+++ /dev/null
-/*
- * 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;
-}
+++ /dev/null
-/* By Ross Biro 1/23/92 */
-/*
- * Pentium III FXSR, SSE support
- * Gareth Hughes <gareth@valinux.com>, May 2000
- *
- * x86-64 port 2000-2002 Andi Kleen
- */
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/errno.h>
-#include <linux/ptrace.h>
-#include <linux/user.h>
-#include <linux/security.h>
-#include <linux/audit.h>
-#include <linux/seccomp.h>
-#include <linux/signal.h>
-
-#include <asm/uaccess.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/processor.h>
-#include <asm/prctl.h>
-#include <asm/i387.h>
-#include <asm/debugreg.h>
-#include <asm/ldt.h>
-#include <asm/desc.h>
-#include <asm/proto.h>
-#include <asm/ia32.h>
-
-/*
- * does not yet catch signals sent when the child dies.
- * in exit.c or in signal.c.
- */
-
-/*
- * 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 (63-22, 15, 5, 3, 1).
- */
-#define FLAG_MASK 0x54dd5UL
-
-/*
- * Called by kernel/ptrace.c when detaching..
- *
- * Make sure the single step bit is not set.
- */
-void ptrace_disable(struct task_struct *child)
-{
- user_disable_single_step(child);
-}
-
-static unsigned long *pt_regs_access(struct pt_regs *regs, unsigned long offset)
-{
- BUILD_BUG_ON(offsetof(struct pt_regs, r15) != 0);
- return ®s->r15 + (offset / sizeof(regs->r15));
-}
-
-static int putreg(struct task_struct *child,
- unsigned long regno, unsigned long value)
-{
- struct pt_regs *regs = task_pt_regs(child);
- switch (regno) {
- case offsetof(struct user_regs_struct,fs):
- if (value && (value & 3) != 3)
- return -EIO;
- child->thread.fsindex = value & 0xffff;
- if (child == current)
- loadsegment(fs, child->thread.fsindex);
- return 0;
- case offsetof(struct user_regs_struct,gs):
- if (value && (value & 3) != 3)
- return -EIO;
- child->thread.gsindex = value & 0xffff;
- if (child == current)
- load_gs_index(child->thread.gsindex);
- return 0;
- case offsetof(struct user_regs_struct,ds):
- if (value && (value & 3) != 3)
- return -EIO;
- child->thread.ds = value & 0xffff;
- if (child == current)
- loadsegment(ds, child->thread.ds);
- return 0;
- case offsetof(struct user_regs_struct,es):
- if (value && (value & 3) != 3)
- return -EIO;
- child->thread.es = value & 0xffff;
- if (child == current)
- loadsegment(es, child->thread.es);
- return 0;
- case offsetof(struct user_regs_struct,ss):
- if ((value & 3) != 3)
- return -EIO;
- value &= 0xffff;
- return 0;
- case offsetof(struct user_regs_struct,fs_base):
- if (value >= TASK_SIZE_OF(child))
- return -EIO;
- /*
- * When changing the segment base, use do_arch_prctl
- * to set either thread.fs or thread.fsindex and the
- * corresponding GDT slot.
- */
- if (child->thread.fs != value)
- return do_arch_prctl(child, ARCH_SET_FS, value);
- return 0;
- case offsetof(struct user_regs_struct,gs_base):
- /*
- * Exactly the same here as the %fs handling above.
- */
- if (value >= TASK_SIZE_OF(child))
- return -EIO;
- if (child->thread.gs != value)
- return do_arch_prctl(child, ARCH_SET_GS, value);
- return 0;
- case offsetof(struct user_regs_struct,flags):
- value &= 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 (value & X86_EFLAGS_TF)
- clear_tsk_thread_flag(child, TIF_FORCED_TF);
- else if (test_tsk_thread_flag(child, TIF_FORCED_TF))
- value |= X86_EFLAGS_TF;
- value |= regs->flags & ~FLAG_MASK;
- break;
- case offsetof(struct user_regs_struct,cs):
- if ((value & 3) != 3)
- return -EIO;
- value &= 0xffff;
- break;
- }
- *pt_regs_access(regs, regno) = value;
- return 0;
-}
-
-static unsigned long getreg(struct task_struct *child, unsigned long regno)
-{
- struct pt_regs *regs = task_pt_regs(child);
- unsigned long val;
- unsigned int seg;
- switch (regno) {
- case offsetof(struct user_regs_struct, fs):
- if (child == current) {
- /* Older gas can't assemble movq %?s,%r?? */
- asm("movl %%fs,%0" : "=r" (seg));
- return seg;
- }
- return child->thread.fsindex;
- case offsetof(struct user_regs_struct, gs):
- if (child == current) {
- asm("movl %%gs,%0" : "=r" (seg));
- return seg;
- }
- return child->thread.gsindex;
- case offsetof(struct user_regs_struct, ds):
- if (child == current) {
- asm("movl %%ds,%0" : "=r" (seg));
- return seg;
- }
- return child->thread.ds;
- case offsetof(struct user_regs_struct, es):
- if (child == current) {
- asm("movl %%es,%0" : "=r" (seg));
- return seg;
- }
- return child->thread.es;
- case offsetof(struct user_regs_struct, fs_base):
- /*
- * do_arch_prctl may have used a GDT slot instead of
- * the MSR. To userland, it appears the same either
- * way, except the %fs segment selector might not be 0.
- */
- if (child->thread.fs != 0)
- return child->thread.fs;
- seg = child->thread.fsindex;
- if (child == current)
- asm("movl %%fs,%0" : "=r" (seg));
- if (seg != FS_TLS_SEL)
- return 0;
- return get_desc_base(&child->thread.tls_array[FS_TLS]);
- case offsetof(struct user_regs_struct, gs_base):
- /*
- * Exactly the same here as the %fs handling above.
- */
- if (child->thread.gs != 0)
- return child->thread.gs;
- seg = child->thread.gsindex;
- if (child == current)
- asm("movl %%gs,%0" : "=r" (seg));
- if (seg != GS_TLS_SEL)
- return 0;
- return get_desc_base(&child->thread.tls_array[GS_TLS]);
- case offsetof(struct user_regs_struct, flags):
- /*
- * If the debugger set TF, hide it from the readout.
- */
- val = regs->flags;
- if (test_tsk_thread_flag(child, TIF_IA32))
- val &= 0xffffffff;
- if (test_tsk_thread_flag(child, TIF_FORCED_TF))
- val &= ~X86_EFLAGS_TF;
- return val;
- default:
- val = *pt_regs_access(regs, regno);
- if (test_tsk_thread_flag(child, TIF_IA32))
- val &= 0xffffffff;
- return val;
- }
-
-}
-
-unsigned long ptrace_get_debugreg(struct task_struct *child, int n)
-{
- switch (n) {
- case 0: return child->thread.debugreg0;
- case 1: return child->thread.debugreg1;
- case 2: return child->thread.debugreg2;
- case 3: return child->thread.debugreg3;
- case 6: return child->thread.debugreg6;
- case 7: return child->thread.debugreg7;
- }
- return 0;
-}
-
-int ptrace_set_debugreg(struct task_struct *child, int n, unsigned long data)
-{
- int i;
-
- if (n < 4) {
- int dsize = test_tsk_thread_flag(child, TIF_IA32) ? 3 : 7;
- if (unlikely(data >= TASK_SIZE_OF(child) - dsize))
- return -EIO;
- }
-
- switch (n) {
- case 0: child->thread.debugreg0 = data; break;
- case 1: child->thread.debugreg1 = data; break;
- case 2: child->thread.debugreg2 = data; break;
- case 3: child->thread.debugreg3 = data; break;
-
- case 6:
- if (data >> 32)
- return -EIO;
- child->thread.debugreg6 = data;
- break;
-
- case 7:
- /*
- * See ptrace_32.c for an explanation of this awkward check.
- */
- data &= ~DR_CONTROL_RESERVED;
- for (i = 0; i < 4; i++)
- if ((0x5554 >> ((data >> (16 + 4*i)) & 0xf)) & 1)
- return -EIO;
- child->thread.debugreg7 = data;
- if (data)
- set_tsk_thread_flag(child, TIF_DEBUG);
- else
- clear_tsk_thread_flag(child, TIF_DEBUG);
- break;
- }
-
- return 0;
-}
-
-long arch_ptrace(struct task_struct *child, long request, long addr, long data)
-{
- long ret;
- unsigned ui;
-
- 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:
- ret = generic_ptrace_peekdata(child, addr, data);
- break;
-
- /* read the word at location addr in the USER area. */
- case PTRACE_PEEKUSR: {
- unsigned long tmp;
-
- ret = -EIO;
- if ((addr & 7) ||
- addr > sizeof(struct user) - 7)
- break;
-
- tmp = 0;
- if (addr < sizeof(struct user_regs_struct))
- tmp = getreg(child, addr);
- else if (addr >= offsetof(struct user, u_debugreg[0])) {
- addr -= offsetof(struct user, u_debugreg[0]);
- tmp = ptrace_get_debugreg(child, addr / sizeof(long));
- }
-
- ret = put_user(tmp,(unsigned long __user *) data);
- break;
- }
-
- /* when I and D space are separate, this will have to be fixed. */
- case PTRACE_POKETEXT: /* write the word at location addr. */
- case PTRACE_POKEDATA:
- ret = generic_ptrace_pokedata(child, addr, data);
- break;
-
- case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
- ret = -EIO;
- if ((addr & 7) ||
- addr > sizeof(struct user) - 7)
- break;
-
- if (addr < sizeof(struct user_regs_struct))
- ret = putreg(child, addr, data);
- else if (addr >= offsetof(struct user, u_debugreg[0])) {
- addr -= offsetof(struct user, u_debugreg[0]);
- ret = ptrace_set_debugreg(child,
- addr / sizeof(long), data);
- }
- break;
-
-#ifdef CONFIG_IA32_EMULATION
- /* This makes only sense with 32bit programs. Allow a
- 64bit debugger to fully examine them too. Better
- don't use it against 64bit processes, use
- PTRACE_ARCH_PRCTL instead. */
- case PTRACE_GET_THREAD_AREA:
- if (addr < 0)
- return -EIO;
- ret = do_get_thread_area(child, addr,
- (struct user_desc __user *) data);
-
- break;
- case PTRACE_SET_THREAD_AREA:
- if (addr < 0)
- return -EIO;
- ret = do_set_thread_area(child, addr,
- (struct user_desc __user *) data, 0);
- break;
-#endif
- /* normal 64bit interface to access TLS data.
- Works just like arch_prctl, except that the arguments
- are reversed. */
- case PTRACE_ARCH_PRCTL:
- ret = do_arch_prctl(child, data, addr);
- break;
-
- case PTRACE_GETREGS: { /* Get all gp regs from the child. */
- if (!access_ok(VERIFY_WRITE, (unsigned __user *)data,
- sizeof(struct user_regs_struct))) {
- ret = -EIO;
- break;
- }
- ret = 0;
- for (ui = 0; ui < sizeof(struct user_regs_struct); ui += sizeof(long)) {
- ret |= __put_user(getreg(child, ui),(unsigned long __user *) data);
- data += sizeof(long);
- }
- break;
- }
-
- case PTRACE_SETREGS: { /* Set all gp regs in the child. */
- unsigned long tmp;
- if (!access_ok(VERIFY_READ, (unsigned __user *)data,
- sizeof(struct user_regs_struct))) {
- ret = -EIO;
- break;
- }
- ret = 0;
- for (ui = 0; ui < sizeof(struct user_regs_struct); ui += sizeof(long)) {
- ret = __get_user(tmp, (unsigned long __user *) data);
- if (ret)
- break;
- ret = putreg(child, ui, tmp);
- if (ret)
- break;
- data += sizeof(long);
- }
- break;
- }
-
- case PTRACE_GETFPREGS: { /* Get the child extended FPU state. */
- if (!access_ok(VERIFY_WRITE, (unsigned __user *)data,
- sizeof(struct user_i387_struct))) {
- ret = -EIO;
- break;
- }
- ret = get_fpregs((struct user_i387_struct __user *)data, child);
- break;
- }
-
- case PTRACE_SETFPREGS: { /* Set the child extended FPU state. */
- if (!access_ok(VERIFY_READ, (unsigned __user *)data,
- sizeof(struct user_i387_struct))) {
- ret = -EIO;
- break;
- }
- set_stopped_child_used_math(child);
- ret = set_fpregs(child, (struct user_i387_struct __user *)data);
- break;
- }
-
- default:
- ret = ptrace_request(child, request, addr, data);
- break;
- }
- return ret;
-}
-
-static void syscall_trace(struct pt_regs *regs)
-{
-
-#if 0
- printk("trace %s ip %lx sp %lx ax %d origrax %d caller %lx tiflags %x ptrace %x\n",
- current->comm,
- regs->ip, regs->sp, regs->ax, regs->orig_ax, __builtin_return_address(0),
- current_thread_info()->flags, current->ptrace);
-#endif
-
- ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
- ? 0x80 : 0));
- /*
- * this isn't the same as continuing with a signal, but it will do
- * for normal use. strace only continues with a signal if the
- * stopping signal is not SIGTRAP. -brl
- */
- if (current->exit_code) {
- send_sig(current->exit_code, current, 1);
- current->exit_code = 0;
- }
-}
-
-asmlinkage void syscall_trace_enter(struct pt_regs *regs)
-{
- /* do the secure computing check first */
- secure_computing(regs->orig_ax);
-
- if (test_thread_flag(TIF_SYSCALL_TRACE)
- && (current->ptrace & PT_PTRACED))
- syscall_trace(regs);
-
- if (unlikely(current->audit_context)) {
- if (test_thread_flag(TIF_IA32)) {
- audit_syscall_entry(AUDIT_ARCH_I386,
- regs->orig_ax,
- regs->bx, regs->cx,
- regs->dx, regs->si);
- } else {
- audit_syscall_entry(AUDIT_ARCH_X86_64,
- regs->orig_ax,
- regs->di, regs->si,
- regs->dx, regs->r10);
- }
- }
-}
-
-asmlinkage void syscall_trace_leave(struct pt_regs *regs)
-{
- if (unlikely(current->audit_context))
- audit_syscall_exit(AUDITSC_RESULT(regs->ax), regs->ax);
-
- if ((test_thread_flag(TIF_SYSCALL_TRACE)
- || test_thread_flag(TIF_SINGLESTEP))
- && (current->ptrace & PT_PTRACED))
- syscall_trace(regs);
-}
projects / linux-2.6 / commitdiff