diff options
Diffstat (limited to 'arch/x86/ia32/ptrace32.c')
| -rw-r--r-- | arch/x86/ia32/ptrace32.c | 411 |
1 files changed, 0 insertions, 411 deletions
diff --git a/arch/x86/ia32/ptrace32.c b/arch/x86/ia32/ptrace32.c deleted file mode 100644 index d5663e2..0000000 --- a/arch/x86/ia32/ptrace32.c +++ /dev/null @@ -1,411 +0,0 @@ -/* - * 32bit ptrace for x86-64. - * - * Copyright 2001,2002 Andi Kleen, SuSE Labs. - * Some parts copied from arch/i386/kernel/ptrace.c. See that file for earlier - * copyright. - * - * This allows to access 64bit processes too; but there is no way to - * see the extended register contents. - */ - -#include <linux/kernel.h> -#include <linux/stddef.h> -#include <linux/sched.h> -#include <linux/syscalls.h> -#include <linux/unistd.h> -#include <linux/mm.h> -#include <linux/err.h> -#include <linux/ptrace.h> -#include <asm/ptrace.h> -#include <asm/compat.h> -#include <asm/uaccess.h> -#include <asm/user32.h> -#include <asm/user.h> -#include <asm/errno.h> -#include <asm/debugreg.h> -#include <asm/i387.h> -#include <asm/fpu32.h> -#include <asm/ia32.h> - -/* - * Determines which flags the user has access to [1 = access, 0 = no access]. - * Prohibits changing ID(21), VIP(20), VIF(19), VM(17), IOPL(12-13), IF(9). - * Also masks reserved bits (31-22, 15, 5, 3, 1). - */ -#define FLAG_MASK 0x54dd5UL - -#define R32(l,q) \ - case offsetof(struct user32, regs.l): \ - regs->q = val; break; - -static int putreg32(struct task_struct *child, unsigned regno, u32 val) -{ - struct pt_regs *regs = task_pt_regs(child); - - switch (regno) { - case offsetof(struct user32, regs.fs): - if (val && (val & 3) != 3) - return -EIO; - child->thread.fsindex = val & 0xffff; - if (child == current) - loadsegment(fs, child->thread.fsindex); - break; - case offsetof(struct user32, regs.gs): - if (val && (val & 3) != 3) - return -EIO; - child->thread.gsindex = val & 0xffff; - if (child == current) - load_gs_index(child->thread.gsindex); - break; - case offsetof(struct user32, regs.ds): - if (val && (val & 3) != 3) - return -EIO; - child->thread.ds = val & 0xffff; - if (child == current) - loadsegment(ds, child->thread.ds); - break; - case offsetof(struct user32, regs.es): - child->thread.es = val & 0xffff; - if (child == current) - loadsegment(es, child->thread.ds); - break; - case offsetof(struct user32, regs.ss): - if ((val & 3) != 3) - return -EIO; - regs->ss = val & 0xffff; - break; - case offsetof(struct user32, regs.cs): - if ((val & 3) != 3) - return -EIO; - regs->cs = val & 0xffff; - break; - - R32(ebx, bx); - R32(ecx, cx); - R32(edx, dx); - R32(edi, di); - R32(esi, si); - R32(ebp, bp); - R32(eax, ax); - R32(orig_eax, orig_ax); - R32(eip, ip); - R32(esp, sp); - - case offsetof(struct user32, regs.eflags): - val &= FLAG_MASK; - /* - * If the user value contains TF, mark that - * it was not "us" (the debugger) that set it. - * If not, make sure it stays set if we had. - */ - if (val & X86_EFLAGS_TF) - clear_tsk_thread_flag(child, TIF_FORCED_TF); - else if (test_tsk_thread_flag(child, TIF_FORCED_TF)) - val |= X86_EFLAGS_TF; - regs->flags = val | (regs->flags & ~FLAG_MASK); - break; - - case offsetof(struct user32, u_debugreg[0]) ... - offsetof(struct user32, u_debugreg[7]): - regno -= offsetof(struct user32, u_debugreg[0]); - return ptrace_set_debugreg(child, regno / 4, val); - - default: - if (regno > sizeof(struct user32) || (regno & 3)) - return -EIO; - - /* - * Other dummy fields in the virtual user structure - * are ignored - */ - break; - } - return 0; -} - -#undef R32 - -#define R32(l,q) \ - case offsetof(struct user32, regs.l): \ - *val = regs->q; break - -static int getreg32(struct task_struct *child, unsigned regno, u32 *val) -{ - struct pt_regs *regs = task_pt_regs(child); - - switch (regno) { - case offsetof(struct user32, regs.fs): - *val = child->thread.fsindex; - if (child == current) - asm("movl %%fs,%0" : "=r" (*val)); - break; - case offsetof(struct user32, regs.gs): - *val = child->thread.gsindex; - if (child == current) - asm("movl %%gs,%0" : "=r" (*val)); - break; - case offsetof(struct user32, regs.ds): - *val = child->thread.ds; - if (child == current) - asm("movl %%ds,%0" : "=r" (*val)); - break; - case offsetof(struct user32, regs.es): - *val = child->thread.es; - if (child == current) - asm("movl %%es,%0" : "=r" (*val)); - break; - - R32(cs, cs); - R32(ss, ss); - R32(ebx, bx); - R32(ecx, cx); - R32(edx, dx); - R32(edi, di); - R32(esi, si); - R32(ebp, bp); - R32(eax, ax); - R32(orig_eax, orig_ax); - R32(eip, ip); - R32(esp, sp); - - case offsetof(struct user32, regs.eflags): - /* - * If the debugger set TF, hide it from the readout. - */ - *val = regs->flags; - if (test_tsk_thread_flag(child, TIF_FORCED_TF)) - *val &= ~X86_EFLAGS_TF; - break; - - case offsetof(struct user32, u_debugreg[0]) ... - offsetof(struct user32, u_debugreg[7]): - regno -= offsetof(struct user32, u_debugreg[0]); - *val = ptrace_get_debugreg(child, regno / 4); - break; - - default: - if (regno > sizeof(struct user32) || (regno & 3)) - return -EIO; - - /* - * Other dummy fields in the virtual user structure - * are ignored - */ - *val = 0; - break; - } - return 0; -} - -#undef R32 - -static long ptrace32_siginfo(unsigned request, u32 pid, u32 addr, u32 data) -{ - siginfo_t __user *si = compat_alloc_user_space(sizeof(siginfo_t)); - compat_siginfo_t __user *si32 = compat_ptr(data); - siginfo_t ssi; - int ret; - - if (request == PTRACE_SETSIGINFO) { - memset(&ssi, 0, sizeof(siginfo_t)); - ret = copy_siginfo_from_user32(&ssi, si32); - if (ret) - return ret; - if (copy_to_user(si, &ssi, sizeof(siginfo_t))) - return -EFAULT; - } - ret = sys_ptrace(request, pid, addr, (unsigned long)si); - if (ret) - return ret; - if (request == PTRACE_GETSIGINFO) { - if (copy_from_user(&ssi, si, sizeof(siginfo_t))) - return -EFAULT; - ret = copy_siginfo_to_user32(si32, &ssi); - } - return ret; -} - -asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) -{ - struct task_struct *child; - struct pt_regs *childregs; - void __user *datap = compat_ptr(data); - int ret; - __u32 val; - - switch (request) { - case PTRACE_TRACEME: - case PTRACE_ATTACH: - case PTRACE_KILL: - case PTRACE_CONT: - case PTRACE_SINGLESTEP: - case PTRACE_SINGLEBLOCK: - case PTRACE_DETACH: - case PTRACE_SYSCALL: - case PTRACE_OLDSETOPTIONS: - case PTRACE_SETOPTIONS: - case PTRACE_SET_THREAD_AREA: - case PTRACE_GET_THREAD_AREA: - return sys_ptrace(request, pid, addr, data); - - default: - return -EINVAL; - - case PTRACE_PEEKTEXT: - case PTRACE_PEEKDATA: - case PTRACE_POKEDATA: - case PTRACE_POKETEXT: - case PTRACE_POKEUSR: - case PTRACE_PEEKUSR: - case PTRACE_GETREGS: - case PTRACE_SETREGS: - case PTRACE_SETFPREGS: - case PTRACE_GETFPREGS: - case PTRACE_SETFPXREGS: - case PTRACE_GETFPXREGS: - case PTRACE_GETEVENTMSG: - break; - - case PTRACE_SETSIGINFO: - case PTRACE_GETSIGINFO: - return ptrace32_siginfo(request, pid, addr, data); - } - - child = ptrace_get_task_struct(pid); - if (IS_ERR(child)) - return PTR_ERR(child); - - ret = ptrace_check_attach(child, request == PTRACE_KILL); - if (ret < 0) - goto out; - - childregs = task_pt_regs(child); - - switch (request) { - case PTRACE_PEEKDATA: - case PTRACE_PEEKTEXT: - ret = 0; - if (access_process_vm(child, addr, &val, sizeof(u32), 0) != - sizeof(u32)) - ret = -EIO; - else - ret = put_user(val, (unsigned int __user *)datap); - break; - - case PTRACE_POKEDATA: - case PTRACE_POKETEXT: - ret = 0; - if (access_process_vm(child, addr, &data, sizeof(u32), 1) != - sizeof(u32)) - ret = -EIO; - break; - - case PTRACE_PEEKUSR: - ret = getreg32(child, addr, &val); - if (ret == 0) - ret = put_user(val, (__u32 __user *)datap); - break; - - case PTRACE_POKEUSR: - ret = putreg32(child, addr, data); - break; - - case PTRACE_GETREGS: { /* Get all gp regs from the child. */ - int i; - - if (!access_ok(VERIFY_WRITE, datap, 16*4)) { - ret = -EIO; - break; - } - ret = 0; - for (i = 0; i <= 16*4; i += sizeof(__u32)) { - getreg32(child, i, &val); - ret |= __put_user(val, (u32 __user *)datap); - datap += sizeof(u32); - } - break; - } - - case PTRACE_SETREGS: { /* Set all gp regs in the child. */ - unsigned long tmp; - int i; - - if (!access_ok(VERIFY_READ, datap, 16*4)) { - ret = -EIO; - break; - } - ret = 0; - for (i = 0; i <= 16*4; i += sizeof(u32)) { - ret |= __get_user(tmp, (u32 __user *)datap); - putreg32(child, i, tmp); - datap += sizeof(u32); - } - break; - } - - case PTRACE_GETFPREGS: - ret = -EIO; - if (!access_ok(VERIFY_READ, compat_ptr(data), - sizeof(struct user_i387_struct))) - break; - save_i387_ia32(child, datap, childregs, 1); - ret = 0; - break; - - case PTRACE_SETFPREGS: - ret = -EIO; - if (!access_ok(VERIFY_WRITE, datap, - sizeof(struct user_i387_struct))) - break; - ret = 0; - /* don't check EFAULT to be bug-to-bug compatible to i386 */ - restore_i387_ia32(child, datap, 1); - break; - - case PTRACE_GETFPXREGS: { - struct user32_fxsr_struct __user *u = datap; - - init_fpu(child); - ret = -EIO; - if (!access_ok(VERIFY_WRITE, u, sizeof(*u))) - break; - ret = -EFAULT; - if (__copy_to_user(u, &child->thread.i387.fxsave, sizeof(*u))) - break; - ret = __put_user(childregs->cs, &u->fcs); - ret |= __put_user(child->thread.ds, &u->fos); - break; - } - case PTRACE_SETFPXREGS: { - struct user32_fxsr_struct __user *u = datap; - - unlazy_fpu(child); - ret = -EIO; - if (!access_ok(VERIFY_READ, u, sizeof(*u))) - break; - /* - * no checking to be bug-to-bug compatible with i386. - * but silence warning - */ - if (__copy_from_user(&child->thread.i387.fxsave, u, sizeof(*u))) - ; - set_stopped_child_used_math(child); - child->thread.i387.fxsave.mxcsr &= mxcsr_feature_mask; - ret = 0; - break; - } - - case PTRACE_GETEVENTMSG: - ret = put_user(child->ptrace_message, - (unsigned int __user *)compat_ptr(data)); - break; - - default: - BUG(); - } - - out: - put_task_struct(child); - return ret; -} |