);
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;
}
@ -1913,7 +1811,6 @@ access_uarea(struct task_struct *child, unsigned long addr,
unsigned long *data, int write_access)
{
unsigned int pos = -1; /* an invalid value */
int ret;
unsigned long *ptr, regnum;
if ((addr & 0x7) != 0) {
@ -1945,14 +1842,39 @@ access_uarea(struct task_struct *child, unsigned long addr,
}
if (pos != -1) {
if (write_access)
ret = fpregs_set(child, NULL, pos,
sizeof(unsigned long), data, NULL);
else
ret = fpregs_get(child, NULL, pos,
sizeof(unsigned long), data, NULL);
if (ret != 0)
return -1;
unsigned reg = pos / sizeof(elf_fpreg_t);
int which_half = (pos / sizeof(unsigned long)) & 1;
if (reg < 32) { /* fr2-fr31 */
struct unw_frame_info info;
elf_fpreg_t fpreg;
memset(&info, 0, sizeof(info));
unw_init_from_blocked_task(&info, child);
if (unw_unwind_to_user(&info) < 0)
return 0;
if (unw_get_fr(&info, reg, &fpreg))
return -1;
if (write_access) {
fpreg.u.bits[which_half] = *data;
if (unw_set_fr(&info, reg, fpreg))
return -1;
} else {
*data = fpreg.u.bits[which_half];
}
} else { /* fph */
elf_fpreg_t *p = &child->thread.fph[reg - 32];
unsigned long *bits = &p->u.bits[which_half];
ia64_sync_fph(child);
if (write_access)
*bits = *data;
else if (child->thread.flags & IA64_THREAD_FPH_VALID)
*data = *bits;
else
*data = 0;
}
return 0;
}
@ -2038,15 +1960,14 @@ access_uarea(struct task_struct *child, unsigned long addr,
}
if (pos != -1) {
if (write_access)
ret = gpregs_set(child, NULL, pos,
sizeof(unsigned long), data, NULL);
else
ret = gpregs_get(child, NULL, pos,
sizeof(unsigned long), data, NULL);
if (ret != 0)
return -1;
return 0;
struct unw_frame_info info;
memset(&info, 0, sizeof(info));
unw_init_from_blocked_task(&info, child);
if (unw_unwind_to_user(&info) < 0)
return 0;
return access_elf_reg(child, &info, pos, data, write_access);
}
/* access debug registers */

226
arch/sparc/kernel/ptrace_32.c
View File

@ -99,15 +99,13 @@ static int genregs32_get(struct task_struct *target,
if (ret || !count)
return ret;
if (pos < 32 * sizeof(u32)) {
if (regwindow32_get(target, regs, uregs))
return -EFAULT;
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
uregs,
16 * sizeof(u32), 32 * sizeof(u32));
if (ret || !count)
return ret;
}
if (regwindow32_get(target, regs, uregs))
return -EFAULT;
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
uregs,
16 * sizeof(u32), 32 * sizeof(u32));
if (ret)
return ret;
uregs[0] = regs->psr;
uregs[1] = regs->pc;
@ -139,19 +137,18 @@ static int genregs32_set(struct task_struct *target,
if (ret || !count)
return ret;
if (pos < 32 * sizeof(u32)) {
if (regwindow32_get(target, regs, uregs))
return -EFAULT;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
uregs,
16 * sizeof(u32), 32 * sizeof(u32));
if (ret)
return ret;
if (regwindow32_set(target, regs, uregs))
return -EFAULT;
if (!count)
return 0;
}
if (regwindow32_get(target, regs, uregs))
return -EFAULT;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
uregs,
16 * sizeof(u32), 32 * sizeof(u32));
if (ret)
return ret;
if (regwindow32_set(target, regs, uregs))
return -EFAULT;
if (!count)
return 0;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&psr,
32 * sizeof(u32), 33 * sizeof(u32));
@ -243,13 +240,11 @@ static int fpregs32_set(struct task_struct *target,
user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
32 * sizeof(u32),
33 * sizeof(u32));
if (!ret && count > 0) {
if (!ret)
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&target->thread.fsr,
33 * sizeof(u32),
34 * sizeof(u32));
}
if (!ret)
ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
34 * sizeof(u32), -1);
@ -288,6 +283,125 @@ static const struct user_regset sparc32_regsets[] = {
},
};
static int getregs_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 = target->thread.kregs;
u32 v[4];
int ret;
if (target == current)
flush_user_windows();
v[0] = regs->psr;
v[1] = regs->pc;
v[2] = regs->npc;
v[3] = regs->y;
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
v,
0 * sizeof(u32), 4 * sizeof(u32));
if (ret)
return ret;
return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
regs->u_regs + 1,
4 * sizeof(u32), 19 * sizeof(u32));
}
static int setregs_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 = target->thread.kregs;
u32 v[4];
int ret;
if (target == current)
flush_user_windows();
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
v,
0, 4 * sizeof(u32));
if (ret)
return ret;
regs->psr = (regs->psr & ~(PSR_ICC | PSR_SYSCALL)) |
(v[0] & (PSR_ICC | PSR_SYSCALL));
regs->pc = v[1];
regs->npc = v[2];
regs->y = v[3];
return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
regs->u_regs + 1,
4 * sizeof(u32) , 19 * sizeof(u32));
}
static int getfpregs_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
{
const unsigned long *fpregs = target->thread.float_regs;
int ret = 0;
#if 0
if (target == current)
save_and_clear_fpu();
#endif
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
fpregs,
0, 32 * sizeof(u32));
if (ret)
return ret;
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
&target->thread.fsr,
32 * sizeof(u32), 33 * sizeof(u32));
if (ret)
return ret;
return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
33 * sizeof(u32), 68 * sizeof(u32));
}
static int setfpregs_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
unsigned long *fpregs = target->thread.float_regs;
int ret;
#if 0
if (target == current)
save_and_clear_fpu();
#endif
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
fpregs,
0, 32 * sizeof(u32));
if (ret)
return ret;
return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&target->thread.fsr,
32 * sizeof(u32),
33 * sizeof(u32));
}
static const struct user_regset ptrace32_regsets[] = {
[REGSET_GENERAL] = {
.n = 19, .size = sizeof(u32),
.get = getregs_get, .set = setregs_set,
},
[REGSET_FP] = {
.n = 68, .size = sizeof(u32),
.get = getfpregs_get, .set = setfpregs_set,
},
};
static const struct user_regset_view ptrace32_view = {
.regsets = ptrace32_regsets, .n = ARRAY_SIZE(ptrace32_regsets)
};
static const struct user_regset_view user_sparc32_view = {
.name = "sparc", .e_machine = EM_SPARC,
.regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
@ -315,74 +429,44 @@ long arch_ptrace(struct task_struct *child, long request,
{
unsigned long addr2 = current->thread.kregs->u_regs[UREG_I4];
void __user *addr2p;
const struct user_regset_view *view;
struct pt_regs __user *pregs;
struct fps __user *fps;
int ret;
view = task_user_regset_view(current);
addr2p = (void __user *) addr2;
pregs = (struct pt_regs __user *) addr;
fps = (struct fps __user *) addr;
switch(request) {
case PTRACE_GETREGS: {
ret = copy_regset_to_user(child, view, REGSET_GENERAL,
32 * sizeof(u32),
4 * sizeof(u32),
&pregs->psr);
if (!ret)
copy_regset_to_user(child, view, REGSET_GENERAL,
1 * sizeof(u32),
15 * sizeof(u32),
&pregs->u_regs[0]);
ret = copy_regset_to_user(child, &ptrace32_view,
REGSET_GENERAL, 0,
19 * sizeof(u32),
pregs);
break;
}
case PTRACE_SETREGS: {
ret = copy_regset_from_user(child, view, REGSET_GENERAL,
32 * sizeof(u32),
4 * sizeof(u32),
&pregs->psr);
if (!ret)
copy_regset_from_user(child, view, REGSET_GENERAL,
1 * sizeof(u32),
15 * sizeof(u32),
&pregs->u_regs[0]);
ret = copy_regset_from_user(child, &ptrace32_view,
REGSET_GENERAL, 0,
19 * sizeof(u32),
pregs);
break;
}
case PTRACE_GETFPREGS: {
ret = copy_regset_to_user(child, view, REGSET_FP,
0 * sizeof(u32),
32 * sizeof(u32),
&fps->regs[0]);
if (!ret)
ret = copy_regset_to_user(child, view, REGSET_FP,
33 * sizeof(u32),
1 * sizeof(u32),
&fps->fsr);
if (!ret) {
if (__put_user(0, &fps->fpqd) ||
__put_user(0, &fps->flags) ||
__put_user(0, &fps->extra) ||
clear_user(fps->fpq, sizeof(fps->fpq)))
ret = -EFAULT;
}
ret = copy_regset_to_user(child, &ptrace32_view,
REGSET_FP, 0,
68 * sizeof(u32),
fps);
break;
}
case PTRACE_SETFPREGS: {
ret = copy_regset_from_user(child, view, REGSET_FP,
0 * sizeof(u32),
32 * sizeof(u32),
&fps->regs[0]);
if (!ret)
ret = copy_regset_from_user(child, view, REGSET_FP,
33 * sizeof(u32),
1 * sizeof(u32),
&fps->fsr);
ret = copy_regset_from_user(child, &ptrace32_view,
REGSET_FP, 0,
33 * sizeof(u32),
fps);
break;
}

401
arch/sparc/kernel/ptrace_64.c
View File

@ -258,7 +258,7 @@ static int genregs64_get(struct task_struct *target,
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
regs->u_regs,
0, 16 * sizeof(u64));
if (!ret && count && pos < (32 * sizeof(u64))) {
if (!ret && count) {
struct reg_window window;
if (regwindow64_get(target, regs, &window))
@ -506,6 +506,112 @@ static const struct user_regset sparc64_regsets[] = {
},
};
static int getregs64_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;
if (target == current)
flushw_user();
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
regs->u_regs + 1,
0, 15 * sizeof(u64));
if (!ret)
ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
15 * sizeof(u64), 16 * sizeof(u64));
if (!ret) {
/* TSTATE, TPC, TNPC */
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
&regs->tstate,
16 * sizeof(u64),
19 * sizeof(u64));
}
if (!ret) {
unsigned long y = regs->y;
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
&y,
19 * sizeof(u64),
20 * sizeof(u64));
}
return ret;
}
static int setregs64_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);
unsigned long y = regs->y;
unsigned long tstate;
int ret;
if (target == current)
flushw_user();
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
regs->u_regs + 1,
0 * sizeof(u64),
15 * sizeof(u64));
if (ret)
return ret;
ret =user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
15 * sizeof(u64), 16 * sizeof(u64));
if (ret)
return ret;
/* TSTATE */
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&tstate,
16 * sizeof(u64),
17 * sizeof(u64));
if (ret)
return ret;
/* Only the condition codes and the "in syscall"
* state can be modified in the %tstate register.
*/
tstate &= (TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
regs->tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
regs->tstate |= tstate;
/* TPC, TNPC */
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&regs->tpc,
17 * sizeof(u64),
19 * sizeof(u64));
if (ret)
return ret;
/* Y */
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&y,
19 * sizeof(u64),
20 * sizeof(u64));
if (!ret)
regs->y = y;
return ret;
}
static const struct user_regset ptrace64_regsets[] = {
/* Format is:
* G1 --> G7
* O0 --> O7
* 0
* TSTATE, TPC, TNPC, Y
*/
[REGSET_GENERAL] = {
.n = 20, .size = sizeof(u64),
.get = getregs64_get, .set = setregs64_set,
},
};
static const struct user_regset_view ptrace64_view = {
.regsets = ptrace64_regsets, .n = ARRAY_SIZE(ptrace64_regsets)
};
static const struct user_regset_view user_sparc64_view = {
.name = "sparc64", .e_machine = EM_SPARCV9,
.regsets = sparc64_regsets, .n = ARRAY_SIZE(sparc64_regsets)
@ -518,10 +624,10 @@ static int genregs32_get(struct task_struct *target,
void *kbuf, void __user *ubuf)
{
const struct pt_regs *regs = task_pt_regs(target);
compat_ulong_t __user *reg_window;
compat_ulong_t *k = kbuf;
compat_ulong_t __user *u = ubuf;
compat_ulong_t reg;
u32 uregs[16];
u32 reg;
if (target == current)
flushw_user();
@ -533,52 +639,25 @@ static int genregs32_get(struct task_struct *target,
for (; count > 0 && pos < 16; count--)
*k++ = regs->u_regs[pos++];
reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
reg_window -= 16;
if (target == current) {
for (; count > 0 && pos < 32; count--) {
if (get_user(*k++, &reg_window[pos++]))
return -EFAULT;
}
} else {
for (; count > 0 && pos < 32; count--) {
if (access_process_vm(target,
(unsigned long)
&reg_window[pos],
k, sizeof(*k),
FOLL_FORCE)
!= sizeof(*k))
return -EFAULT;
k++;
pos++;
}
if (count) {
if (get_from_target(target, regs->u_regs[UREG_I6],
uregs, sizeof(uregs)))
return -EFAULT;
for (; count > 0 && pos < 32; count--)
*k++ = uregs[pos++ - 16];
}
} else {
for (; count > 0 && pos < 16; count--) {
for (; count > 0 && pos < 16; count--)
if (put_user((compat_ulong_t) regs->u_regs[pos++], u++))
return -EFAULT;
}
reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
reg_window -= 16;
if (target == current) {
for (; count > 0 && pos < 32; count--) {
if (get_user(reg, &reg_window[pos++]) ||
put_user(reg, u++))
if (count) {
if (get_from_target(target, regs->u_regs[UREG_I6],
uregs, sizeof(uregs)))
return -EFAULT;
for (; count > 0 && pos < 32; count--)
if (put_user(uregs[pos++ - 16], u++))
return -EFAULT;
}
} else {
for (; count > 0 && pos < 32; count--) {
if (access_process_vm(target,
(unsigned long)
&reg_window[pos++],
&reg, sizeof(reg),
FOLL_FORCE)
!= sizeof(reg))
return -EFAULT;
if (put_user(reg, u++))
return -EFAULT;
}
}
}
while (count > 0) {
@ -867,6 +946,150 @@ static const struct user_regset sparc32_regsets[] = {
},
};
static int getregs_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);
u32 uregs[19];
int i;
if (target == current)
flushw_user();
uregs[0] = tstate_to_psr(regs->tstate);
uregs[1] = regs->tpc;
uregs[2] = regs->tnpc;
uregs[3] = regs->y;
for (i = 1; i < 16; i++)
uregs[3 + i] = regs->u_regs[i];
return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
uregs,
0, 19 * sizeof(u32));
}
static int setregs_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);
unsigned long tstate;
u32 uregs[19];
int i, ret;
if (target == current)
flushw_user();
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
uregs,
0, 19 * sizeof(u32));
if (ret)
return ret;
tstate = regs->tstate;
tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
tstate |= psr_to_tstate_icc(uregs[0]);
if (uregs[0] & PSR_SYSCALL)
tstate |= TSTATE_SYSCALL;
regs->tstate = tstate;
regs->tpc = uregs[1];
regs->tnpc = uregs[2];
regs->y = uregs[3];
for (i = 1; i < 15; i++)
regs->u_regs[i] = uregs[3 + i];
return 0;
}
static int getfpregs_get(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
{
const unsigned long *fpregs = task_thread_info(target)->fpregs;
unsigned long fprs;
compat_ulong_t fsr;
int ret = 0;
if (target == current)
save_and_clear_fpu();
fprs = task_thread_info(target)->fpsaved[0];
if (fprs & FPRS_FEF) {
fsr = task_thread_info(target)->xfsr[0];
} else {
fsr = 0;
}
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
fpregs,
0, 32 * sizeof(u32));
if (!ret)
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
&fsr,
32 * sizeof(u32),
33 * sizeof(u32));
if (!ret)
ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
33 * sizeof(u32), 68 * sizeof(u32));
return ret;
}
static int setfpregs_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
unsigned long *fpregs = task_thread_info(target)->fpregs;
unsigned long fprs;
int ret;
if (target == current)
save_and_clear_fpu();
fprs = task_thread_info(target)->fpsaved[0];
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
fpregs,
0, 32 * sizeof(u32));
if (!ret) {
compat_ulong_t fsr;
unsigned long val;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&fsr,
32 * sizeof(u32),
33 * sizeof(u32));
if (!ret) {
val = task_thread_info(target)->xfsr[0];
val &= 0xffffffff00000000UL;
val |= fsr;
task_thread_info(target)->xfsr[0] = val;
}
}
fprs |= (FPRS_FEF | FPRS_DL);
task_thread_info(target)->fpsaved[0] = fprs;
return ret;
}
static const struct user_regset ptrace32_regsets[] = {
[REGSET_GENERAL] = {
.n = 19, .size = sizeof(u32),
.get = getregs_get, .set = setregs_set,
},
[REGSET_FP] = {
.n = 68, .size = sizeof(u32),
.get = getfpregs_get, .set = setfpregs_set,
},
};
static const struct user_regset_view ptrace32_view = {
.regsets = ptrace32_regsets, .n = ARRAY_SIZE(ptrace32_regsets)
};
static const struct user_regset_view user_sparc32_view = {
.name = "sparc", .e_machine = EM_SPARC,
.regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
@ -898,7 +1121,6 @@ struct compat_fps {
long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
compat_ulong_t caddr, compat_ulong_t cdata)
{
const struct user_regset_view *view = task_user_regset_view(current);
compat_ulong_t caddr2 = task_pt_regs(current)->u_regs[UREG_I4];
struct pt_regs32 __user *pregs;
struct compat_fps __user *fps;
@ -916,58 +1138,31 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
break;
case PTRACE_GETREGS:
ret = copy_regset_to_user(child, view, REGSET_GENERAL,
32 * sizeof(u32),
4 * sizeof(u32),
&pregs->psr);
if (!ret)
ret = copy_regset_to_user(child, view, REGSET_GENERAL,
1 * sizeof(u32),
15 * sizeof(u32),
&pregs->u_regs[0]);
ret = copy_regset_to_user(child, &ptrace32_view,
REGSET_GENERAL, 0,
19 * sizeof(u32),
pregs);
break;
case PTRACE_SETREGS:
ret = copy_regset_from_user(child, view, REGSET_GENERAL,
32 * sizeof(u32),
4 * sizeof(u32),
&pregs->psr);
if (!ret)
ret = copy_regset_from_user(child, view, REGSET_GENERAL,
1 * sizeof(u32),
15 * sizeof(u32),
&pregs->u_regs[0]);
ret = copy_regset_from_user(child, &ptrace32_view,
REGSET_GENERAL, 0,
19 * sizeof(u32),
pregs);
break;
case PTRACE_GETFPREGS:
ret = copy_regset_to_user(child, view, REGSET_FP,
0 * sizeof(u32),
32 * sizeof(u32),
&fps->regs[0]);
if (!ret)
ret = copy_regset_to_user(child, view, REGSET_FP,
33 * sizeof(u32),
1 * sizeof(u32),
&fps->fsr);
if (!ret) {
if (__put_user(0, &fps->flags) ||
__put_user(0, &fps->extra) ||
__put_user(0, &fps->fpqd) ||
clear_user(&fps->fpq[0], 32 * sizeof(unsigned int)))
ret = -EFAULT;
}
ret = copy_regset_to_user(child, &ptrace32_view,
REGSET_FP, 0,
68 * sizeof(u32),
fps);
break;
case PTRACE_SETFPREGS:
ret = copy_regset_from_user(child, view, REGSET_FP,
0 * sizeof(u32),
32 * sizeof(u32),
&fps->regs[0]);
if (!ret)
ret = copy_regset_from_user(child, view, REGSET_FP,
33 * sizeof(u32),
1 * sizeof(u32),
&fps->fsr);
ret = copy_regset_from_user(child, &ptrace32_view,
REGSET_FP, 0,
33 * sizeof(u32),
fps);
break;
case PTRACE_READTEXT:
@ -1026,31 +1221,17 @@ long arch_ptrace(struct task_struct *child, long request,
break;
case PTRACE_GETREGS64:
ret = copy_regset_to_user(child, view, REGSET_GENERAL,
1 * sizeof(u64),
15 * sizeof(u64),
&pregs->u_regs[0]);
if (!ret) {
/* XXX doesn't handle 'y' register correctly XXX */
ret = copy_regset_to_user(child, view, REGSET_GENERAL,
32 * sizeof(u64),
4 * sizeof(u64),
&pregs->tstate);
}
ret = copy_regset_to_user(child, &ptrace64_view,
REGSET_GENERAL, 0,
19 * sizeof(u64),
pregs);
break;
case PTRACE_SETREGS64:
ret = copy_regset_from_user(child, view, REGSET_GENERAL,
1 * sizeof(u64),
15 * sizeof(u64),
&pregs->u_regs[0]);
if (!ret) {
/* XXX doesn't handle 'y' register correctly XXX */
ret = copy_regset_from_user(child, view, REGSET_GENERAL,
32 * sizeof(u64),
4 * sizeof(u64),
&pregs->tstate);
}
ret = copy_regset_from_user(child, &ptrace64_view,
REGSET_GENERAL, 0,
19 * sizeof(u64),
pregs);
break;
case PTRACE_GETFPREGS64:

1
arch/x86/include/asm/fpu/internal.h
View File

@ -34,7 +34,6 @@ extern int fpu__copy(struct task_struct *dst, struct task_struct *src);
extern void fpu__clear_user_states(struct fpu *fpu);
extern void fpu__clear_all(struct fpu *fpu);
extern int fpu__exception_code(struct fpu *fpu, int trap_nr);
extern int dump_fpu(struct pt_regs *ptregs, struct user_i387_struct *fpstate);
/*
* Boot time FPU initialization functions:

16
arch/x86/kernel/fpu/regset.c
View File

@ -356,20 +356,4 @@ int fpregs_set(struct task_struct *target, const struct user_regset *regset,
return ret;
}
/*
* FPU state for core dumps.
* This is only used for a.out dumps now.
* It is declared generically using elf_fpregset_t (which is
* struct user_i387_struct) but is in fact only used for 32-bit
* dumps, so on 64-bit it is really struct user_i387_ia32_struct.
*/
int dump_fpu(struct pt_regs *regs, struct user_i387_struct *ufpu)
{
struct task_struct *tsk = current;
return !fpregs_get(tsk, NULL, 0, sizeof(struct user_i387_ia32_struct),
ufpu, NULL);
}
EXPORT_SYMBOL(dump_fpu);
#endif /* CONFIG_X86_32 || CONFIG_IA32_EMULATION */

12
arch/x86/kernel/fpu/signal.c
View File

@ -170,14 +170,14 @@ int copy_fpstate_to_sigframe(void __user *buf, void __user *buf_fx, int size)
ia32_fxstate &= (IS_ENABLED(CONFIG_X86_32) ||
IS_ENABLED(CONFIG_IA32_EMULATION));
if (!static_cpu_has(X86_FEATURE_FPU)) {
struct user_i387_ia32_struct fp;
fpregs_soft_get(current, NULL, 0, sizeof(fp), &fp, NULL);
return copy_to_user(buf, &fp, sizeof(fp)) ? -EFAULT : 0;
}
if (!access_ok(buf, size))
return -EACCES;
if (!static_cpu_has(X86_FEATURE_FPU))
return fpregs_soft_get(current, NULL, 0,
sizeof(struct user_i387_ia32_struct), NULL,
(struct _fpstate_32 __user *) buf) ? -1 : 1;
retry:
/*
* Load the FPU registers if they are not valid for the current task.