#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/smp.h>
-#include <linux/smp_lock.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <linux/user.h>
#include <linux/security.h>
#include <linux/audit.h>
#include <linux/signal.h>
-
+#include <linux/elf.h>
+#include <linux/regset.h>
+#include <linux/tracehook.h>
+#include <linux/seccomp.h>
+#include <trace/syscall.h>
+#include <asm/compat.h>
#include <asm/segment.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
+#include "entry.h"
#ifdef CONFIG_COMPAT
#include "compat_ptrace.h"
#endif
+#define CREATE_TRACE_POINTS
+#include <trace/events/syscalls.h>
+
+enum s390_regset {
+ REGSET_GENERAL,
+ REGSET_FP,
+ REGSET_GENERAL_EXTENDED,
+};
+
static void
FixPerRegisters(struct task_struct *task)
{
struct pt_regs *regs;
per_struct *per_info;
+ per_cr_words cr_words;
regs = task_pt_regs(task);
per_info = (per_struct *) &task->thread.per_info;
if (per_info->single_step) {
per_info->control_regs.bits.starting_addr = 0;
#ifdef CONFIG_COMPAT
- if (test_thread_flag(TIF_31BIT))
+ if (is_compat_task())
per_info->control_regs.bits.ending_addr = 0x7fffffffUL;
else
#endif
per_info->control_regs.bits.storage_alt_space_ctl = 1;
else
per_info->control_regs.bits.storage_alt_space_ctl = 0;
+
+ if (task == current) {
+ __ctl_store(cr_words, 9, 11);
+ if (memcmp(&cr_words, &per_info->control_regs.words,
+ sizeof(cr_words)) != 0)
+ __ctl_load(per_info->control_regs.words, 9, 11);
+ }
}
-void
-set_single_step(struct task_struct *task)
+void user_enable_single_step(struct task_struct *task)
{
task->thread.per_info.single_step = 1;
FixPerRegisters(task);
}
-void
-clear_single_step(struct task_struct *task)
+void user_disable_single_step(struct task_struct *task)
{
task->thread.per_info.single_step = 0;
FixPerRegisters(task);
ptrace_disable(struct task_struct *child)
{
/* make sure the single step bit is not set. */
- clear_single_step(child);
+ user_disable_single_step(child);
}
#ifndef CONFIG_64BIT
* struct user contain pad bytes that should be read as zeroes.
* Lovely...
*/
-static int
-peek_user(struct task_struct *child, addr_t addr, addr_t data)
+static unsigned long __peek_user(struct task_struct *child, addr_t addr)
{
struct user *dummy = NULL;
- addr_t offset, tmp, mask;
-
- /*
- * Stupid gdb peeks/pokes the access registers in 64 bit with
- * an alignment of 4. Programmers from hell...
- */
- mask = __ADDR_MASK;
-#ifdef CONFIG_64BIT
- if (addr >= (addr_t) &dummy->regs.acrs &&
- addr < (addr_t) &dummy->regs.orig_gpr2)
- mask = 3;
-#endif
- if ((addr & mask) || addr > sizeof(struct user) - __ADDR_MASK)
- return -EIO;
+ addr_t offset, tmp;
if (addr < (addr_t) &dummy->regs.acrs) {
/*
*/
tmp = (addr_t) task_pt_regs(child)->orig_gpr2;
+ } else if (addr < (addr_t) &dummy->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 + 1)) {
/*
* floating point regs. are stored in the thread structure
} else
tmp = 0;
- return put_user(tmp, (addr_t __user *) data);
+ return tmp;
}
-/*
- * Write a word to the user area of a process at location addr. This
- * operation does have an additional problem compared to peek_user.
- * Stores to the program status word and on the floating point
- * control register needs to get checked for validity.
- */
static int
-poke_user(struct task_struct *child, addr_t addr, addr_t data)
+peek_user(struct task_struct *child, addr_t addr, addr_t data)
{
- struct user *dummy = NULL;
- addr_t offset, mask;
+ addr_t tmp, mask;
/*
* Stupid gdb peeks/pokes the access registers in 64 bit with
- * an alignment of 4. Programmers from hell indeed...
+ * an alignment of 4. Programmers from hell...
*/
mask = __ADDR_MASK;
#ifdef CONFIG_64BIT
- if (addr >= (addr_t) &dummy->regs.acrs &&
- addr < (addr_t) &dummy->regs.orig_gpr2)
+ if (addr >= (addr_t) &((struct user *) NULL)->regs.acrs &&
+ addr < (addr_t) &((struct user *) NULL)->regs.orig_gpr2)
mask = 3;
#endif
if ((addr & mask) || addr > sizeof(struct user) - __ADDR_MASK)
return -EIO;
+ tmp = __peek_user(child, addr);
+ return put_user(tmp, (addr_t __user *) data);
+}
+
+/*
+ * Write a word to the user area of a process at location addr. This
+ * operation does have an additional problem compared to peek_user.
+ * Stores to the program status word and on the floating point
+ * control register needs to get checked for validity.
+ */
+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) {
/*
* psw and gprs are stored on the stack
*/
if (addr == (addr_t) &dummy->regs.psw.mask &&
#ifdef CONFIG_COMPAT
- data != PSW_MASK_MERGE(PSW_USER32_BITS, data) &&
+ data != PSW_MASK_MERGE(psw_user32_bits, data) &&
#endif
- data != PSW_MASK_MERGE(PSW_USER_BITS, data))
+ data != PSW_MASK_MERGE(psw_user_bits, data))
/* Invalid psw mask. */
return -EINVAL;
#ifndef CONFIG_64BIT
*/
task_pt_regs(child)->orig_gpr2 = data;
+ } else if (addr < (addr_t) &dummy->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 + 1)) {
/*
* floating point regs. are stored in the thread structure
}
static int
-do_ptrace_normal(struct task_struct *child, long request, long addr, long data)
+poke_user(struct task_struct *child, addr_t addr, addr_t data)
+{
+ addr_t mask;
+
+ /*
+ * Stupid gdb peeks/pokes the access registers in 64 bit with
+ * an alignment of 4. Programmers from hell indeed...
+ */
+ mask = __ADDR_MASK;
+#ifdef CONFIG_64BIT
+ if (addr >= (addr_t) &((struct user *) NULL)->regs.acrs &&
+ addr < (addr_t) &((struct user *) NULL)->regs.orig_gpr2)
+ mask = 3;
+#endif
+ if ((addr & mask) || addr > sizeof(struct user) - __ADDR_MASK)
+ return -EIO;
+
+ return __poke_user(child, addr, data);
+}
+
+long arch_ptrace(struct task_struct *child, long request, long addr, long data)
{
- unsigned long tmp;
ptrace_area parea;
int copied, ret;
switch (request) {
- case PTRACE_PEEKTEXT:
- case PTRACE_PEEKDATA:
- /* Remove high order bit from address (only for 31 bit). */
- addr &= PSW_ADDR_INSN;
- /* read word at location addr. */
- copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
- if (copied != sizeof(tmp))
- return -EIO;
- return put_user(tmp, (unsigned long __user *) data);
-
case PTRACE_PEEKUSR:
/* read the word at location addr in the USER area. */
return peek_user(child, addr, data);
- case PTRACE_POKETEXT:
- case PTRACE_POKEDATA:
- /* Remove high order bit from address (only for 31 bit). */
- addr &= PSW_ADDR_INSN;
- /* write the word at location addr. */
- copied = access_process_vm(child, addr, &data, sizeof(data),1);
- if (copied != sizeof(data))
- return -EIO;
- return 0;
-
case PTRACE_POKEUSR:
/* write the word at location addr in the USER area */
return poke_user(child, addr, data);
case PTRACE_PEEKUSR_AREA:
case PTRACE_POKEUSR_AREA:
- if (copy_from_user(&parea, (void __user *) addr,
+ if (copy_from_user(&parea, (void __force __user *) addr,
sizeof(parea)))
return -EFAULT;
addr = parea.kernel_addr;
if (request == PTRACE_PEEKUSR_AREA)
ret = peek_user(child, addr, data);
else {
- addr_t tmp;
- if (get_user (tmp, (addr_t __user *) data))
+ addr_t utmp;
+ if (get_user(utmp,
+ (addr_t __force __user *) data))
return -EFAULT;
- ret = poke_user(child, addr, tmp);
+ ret = poke_user(child, addr, utmp);
}
if (ret)
return ret;
copied += sizeof(unsigned long);
}
return 0;
+ default:
+ /* Removing high order bit from addr (only for 31 bit). */
+ addr &= PSW_ADDR_INSN;
+ return ptrace_request(child, request, addr, data);
}
- return ptrace_request(child, request, addr, data);
}
#ifdef CONFIG_COMPAT
/*
* Same as peek_user but for a 31 bit program.
*/
-static int
-peek_user_emu31(struct task_struct *child, addr_t addr, addr_t data)
+static u32 __peek_user_compat(struct task_struct *child, addr_t addr)
{
struct user32 *dummy32 = NULL;
per_struct32 *dummy_per32 = NULL;
addr_t offset;
__u32 tmp;
- if (!test_thread_flag(TIF_31BIT) ||
- (addr & 3) || addr > sizeof(struct user) - 3)
- return -EIO;
-
if (addr < (addr_t) &dummy32->regs.acrs) {
/*
* psw and gprs are stored on the stack
if (addr == (addr_t) &dummy32->regs.psw.mask) {
/* Fake a 31 bit psw mask. */
tmp = (__u32)(task_pt_regs(child)->psw.mask >> 32);
- tmp = PSW32_MASK_MERGE(PSW32_USER_BITS, tmp);
+ tmp = PSW32_MASK_MERGE(psw32_user_bits, tmp);
} else if (addr == (addr_t) &dummy32->regs.psw.addr) {
/* Fake a 31 bit psw address. */
tmp = (__u32) task_pt_regs(child)->psw.addr |
*/
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 + 1)) {
/*
* floating point regs. are stored in the thread structure
} 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 but for a 31 bit program.
*/
-static int
-poke_user_emu31(struct task_struct *child, addr_t addr, addr_t data)
+static int __poke_user_compat(struct task_struct *child,
+ addr_t addr, addr_t data)
{
struct user32 *dummy32 = NULL;
per_struct32 *dummy_per32 = NULL;
+ __u32 tmp = (__u32) data;
addr_t offset;
- __u32 tmp;
-
- if (!test_thread_flag(TIF_31BIT) ||
- (addr & 3) || addr > sizeof(struct user32) - 3)
- return -EIO;
-
- tmp = (__u32) data;
if (addr < (addr_t) &dummy32->regs.acrs) {
/*
*/
if (addr == (addr_t) &dummy32->regs.psw.mask) {
/* Build a 64 bit psw mask from 31 bit mask. */
- if (tmp != PSW32_MASK_MERGE(PSW32_USER_BITS, tmp))
+ if (tmp != PSW32_MASK_MERGE(psw32_user_bits, tmp))
/* Invalid psw mask. */
return -EINVAL;
task_pt_regs(child)->psw.mask =
- PSW_MASK_MERGE(PSW_USER32_BITS, (__u64) tmp << 32);
+ PSW_MASK_MERGE(psw_user32_bits, (__u64) tmp << 32);
} else if (addr == (addr_t) &dummy32->regs.psw.addr) {
/* Build a 64 bit psw address from 31 bit address. */
task_pt_regs(child)->psw.addr =
*/
*(__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 + 1)) {
/*
* floating point regs. are stored in the thread structure
return 0;
}
-static int
-do_ptrace_emu31(struct task_struct *child, long request, long addr, long data)
+static int poke_user_compat(struct task_struct *child,
+ addr_t addr, addr_t data)
{
- unsigned int tmp; /* 4 bytes !! */
+ if (!is_compat_task() || (addr & 3) || addr > sizeof(struct user32) - 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;
ptrace_area_emu31 parea;
int copied, ret;
switch (request) {
- case PTRACE_PEEKTEXT:
- case PTRACE_PEEKDATA:
- /* read word at location addr. */
- copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
- if (copied != sizeof(tmp))
- return -EIO;
- return put_user(tmp, (unsigned int __user *) data);
-
case PTRACE_PEEKUSR:
/* read the word at location addr in the USER area. */
- return peek_user_emu31(child, addr, data);
-
- case PTRACE_POKETEXT:
- case PTRACE_POKEDATA:
- /* write the word at location addr. */
- tmp = data;
- copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 1);
- if (copied != sizeof(tmp))
- return -EIO;
- return 0;
+ return peek_user_compat(child, addr, data);
case PTRACE_POKEUSR:
/* write the word at location addr in the USER area */
- return poke_user_emu31(child, addr, data);
+ return poke_user_compat(child, addr, data);
case PTRACE_PEEKUSR_AREA:
case PTRACE_POKEUSR_AREA:
- if (copy_from_user(&parea, (void __user *) addr,
+ if (copy_from_user(&parea, (void __force __user *) addr,
sizeof(parea)))
return -EFAULT;
addr = parea.kernel_addr;
copied = 0;
while (copied < parea.len) {
if (request == PTRACE_PEEKUSR_AREA)
- ret = peek_user_emu31(child, addr, data);
+ ret = peek_user_compat(child, addr, data);
else {
- __u32 tmp;
- if (get_user (tmp, (__u32 __user *) data))
+ __u32 utmp;
+ if (get_user(utmp,
+ (__u32 __force __user *) data))
return -EFAULT;
- ret = poke_user_emu31(child, addr, tmp);
+ ret = poke_user_compat(child, addr, utmp);
}
if (ret)
return ret;
copied += sizeof(unsigned int);
}
return 0;
- case PTRACE_GETEVENTMSG:
- return put_user((__u32) child->ptrace_message,
- (unsigned int __user *) data);
- case PTRACE_GETSIGINFO:
- if (child->last_siginfo == NULL)
- return -EINVAL;
- return copy_siginfo_to_user32((compat_siginfo_t __user *) data,
- child->last_siginfo);
- case PTRACE_SETSIGINFO:
- if (child->last_siginfo == NULL)
- return -EINVAL;
- return copy_siginfo_from_user32(child->last_siginfo,
- (compat_siginfo_t __user *) data);
}
- return ptrace_request(child, request, addr, data);
+ return compat_ptrace_request(child, request, addr, data);
}
#endif
-#define PT32_IEEE_IP 0x13c
-
-static int
-do_ptrace(struct task_struct *child, long request, long addr, long data)
+asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
{
- int ret;
+ long ret = 0;
- if (request == PTRACE_ATTACH)
- return ptrace_attach(child);
+ /* Do the secure computing check first. */
+ secure_computing(regs->gprs[2]);
/*
- * Special cases to get/store the ieee instructions pointer.
+ * The sysc_tracesys code in entry.S stored the system
+ * call number to gprs[2].
*/
- if (child == current) {
- if (request == PTRACE_PEEKUSR && addr == PT_IEEE_IP)
- return peek_user(child, addr, data);
- if (request == PTRACE_POKEUSR && addr == PT_IEEE_IP)
- return poke_user(child, addr, data);
-#ifdef CONFIG_COMPAT
- if (request == PTRACE_PEEKUSR &&
- addr == PT32_IEEE_IP && test_thread_flag(TIF_31BIT))
- return peek_user_emu31(child, addr, data);
- if (request == PTRACE_POKEUSR &&
- addr == PT32_IEEE_IP && test_thread_flag(TIF_31BIT))
- return poke_user_emu31(child, addr, data);
-#endif
+ if (test_thread_flag(TIF_SYSCALL_TRACE) &&
+ (tracehook_report_syscall_entry(regs) ||
+ regs->gprs[2] >= NR_syscalls)) {
+ /*
+ * Tracing decided this syscall should not happen or the
+ * debugger stored an invalid system call number. Skip
+ * the system call and the system call restart handling.
+ */
+ regs->svcnr = 0;
+ ret = -1;
}
- ret = ptrace_check_attach(child, request == PTRACE_KILL);
- if (ret < 0)
- return ret;
+ if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
+ trace_sys_enter(regs, regs->gprs[2]);
- switch (request) {
- case PTRACE_SYSCALL:
- /* continue and stop at next (return from) syscall */
- case PTRACE_CONT:
- /* restart after signal. */
- if (!valid_signal(data))
- return -EIO;
- if (request == PTRACE_SYSCALL)
- set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- else
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- child->exit_code = data;
- /* make sure the single step bit is not set. */
- clear_single_step(child);
- wake_up_process(child);
- return 0;
+ if (unlikely(current->audit_context))
+ audit_syscall_entry(is_compat_task() ?
+ AUDIT_ARCH_S390 : AUDIT_ARCH_S390X,
+ regs->gprs[2], regs->orig_gpr2,
+ regs->gprs[3], regs->gprs[4],
+ regs->gprs[5]);
+ return ret ?: regs->gprs[2];
+}
- case PTRACE_KILL:
- /*
- * make the child exit. Best I can do is send it a sigkill.
- * perhaps it should be put in the status that it wants to
- * exit.
- */
- if (child->exit_state == EXIT_ZOMBIE) /* already dead */
- return 0;
- child->exit_code = SIGKILL;
- /* make sure the single step bit is not set. */
- clear_single_step(child);
- wake_up_process(child);
- return 0;
+asmlinkage void do_syscall_trace_exit(struct pt_regs *regs)
+{
+ if (unlikely(current->audit_context))
+ audit_syscall_exit(AUDITSC_RESULT(regs->gprs[2]),
+ regs->gprs[2]);
- case PTRACE_SINGLESTEP:
- /* set the trap flag. */
- if (!valid_signal(data))
- return -EIO;
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- child->exit_code = data;
- if (data)
- set_tsk_thread_flag(child, TIF_SINGLE_STEP);
- else
- set_single_step(child);
- /* give it a chance to run. */
- wake_up_process(child);
- return 0;
+ if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
+ trace_sys_exit(regs, regs->gprs[2]);
- case PTRACE_DETACH:
- /* detach a process that was attached. */
- return ptrace_detach(child, data);
+ if (test_thread_flag(TIF_SYSCALL_TRACE))
+ tracehook_report_syscall_exit(regs, 0);
+}
+/*
+ * user_regset definitions.
+ */
- /* Do requests that differ for 31/64 bit */
- default:
-#ifdef CONFIG_COMPAT
- if (test_thread_flag(TIF_31BIT))
- return do_ptrace_emu31(child, request, addr, data);
-#endif
- return do_ptrace_normal(child, request, addr, data);
+static int s390_regs_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ if (target == current)
+ save_access_regs(target->thread.acrs);
+
+ if (kbuf) {
+ unsigned long *k = kbuf;
+ while (count > 0) {
+ *k++ = __peek_user(target, pos);
+ count -= sizeof(*k);
+ pos += sizeof(*k);
+ }
+ } else {
+ unsigned long __user *u = ubuf;
+ while (count > 0) {
+ if (__put_user(__peek_user(target, pos), u++))
+ return -EFAULT;
+ count -= sizeof(*u);
+ pos += sizeof(*u);
+ }
}
- /* Not reached. */
- return -EIO;
+ return 0;
}
-asmlinkage long
-sys_ptrace(long request, long pid, long addr, long data)
+static int s390_regs_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
{
- struct task_struct *child;
- int ret;
+ int rc = 0;
- lock_kernel();
- if (request == PTRACE_TRACEME) {
- ret = ptrace_traceme();
- goto out;
+ if (target == current)
+ save_access_regs(target->thread.acrs);
+
+ if (kbuf) {
+ const unsigned long *k = kbuf;
+ while (count > 0 && !rc) {
+ rc = __poke_user(target, pos, *k++);
+ count -= sizeof(*k);
+ pos += sizeof(*k);
+ }
+ } else {
+ const unsigned long __user *u = ubuf;
+ while (count > 0 && !rc) {
+ unsigned long word;
+ rc = __get_user(word, u++);
+ if (rc)
+ break;
+ rc = __poke_user(target, pos, word);
+ count -= sizeof(*u);
+ pos += sizeof(*u);
+ }
}
- child = ptrace_get_task_struct(pid);
- if (IS_ERR(child)) {
- ret = PTR_ERR(child);
- goto out;
+ if (rc == 0 && target == current)
+ restore_access_regs(target->thread.acrs);
+
+ return rc;
+}
+
+static int s390_fpregs_get(struct task_struct *target,
+ const struct user_regset *regset, unsigned int pos,
+ unsigned int count, void *kbuf, void __user *ubuf)
+{
+ if (target == current)
+ save_fp_regs(&target->thread.fp_regs);
+
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.fp_regs, 0, -1);
+}
+
+static int s390_fpregs_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_fp_regs(&target->thread.fp_regs);
+
+ /* If setting FPC, must validate it first. */
+ if (count > 0 && pos < offsetof(s390_fp_regs, fprs)) {
+ u32 fpc[2] = { target->thread.fp_regs.fpc, 0 };
+ rc = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &fpc,
+ 0, offsetof(s390_fp_regs, fprs));
+ if (rc)
+ return rc;
+ if ((fpc[0] & ~FPC_VALID_MASK) != 0 || fpc[1] != 0)
+ return -EINVAL;
+ target->thread.fp_regs.fpc = fpc[0];
}
- ret = do_ptrace(child, request, addr, data);
- put_task_struct(child);
-out:
- unlock_kernel();
- return ret;
+ if (rc == 0 && count > 0)
+ rc = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ target->thread.fp_regs.fprs,
+ offsetof(s390_fp_regs, fprs), -1);
+
+ if (rc == 0 && target == current)
+ restore_fp_regs(&target->thread.fp_regs);
+
+ return rc;
}
-asmlinkage void
-syscall_trace(struct pt_regs *regs, int entryexit)
+static const struct user_regset s390_regsets[] = {
+ [REGSET_GENERAL] = {
+ .core_note_type = NT_PRSTATUS,
+ .n = sizeof(s390_regs) / sizeof(long),
+ .size = sizeof(long),
+ .align = sizeof(long),
+ .get = s390_regs_get,
+ .set = s390_regs_set,
+ },
+ [REGSET_FP] = {
+ .core_note_type = NT_PRFPREG,
+ .n = sizeof(s390_fp_regs) / sizeof(long),
+ .size = sizeof(long),
+ .align = sizeof(long),
+ .get = s390_fpregs_get,
+ .set = s390_fpregs_set,
+ },
+};
+
+static const struct user_regset_view user_s390_view = {
+ .name = UTS_MACHINE,
+ .e_machine = EM_S390,
+ .regsets = s390_regsets,
+ .n = ARRAY_SIZE(s390_regsets)
+};
+
+#ifdef CONFIG_COMPAT
+static int s390_compat_regs_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
{
- if (unlikely(current->audit_context) && entryexit)
- audit_syscall_exit(AUDITSC_RESULT(regs->gprs[2]), regs->gprs[2]);
+ if (target == current)
+ save_access_regs(target->thread.acrs);
+
+ if (kbuf) {
+ compat_ulong_t *k = kbuf;
+ while (count > 0) {
+ *k++ = __peek_user_compat(target, pos);
+ count -= sizeof(*k);
+ pos += sizeof(*k);
+ }
+ } else {
+ compat_ulong_t __user *u = ubuf;
+ while (count > 0) {
+ if (__put_user(__peek_user_compat(target, pos), u++))
+ return -EFAULT;
+ count -= sizeof(*u);
+ pos += sizeof(*u);
+ }
+ }
+ return 0;
+}
- if (!test_thread_flag(TIF_SYSCALL_TRACE))
- goto out;
- if (!(current->ptrace & PT_PTRACED))
- goto out;
- ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
- ? 0x80 : 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 the debuffer has set an invalid system call number,
- * we prepare to skip the system call restart handling.
- */
- if (!entryexit && regs->gprs[2] >= NR_syscalls)
- regs->trap = -1;
+ if (target == current)
+ save_access_regs(target->thread.acrs);
- /*
- * this isn't the same as continuing with a signal, but it will do
- * for normal use. strace only continues with a signal if the
- * stopping signal is not SIGTRAP. -brl
- */
- if (current->exit_code) {
- send_sig(current->exit_code, current, 1);
- current->exit_code = 0;
+ 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);
+ }
}
- out:
- if (unlikely(current->audit_context) && !entryexit)
- audit_syscall_entry(test_thread_flag(TIF_31BIT)?AUDIT_ARCH_S390:AUDIT_ARCH_S390X,
- regs->gprs[2], regs->orig_gpr2, regs->gprs[3],
- regs->gprs[4], regs->gprs[5]);
+
+ 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,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ compat_ulong_t *gprs_high;
+
+ gprs_high = (compat_ulong_t *)
+ &task_pt_regs(target)->gprs[pos / sizeof(compat_ulong_t)];
+ if (kbuf) {
+ compat_ulong_t *k = kbuf;
+ while (count > 0) {
+ *k++ = *gprs_high;
+ gprs_high += 2;
+ count -= sizeof(*k);
+ }
+ } else {
+ compat_ulong_t __user *u = ubuf;
+ while (count > 0) {
+ if (__put_user(*gprs_high, u++))
+ return -EFAULT;
+ gprs_high += 2;
+ count -= sizeof(*u);
+ }
+ }
+ 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 const struct user_regset s390_compat_regsets[] = {
+ [REGSET_GENERAL] = {
+ .core_note_type = NT_PRSTATUS,
+ .n = sizeof(s390_compat_regs) / sizeof(compat_long_t),
+ .size = sizeof(compat_long_t),
+ .align = sizeof(compat_long_t),
+ .get = s390_compat_regs_get,
+ .set = s390_compat_regs_set,
+ },
+ [REGSET_FP] = {
+ .core_note_type = NT_PRFPREG,
+ .n = sizeof(s390_fp_regs) / sizeof(compat_long_t),
+ .size = sizeof(compat_long_t),
+ .align = sizeof(compat_long_t),
+ .get = s390_fpregs_get,
+ .set = s390_fpregs_set,
+ },
+ [REGSET_GENERAL_EXTENDED] = {
+ .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),
+ .get = s390_compat_regs_high_get,
+ .set = s390_compat_regs_high_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;
+}
+
+static const char *gpr_names[NUM_GPRS] = {
+ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
+ "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;
+
+ if (!name || *name != 'r')
+ return -EINVAL;
+ if (strict_strtoul(name + 1, 10, &offset))
+ return -EINVAL;
+ if (offset >= NUM_GPRS)
+ return -EINVAL;
+ return offset;
+}
+
+const char *regs_query_register_name(unsigned int offset)
+{
+ if (offset >= NUM_GPRS)
+ 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;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff