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-rw-r--r--arch/um/sys-x86/ptrace_32.c273
1 files changed, 0 insertions, 273 deletions
diff --git a/arch/um/sys-x86/ptrace_32.c b/arch/um/sys-x86/ptrace_32.c
deleted file mode 100644
index a174fde..0000000
--- a/arch/um/sys-x86/ptrace_32.c
+++ /dev/null
@@ -1,273 +0,0 @@
-/*
- * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
- */
-
-#include "linux/mm.h"
-#include "linux/sched.h"
-#include "asm/uaccess.h"
-#include "skas.h"
-
-extern int arch_switch_tls(struct task_struct *to);
-
-void arch_switch_to(struct task_struct *to)
-{
- int err = arch_switch_tls(to);
- if (!err)
- return;
-
- if (err != -EINVAL)
- printk(KERN_WARNING "arch_switch_tls failed, errno %d, "
- "not EINVAL\n", -err);
- else
- printk(KERN_WARNING "arch_switch_tls failed, errno = EINVAL\n");
-}
-
-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(KERN_ERR "is_syscall : failed to read "
- "instruction from 0x%lx\n", addr);
- return 1;
- }
- }
- /* int 0x80 or sysenter */
- return (instr == 0x80cd) || (instr == 0x340f);
-}
-
-/* determines which flags the user has access to. */
-/* 1 = access 0 = no access */
-#define FLAG_MASK 0x00044dd5
-
-static const int reg_offsets[] = {
- [EBX] = HOST_EBX,
- [ECX] = HOST_ECX,
- [EDX] = HOST_EDX,
- [ESI] = HOST_ESI,
- [EDI] = HOST_EDI,
- [EBP] = HOST_EBP,
- [EAX] = HOST_EAX,
- [DS] = HOST_DS,
- [ES] = HOST_ES,
- [FS] = HOST_FS,
- [GS] = HOST_GS,
- [EIP] = HOST_IP,
- [CS] = HOST_CS,
- [EFL] = HOST_EFLAGS,
- [UESP] = HOST_SP,
- [SS] = HOST_SS,
-};
-
-int putreg(struct task_struct *child, int regno, unsigned long value)
-{
- regno >>= 2;
- switch (regno) {
- case EBX:
- case ECX:
- case EDX:
- case ESI:
- case EDI:
- case EBP:
- case EAX:
- case EIP:
- case UESP:
- break;
- case FS:
- if (value && (value & 3) != 3)
- return -EIO;
- break;
- case GS:
- if (value && (value & 3) != 3)
- return -EIO;
- break;
- case DS:
- case ES:
- if (value && (value & 3) != 3)
- return -EIO;
- value &= 0xffff;
- break;
- case SS:
- case CS:
- if ((value & 3) != 3)
- return -EIO;
- value &= 0xffff;
- break;
- case EFL:
- value &= FLAG_MASK;
- child->thread.regs.regs.gp[HOST_EFLAGS] |= value;
- return 0;
- case ORIG_EAX:
- child->thread.regs.regs.syscall = value;
- return 0;
- default :
- panic("Bad register in putreg() : %d\n", regno);
- }
- child->thread.regs.regs.gp[reg_offsets[regno]] = 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;
-
- regno >>= 2;
- switch (regno) {
- case ORIG_EAX:
- return child->thread.regs.regs.syscall;
- case FS:
- case GS:
- case DS:
- case ES:
- case SS:
- case CS:
- mask = 0xffff;
- break;
- case EIP:
- case UESP:
- case EAX:
- case EBX:
- case ECX:
- case EDX:
- case ESI:
- case EDI:
- case EBP:
- case EFL:
- break;
- default:
- panic("Bad register in getreg() : %d\n", regno);
- }
- return mask & child->thread.regs.regs.gp[reg_offsets[regno]];
-}
-
-/* read the word at location addr in the USER area. */
-int peek_user(struct task_struct *child, long addr, long data)
-{
- 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 __user *) data);
-}
-
-static int get_fpregs(struct user_i387_struct __user *buf, struct task_struct *child)
-{
- int err, n, cpu = ((struct thread_info *) child->stack)->cpu;
- struct user_i387_struct fpregs;
-
- err = save_fp_registers(userspace_pid[cpu], (unsigned long *) &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;
- struct user_i387_struct fpregs;
-
- n = copy_from_user(&fpregs, buf, sizeof(fpregs));
- if (n > 0)
- return -EFAULT;
-
- return restore_fp_registers(userspace_pid[cpu],
- (unsigned long *) &fpregs);
-}
-
-static int get_fpxregs(struct user_fxsr_struct __user *buf, struct task_struct *child)
-{
- int err, n, cpu = ((struct thread_info *) child->stack)->cpu;
- struct user_fxsr_struct fpregs;
-
- err = save_fpx_registers(userspace_pid[cpu], (unsigned long *) &fpregs);
- if (err)
- return err;
-
- n = copy_to_user(buf, &fpregs, sizeof(fpregs));
- if(n > 0)
- return -EFAULT;
-
- return n;
-}
-
-static int set_fpxregs(struct user_fxsr_struct __user *buf, struct task_struct *child)
-{
- int n, cpu = ((struct thread_info *) child->stack)->cpu;
- struct user_fxsr_struct fpregs;
-
- n = copy_from_user(&fpregs, buf, sizeof(fpregs));
- if (n > 0)
- return -EFAULT;
-
- return restore_fpx_registers(userspace_pid[cpu],
- (unsigned long *) &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_GETFPXREGS: /* Get the child FPU state. */
- ret = get_fpxregs(datap, child);
- break;
- case PTRACE_SETFPXREGS: /* Set the child FPU state. */
- ret = set_fpxregs(datap, child);
- break;
- default:
- ret = -EIO;
- }
- return ret;
-}
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