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-rw-r--r--arch/x86/ia32/ptrace32.c411
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;
-}
generated by cgit v1.1 at 2024-12-27 08:04:00 +0000