Zap 'ptrace(PT_READ_U, ...)' and 'ptrace(PT_WRITE_U, ...)' since they

are a really nasty interface that should have been killed long ago
when 'ptrace(PT_[SG]ETREGS' etc came along.  The entity that they
operate on (struct user) will not be around much longer since it
is part-per-process and part-per-thread in a post-KSE world.

gdb does not actually use this except for the obscure 'info udot'
command which does a hexdump of as much of the child's 'struct user'
as it can get.  It carries its own #defines so it doesn't break
compiles.

2 files changed, 0 insertions, 58 deletions

diff --git a/sys/ia64/ia64/machdep.c b/sys/ia64/ia64/machdep.c
index 1bf4a78..f915782 100644
--- a/sys/ia64/ia64/machdep.c
+++ b/sys/ia64/ia64/machdep.c
@@ -1084,59 +1084,6 @@ ptrace_single_step(struct proc *p)
 	return 0;
 }
 
-int ptrace_read_u_check(struct proc *p, vm_offset_t addr, size_t len)
-{
-	vm_offset_t gap;
-
-	if ((vm_offset_t) (addr + len) < addr)
-		return EPERM;
-	if ((vm_offset_t) (addr + len) <= sizeof(struct user))
-		return 0;
-
-	gap = (char *) p->p_frame - (char *) p->p_addr;
-	
-	if ((vm_offset_t) addr < gap)
-		return EPERM;
-	if ((vm_offset_t) (addr + len) <= 
-	    (vm_offset_t) (gap + sizeof(struct trapframe)))
-		return 0;
-	return EPERM;
-}
-
-int
-ptrace_write_u(struct proc *p, vm_offset_t off, long data)
-{
-	vm_offset_t min;
-#if 0
-	struct trapframe frame_copy;
-	struct trapframe *tp;
-#endif
-
-	/*
-	 * Privileged kernel state is scattered all over the user area.
-	 * Only allow write access to parts of regs and to fpregs.
-	 */
-	min = (char *)p->p_frame - (char *)p->p_addr;
-	if (off >= min && off <= min + sizeof(struct trapframe) - sizeof(int)) {
-#if 0
-		tp = p->p_frame;
-		frame_copy = *tp;
-		*(int *)((char *)&frame_copy + (off - min)) = data;
-		if (!EFLAGS_SECURE(frame_copy.tf_eflags, tp->tf_eflags) ||
-		    !CS_SECURE(frame_copy.tf_cs))
-			return (EINVAL);
-#endif
-		*(int*)((char *)p->p_addr + off) = data;
-		return (0);
-	}
-	min = offsetof(struct user, u_pcb);
-	if (off >= min && off <= min + sizeof(struct pcb)) {
-		*(int*)((char *)p->p_addr + off) = data;
-		return (0);
-	}
-	return (EFAULT);
-}
-
 int
 ia64_pa_access(vm_offset_t pa)
 {
diff --git a/sys/ia64/include/ptrace.h b/sys/ia64/include/ptrace.h
index 8a7ff84..2cf8f26 100644
--- a/sys/ia64/include/ptrace.h
+++ b/sys/ia64/include/ptrace.h
@@ -45,9 +45,4 @@
 #define PT_GETFPREGS    (PT_FIRSTMACH + 3)
 #define PT_SETFPREGS    (PT_FIRSTMACH + 4)
 
-#ifdef _KERNEL
-int	ptrace_read_u_check __P((struct proc *p, vm_offset_t off, size_t len));
 #endif
-
-#endif
-