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-rw-r--r--arch/s390/kernel/ptrace.c850
1 files changed, 123 insertions, 727 deletions
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 0ea3d02b378d..ceaa1726e328 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -7,10 +7,10 @@
* Martin Schwidefsky (schwidefsky@de.ibm.com)
*/
-#include "asm/ptrace.h"
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/sched/task_stack.h>
+#include <linux/cpufeature.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/errno.h>
@@ -21,38 +21,44 @@
#include <linux/signal.h>
#include <linux/elf.h>
#include <linux/regset.h>
-#include <linux/tracehook.h>
#include <linux/seccomp.h>
-#include <linux/compat.h>
#include <trace/syscall.h>
+#include <asm/guarded_storage.h>
+#include <asm/access-regs.h>
#include <asm/page.h>
#include <linux/uaccess.h>
#include <asm/unistd.h>
-#include <asm/switch_to.h>
#include <asm/runtime_instr.h>
#include <asm/facility.h>
+#include <asm/machine.h>
+#include <asm/ptrace.h>
+#include <asm/rwonce.h>
+#include <asm/fpu.h>
#include "entry.h"
-#ifdef CONFIG_COMPAT
-#include "compat_ptrace.h"
-#endif
-
void update_cr_regs(struct task_struct *task)
{
struct pt_regs *regs = task_pt_regs(task);
struct thread_struct *thread = &task->thread;
- struct per_regs old, new;
union ctlreg0 cr0_old, cr0_new;
union ctlreg2 cr2_old, cr2_new;
int cr0_changed, cr2_changed;
-
- __ctl_store(cr0_old.val, 0, 0);
- __ctl_store(cr2_old.val, 2, 2);
+ union {
+ struct ctlreg regs[3];
+ struct {
+ struct ctlreg control;
+ struct ctlreg start;
+ struct ctlreg end;
+ };
+ } old, new;
+
+ local_ctl_store(0, &cr0_old.reg);
+ local_ctl_store(2, &cr2_old.reg);
cr0_new = cr0_old;
cr2_new = cr2_old;
/* Take care of the enable/disable of transactional execution. */
- if (MACHINE_HAS_TE) {
+ if (machine_has_tx()) {
/* Set or clear transaction execution TXC bit 8. */
cr0_new.tcx = 1;
if (task->thread.per_flags & PER_FLAG_NO_TE)
@@ -67,7 +73,7 @@ void update_cr_regs(struct task_struct *task)
}
}
/* Take care of enable/disable of guarded storage. */
- if (MACHINE_HAS_GS) {
+ if (cpu_has_gs()) {
cr2_new.gse = 0;
if (task->thread.gs_cb)
cr2_new.gse = 1;
@@ -76,38 +82,38 @@ void update_cr_regs(struct task_struct *task)
cr0_changed = cr0_new.val != cr0_old.val;
cr2_changed = cr2_new.val != cr2_old.val;
if (cr0_changed)
- __ctl_load(cr0_new.val, 0, 0);
+ local_ctl_load(0, &cr0_new.reg);
if (cr2_changed)
- __ctl_load(cr2_new.val, 2, 2);
+ local_ctl_load(2, &cr2_new.reg);
/* Copy user specified PER registers */
- new.control = thread->per_user.control;
- new.start = thread->per_user.start;
- new.end = thread->per_user.end;
+ new.control.val = thread->per_user.control;
+ new.start.val = thread->per_user.start;
+ new.end.val = thread->per_user.end;
/* merge TIF_SINGLE_STEP into user specified PER registers. */
if (test_tsk_thread_flag(task, TIF_SINGLE_STEP) ||
test_tsk_thread_flag(task, TIF_UPROBE_SINGLESTEP)) {
if (test_tsk_thread_flag(task, TIF_BLOCK_STEP))
- new.control |= PER_EVENT_BRANCH;
+ new.control.val |= PER_EVENT_BRANCH;
else
- new.control |= PER_EVENT_IFETCH;
- new.control |= PER_CONTROL_SUSPENSION;
- new.control |= PER_EVENT_TRANSACTION_END;
+ new.control.val |= PER_EVENT_IFETCH;
+ new.control.val |= PER_CONTROL_SUSPENSION;
+ new.control.val |= PER_EVENT_TRANSACTION_END;
if (test_tsk_thread_flag(task, TIF_UPROBE_SINGLESTEP))
- new.control |= PER_EVENT_IFETCH;
- new.start = 0;
- new.end = -1UL;
+ new.control.val |= PER_EVENT_IFETCH;
+ new.start.val = 0;
+ new.end.val = -1UL;
}
/* Take care of the PER enablement bit in the PSW. */
- if (!(new.control & PER_EVENT_MASK)) {
+ if (!(new.control.val & PER_EVENT_MASK)) {
regs->psw.mask &= ~PSW_MASK_PER;
return;
}
regs->psw.mask |= PSW_MASK_PER;
- __ctl_store(old, 9, 11);
+ __local_ctl_store(9, 11, old.regs);
if (memcmp(&new, &old, sizeof(struct per_regs)) != 0)
- __ctl_load(new, 9, 11);
+ __local_ctl_load(9, 11, new.regs);
}
void user_enable_single_step(struct task_struct *task)
@@ -147,38 +153,36 @@ void ptrace_disable(struct task_struct *task)
static inline unsigned long __peek_user_per(struct task_struct *child,
addr_t addr)
{
- struct per_struct_kernel *dummy = NULL;
-
- if (addr == (addr_t) &dummy->cr9)
+ if (addr == offsetof(struct per_struct_kernel, cr9))
/* Control bits of the active per set. */
return test_thread_flag(TIF_SINGLE_STEP) ?
PER_EVENT_IFETCH : child->thread.per_user.control;
- else if (addr == (addr_t) &dummy->cr10)
+ else if (addr == offsetof(struct per_struct_kernel, cr10))
/* Start address of the active per set. */
return test_thread_flag(TIF_SINGLE_STEP) ?
0 : child->thread.per_user.start;
- else if (addr == (addr_t) &dummy->cr11)
+ else if (addr == offsetof(struct per_struct_kernel, cr11))
/* End address of the active per set. */
return test_thread_flag(TIF_SINGLE_STEP) ?
-1UL : child->thread.per_user.end;
- else if (addr == (addr_t) &dummy->bits)
+ else if (addr == offsetof(struct per_struct_kernel, bits))
/* Single-step bit. */
return test_thread_flag(TIF_SINGLE_STEP) ?
(1UL << (BITS_PER_LONG - 1)) : 0;
- else if (addr == (addr_t) &dummy->starting_addr)
+ else if (addr == offsetof(struct per_struct_kernel, starting_addr))
/* Start address of the user specified per set. */
return child->thread.per_user.start;
- else if (addr == (addr_t) &dummy->ending_addr)
+ else if (addr == offsetof(struct per_struct_kernel, ending_addr))
/* End address of the user specified per set. */
return child->thread.per_user.end;
- else if (addr == (addr_t) &dummy->perc_atmid)
+ else if (addr == offsetof(struct per_struct_kernel, perc_atmid))
/* PER code, ATMID and AI of the last PER trap */
return (unsigned long)
child->thread.per_event.cause << (BITS_PER_LONG - 16);
- else if (addr == (addr_t) &dummy->address)
+ else if (addr == offsetof(struct per_struct_kernel, address))
/* Address of the last PER trap */
return child->thread.per_event.address;
- else if (addr == (addr_t) &dummy->access_id)
+ else if (addr == offsetof(struct per_struct_kernel, access_id))
/* Access id of the last PER trap */
return (unsigned long)
child->thread.per_event.paid << (BITS_PER_LONG - 8);
@@ -196,73 +200,65 @@ static inline unsigned long __peek_user_per(struct task_struct *child,
*/
static unsigned long __peek_user(struct task_struct *child, addr_t addr)
{
- struct user *dummy = NULL;
addr_t offset, tmp;
- if (addr < (addr_t) &dummy->regs.acrs) {
+ if (addr < offsetof(struct user, regs.acrs)) {
/*
* psw and gprs are stored on the stack
*/
tmp = *(addr_t *)((addr_t) &task_pt_regs(child)->psw + addr);
- if (addr == (addr_t) &dummy->regs.psw.mask) {
+ if (addr == offsetof(struct user, regs.psw.mask)) {
/* Return a clean psw mask. */
tmp &= PSW_MASK_USER | PSW_MASK_RI;
tmp |= PSW_USER_BITS;
}
- } else if (addr < (addr_t) &dummy->regs.orig_gpr2) {
+ } else if (addr < offsetof(struct user, regs.orig_gpr2)) {
/*
* access registers are stored in the thread structure
*/
- offset = addr - (addr_t) &dummy->regs.acrs;
+ offset = addr - offsetof(struct user, regs.acrs);
/*
* Very special case: old & broken 64 bit gdb reading
* from acrs[15]. Result is a 64 bit value. Read the
* 32 bit acrs[15] value and shift it by 32. Sick...
*/
- if (addr == (addr_t) &dummy->regs.acrs[15])
+ if (addr == offsetof(struct user, regs.acrs[15]))
tmp = ((unsigned long) child->thread.acrs[15]) << 32;
else
tmp = *(addr_t *)((addr_t) &child->thread.acrs + offset);
- } else if (addr == (addr_t) &dummy->regs.orig_gpr2) {
+ } else if (addr == offsetof(struct user, regs.orig_gpr2)) {
/*
* orig_gpr2 is stored on the kernel stack
*/
tmp = (addr_t) task_pt_regs(child)->orig_gpr2;
- } else if (addr < (addr_t) &dummy->regs.fp_regs) {
+ } else if (addr < offsetof(struct user, regs.fp_regs)) {
/*
* prevent reads of padding hole between
* orig_gpr2 and fp_regs on s390.
*/
tmp = 0;
- } else if (addr == (addr_t) &dummy->regs.fp_regs.fpc) {
+ } else if (addr == offsetof(struct user, regs.fp_regs.fpc)) {
/*
* floating point control reg. is in the thread structure
*/
- tmp = child->thread.fpu.fpc;
+ tmp = child->thread.ufpu.fpc;
tmp <<= BITS_PER_LONG - 32;
- } else if (addr < (addr_t) (&dummy->regs.fp_regs + 1)) {
+ } else if (addr < offsetof(struct user, regs.fp_regs) + sizeof(s390_fp_regs)) {
/*
- * floating point regs. are either in child->thread.fpu
- * or the child->thread.fpu.vxrs array
+ * floating point regs. are in the child->thread.ufpu.vxrs array
*/
- offset = addr - (addr_t) &dummy->regs.fp_regs.fprs;
- if (MACHINE_HAS_VX)
- tmp = *(addr_t *)
- ((addr_t) child->thread.fpu.vxrs + 2*offset);
- else
- tmp = *(addr_t *)
- ((addr_t) child->thread.fpu.fprs + offset);
-
- } else if (addr < (addr_t) (&dummy->regs.per_info + 1)) {
+ offset = addr - offsetof(struct user, regs.fp_regs.fprs);
+ tmp = *(addr_t *)((addr_t)child->thread.ufpu.vxrs + 2 * offset);
+ } else if (addr < offsetof(struct user, regs.per_info) + sizeof(per_struct)) {
/*
* Handle access to the per_info structure.
*/
- addr -= (addr_t) &dummy->regs.per_info;
+ addr -= offsetof(struct user, regs.per_info);
tmp = __peek_user_per(child, addr);
} else
@@ -281,8 +277,8 @@ peek_user(struct task_struct *child, addr_t addr, addr_t data)
* an alignment of 4. Programmers from hell...
*/
mask = __ADDR_MASK;
- if (addr >= (addr_t) &((struct user *) NULL)->regs.acrs &&
- addr < (addr_t) &((struct user *) NULL)->regs.orig_gpr2)
+ if (addr >= offsetof(struct user, regs.acrs) &&
+ addr < offsetof(struct user, regs.orig_gpr2))
mask = 3;
if ((addr & mask) || addr > sizeof(struct user) - __ADDR_MASK)
return -EIO;
@@ -294,8 +290,6 @@ peek_user(struct task_struct *child, addr_t addr, addr_t data)
static inline void __poke_user_per(struct task_struct *child,
addr_t addr, addr_t data)
{
- struct per_struct_kernel *dummy = NULL;
-
/*
* There are only three fields in the per_info struct that the
* debugger user can write to.
@@ -308,14 +302,14 @@ static inline void __poke_user_per(struct task_struct *child,
* addresses are used only if single stepping is not in effect.
* Writes to any other field in per_info are ignored.
*/
- if (addr == (addr_t) &dummy->cr9)
+ if (addr == offsetof(struct per_struct_kernel, cr9))
/* PER event mask of the user specified per set. */
child->thread.per_user.control =
data & (PER_EVENT_MASK | PER_CONTROL_MASK);
- else if (addr == (addr_t) &dummy->starting_addr)
+ else if (addr == offsetof(struct per_struct_kernel, starting_addr))
/* Starting address of the user specified per set. */
child->thread.per_user.start = data;
- else if (addr == (addr_t) &dummy->ending_addr)
+ else if (addr == offsetof(struct per_struct_kernel, ending_addr))
/* Ending address of the user specified per set. */
child->thread.per_user.end = data;
}
@@ -328,16 +322,15 @@ static inline void __poke_user_per(struct task_struct *child,
*/
static int __poke_user(struct task_struct *child, addr_t addr, addr_t data)
{
- struct user *dummy = NULL;
addr_t offset;
- if (addr < (addr_t) &dummy->regs.acrs) {
+ if (addr < offsetof(struct user, regs.acrs)) {
struct pt_regs *regs = task_pt_regs(child);
/*
* psw and gprs are stored on the stack
*/
- if (addr == (addr_t) &dummy->regs.psw.mask) {
+ if (addr == offsetof(struct user, regs.psw.mask)) {
unsigned long mask = PSW_MASK_USER;
mask |= is_ri_task(child) ? PSW_MASK_RI : 0;
@@ -359,62 +352,54 @@ static int __poke_user(struct task_struct *child, addr_t addr, addr_t data)
regs->int_code = 0x20000 | (data & 0xffff);
}
*(addr_t *)((addr_t) &regs->psw + addr) = data;
- } else if (addr < (addr_t) (&dummy->regs.orig_gpr2)) {
+ } else if (addr < offsetof(struct user, regs.orig_gpr2)) {
/*
* access registers are stored in the thread structure
*/
- offset = addr - (addr_t) &dummy->regs.acrs;
+ offset = addr - offsetof(struct user, regs.acrs);
/*
* Very special case: old & broken 64 bit gdb writing
* to acrs[15] with a 64 bit value. Ignore the lower
* half of the value and write the upper 32 bit to
* acrs[15]. Sick...
*/
- if (addr == (addr_t) &dummy->regs.acrs[15])
+ if (addr == offsetof(struct user, regs.acrs[15]))
child->thread.acrs[15] = (unsigned int) (data >> 32);
else
*(addr_t *)((addr_t) &child->thread.acrs + offset) = data;
- } else if (addr == (addr_t) &dummy->regs.orig_gpr2) {
+ } else if (addr == offsetof(struct user, regs.orig_gpr2)) {
/*
* orig_gpr2 is stored on the kernel stack
*/
task_pt_regs(child)->orig_gpr2 = data;
- } else if (addr < (addr_t) &dummy->regs.fp_regs) {
+ } else if (addr < offsetof(struct user, regs.fp_regs)) {
/*
* prevent writes of padding hole between
* orig_gpr2 and fp_regs on s390.
*/
return 0;
- } else if (addr == (addr_t) &dummy->regs.fp_regs.fpc) {
+ } else if (addr == offsetof(struct user, regs.fp_regs.fpc)) {
/*
* floating point control reg. is in the thread structure
*/
- if ((unsigned int) data != 0 ||
- test_fp_ctl(data >> (BITS_PER_LONG - 32)))
+ if ((unsigned int)data != 0)
return -EINVAL;
- child->thread.fpu.fpc = data >> (BITS_PER_LONG - 32);
+ child->thread.ufpu.fpc = data >> (BITS_PER_LONG - 32);
- } else if (addr < (addr_t) (&dummy->regs.fp_regs + 1)) {
+ } else if (addr < offsetof(struct user, regs.fp_regs) + sizeof(s390_fp_regs)) {
/*
- * floating point regs. are either in child->thread.fpu
- * or the child->thread.fpu.vxrs array
+ * floating point regs. are in the child->thread.ufpu.vxrs array
*/
- offset = addr - (addr_t) &dummy->regs.fp_regs.fprs;
- if (MACHINE_HAS_VX)
- *(addr_t *)((addr_t)
- child->thread.fpu.vxrs + 2*offset) = data;
- else
- *(addr_t *)((addr_t)
- child->thread.fpu.fprs + offset) = data;
-
- } else if (addr < (addr_t) (&dummy->regs.per_info + 1)) {
+ offset = addr - offsetof(struct user, regs.fp_regs.fprs);
+ *(addr_t *)((addr_t)child->thread.ufpu.vxrs + 2 * offset) = data;
+ } else if (addr < offsetof(struct user, regs.per_info) + sizeof(per_struct)) {
/*
* Handle access to the per_info structure.
*/
- addr -= (addr_t) &dummy->regs.per_info;
+ addr -= offsetof(struct user, regs.per_info);
__poke_user_per(child, addr, data);
}
@@ -431,8 +416,8 @@ static int poke_user(struct task_struct *child, addr_t addr, addr_t data)
* an alignment of 4. Programmers from hell indeed...
*/
mask = __ADDR_MASK;
- if (addr >= (addr_t) &((struct user *) NULL)->regs.acrs &&
- addr < (addr_t) &((struct user *) NULL)->regs.orig_gpr2)
+ if (addr >= offsetof(struct user, regs.acrs) &&
+ addr < offsetof(struct user, regs.orig_gpr2))
mask = 3;
if ((addr & mask) || addr > sizeof(struct user) - __ADDR_MASK)
return -EIO;
@@ -481,22 +466,20 @@ long arch_ptrace(struct task_struct *child, long request,
}
return 0;
case PTRACE_GET_LAST_BREAK:
- put_user(child->thread.last_break,
- (unsigned long __user *) data);
- return 0;
+ return put_user(child->thread.last_break, (unsigned long __user *)data);
case PTRACE_ENABLE_TE:
- if (!MACHINE_HAS_TE)
+ if (!machine_has_tx())
return -EIO;
child->thread.per_flags &= ~PER_FLAG_NO_TE;
return 0;
case PTRACE_DISABLE_TE:
- if (!MACHINE_HAS_TE)
+ if (!machine_has_tx())
return -EIO;
child->thread.per_flags |= PER_FLAG_NO_TE;
child->thread.per_flags &= ~PER_FLAG_TE_ABORT_RAND;
return 0;
case PTRACE_TE_ABORT_RAND:
- if (!MACHINE_HAS_TE || (child->thread.per_flags & PER_FLAG_NO_TE))
+ if (!machine_has_tx() || (child->thread.per_flags & PER_FLAG_NO_TE))
return -EIO;
switch (data) {
case 0UL:
@@ -519,332 +502,6 @@ long arch_ptrace(struct task_struct *child, long request,
}
}
-#ifdef CONFIG_COMPAT
-/*
- * Now the fun part starts... a 31 bit program running in the
- * 31 bit emulation tracing another program. PTRACE_PEEKTEXT,
- * PTRACE_PEEKDATA, PTRACE_POKETEXT and PTRACE_POKEDATA are easy
- * to handle, the difference to the 64 bit versions of the requests
- * is that the access is done in multiples of 4 byte instead of
- * 8 bytes (sizeof(unsigned long) on 31/64 bit).
- * The ugly part are PTRACE_PEEKUSR, PTRACE_PEEKUSR_AREA,
- * PTRACE_POKEUSR and PTRACE_POKEUSR_AREA. If the traced program
- * is a 31 bit program too, the content of struct user can be
- * emulated. A 31 bit program peeking into the struct user of
- * a 64 bit program is a no-no.
- */
-
-/*
- * Same as peek_user_per but for a 31 bit program.
- */
-static inline __u32 __peek_user_per_compat(struct task_struct *child,
- addr_t addr)
-{
- struct compat_per_struct_kernel *dummy32 = NULL;
-
- if (addr == (addr_t) &dummy32->cr9)
- /* Control bits of the active per set. */
- return (__u32) test_thread_flag(TIF_SINGLE_STEP) ?
- PER_EVENT_IFETCH : child->thread.per_user.control;
- else if (addr == (addr_t) &dummy32->cr10)
- /* Start address of the active per set. */
- return (__u32) test_thread_flag(TIF_SINGLE_STEP) ?
- 0 : child->thread.per_user.start;
- else if (addr == (addr_t) &dummy32->cr11)
- /* End address of the active per set. */
- return test_thread_flag(TIF_SINGLE_STEP) ?
- PSW32_ADDR_INSN : child->thread.per_user.end;
- else if (addr == (addr_t) &dummy32->bits)
- /* Single-step bit. */
- return (__u32) test_thread_flag(TIF_SINGLE_STEP) ?
- 0x80000000 : 0;
- else if (addr == (addr_t) &dummy32->starting_addr)
- /* Start address of the user specified per set. */
- return (__u32) child->thread.per_user.start;
- else if (addr == (addr_t) &dummy32->ending_addr)
- /* End address of the user specified per set. */
- return (__u32) child->thread.per_user.end;
- else if (addr == (addr_t) &dummy32->perc_atmid)
- /* PER code, ATMID and AI of the last PER trap */
- return (__u32) child->thread.per_event.cause << 16;
- else if (addr == (addr_t) &dummy32->address)
- /* Address of the last PER trap */
- return (__u32) child->thread.per_event.address;
- else if (addr == (addr_t) &dummy32->access_id)
- /* Access id of the last PER trap */
- return (__u32) child->thread.per_event.paid << 24;
- return 0;
-}
-
-/*
- * Same as peek_user but for a 31 bit program.
- */
-static u32 __peek_user_compat(struct task_struct *child, addr_t addr)
-{
- struct compat_user *dummy32 = NULL;
- addr_t offset;
- __u32 tmp;
-
- if (addr < (addr_t) &dummy32->regs.acrs) {
- struct pt_regs *regs = task_pt_regs(child);
- /*
- * psw and gprs are stored on the stack
- */
- if (addr == (addr_t) &dummy32->regs.psw.mask) {
- /* Fake a 31 bit psw mask. */
- tmp = (__u32)(regs->psw.mask >> 32);
- tmp &= PSW32_MASK_USER | PSW32_MASK_RI;
- tmp |= PSW32_USER_BITS;
- } else if (addr == (addr_t) &dummy32->regs.psw.addr) {
- /* Fake a 31 bit psw address. */
- tmp = (__u32) regs->psw.addr |
- (__u32)(regs->psw.mask & PSW_MASK_BA);
- } else {
- /* gpr 0-15 */
- tmp = *(__u32 *)((addr_t) &regs->psw + addr*2 + 4);
- }
- } else if (addr < (addr_t) (&dummy32->regs.orig_gpr2)) {
- /*
- * access registers are stored in the thread structure
- */
- offset = addr - (addr_t) &dummy32->regs.acrs;
- tmp = *(__u32*)((addr_t) &child->thread.acrs + offset);
-
- } else if (addr == (addr_t) (&dummy32->regs.orig_gpr2)) {
- /*
- * orig_gpr2 is stored on the kernel stack
- */
- tmp = *(__u32*)((addr_t) &task_pt_regs(child)->orig_gpr2 + 4);
-
- } else if (addr < (addr_t) &dummy32->regs.fp_regs) {
- /*
- * prevent reads of padding hole between
- * orig_gpr2 and fp_regs on s390.
- */
- tmp = 0;
-
- } else if (addr == (addr_t) &dummy32->regs.fp_regs.fpc) {
- /*
- * floating point control reg. is in the thread structure
- */
- tmp = child->thread.fpu.fpc;
-
- } else if (addr < (addr_t) (&dummy32->regs.fp_regs + 1)) {
- /*
- * floating point regs. are either in child->thread.fpu
- * or the child->thread.fpu.vxrs array
- */
- offset = addr - (addr_t) &dummy32->regs.fp_regs.fprs;
- if (MACHINE_HAS_VX)
- tmp = *(__u32 *)
- ((addr_t) child->thread.fpu.vxrs + 2*offset);
- else
- tmp = *(__u32 *)
- ((addr_t) child->thread.fpu.fprs + offset);
-
- } else if (addr < (addr_t) (&dummy32->regs.per_info + 1)) {
- /*
- * Handle access to the per_info structure.
- */
- addr -= (addr_t) &dummy32->regs.per_info;
- tmp = __peek_user_per_compat(child, addr);
-
- } else
- tmp = 0;
-
- return tmp;
-}
-
-static int peek_user_compat(struct task_struct *child,
- addr_t addr, addr_t data)
-{
- __u32 tmp;
-
- if (!is_compat_task() || (addr & 3) || addr > sizeof(struct user) - 3)
- return -EIO;
-
- tmp = __peek_user_compat(child, addr);
- return put_user(tmp, (__u32 __user *) data);
-}
-
-/*
- * Same as poke_user_per but for a 31 bit program.
- */
-static inline void __poke_user_per_compat(struct task_struct *child,
- addr_t addr, __u32 data)
-{
- struct compat_per_struct_kernel *dummy32 = NULL;
-
- if (addr == (addr_t) &dummy32->cr9)
- /* PER event mask of the user specified per set. */
- child->thread.per_user.control =
- data & (PER_EVENT_MASK | PER_CONTROL_MASK);
- else if (addr == (addr_t) &dummy32->starting_addr)
- /* Starting address of the user specified per set. */
- child->thread.per_user.start = data;
- else if (addr == (addr_t) &dummy32->ending_addr)
- /* Ending address of the user specified per set. */
- child->thread.per_user.end = data;
-}
-
-/*
- * Same as poke_user but for a 31 bit program.
- */
-static int __poke_user_compat(struct task_struct *child,
- addr_t addr, addr_t data)
-{
- struct compat_user *dummy32 = NULL;
- __u32 tmp = (__u32) data;
- addr_t offset;
-
- if (addr < (addr_t) &dummy32->regs.acrs) {
- struct pt_regs *regs = task_pt_regs(child);
- /*
- * psw, gprs, acrs and orig_gpr2 are stored on the stack
- */
- if (addr == (addr_t) &dummy32->regs.psw.mask) {
- __u32 mask = PSW32_MASK_USER;
-
- mask |= is_ri_task(child) ? PSW32_MASK_RI : 0;
- /* Build a 64 bit psw mask from 31 bit mask. */
- if ((tmp ^ PSW32_USER_BITS) & ~mask)
- /* Invalid psw mask. */
- return -EINVAL;
- if ((data & PSW32_MASK_ASC) == PSW32_ASC_HOME)
- /* Invalid address-space-control bits */
- return -EINVAL;
- regs->psw.mask = (regs->psw.mask & ~PSW_MASK_USER) |
- (regs->psw.mask & PSW_MASK_BA) |
- (__u64)(tmp & mask) << 32;
- } else if (addr == (addr_t) &dummy32->regs.psw.addr) {
- /* Build a 64 bit psw address from 31 bit address. */
- regs->psw.addr = (__u64) tmp & PSW32_ADDR_INSN;
- /* Transfer 31 bit amode bit to psw mask. */
- regs->psw.mask = (regs->psw.mask & ~PSW_MASK_BA) |
- (__u64)(tmp & PSW32_ADDR_AMODE);
- } else {
- if (test_pt_regs_flag(regs, PIF_SYSCALL) &&
- addr == offsetof(struct compat_user, regs.gprs[2])) {
- struct pt_regs *regs = task_pt_regs(child);
-
- regs->int_code = 0x20000 | (data & 0xffff);
- }
- /* gpr 0-15 */
- *(__u32*)((addr_t) &regs->psw + addr*2 + 4) = tmp;
- }
- } else if (addr < (addr_t) (&dummy32->regs.orig_gpr2)) {
- /*
- * access registers are stored in the thread structure
- */
- offset = addr - (addr_t) &dummy32->regs.acrs;
- *(__u32*)((addr_t) &child->thread.acrs + offset) = tmp;
-
- } else if (addr == (addr_t) (&dummy32->regs.orig_gpr2)) {
- /*
- * orig_gpr2 is stored on the kernel stack
- */
- *(__u32*)((addr_t) &task_pt_regs(child)->orig_gpr2 + 4) = tmp;
-
- } else if (addr < (addr_t) &dummy32->regs.fp_regs) {
- /*
- * prevent writess of padding hole between
- * orig_gpr2 and fp_regs on s390.
- */
- return 0;
-
- } else if (addr == (addr_t) &dummy32->regs.fp_regs.fpc) {
- /*
- * floating point control reg. is in the thread structure
- */
- if (test_fp_ctl(tmp))
- return -EINVAL;
- child->thread.fpu.fpc = data;
-
- } else if (addr < (addr_t) (&dummy32->regs.fp_regs + 1)) {
- /*
- * floating point regs. are either in child->thread.fpu
- * or the child->thread.fpu.vxrs array
- */
- offset = addr - (addr_t) &dummy32->regs.fp_regs.fprs;
- if (MACHINE_HAS_VX)
- *(__u32 *)((addr_t)
- child->thread.fpu.vxrs + 2*offset) = tmp;
- else
- *(__u32 *)((addr_t)
- child->thread.fpu.fprs + offset) = tmp;
-
- } else if (addr < (addr_t) (&dummy32->regs.per_info + 1)) {
- /*
- * Handle access to the per_info structure.
- */
- addr -= (addr_t) &dummy32->regs.per_info;
- __poke_user_per_compat(child, addr, data);
- }
-
- return 0;
-}
-
-static int poke_user_compat(struct task_struct *child,
- addr_t addr, addr_t data)
-{
- if (!is_compat_task() || (addr & 3) ||
- addr > sizeof(struct compat_user) - 3)
- return -EIO;
-
- return __poke_user_compat(child, addr, data);
-}
-
-long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
- compat_ulong_t caddr, compat_ulong_t cdata)
-{
- unsigned long addr = caddr;
- unsigned long data = cdata;
- compat_ptrace_area parea;
- int copied, ret;
-
- switch (request) {
- case PTRACE_PEEKUSR:
- /* read the word at location addr in the USER area. */
- return peek_user_compat(child, addr, data);
-
- case PTRACE_POKEUSR:
- /* write the word at location addr in the USER area */
- return poke_user_compat(child, addr, data);
-
- case PTRACE_PEEKUSR_AREA:
- case PTRACE_POKEUSR_AREA:
- if (copy_from_user(&parea, (void __force __user *) addr,
- sizeof(parea)))
- return -EFAULT;
- addr = parea.kernel_addr;
- data = parea.process_addr;
- copied = 0;
- while (copied < parea.len) {
- if (request == PTRACE_PEEKUSR_AREA)
- ret = peek_user_compat(child, addr, data);
- else {
- __u32 utmp;
- if (get_user(utmp,
- (__u32 __force __user *) data))
- return -EFAULT;
- ret = poke_user_compat(child, addr, utmp);
- }
- if (ret)
- return ret;
- addr += sizeof(unsigned int);
- data += sizeof(unsigned int);
- copied += sizeof(unsigned int);
- }
- return 0;
- case PTRACE_GET_LAST_BREAK:
- put_user(child->thread.last_break,
- (unsigned int __user *) data);
- return 0;
- }
- return compat_ptrace_request(child, request, addr, data);
-}
-#endif
-
/*
* user_regset definitions.
*/
@@ -905,10 +562,10 @@ static int s390_fpregs_get(struct task_struct *target,
_s390_fp_regs fp_regs;
if (target == current)
- save_fpu_regs();
+ save_user_fpu_regs();
- fp_regs.fpc = target->thread.fpu.fpc;
- fpregs_store(&fp_regs, &target->thread.fpu);
+ fp_regs.fpc = target->thread.ufpu.fpc;
+ fpregs_store(&fp_regs, &target->thread.ufpu);
return membuf_write(&to, &fp_regs, sizeof(fp_regs));
}
@@ -922,23 +579,17 @@ static int s390_fpregs_set(struct task_struct *target,
freg_t fprs[__NUM_FPRS];
if (target == current)
- save_fpu_regs();
-
- if (MACHINE_HAS_VX)
- convert_vx_to_fp(fprs, target->thread.fpu.vxrs);
- else
- memcpy(&fprs, target->thread.fpu.fprs, sizeof(fprs));
-
- /* If setting FPC, must validate it first. */
+ save_user_fpu_regs();
+ convert_vx_to_fp(fprs, target->thread.ufpu.vxrs);
if (count > 0 && pos < offsetof(s390_fp_regs, fprs)) {
- u32 ufpc[2] = { target->thread.fpu.fpc, 0 };
+ u32 ufpc[2] = { target->thread.ufpu.fpc, 0 };
rc = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &ufpc,
0, offsetof(s390_fp_regs, fprs));
if (rc)
return rc;
- if (ufpc[1] != 0 || test_fp_ctl(ufpc[0]))
+ if (ufpc[1] != 0)
return -EINVAL;
- target->thread.fpu.fpc = ufpc[0];
+ target->thread.ufpu.fpc = ufpc[0];
}
if (rc == 0 && count > 0)
@@ -946,12 +597,7 @@ static int s390_fpregs_set(struct task_struct *target,
fprs, offsetof(s390_fp_regs, fprs), -1);
if (rc)
return rc;
-
- if (MACHINE_HAS_VX)
- convert_fp_to_vx(target->thread.fpu.vxrs, fprs);
- else
- memcpy(target->thread.fpu.fprs, &fprs, sizeof(fprs));
-
+ convert_fp_to_vx(target->thread.ufpu.vxrs, fprs);
return rc;
}
@@ -998,12 +644,12 @@ static int s390_vxrs_low_get(struct task_struct *target,
__u64 vxrs[__NUM_VXRS_LOW];
int i;
- if (!MACHINE_HAS_VX)
+ if (!cpu_has_vx())
return -ENODEV;
if (target == current)
- save_fpu_regs();
+ save_user_fpu_regs();
for (i = 0; i < __NUM_VXRS_LOW; i++)
- vxrs[i] = *((__u64 *)(target->thread.fpu.vxrs + i) + 1);
+ vxrs[i] = target->thread.ufpu.vxrs[i].low;
return membuf_write(&to, vxrs, sizeof(vxrs));
}
@@ -1015,18 +661,18 @@ static int s390_vxrs_low_set(struct task_struct *target,
__u64 vxrs[__NUM_VXRS_LOW];
int i, rc;
- if (!MACHINE_HAS_VX)
+ if (!cpu_has_vx())
return -ENODEV;
if (target == current)
- save_fpu_regs();
+ save_user_fpu_regs();
for (i = 0; i < __NUM_VXRS_LOW; i++)
- vxrs[i] = *((__u64 *)(target->thread.fpu.vxrs + i) + 1);
+ vxrs[i] = target->thread.ufpu.vxrs[i].low;
rc = user_regset_copyin(&pos, &count, &kbuf, &ubuf, vxrs, 0, -1);
if (rc == 0)
for (i = 0; i < __NUM_VXRS_LOW; i++)
- *((__u64 *)(target->thread.fpu.vxrs + i) + 1) = vxrs[i];
+ target->thread.ufpu.vxrs[i].low = vxrs[i];
return rc;
}
@@ -1035,11 +681,11 @@ static int s390_vxrs_high_get(struct task_struct *target,
const struct user_regset *regset,
struct membuf to)
{
- if (!MACHINE_HAS_VX)
+ if (!cpu_has_vx())
return -ENODEV;
if (target == current)
- save_fpu_regs();
- return membuf_write(&to, target->thread.fpu.vxrs + __NUM_VXRS_LOW,
+ save_user_fpu_regs();
+ return membuf_write(&to, target->thread.ufpu.vxrs + __NUM_VXRS_LOW,
__NUM_VXRS_HIGH * sizeof(__vector128));
}
@@ -1050,13 +696,13 @@ static int s390_vxrs_high_set(struct task_struct *target,
{
int rc;
- if (!MACHINE_HAS_VX)
+ if (!cpu_has_vx())
return -ENODEV;
if (target == current)
- save_fpu_regs();
+ save_user_fpu_regs();
rc = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- target->thread.fpu.vxrs + __NUM_VXRS_LOW, 0, -1);
+ target->thread.ufpu.vxrs + __NUM_VXRS_LOW, 0, -1);
return rc;
}
@@ -1083,7 +729,7 @@ static int s390_gs_cb_get(struct task_struct *target,
{
struct gs_cb *data = target->thread.gs_cb;
- if (!MACHINE_HAS_GS)
+ if (!cpu_has_gs())
return -ENODEV;
if (!data)
return -ENODATA;
@@ -1100,7 +746,7 @@ static int s390_gs_cb_set(struct task_struct *target,
struct gs_cb gs_cb = { }, *data = NULL;
int rc;
- if (!MACHINE_HAS_GS)
+ if (!cpu_has_gs())
return -ENODEV;
if (!target->thread.gs_cb) {
data = kzalloc(sizeof(*data), GFP_KERNEL);
@@ -1124,7 +770,7 @@ static int s390_gs_cb_set(struct task_struct *target,
target->thread.gs_cb = data;
*target->thread.gs_cb = gs_cb;
if (target == current) {
- __ctl_set_bit(2, 4);
+ local_ctl_set_bit(2, CR2_GUARDED_STORAGE_BIT);
restore_gs_cb(target->thread.gs_cb);
}
preempt_enable();
@@ -1137,7 +783,7 @@ static int s390_gs_bc_get(struct task_struct *target,
{
struct gs_cb *data = target->thread.gs_bc_cb;
- if (!MACHINE_HAS_GS)
+ if (!cpu_has_gs())
return -ENODEV;
if (!data)
return -ENODATA;
@@ -1151,7 +797,7 @@ static int s390_gs_bc_set(struct task_struct *target,
{
struct gs_cb *data = target->thread.gs_bc_cb;
- if (!MACHINE_HAS_GS)
+ if (!cpu_has_gs())
return -ENODEV;
if (!data) {
data = kzalloc(sizeof(*data), GFP_KERNEL);
@@ -1256,7 +902,7 @@ static int s390_runtime_instr_set(struct task_struct *target,
static const struct user_regset s390_regsets[] = {
{
- .core_note_type = NT_PRSTATUS,
+ USER_REGSET_NOTE_TYPE(PRSTATUS),
.n = sizeof(s390_regs) / sizeof(long),
.size = sizeof(long),
.align = sizeof(long),
@@ -1264,7 +910,7 @@ static const struct user_regset s390_regsets[] = {
.set = s390_regs_set,
},
{
- .core_note_type = NT_PRFPREG,
+ USER_REGSET_NOTE_TYPE(PRFPREG),
.n = sizeof(s390_fp_regs) / sizeof(long),
.size = sizeof(long),
.align = sizeof(long),
@@ -1272,7 +918,7 @@ static const struct user_regset s390_regsets[] = {
.set = s390_fpregs_set,
},
{
- .core_note_type = NT_S390_SYSTEM_CALL,
+ USER_REGSET_NOTE_TYPE(S390_SYSTEM_CALL),
.n = 1,
.size = sizeof(unsigned int),
.align = sizeof(unsigned int),
@@ -1280,7 +926,7 @@ static const struct user_regset s390_regsets[] = {
.set = s390_system_call_set,
},
{
- .core_note_type = NT_S390_LAST_BREAK,
+ USER_REGSET_NOTE_TYPE(S390_LAST_BREAK),
.n = 1,
.size = sizeof(long),
.align = sizeof(long),
@@ -1288,7 +934,7 @@ static const struct user_regset s390_regsets[] = {
.set = s390_last_break_set,
},
{
- .core_note_type = NT_S390_TDB,
+ USER_REGSET_NOTE_TYPE(S390_TDB),
.n = 1,
.size = 256,
.align = 1,
@@ -1296,7 +942,7 @@ static const struct user_regset s390_regsets[] = {
.set = s390_tdb_set,
},
{
- .core_note_type = NT_S390_VXRS_LOW,
+ USER_REGSET_NOTE_TYPE(S390_VXRS_LOW),
.n = __NUM_VXRS_LOW,
.size = sizeof(__u64),
.align = sizeof(__u64),
@@ -1304,7 +950,7 @@ static const struct user_regset s390_regsets[] = {
.set = s390_vxrs_low_set,
},
{
- .core_note_type = NT_S390_VXRS_HIGH,
+ USER_REGSET_NOTE_TYPE(S390_VXRS_HIGH),
.n = __NUM_VXRS_HIGH,
.size = sizeof(__vector128),
.align = sizeof(__vector128),
@@ -1312,7 +958,7 @@ static const struct user_regset s390_regsets[] = {
.set = s390_vxrs_high_set,
},
{
- .core_note_type = NT_S390_GS_CB,
+ USER_REGSET_NOTE_TYPE(S390_GS_CB),
.n = sizeof(struct gs_cb) / sizeof(__u64),
.size = sizeof(__u64),
.align = sizeof(__u64),
@@ -1320,7 +966,7 @@ static const struct user_regset s390_regsets[] = {
.set = s390_gs_cb_set,
},
{
- .core_note_type = NT_S390_GS_BC,
+ USER_REGSET_NOTE_TYPE(S390_GS_BC),
.n = sizeof(struct gs_cb) / sizeof(__u64),
.size = sizeof(__u64),
.align = sizeof(__u64),
@@ -1328,7 +974,7 @@ static const struct user_regset s390_regsets[] = {
.set = s390_gs_bc_set,
},
{
- .core_note_type = NT_S390_RI_CB,
+ USER_REGSET_NOTE_TYPE(S390_RI_CB),
.n = sizeof(struct runtime_instr_cb) / sizeof(__u64),
.size = sizeof(__u64),
.align = sizeof(__u64),
@@ -1344,225 +990,8 @@ static const struct user_regset_view user_s390_view = {
.n = ARRAY_SIZE(s390_regsets)
};
-#ifdef CONFIG_COMPAT
-static int s390_compat_regs_get(struct task_struct *target,
- const struct user_regset *regset,
- struct membuf to)
-{
- unsigned n;
-
- if (target == current)
- save_access_regs(target->thread.acrs);
-
- for (n = 0; n < sizeof(s390_compat_regs); n += sizeof(compat_ulong_t))
- membuf_store(&to, __peek_user_compat(target, n));
- return 0;
-}
-
-static int s390_compat_regs_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- int rc = 0;
-
- if (target == current)
- save_access_regs(target->thread.acrs);
-
- if (kbuf) {
- const compat_ulong_t *k = kbuf;
- while (count > 0 && !rc) {
- rc = __poke_user_compat(target, pos, *k++);
- count -= sizeof(*k);
- pos += sizeof(*k);
- }
- } else {
- const compat_ulong_t __user *u = ubuf;
- while (count > 0 && !rc) {
- compat_ulong_t word;
- rc = __get_user(word, u++);
- if (rc)
- break;
- rc = __poke_user_compat(target, pos, word);
- count -= sizeof(*u);
- pos += sizeof(*u);
- }
- }
-
- if (rc == 0 && target == current)
- restore_access_regs(target->thread.acrs);
-
- return rc;
-}
-
-static int s390_compat_regs_high_get(struct task_struct *target,
- const struct user_regset *regset,
- struct membuf to)
-{
- compat_ulong_t *gprs_high;
- int i;
-
- gprs_high = (compat_ulong_t *)task_pt_regs(target)->gprs;
- for (i = 0; i < NUM_GPRS; i++, gprs_high += 2)
- membuf_store(&to, *gprs_high);
- return 0;
-}
-
-static int s390_compat_regs_high_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- compat_ulong_t *gprs_high;
- int rc = 0;
-
- gprs_high = (compat_ulong_t *)
- &task_pt_regs(target)->gprs[pos / sizeof(compat_ulong_t)];
- if (kbuf) {
- const compat_ulong_t *k = kbuf;
- while (count > 0) {
- *gprs_high = *k++;
- *gprs_high += 2;
- count -= sizeof(*k);
- }
- } else {
- const compat_ulong_t __user *u = ubuf;
- while (count > 0 && !rc) {
- unsigned long word;
- rc = __get_user(word, u++);
- if (rc)
- break;
- *gprs_high = word;
- *gprs_high += 2;
- count -= sizeof(*u);
- }
- }
-
- return rc;
-}
-
-static int s390_compat_last_break_get(struct task_struct *target,
- const struct user_regset *regset,
- struct membuf to)
-{
- compat_ulong_t last_break = target->thread.last_break;
-
- return membuf_store(&to, (unsigned long)last_break);
-}
-
-static int s390_compat_last_break_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- return 0;
-}
-
-static const struct user_regset s390_compat_regsets[] = {
- {
- .core_note_type = NT_PRSTATUS,
- .n = sizeof(s390_compat_regs) / sizeof(compat_long_t),
- .size = sizeof(compat_long_t),
- .align = sizeof(compat_long_t),
- .regset_get = s390_compat_regs_get,
- .set = s390_compat_regs_set,
- },
- {
- .core_note_type = NT_PRFPREG,
- .n = sizeof(s390_fp_regs) / sizeof(compat_long_t),
- .size = sizeof(compat_long_t),
- .align = sizeof(compat_long_t),
- .regset_get = s390_fpregs_get,
- .set = s390_fpregs_set,
- },
- {
- .core_note_type = NT_S390_SYSTEM_CALL,
- .n = 1,
- .size = sizeof(compat_uint_t),
- .align = sizeof(compat_uint_t),
- .regset_get = s390_system_call_get,
- .set = s390_system_call_set,
- },
- {
- .core_note_type = NT_S390_LAST_BREAK,
- .n = 1,
- .size = sizeof(long),
- .align = sizeof(long),
- .regset_get = s390_compat_last_break_get,
- .set = s390_compat_last_break_set,
- },
- {
- .core_note_type = NT_S390_TDB,
- .n = 1,
- .size = 256,
- .align = 1,
- .regset_get = s390_tdb_get,
- .set = s390_tdb_set,
- },
- {
- .core_note_type = NT_S390_VXRS_LOW,
- .n = __NUM_VXRS_LOW,
- .size = sizeof(__u64),
- .align = sizeof(__u64),
- .regset_get = s390_vxrs_low_get,
- .set = s390_vxrs_low_set,
- },
- {
- .core_note_type = NT_S390_VXRS_HIGH,
- .n = __NUM_VXRS_HIGH,
- .size = sizeof(__vector128),
- .align = sizeof(__vector128),
- .regset_get = s390_vxrs_high_get,
- .set = s390_vxrs_high_set,
- },
- {
- .core_note_type = NT_S390_HIGH_GPRS,
- .n = sizeof(s390_compat_regs_high) / sizeof(compat_long_t),
- .size = sizeof(compat_long_t),
- .align = sizeof(compat_long_t),
- .regset_get = s390_compat_regs_high_get,
- .set = s390_compat_regs_high_set,
- },
- {
- .core_note_type = NT_S390_GS_CB,
- .n = sizeof(struct gs_cb) / sizeof(__u64),
- .size = sizeof(__u64),
- .align = sizeof(__u64),
- .regset_get = s390_gs_cb_get,
- .set = s390_gs_cb_set,
- },
- {
- .core_note_type = NT_S390_GS_BC,
- .n = sizeof(struct gs_cb) / sizeof(__u64),
- .size = sizeof(__u64),
- .align = sizeof(__u64),
- .regset_get = s390_gs_bc_get,
- .set = s390_gs_bc_set,
- },
- {
- .core_note_type = NT_S390_RI_CB,
- .n = sizeof(struct runtime_instr_cb) / sizeof(__u64),
- .size = sizeof(__u64),
- .align = sizeof(__u64),
- .regset_get = s390_runtime_instr_get,
- .set = s390_runtime_instr_set,
- },
-};
-
-static const struct user_regset_view user_s390_compat_view = {
- .name = "s390",
- .e_machine = EM_S390,
- .regsets = s390_compat_regsets,
- .n = ARRAY_SIZE(s390_compat_regsets)
-};
-#endif
-
const struct user_regset_view *task_user_regset_view(struct task_struct *task)
{
-#ifdef CONFIG_COMPAT
- if (test_tsk_thread_flag(task, TIF_31BIT))
- return &user_s390_compat_view;
-#endif
return &user_s390_view;
}
@@ -1571,13 +1000,6 @@ static const char *gpr_names[NUM_GPRS] = {
"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
};
-unsigned long regs_get_register(struct pt_regs *regs, unsigned int offset)
-{
- if (offset >= NUM_GPRS)
- return 0;
- return regs->gprs[offset];
-}
-
int regs_query_register_offset(const char *name)
{
unsigned long offset;
@@ -1597,29 +1019,3 @@ const char *regs_query_register_name(unsigned int offset)
return NULL;
return gpr_names[offset];
}
-
-static int regs_within_kernel_stack(struct pt_regs *regs, unsigned long addr)
-{
- unsigned long ksp = kernel_stack_pointer(regs);
-
- return (addr & ~(THREAD_SIZE - 1)) == (ksp & ~(THREAD_SIZE - 1));
-}
-
-/**
- * regs_get_kernel_stack_nth() - get Nth entry of the stack
- * @regs:pt_regs which contains kernel stack pointer.
- * @n:stack entry number.
- *
- * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which
- * is specifined by @regs. If the @n th entry is NOT in the kernel stack,
- * this returns 0.
- */
-unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n)
-{
- unsigned long addr;
-
- addr = kernel_stack_pointer(regs) + n * sizeof(long);
- if (!regs_within_kernel_stack(regs, addr))
- return 0;
- return *(unsigned long *)addr;
-}
generated by cgit (git 2.34.1) at 2025-12-25 21:29:54 +0000