diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/microblaze/kernel/ptrace.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/microblaze/kernel/ptrace.c | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/ANDROID_3.4.5/arch/microblaze/kernel/ptrace.c b/ANDROID_3.4.5/arch/microblaze/kernel/ptrace.c deleted file mode 100644 index 6eb2aa92..00000000 --- a/ANDROID_3.4.5/arch/microblaze/kernel/ptrace.c +++ /dev/null @@ -1,193 +0,0 @@ -/* - * `ptrace' system call - * - * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> - * Copyright (C) 2007-2009 PetaLogix - * Copyright (C) 2004-2007 John Williams <john.williams@petalogix.com> - * - * derived from arch/v850/kernel/ptrace.c - * - * Copyright (C) 2002,03 NEC Electronics Corporation - * Copyright (C) 2002,03 Miles Bader <miles@gnu.org> - * - * Derived from arch/mips/kernel/ptrace.c: - * - * Copyright (C) 1992 Ross Biro - * Copyright (C) Linus Torvalds - * Copyright (C) 1994, 95, 96, 97, 98, 2000 Ralf Baechle - * Copyright (C) 1996 David S. Miller - * Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com - * Copyright (C) 1999 MIPS Technologies, Inc. - * - * This file is subject to the terms and conditions of the GNU General - * Public License. See the file COPYING in the main directory of this - * archive for more details. - */ - -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/sched.h> -#include <linux/ptrace.h> -#include <linux/signal.h> -#include <linux/elf.h> -#include <linux/audit.h> -#include <linux/seccomp.h> -#include <linux/tracehook.h> - -#include <linux/errno.h> -#include <asm/processor.h> -#include <linux/uaccess.h> -#include <asm/asm-offsets.h> -#include <asm/cacheflush.h> -#include <asm/syscall.h> -#include <asm/io.h> - -/* Returns the address where the register at REG_OFFS in P is stashed away. */ -static microblaze_reg_t *reg_save_addr(unsigned reg_offs, - struct task_struct *t) -{ - struct pt_regs *regs; - - /* - * Three basic cases: - * - * (1) A register normally saved before calling the scheduler, is - * available in the kernel entry pt_regs structure at the top - * of the kernel stack. The kernel trap/irq exit path takes - * care to save/restore almost all registers for ptrace'd - * processes. - * - * (2) A call-clobbered register, where the process P entered the - * kernel via [syscall] trap, is not stored anywhere; that's - * OK, because such registers are not expected to be preserved - * when the trap returns anyway (so we don't actually bother to - * test for this case). - * - * (3) A few registers not used at all by the kernel, and so - * normally never saved except by context-switches, are in the - * context switch state. - */ - - /* Register saved during kernel entry (or not available). */ - regs = task_pt_regs(t); - - return (microblaze_reg_t *)((char *)regs + reg_offs); -} - -long arch_ptrace(struct task_struct *child, long request, - unsigned long addr, unsigned long data) -{ - int rval; - unsigned long val = 0; - - switch (request) { - /* Read/write the word at location ADDR in the registers. */ - case PTRACE_PEEKUSR: - case PTRACE_POKEUSR: - pr_debug("PEEKUSR/POKEUSR : 0x%08lx\n", addr); - rval = 0; - if (addr >= PT_SIZE && request == PTRACE_PEEKUSR) { - /* - * Special requests that don't actually correspond - * to offsets in struct pt_regs. - */ - if (addr == PT_TEXT_ADDR) { - val = child->mm->start_code; - } else if (addr == PT_DATA_ADDR) { - val = child->mm->start_data; - } else if (addr == PT_TEXT_LEN) { - val = child->mm->end_code - - child->mm->start_code; - } else { - rval = -EIO; - } - } else if (addr < PT_SIZE && (addr & 0x3) == 0) { - microblaze_reg_t *reg_addr = reg_save_addr(addr, child); - if (request == PTRACE_PEEKUSR) - val = *reg_addr; - else { -#if 1 - *reg_addr = data; -#else - /* MS potential problem on WB system - * Be aware that reg_addr is virtual address - * virt_to_phys conversion is necessary. - * This could be sensible solution. - */ - u32 paddr = virt_to_phys((u32)reg_addr); - invalidate_icache_range(paddr, paddr + 4); - *reg_addr = data; - flush_dcache_range(paddr, paddr + 4); -#endif - } - } else - rval = -EIO; - - if (rval == 0 && request == PTRACE_PEEKUSR) - rval = put_user(val, (unsigned long __user *)data); - break; - default: - rval = ptrace_request(child, request, addr, data); - } - return rval; -} - -asmlinkage long do_syscall_trace_enter(struct pt_regs *regs) -{ - long ret = 0; - - secure_computing(regs->r12); - - if (test_thread_flag(TIF_SYSCALL_TRACE) && - tracehook_report_syscall_entry(regs)) - /* - * Tracing decided this syscall should not happen. - * We'll return a bogus call number to get an ENOSYS - * error, but leave the original number in regs->regs[0]. - */ - ret = -1L; - - audit_syscall_entry(EM_MICROBLAZE, regs->r12, regs->r5, regs->r6, - regs->r7, regs->r8); - - return ret ?: regs->r12; -} - -asmlinkage void do_syscall_trace_leave(struct pt_regs *regs) -{ - int step; - - audit_syscall_exit(regs); - - step = test_thread_flag(TIF_SINGLESTEP); - if (step || test_thread_flag(TIF_SYSCALL_TRACE)) - tracehook_report_syscall_exit(regs, step); -} - -#if 0 -static asmlinkage void syscall_trace(void) -{ - if (!test_thread_flag(TIF_SYSCALL_TRACE)) - return; - if (!(current->ptrace & PT_PTRACED)) - return; - /* The 0x80 provides a way for the tracing parent to distinguish - between a syscall stop and SIGTRAP delivery */ - ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) - ? 0x80 : 0)); - /* - * 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; - } -} -#endif - -void ptrace_disable(struct task_struct *child) -{ - /* nothing to do */ -} |