mirror of
https://github.com/edk2-porting/linux-next.git
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x86: x86 ptrace merge removals
This removes the old separate 64-bit and ia32 ptrace source files. They are no longer used. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Roland McGrath
Ingo Molnar
parent
cbc9d9d982
commit
25149b62d3
@ -1,411 +0,0 @@
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/*
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* 32bit ptrace for x86-64.
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*
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* Copyright 2001,2002 Andi Kleen, SuSE Labs.
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* Some parts copied from arch/i386/kernel/ptrace.c. See that file for earlier
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* copyright.
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*
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* This allows to access 64bit processes too; but there is no way to
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* see the extended register contents.
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*/
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#include <linux/kernel.h>
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#include <linux/stddef.h>
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#include <linux/sched.h>
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#include <linux/syscalls.h>
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#include <linux/unistd.h>
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#include <linux/mm.h>
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#include <linux/err.h>
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#include <linux/ptrace.h>
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#include <asm/ptrace.h>
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#include <asm/compat.h>
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#include <asm/uaccess.h>
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#include <asm/user32.h>
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#include <asm/user.h>
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#include <asm/errno.h>
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#include <asm/debugreg.h>
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#include <asm/i387.h>
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#include <asm/fpu32.h>
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#include <asm/ia32.h>
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/*
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* Determines which flags the user has access to [1 = access, 0 = no access].
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* Prohibits changing ID(21), VIP(20), VIF(19), VM(17), IOPL(12-13), IF(9).
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* Also masks reserved bits (31-22, 15, 5, 3, 1).
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*/
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#define FLAG_MASK 0x54dd5UL
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#define R32(l,q) \
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case offsetof(struct user32, regs.l): \
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regs->q = val; break;
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static int putreg32(struct task_struct *child, unsigned regno, u32 val)
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{
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struct pt_regs *regs = task_pt_regs(child);
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switch (regno) {
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case offsetof(struct user32, regs.fs):
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if (val && (val & 3) != 3)
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return -EIO;
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child->thread.fsindex = val & 0xffff;
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if (child == current)
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loadsegment(fs, child->thread.fsindex);
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break;
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case offsetof(struct user32, regs.gs):
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if (val && (val & 3) != 3)
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return -EIO;
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child->thread.gsindex = val & 0xffff;
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if (child == current)
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load_gs_index(child->thread.gsindex);
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break;
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case offsetof(struct user32, regs.ds):
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if (val && (val & 3) != 3)
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return -EIO;
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child->thread.ds = val & 0xffff;
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if (child == current)
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loadsegment(ds, child->thread.ds);
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break;
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case offsetof(struct user32, regs.es):
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child->thread.es = val & 0xffff;
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if (child == current)
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loadsegment(es, child->thread.ds);
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break;
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case offsetof(struct user32, regs.ss):
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if ((val & 3) != 3)
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return -EIO;
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regs->ss = val & 0xffff;
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break;
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case offsetof(struct user32, regs.cs):
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if ((val & 3) != 3)
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return -EIO;
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regs->cs = val & 0xffff;
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break;
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R32(ebx, bx);
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R32(ecx, cx);
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R32(edx, dx);
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R32(edi, di);
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R32(esi, si);
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R32(ebp, bp);
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R32(eax, ax);
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R32(orig_eax, orig_ax);
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R32(eip, ip);
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R32(esp, sp);
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case offsetof(struct user32, regs.eflags):
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val &= FLAG_MASK;
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/*
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* If the user value contains TF, mark that
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* it was not "us" (the debugger) that set it.
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* If not, make sure it stays set if we had.
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*/
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if (val & X86_EFLAGS_TF)
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clear_tsk_thread_flag(child, TIF_FORCED_TF);
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else if (test_tsk_thread_flag(child, TIF_FORCED_TF))
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val |= X86_EFLAGS_TF;
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regs->flags = val | (regs->flags & ~FLAG_MASK);
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break;
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case offsetof(struct user32, u_debugreg[0]) ...
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offsetof(struct user32, u_debugreg[7]):
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regno -= offsetof(struct user32, u_debugreg[0]);
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return ptrace_set_debugreg(child, regno / 4, val);
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default:
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if (regno > sizeof(struct user32) || (regno & 3))
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return -EIO;
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/*
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* Other dummy fields in the virtual user structure
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* are ignored
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*/
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break;
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}
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return 0;
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}
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#undef R32
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#define R32(l,q) \
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case offsetof(struct user32, regs.l): \
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*val = regs->q; break
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static int getreg32(struct task_struct *child, unsigned regno, u32 *val)
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{
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struct pt_regs *regs = task_pt_regs(child);
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switch (regno) {
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case offsetof(struct user32, regs.fs):
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*val = child->thread.fsindex;
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if (child == current)
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asm("movl %%fs,%0" : "=r" (*val));
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break;
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case offsetof(struct user32, regs.gs):
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*val = child->thread.gsindex;
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if (child == current)
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asm("movl %%gs,%0" : "=r" (*val));
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break;
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case offsetof(struct user32, regs.ds):
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*val = child->thread.ds;
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if (child == current)
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asm("movl %%ds,%0" : "=r" (*val));
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break;
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case offsetof(struct user32, regs.es):
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*val = child->thread.es;
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if (child == current)
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asm("movl %%es,%0" : "=r" (*val));
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break;
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R32(cs, cs);
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R32(ss, ss);
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R32(ebx, bx);
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R32(ecx, cx);
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R32(edx, dx);
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R32(edi, di);
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R32(esi, si);
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R32(ebp, bp);
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R32(eax, ax);
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R32(orig_eax, orig_ax);
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R32(eip, ip);
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R32(esp, sp);
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case offsetof(struct user32, regs.eflags):
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/*
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* If the debugger set TF, hide it from the readout.
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*/
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*val = regs->flags;
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if (test_tsk_thread_flag(child, TIF_FORCED_TF))
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*val &= ~X86_EFLAGS_TF;
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break;
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case offsetof(struct user32, u_debugreg[0]) ...
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offsetof(struct user32, u_debugreg[7]):
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regno -= offsetof(struct user32, u_debugreg[0]);
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*val = ptrace_get_debugreg(child, regno / 4);
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break;
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default:
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if (regno > sizeof(struct user32) || (regno & 3))
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return -EIO;
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/*
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* Other dummy fields in the virtual user structure
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* are ignored
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*/
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*val = 0;
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break;
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}
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return 0;
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}
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#undef R32
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static long ptrace32_siginfo(unsigned request, u32 pid, u32 addr, u32 data)
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{
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siginfo_t __user *si = compat_alloc_user_space(sizeof(siginfo_t));
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compat_siginfo_t __user *si32 = compat_ptr(data);
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siginfo_t ssi;
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int ret;
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if (request == PTRACE_SETSIGINFO) {
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memset(&ssi, 0, sizeof(siginfo_t));
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ret = copy_siginfo_from_user32(&ssi, si32);
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if (ret)
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return ret;
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if (copy_to_user(si, &ssi, sizeof(siginfo_t)))
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return -EFAULT;
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}
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ret = sys_ptrace(request, pid, addr, (unsigned long)si);
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if (ret)
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return ret;
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if (request == PTRACE_GETSIGINFO) {
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if (copy_from_user(&ssi, si, sizeof(siginfo_t)))
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return -EFAULT;
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ret = copy_siginfo_to_user32(si32, &ssi);
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}
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return ret;
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}
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asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data)
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{
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struct task_struct *child;
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struct pt_regs *childregs;
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void __user *datap = compat_ptr(data);
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int ret;
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__u32 val;
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switch (request) {
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case PTRACE_TRACEME:
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case PTRACE_ATTACH:
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case PTRACE_KILL:
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case PTRACE_CONT:
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case PTRACE_SINGLESTEP:
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case PTRACE_SINGLEBLOCK:
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case PTRACE_DETACH:
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case PTRACE_SYSCALL:
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case PTRACE_OLDSETOPTIONS:
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case PTRACE_SETOPTIONS:
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case PTRACE_SET_THREAD_AREA:
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case PTRACE_GET_THREAD_AREA:
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return sys_ptrace(request, pid, addr, data);
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default:
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return -EINVAL;
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case PTRACE_PEEKTEXT:
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case PTRACE_PEEKDATA:
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case PTRACE_POKEDATA:
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case PTRACE_POKETEXT:
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case PTRACE_POKEUSR:
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case PTRACE_PEEKUSR:
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case PTRACE_GETREGS:
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case PTRACE_SETREGS:
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case PTRACE_SETFPREGS:
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case PTRACE_GETFPREGS:
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case PTRACE_SETFPXREGS:
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case PTRACE_GETFPXREGS:
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case PTRACE_GETEVENTMSG:
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break;
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case PTRACE_SETSIGINFO:
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case PTRACE_GETSIGINFO:
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return ptrace32_siginfo(request, pid, addr, data);
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}
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child = ptrace_get_task_struct(pid);
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if (IS_ERR(child))
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return PTR_ERR(child);
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ret = ptrace_check_attach(child, request == PTRACE_KILL);
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if (ret < 0)
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goto out;
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childregs = task_pt_regs(child);
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switch (request) {
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case PTRACE_PEEKDATA:
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case PTRACE_PEEKTEXT:
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ret = 0;
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if (access_process_vm(child, addr, &val, sizeof(u32), 0) !=
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sizeof(u32))
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ret = -EIO;
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else
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ret = put_user(val, (unsigned int __user *)datap);
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break;
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case PTRACE_POKEDATA:
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case PTRACE_POKETEXT:
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ret = 0;
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if (access_process_vm(child, addr, &data, sizeof(u32), 1) !=
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sizeof(u32))
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ret = -EIO;
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break;
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case PTRACE_PEEKUSR:
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ret = getreg32(child, addr, &val);
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if (ret == 0)
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ret = put_user(val, (__u32 __user *)datap);
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break;
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case PTRACE_POKEUSR:
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ret = putreg32(child, addr, data);
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break;
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case PTRACE_GETREGS: { /* Get all gp regs from the child. */
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int i;
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if (!access_ok(VERIFY_WRITE, datap, 16*4)) {
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ret = -EIO;
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break;
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}
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ret = 0;
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for (i = 0; i <= 16*4; i += sizeof(__u32)) {
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getreg32(child, i, &val);
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ret |= __put_user(val, (u32 __user *)datap);
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datap += sizeof(u32);
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}
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break;
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}
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case PTRACE_SETREGS: { /* Set all gp regs in the child. */
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unsigned long tmp;
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int i;
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if (!access_ok(VERIFY_READ, datap, 16*4)) {
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ret = -EIO;
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break;
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}
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ret = 0;
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for (i = 0; i <= 16*4; i += sizeof(u32)) {
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ret |= __get_user(tmp, (u32 __user *)datap);
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putreg32(child, i, tmp);
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datap += sizeof(u32);
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}
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break;
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}
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case PTRACE_GETFPREGS:
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ret = -EIO;
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if (!access_ok(VERIFY_READ, compat_ptr(data),
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sizeof(struct user_i387_struct)))
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break;
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save_i387_ia32(child, datap, childregs, 1);
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ret = 0;
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break;
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case PTRACE_SETFPREGS:
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ret = -EIO;
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if (!access_ok(VERIFY_WRITE, datap,
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sizeof(struct user_i387_struct)))
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break;
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ret = 0;
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/* don't check EFAULT to be bug-to-bug compatible to i386 */
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restore_i387_ia32(child, datap, 1);
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break;
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case PTRACE_GETFPXREGS: {
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struct user32_fxsr_struct __user *u = datap;
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init_fpu(child);
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ret = -EIO;
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if (!access_ok(VERIFY_WRITE, u, sizeof(*u)))
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break;
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ret = -EFAULT;
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if (__copy_to_user(u, &child->thread.i387.fxsave, sizeof(*u)))
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break;
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ret = __put_user(childregs->cs, &u->fcs);
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ret |= __put_user(child->thread.ds, &u->fos);
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break;
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}
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case PTRACE_SETFPXREGS: {
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struct user32_fxsr_struct __user *u = datap;
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unlazy_fpu(child);
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ret = -EIO;
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if (!access_ok(VERIFY_READ, u, sizeof(*u)))
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break;
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/*
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* no checking to be bug-to-bug compatible with i386.
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* but silence warning
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*/
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if (__copy_from_user(&child->thread.i387.fxsave, u, sizeof(*u)))
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;
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set_stopped_child_used_math(child);
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child->thread.i387.fxsave.mxcsr &= mxcsr_feature_mask;
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ret = 0;
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break;
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}
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case PTRACE_GETEVENTMSG:
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ret = put_user(child->ptrace_message,
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(unsigned int __user *)compat_ptr(data));
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break;
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default:
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BUG();
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}
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out:
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put_task_struct(child);
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return ret;
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}
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@ -1,470 +0,0 @@
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/* By Ross Biro 1/23/92 */
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/*
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* Pentium III FXSR, SSE support
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* Gareth Hughes <gareth@valinux.com>, May 2000
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*
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* x86-64 port 2000-2002 Andi Kleen
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/smp.h>
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#include <linux/errno.h>
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#include <linux/ptrace.h>
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#include <linux/user.h>
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#include <linux/security.h>
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#include <linux/audit.h>
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#include <linux/seccomp.h>
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#include <linux/signal.h>
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#include <asm/uaccess.h>
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#include <asm/pgtable.h>
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#include <asm/system.h>
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#include <asm/processor.h>
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#include <asm/prctl.h>
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#include <asm/i387.h>
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#include <asm/debugreg.h>
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#include <asm/ldt.h>
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#include <asm/desc.h>
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#include <asm/proto.h>
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#include <asm/ia32.h>
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/*
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* does not yet catch signals sent when the child dies.
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* in exit.c or in signal.c.
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*/
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|
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/*
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* Determines which flags the user has access to [1 = access, 0 = no access].
|
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* Prohibits changing ID(21), VIP(20), VIF(19), VM(17), IOPL(12-13), IF(9).
|
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* Also masks reserved bits (63-22, 15, 5, 3, 1).
|
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*/
|
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#define FLAG_MASK 0x54dd5UL
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/*
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* Called by kernel/ptrace.c when detaching..
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*
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* Make sure the single step bit is not set.
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*/
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void ptrace_disable(struct task_struct *child)
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{
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user_disable_single_step(child);
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}
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static unsigned long *pt_regs_access(struct pt_regs *regs, unsigned long offset)
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{
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BUILD_BUG_ON(offsetof(struct pt_regs, r15) != 0);
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return ®s->r15 + (offset / sizeof(regs->r15));
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}
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static int putreg(struct task_struct *child,
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unsigned long regno, unsigned long value)
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{
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struct pt_regs *regs = task_pt_regs(child);
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switch (regno) {
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case offsetof(struct user_regs_struct,fs):
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if (value && (value & 3) != 3)
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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);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user