diff options
Diffstat (limited to 'arch/um/sys-x86/ptrace_64.c')
| -rw-r--r-- | arch/um/sys-x86/ptrace_64.c | 271 |
1 files changed, 0 insertions, 271 deletions
diff --git a/arch/um/sys-x86/ptrace_64.c b/arch/um/sys-x86/ptrace_64.c deleted file mode 100644 index 44e68e0c0d1..00000000000 --- a/arch/um/sys-x86/ptrace_64.c +++ /dev/null @@ -1,271 +0,0 @@ -/* - * Copyright 2003 PathScale, Inc. - * Copyright (C) 2003 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) - * - * Licensed under the GPL - */ - -#include <linux/mm.h> -#include <linux/sched.h> -#include <linux/errno.h> -#define __FRAME_OFFSETS -#include <asm/ptrace.h> -#include <asm/uaccess.h> - -/* - * determines which flags the user has access to. - * 1 = access 0 = no access - */ -#define FLAG_MASK 0x44dd5UL - -static const int reg_offsets[] = -{ - [R8 >> 3] = HOST_R8, - [R9 >> 3] = HOST_R9, - [R10 >> 3] = HOST_R10, - [R11 >> 3] = HOST_R11, - [R12 >> 3] = HOST_R12, - [R13 >> 3] = HOST_R13, - [R14 >> 3] = HOST_R14, - [R15 >> 3] = HOST_R15, - [RIP >> 3] = HOST_IP, - [RSP >> 3] = HOST_SP, - [RAX >> 3] = HOST_RAX, - [RBX >> 3] = HOST_RBX, - [RCX >> 3] = HOST_RCX, - [RDX >> 3] = HOST_RDX, - [RSI >> 3] = HOST_RSI, - [RDI >> 3] = HOST_RDI, - [RBP >> 3] = HOST_RBP, - [CS >> 3] = HOST_CS, - [SS >> 3] = HOST_SS, - [FS_BASE >> 3] = HOST_FS_BASE, - [GS_BASE >> 3] = HOST_GS_BASE, - [DS >> 3] = HOST_DS, - [ES >> 3] = HOST_ES, - [FS >> 3] = HOST_FS, - [GS >> 3] = HOST_GS, - [EFLAGS >> 3] = HOST_EFLAGS, - [ORIG_RAX >> 3] = HOST_ORIG_RAX, -}; - -int putreg(struct task_struct *child, int regno, unsigned long value) -{ -#ifdef TIF_IA32 - /* - * Some code in the 64bit emulation may not be 64bit clean. - * Don't take any chances. - */ - if (test_tsk_thread_flag(child, TIF_IA32)) - value &= 0xffffffff; -#endif - switch (regno) { - case R8: - case R9: - case R10: - case R11: - case R12: - case R13: - case R14: - case R15: - case RIP: - case RSP: - case RAX: - case RBX: - case RCX: - case RDX: - case RSI: - case RDI: - case RBP: - case ORIG_RAX: - break; - - case FS: - case GS: - case DS: - case ES: - case SS: - case CS: - if (value && (value & 3) != 3) - return -EIO; - value &= 0xffff; - break; - - case FS_BASE: - case GS_BASE: - if (!((value >> 48) == 0 || (value >> 48) == 0xffff)) - return -EIO; - break; - - case EFLAGS: - value &= FLAG_MASK; - child->thread.regs.regs.gp[HOST_EFLAGS] |= value; - return 0; - - default: - panic("Bad register in putreg(): %d\n", regno); - } - - child->thread.regs.regs.gp[reg_offsets[regno >> 3]] = value; - return 0; -} - -int poke_user(struct task_struct *child, long addr, long data) -{ - if ((addr & 3) || addr < 0) - return -EIO; - - if (addr < MAX_REG_OFFSET) - return putreg(child, addr, data); - else if ((addr >= offsetof(struct user, u_debugreg[0])) && - (addr <= offsetof(struct user, u_debugreg[7]))) { - addr -= offsetof(struct user, u_debugreg[0]); - addr = addr >> 2; - if ((addr == 4) || (addr == 5)) - return -EIO; - child->thread.arch.debugregs[addr] = data; - return 0; - } - return -EIO; -} - -unsigned long getreg(struct task_struct *child, int regno) -{ - unsigned long mask = ~0UL; -#ifdef TIF_IA32 - if (test_tsk_thread_flag(child, TIF_IA32)) - mask = 0xffffffff; -#endif - switch (regno) { - case R8: - case R9: - case R10: - case R11: - case R12: - case R13: - case R14: - case R15: - case RIP: - case RSP: - case RAX: - case RBX: - case RCX: - case RDX: - case RSI: - case RDI: - case RBP: - case ORIG_RAX: - case EFLAGS: - case FS_BASE: - case GS_BASE: - break; - case FS: - case GS: - case DS: - case ES: - case SS: - case CS: - mask = 0xffff; - break; - default: - panic("Bad register in getreg: %d\n", regno); - } - return mask & child->thread.regs.regs.gp[reg_offsets[regno >> 3]]; -} - -int peek_user(struct task_struct *child, long addr, long data) -{ - /* read the word at location addr in the USER area. */ - unsigned long tmp; - - if ((addr & 3) || addr < 0) - return -EIO; - - tmp = 0; /* Default return condition */ - if (addr < MAX_REG_OFFSET) - tmp = getreg(child, addr); - else if ((addr >= offsetof(struct user, u_debugreg[0])) && - (addr <= offsetof(struct user, u_debugreg[7]))) { - addr -= offsetof(struct user, u_debugreg[0]); - addr = addr >> 2; - tmp = child->thread.arch.debugregs[addr]; - } - return put_user(tmp, (unsigned long *) data); -} - -/* XXX Mostly copied from sys-i386 */ -int is_syscall(unsigned long addr) -{ - unsigned short instr; - int n; - - n = copy_from_user(&instr, (void __user *) addr, sizeof(instr)); - if (n) { - /* - * access_process_vm() grants access to vsyscall and stub, - * while copy_from_user doesn't. Maybe access_process_vm is - * slow, but that doesn't matter, since it will be called only - * in case of singlestepping, if copy_from_user failed. - */ - n = access_process_vm(current, addr, &instr, sizeof(instr), 0); - if (n != sizeof(instr)) { - printk("is_syscall : failed to read instruction from " - "0x%lx\n", addr); - return 1; - } - } - /* sysenter */ - return instr == 0x050f; -} - -static int get_fpregs(struct user_i387_struct __user *buf, struct task_struct *child) -{ - int err, n, cpu = ((struct thread_info *) child->stack)->cpu; - long fpregs[HOST_FP_SIZE]; - - BUG_ON(sizeof(*buf) != sizeof(fpregs)); - err = save_fp_registers(userspace_pid[cpu], fpregs); - if (err) - return err; - - n = copy_to_user(buf, fpregs, sizeof(fpregs)); - if (n > 0) - return -EFAULT; - - return n; -} - -static int set_fpregs(struct user_i387_struct __user *buf, struct task_struct *child) -{ - int n, cpu = ((struct thread_info *) child->stack)->cpu; - long fpregs[HOST_FP_SIZE]; - - BUG_ON(sizeof(*buf) != sizeof(fpregs)); - n = copy_from_user(fpregs, buf, sizeof(fpregs)); - if (n > 0) - return -EFAULT; - - return restore_fp_registers(userspace_pid[cpu], fpregs); -} - -long subarch_ptrace(struct task_struct *child, long request, - unsigned long addr, unsigned long data) -{ - int ret = -EIO; - void __user *datap = (void __user *) data; - - switch (request) { - case PTRACE_GETFPREGS: /* Get the child FPU state. */ - ret = get_fpregs(datap, child); - break; - case PTRACE_SETFPREGS: /* Set the child FPU state. */ - ret = set_fpregs(datap, child); - break; - case PTRACE_ARCH_PRCTL: - /* XXX Calls ptrace on the host - needs some SMP thinking */ - ret = arch_prctl(child, data, (void __user *) addr); - break; - } - - return ret; -} |