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Diffstat (limited to 'ANDROID_3.4.5/arch/s390/kernel/ptrace.c')
-rw-r--r--ANDROID_3.4.5/arch/s390/kernel/ptrace.c1237
1 files changed, 0 insertions, 1237 deletions
diff --git a/ANDROID_3.4.5/arch/s390/kernel/ptrace.c b/ANDROID_3.4.5/arch/s390/kernel/ptrace.c
deleted file mode 100644
index 02f300fb..00000000
--- a/ANDROID_3.4.5/arch/s390/kernel/ptrace.c
+++ /dev/null
@@ -1,1237 +0,0 @@
-/*
- * Ptrace user space interface.
- *
- * Copyright IBM Corp. 1999,2010
- * Author(s): Denis Joseph Barrow
- * Martin Schwidefsky (schwidefsky@de.ibm.com)
- */
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/smp.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 <linux/compat.h>
-#include <trace/syscall.h>
-#include <asm/segment.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/pgalloc.h>
-#include <asm/uaccess.h>
-#include <asm/unistd.h>
-#include <asm/switch_to.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_LAST_BREAK,
- REGSET_SYSTEM_CALL,
- REGSET_GENERAL_EXTENDED,
-};
-
-void update_per_regs(struct task_struct *task)
-{
- struct pt_regs *regs = task_pt_regs(task);
- struct thread_struct *thread = &task->thread;
- struct per_regs old, new;
-
- /* Copy user specified PER registers */
- new.control = thread->per_user.control;
- new.start = thread->per_user.start;
- new.end = thread->per_user.end;
-
- /* merge TIF_SINGLE_STEP into user specified PER registers. */
- if (test_tsk_thread_flag(task, TIF_SINGLE_STEP)) {
- new.control |= PER_EVENT_IFETCH;
- new.start = 0;
- new.end = PSW_ADDR_INSN;
- }
-
- /* Take care of the PER enablement bit in the PSW. */
- if (!(new.control & PER_EVENT_MASK)) {
- regs->psw.mask &= ~PSW_MASK_PER;
- return;
- }
- regs->psw.mask |= PSW_MASK_PER;
- __ctl_store(old, 9, 11);
- if (memcmp(&new, &old, sizeof(struct per_regs)) != 0)
- __ctl_load(new, 9, 11);
-}
-
-void user_enable_single_step(struct task_struct *task)
-{
- set_tsk_thread_flag(task, TIF_SINGLE_STEP);
- if (task == current)
- update_per_regs(task);
-}
-
-void user_disable_single_step(struct task_struct *task)
-{
- clear_tsk_thread_flag(task, TIF_SINGLE_STEP);
- if (task == current)
- update_per_regs(task);
-}
-
-/*
- * Called by kernel/ptrace.c when detaching..
- *
- * Clear all debugging related fields.
- */
-void ptrace_disable(struct task_struct *task)
-{
- memset(&task->thread.per_user, 0, sizeof(task->thread.per_user));
- memset(&task->thread.per_event, 0, sizeof(task->thread.per_event));
- clear_tsk_thread_flag(task, TIF_SINGLE_STEP);
- clear_tsk_thread_flag(task, TIF_PER_TRAP);
-}
-
-#ifndef CONFIG_64BIT
-# define __ADDR_MASK 3
-#else
-# define __ADDR_MASK 7
-#endif
-
-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)
- /* 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)
- /* 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)
- /* End address of the active per set. */
- return test_thread_flag(TIF_SINGLE_STEP) ?
- PSW_ADDR_INSN : child->thread.per_user.end;
- else if (addr == (addr_t) &dummy->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)
- /* Start address of the user specified per set. */
- return child->thread.per_user.start;
- else if (addr == (addr_t) &dummy->ending_addr)
- /* End address of the user specified per set. */
- return child->thread.per_user.end;
- else if (addr == (addr_t) &dummy->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)
- /* Address of the last PER trap */
- return child->thread.per_event.address;
- else if (addr == (addr_t) &dummy->access_id)
- /* Access id of the last PER trap */
- return (unsigned long)
- child->thread.per_event.paid << (BITS_PER_LONG - 8);
- return 0;
-}
-
-/*
- * Read the word at offset addr from the user area of a process. The
- * trouble here is that the information is littered over different
- * locations. The process registers are found on the kernel stack,
- * the floating point stuff and the trace settings are stored in
- * the task structure. In addition the different structures in
- * struct user contain pad bytes that should be read as zeroes.
- * Lovely...
- */
-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) {
- /*
- * 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)
- /* Return a clean psw mask. */
- tmp = psw_user_bits | (tmp & PSW_MASK_USER);
-
- } else if (addr < (addr_t) &dummy->regs.orig_gpr2) {
- /*
- * access registers are stored in the thread structure
- */
- offset = addr - (addr_t) &dummy->regs.acrs;
-#ifdef CONFIG_64BIT
- /*
- * 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])
- tmp = ((unsigned long) child->thread.acrs[15]) << 32;
- else
-#endif
- tmp = *(addr_t *)((addr_t) &child->thread.acrs + offset);
-
- } else if (addr == (addr_t) &dummy->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) {
- /*
- * 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
- */
- offset = addr - (addr_t) &dummy->regs.fp_regs;
- tmp = *(addr_t *)((addr_t) &child->thread.fp_regs + offset);
- if (addr == (addr_t) &dummy->regs.fp_regs.fpc)
- tmp &= (unsigned long) FPC_VALID_MASK
- << (BITS_PER_LONG - 32);
-
- } else if (addr < (addr_t) (&dummy->regs.per_info + 1)) {
- /*
- * Handle access to the per_info structure.
- */
- addr -= (addr_t) &dummy->regs.per_info;
- tmp = __peek_user_per(child, addr);
-
- } else
- tmp = 0;
-
- return tmp;
-}
-
-static int
-peek_user(struct task_struct *child, addr_t addr, addr_t data)
-{
- addr_t 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) &((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);
-}
-
-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.
- * 1) cr9: the debugger wants to set a new PER event mask
- * 2) starting_addr: the debugger wants to set a new starting
- * address to use with the PER event mask.
- * 3) ending_addr: the debugger wants to set a new ending
- * address to use with the PER event mask.
- * The user specified PER event mask and the start and end
- * 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)
- /* 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)
- /* Starting address of the user specified per set. */
- child->thread.per_user.start = data;
- else if (addr == (addr_t) &dummy->ending_addr)
- /* Ending address of the user specified per set. */
- child->thread.per_user.end = 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 &&
- ((data & ~PSW_MASK_USER) != psw_user_bits ||
- ((data & PSW_MASK_EA) && !(data & PSW_MASK_BA))))
- /* Invalid psw mask. */
- return -EINVAL;
- *(addr_t *)((addr_t) &task_pt_regs(child)->psw + addr) = data;
-
- } else if (addr < (addr_t) (&dummy->regs.orig_gpr2)) {
- /*
- * access registers are stored in the thread structure
- */
- offset = addr - (addr_t) &dummy->regs.acrs;
-#ifdef CONFIG_64BIT
- /*
- * 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])
- child->thread.acrs[15] = (unsigned int) (data >> 32);
- else
-#endif
- *(addr_t *)((addr_t) &child->thread.acrs + offset) = data;
-
- } else if (addr == (addr_t) &dummy->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) {
- /*
- * 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
- */
- if (addr == (addr_t) &dummy->regs.fp_regs.fpc &&
- (data & ~((unsigned long) FPC_VALID_MASK
- << (BITS_PER_LONG - 32))) != 0)
- return -EINVAL;
- offset = addr - (addr_t) &dummy->regs.fp_regs;
- *(addr_t *)((addr_t) &child->thread.fp_regs + offset) = data;
-
- } else if (addr < (addr_t) (&dummy->regs.per_info + 1)) {
- /*
- * Handle access to the per_info structure.
- */
- addr -= (addr_t) &dummy->regs.per_info;
- __poke_user_per(child, addr, data);
-
- }
-
- return 0;
-}
-
-static int 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,
- unsigned long addr, unsigned long data)
-{
- ptrace_area parea;
- int copied, ret;
-
- switch (request) {
- case PTRACE_PEEKUSR:
- /* read the word at location addr in the USER area. */
- return peek_user(child, addr, data);
-
- 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 __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(child, addr, data);
- else {
- addr_t utmp;
- if (get_user(utmp,
- (addr_t __force __user *) data))
- return -EFAULT;
- ret = poke_user(child, addr, utmp);
- }
- if (ret)
- return ret;
- addr += sizeof(unsigned long);
- data += sizeof(unsigned long);
- copied += sizeof(unsigned long);
- }
- return 0;
- case PTRACE_GET_LAST_BREAK:
- put_user(task_thread_info(child)->last_break,
- (unsigned long __user *) data);
- return 0;
- default:
- /* Removing high order bit from addr (only for 31 bit). */
- addr &= PSW_ADDR_INSN;
- return ptrace_request(child, request, addr, data);
- }
-}
-
-#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_user_bits | (tmp & PSW32_MASK_USER);
- } 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 + 1)) {
- /*
- * floating point regs. are stored in the thread structure
- */
- offset = addr - (addr_t) &dummy32->regs.fp_regs;
- tmp = *(__u32 *)((addr_t) &child->thread.fp_regs + 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) {
- /* Build a 64 bit psw mask from 31 bit mask. */
- if ((tmp & ~PSW32_MASK_USER) != psw32_user_bits)
- /* Invalid psw mask. */
- return -EINVAL;
- regs->psw.mask = (regs->psw.mask & ~PSW_MASK_USER) |
- (regs->psw.mask & PSW_MASK_BA) |
- (__u64)(tmp & PSW32_MASK_USER) << 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 {
- /* 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 + 1)) {
- /*
- * floating point regs. are stored in the thread structure
- */
- if (addr == (addr_t) &dummy32->regs.fp_regs.fpc &&
- (tmp & ~FPC_VALID_MASK) != 0)
- /* Invalid floating point control. */
- return -EINVAL;
- offset = addr - (addr_t) &dummy32->regs.fp_regs;
- *(__u32 *)((addr_t) &child->thread.fp_regs + 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(task_thread_info(child)->last_break,
- (unsigned int __user *) data);
- return 0;
- }
- return compat_ptrace_request(child, request, addr, data);
-}
-#endif
-
-asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
-{
- long ret = 0;
-
- /* Do the secure computing check first. */
- secure_computing(regs->gprs[2]);
-
- /*
- * The sysc_tracesys code in entry.S stored the system
- * call number to gprs[2].
- */
- 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.
- */
- clear_thread_flag(TIF_SYSCALL);
- ret = -1;
- }
-
- if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
- trace_sys_enter(regs, regs->gprs[2]);
-
- 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];
-}
-
-asmlinkage void do_syscall_trace_exit(struct pt_regs *regs)
-{
- audit_syscall_exit(regs);
-
- if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
- trace_sys_exit(regs, regs->gprs[2]);
-
- if (test_thread_flag(TIF_SYSCALL_TRACE))
- tracehook_report_syscall_exit(regs, 0);
-}
-
-/*
- * user_regset definitions.
- */
-
-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);
- }
- }
- return 0;
-}
-
-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)
-{
- int rc = 0;
-
- 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);
- }
- }
-
- 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];
- }
-
- 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;
-}
-
-#ifdef CONFIG_64BIT
-
-static int s390_last_break_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- if (count > 0) {
- if (kbuf) {
- unsigned long *k = kbuf;
- *k = task_thread_info(target)->last_break;
- } else {
- unsigned long __user *u = ubuf;
- if (__put_user(task_thread_info(target)->last_break, u))
- return -EFAULT;
- }
- }
- return 0;
-}
-
-static int s390_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;
-}
-
-#endif
-
-static int s390_system_call_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- unsigned int *data = &task_thread_info(target)->system_call;
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- data, 0, sizeof(unsigned int));
-}
-
-static int s390_system_call_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- unsigned int *data = &task_thread_info(target)->system_call;
- return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- data, 0, sizeof(unsigned int));
-}
-
-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,
- },
-#ifdef CONFIG_64BIT
- [REGSET_LAST_BREAK] = {
- .core_note_type = NT_S390_LAST_BREAK,
- .n = 1,
- .size = sizeof(long),
- .align = sizeof(long),
- .get = s390_last_break_get,
- .set = s390_last_break_set,
- },
-#endif
- [REGSET_SYSTEM_CALL] = {
- .core_note_type = NT_S390_SYSTEM_CALL,
- .n = 1,
- .size = sizeof(unsigned int),
- .align = sizeof(unsigned int),
- .get = s390_system_call_get,
- .set = s390_system_call_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 (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;
-}
-
-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,
- 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 int s390_compat_last_break_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- compat_ulong_t last_break;
-
- if (count > 0) {
- last_break = task_thread_info(target)->last_break;
- if (kbuf) {
- unsigned long *k = kbuf;
- *k = last_break;
- } else {
- unsigned long __user *u = ubuf;
- if (__put_user(last_break, u))
- return -EFAULT;
- }
- }
- return 0;
-}
-
-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[] = {
- [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_LAST_BREAK] = {
- .core_note_type = NT_S390_LAST_BREAK,
- .n = 1,
- .size = sizeof(long),
- .align = sizeof(long),
- .get = s390_compat_last_break_get,
- .set = s390_compat_last_break_set,
- },
- [REGSET_SYSTEM_CALL] = {
- .core_note_type = NT_S390_SYSTEM_CALL,
- .n = 1,
- .size = sizeof(compat_uint_t),
- .align = sizeof(compat_uint_t),
- .get = s390_system_call_get,
- .set = s390_system_call_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;
-}
generated by cgit (git 2.34.1) at 2025-02-12 02:24:53 +0000