diff options
Diffstat (limited to 'arch/ppc64/kernel/ptrace32.c')
| -rw-r--r-- | arch/ppc64/kernel/ptrace32.c | 449 |
1 files changed, 0 insertions, 449 deletions
diff --git a/arch/ppc64/kernel/ptrace32.c b/arch/ppc64/kernel/ptrace32.c deleted file mode 100644 index fb8c22d6084..00000000000 --- a/arch/ppc64/kernel/ptrace32.c +++ /dev/null @@ -1,449 +0,0 @@ -/* - * linux/arch/ppc64/kernel/ptrace32.c - * - * PowerPC version - * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) - * - * Derived from "arch/m68k/kernel/ptrace.c" - * Copyright (C) 1994 by Hamish Macdonald - * Taken from linux/kernel/ptrace.c and modified for M680x0. - * linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds - * - * Modified by Cort Dougan (cort@hq.fsmlabs.com) - * and Paul Mackerras (paulus@linuxcare.com.au). - * - * This file is subject to the terms and conditions of the GNU General - * Public License. See the file README.legal in the main directory of - * this archive for more details. - */ - -#include <linux/config.h> -#include <linux/kernel.h> -#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/signal.h> - -#include <asm/uaccess.h> -#include <asm/page.h> -#include <asm/pgtable.h> -#include <asm/system.h> -#include <asm/ptrace-common.h> - -/* - * does not yet catch signals sent when the child dies. - * in exit.c or in signal.c. - */ - -int sys32_ptrace(long request, long pid, unsigned long addr, unsigned long data) -{ - struct task_struct *child; - int ret = -EPERM; - - lock_kernel(); - if (request == PTRACE_TRACEME) { - /* are we already being traced? */ - if (current->ptrace & PT_PTRACED) - goto out; - ret = security_ptrace(current->parent, current); - if (ret) - goto out; - /* set the ptrace bit in the process flags. */ - current->ptrace |= PT_PTRACED; - ret = 0; - goto out; - } - ret = -ESRCH; - read_lock(&tasklist_lock); - child = find_task_by_pid(pid); - if (child) - get_task_struct(child); - read_unlock(&tasklist_lock); - if (!child) - goto out; - - ret = -EPERM; - if (pid == 1) /* you may not mess with init */ - goto out_tsk; - - if (request == PTRACE_ATTACH) { - ret = ptrace_attach(child); - goto out_tsk; - } - - ret = ptrace_check_attach(child, request == PTRACE_KILL); - if (ret < 0) - goto out_tsk; - - switch (request) { - /* when I and D space are separate, these will need to be fixed. */ - case PTRACE_PEEKTEXT: /* read word at location addr. */ - case PTRACE_PEEKDATA: { - unsigned int tmp; - int copied; - - copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0); - ret = -EIO; - if (copied != sizeof(tmp)) - break; - ret = put_user(tmp, (u32 __user *)data); - break; - } - - /* - * Read 4 bytes of the other process' storage - * data is a pointer specifying where the user wants the - * 4 bytes copied into - * addr is a pointer in the user's storage that contains an 8 byte - * address in the other process of the 4 bytes that is to be read - * (this is run in a 32-bit process looking at a 64-bit process) - * when I and D space are separate, these will need to be fixed. - */ - case PPC_PTRACE_PEEKTEXT_3264: - case PPC_PTRACE_PEEKDATA_3264: { - u32 tmp; - int copied; - u32 __user * addrOthers; - - ret = -EIO; - - /* Get the addr in the other process that we want to read */ - if (get_user(addrOthers, (u32 __user * __user *)addr) != 0) - break; - - copied = access_process_vm(child, (u64)addrOthers, &tmp, - sizeof(tmp), 0); - if (copied != sizeof(tmp)) - break; - ret = put_user(tmp, (u32 __user *)data); - break; - } - - /* Read a register (specified by ADDR) out of the "user area" */ - case PTRACE_PEEKUSR: { - int index; - unsigned long tmp; - - ret = -EIO; - /* convert to index and check */ - index = (unsigned long) addr >> 2; - if ((addr & 3) || (index > PT_FPSCR32)) - break; - - if (index < PT_FPR0) { - tmp = get_reg(child, index); - } else { - flush_fp_to_thread(child); - /* - * the user space code considers the floating point - * to be an array of unsigned int (32 bits) - the - * index passed in is based on this assumption. - */ - tmp = ((unsigned int *)child->thread.fpr)[index - PT_FPR0]; - } - ret = put_user((unsigned int)tmp, (u32 __user *)data); - break; - } - - /* - * Read 4 bytes out of the other process' pt_regs area - * data is a pointer specifying where the user wants the - * 4 bytes copied into - * addr is the offset into the other process' pt_regs structure - * that is to be read - * (this is run in a 32-bit process looking at a 64-bit process) - */ - case PPC_PTRACE_PEEKUSR_3264: { - u32 index; - u32 reg32bits; - u64 tmp; - u32 numReg; - u32 part; - - ret = -EIO; - /* Determine which register the user wants */ - index = (u64)addr >> 2; - numReg = index / 2; - /* Determine which part of the register the user wants */ - if (index % 2) - part = 1; /* want the 2nd half of the register (right-most). */ - else - part = 0; /* want the 1st half of the register (left-most). */ - - /* Validate the input - check to see if address is on the wrong boundary or beyond the end of the user area */ - if ((addr & 3) || numReg > PT_FPSCR) - break; - - if (numReg >= PT_FPR0) { - flush_fp_to_thread(child); - tmp = ((unsigned long int *)child->thread.fpr)[numReg - PT_FPR0]; - } else { /* register within PT_REGS struct */ - tmp = get_reg(child, numReg); - } - reg32bits = ((u32*)&tmp)[part]; - ret = put_user(reg32bits, (u32 __user *)data); - break; - } - - /* If I and D space are separate, this will have to be fixed. */ - case PTRACE_POKETEXT: /* write the word at location addr. */ - case PTRACE_POKEDATA: { - unsigned int tmp; - tmp = data; - ret = 0; - if (access_process_vm(child, addr, &tmp, sizeof(tmp), 1) - == sizeof(tmp)) - break; - ret = -EIO; - break; - } - - /* - * Write 4 bytes into the other process' storage - * data is the 4 bytes that the user wants written - * addr is a pointer in the user's storage that contains an - * 8 byte address in the other process where the 4 bytes - * that is to be written - * (this is run in a 32-bit process looking at a 64-bit process) - * when I and D space are separate, these will need to be fixed. - */ - case PPC_PTRACE_POKETEXT_3264: - case PPC_PTRACE_POKEDATA_3264: { - u32 tmp = data; - u32 __user * addrOthers; - - /* Get the addr in the other process that we want to write into */ - ret = -EIO; - if (get_user(addrOthers, (u32 __user * __user *)addr) != 0) - break; - ret = 0; - if (access_process_vm(child, (u64)addrOthers, &tmp, - sizeof(tmp), 1) == sizeof(tmp)) - break; - ret = -EIO; - break; - } - - /* write the word at location addr in the USER area */ - case PTRACE_POKEUSR: { - unsigned long index; - - ret = -EIO; - /* convert to index and check */ - index = (unsigned long) addr >> 2; - if ((addr & 3) || (index > PT_FPSCR32)) - break; - - if (index == PT_ORIG_R3) - break; - if (index < PT_FPR0) { - ret = put_reg(child, index, data); - } else { - flush_fp_to_thread(child); - /* - * the user space code considers the floating point - * to be an array of unsigned int (32 bits) - the - * index passed in is based on this assumption. - */ - ((unsigned int *)child->thread.fpr)[index - PT_FPR0] = data; - ret = 0; - } - break; - } - - /* - * Write 4 bytes into the other process' pt_regs area - * data is the 4 bytes that the user wants written - * addr is the offset into the other process' pt_regs structure - * that is to be written into - * (this is run in a 32-bit process looking at a 64-bit process) - */ - case PPC_PTRACE_POKEUSR_3264: { - u32 index; - u32 numReg; - - ret = -EIO; - /* Determine which register the user wants */ - index = (u64)addr >> 2; - numReg = index / 2; - /* - * Validate the input - check to see if address is on the - * wrong boundary or beyond the end of the user area - */ - if ((addr & 3) || (numReg > PT_FPSCR)) - break; - /* Insure it is a register we let them change */ - if ((numReg == PT_ORIG_R3) - || ((numReg > PT_CCR) && (numReg < PT_FPR0))) - break; - if (numReg >= PT_FPR0) { - flush_fp_to_thread(child); - } - if (numReg == PT_MSR) - data = (data & MSR_DEBUGCHANGE) - | (child->thread.regs->msr & ~MSR_DEBUGCHANGE); - ((u32*)child->thread.regs)[index] = data; - ret = 0; - break; - } - - case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */ - case PTRACE_CONT: { /* restart after signal. */ - ret = -EIO; - if (!valid_signal(data)) - break; - 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); - ret = 0; - break; - } - - /* - * 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. - */ - case PTRACE_KILL: { - ret = 0; - if (child->exit_state == EXIT_ZOMBIE) /* already dead */ - break; - child->exit_code = SIGKILL; - /* make sure the single step bit is not set. */ - clear_single_step(child); - wake_up_process(child); - break; - } - - case PTRACE_SINGLESTEP: { /* set the trap flag. */ - ret = -EIO; - if (!valid_signal(data)) - break; - clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); - set_single_step(child); - child->exit_code = data; - /* give it a chance to run. */ - wake_up_process(child); - ret = 0; - break; - } - - case PTRACE_GET_DEBUGREG: { - ret = -EINVAL; - /* We only support one DABR and no IABRS at the moment */ - if (addr > 0) - break; - ret = put_user(child->thread.dabr, (u32 __user *)data); - break; - } - - case PTRACE_SET_DEBUGREG: - ret = ptrace_set_debugreg(child, addr, data); - break; - - case PTRACE_DETACH: - ret = ptrace_detach(child, data); - break; - - case PPC_PTRACE_GETREGS: { /* Get GPRs 0 - 31. */ - int i; - unsigned long *reg = &((unsigned long *)child->thread.regs)[0]; - unsigned int __user *tmp = (unsigned int __user *)addr; - - for (i = 0; i < 32; i++) { - ret = put_user(*reg, tmp); - if (ret) - break; - reg++; - tmp++; - } - break; - } - - case PPC_PTRACE_SETREGS: { /* Set GPRs 0 - 31. */ - int i; - unsigned long *reg = &((unsigned long *)child->thread.regs)[0]; - unsigned int __user *tmp = (unsigned int __user *)addr; - - for (i = 0; i < 32; i++) { - ret = get_user(*reg, tmp); - if (ret) - break; - reg++; - tmp++; - } - break; - } - - case PPC_PTRACE_GETFPREGS: { /* Get FPRs 0 - 31. */ - int i; - unsigned long *reg = &((unsigned long *)child->thread.fpr)[0]; - unsigned int __user *tmp = (unsigned int __user *)addr; - - flush_fp_to_thread(child); - - for (i = 0; i < 32; i++) { - ret = put_user(*reg, tmp); - if (ret) - break; - reg++; - tmp++; - } - break; - } - - case PPC_PTRACE_SETFPREGS: { /* Get FPRs 0 - 31. */ - int i; - unsigned long *reg = &((unsigned long *)child->thread.fpr)[0]; - unsigned int __user *tmp = (unsigned int __user *)addr; - - flush_fp_to_thread(child); - - for (i = 0; i < 32; i++) { - ret = get_user(*reg, tmp); - if (ret) - break; - reg++; - tmp++; - } - break; - } - - case PTRACE_GETEVENTMSG: - ret = put_user(child->ptrace_message, (unsigned int __user *) data); - break; - -#ifdef CONFIG_ALTIVEC - case PTRACE_GETVRREGS: - /* Get the child altivec register state. */ - flush_altivec_to_thread(child); - ret = get_vrregs((unsigned long __user *)data, child); - break; - - case PTRACE_SETVRREGS: - /* Set the child altivec register state. */ - flush_altivec_to_thread(child); - ret = set_vrregs(child, (unsigned long __user *)data); - break; -#endif - - default: - ret = ptrace_request(child, request, addr, data); - break; - } -out_tsk: - put_task_struct(child); -out: - unlock_kernel(); - return ret; -} |