mirror/freebsd
1
0
Fork 0
mirror of https://git.FreeBSD.org/src.git synced 2024-12-05 09:14:03 +00:00
Code Issues Releases Activity

Don't attempt to read process context from the kernel when (the

Browse Source 
kernel's) curproc is null.  This fixes endless recursion in
xfer_umem() for attempts to read from user addresses, in particular
for attempts to read %fs and %gs from the pcb for `info reg'.
This commit is contained in:
Bruce Evans 1998-05-12 16:49:13 +00:00
parent 12e553e059
commit e7c80443b4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=35972
3 changed files with 6 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
gnu/usr.bin/binutils/gdb/i386/kvm-fbsd.c
View File

@ -361,7 +361,7 @@ get_kcore_registers (regno)
struct user *uaddr;
/* find the pcb for the current process */
if (kvread (&cur_proc->p_addr, &uaddr))
if (cur_proc == NULL || kvread (&cur_proc->p_addr, &uaddr))
error ("cannot read u area ptr for proc at %#x", cur_proc);
if (read_pcb (core_kd, (CORE_ADDR)&uaddr->u_pcb) < 0)
error ("cannot read pcb at %#x", &uaddr->u_pcb);
@ -418,7 +418,7 @@ xfer_umem (memaddr, myaddr, len, write)
int n;
struct proc proc;
if (kvread (cur_proc, &proc))
if (cur_proc == NULL || kvread (cur_proc, &proc))
error ("cannot read proc at %#x", cur_proc);
n = kvm_uread (core_kd, &proc, memaddr, myaddr, len) ;

4
gnu/usr.bin/binutils/gdb/kvm-fbsd.c
View File

@ -361,7 +361,7 @@ get_kcore_registers (regno)
struct user *uaddr;
/* find the pcb for the current process */
if (kvread (&cur_proc->p_addr, &uaddr))
if (cur_proc == NULL || kvread (&cur_proc->p_addr, &uaddr))
error ("cannot read u area ptr for proc at %#x", cur_proc);
if (read_pcb (core_kd, (CORE_ADDR)&uaddr->u_pcb) < 0)
error ("cannot read pcb at %#x", &uaddr->u_pcb);
@ -418,7 +418,7 @@ xfer_umem (memaddr, myaddr, len, write)
int n;
struct proc proc;
if (kvread (cur_proc, &proc))
if (cur_proc == NULL || kvread (cur_proc, &proc))
error ("cannot read proc at %#x", cur_proc);
n = kvm_uread (core_kd, &proc, memaddr, myaddr, len) ;

4
gnu/usr.bin/gdb/gdb/kvm-fbsd.c
View File

@ -361,7 +361,7 @@ get_kcore_registers (regno)
struct user *uaddr;
/* find the pcb for the current process */
if (kvread (&cur_proc->p_addr, &uaddr))
if (cur_proc == NULL || kvread (&cur_proc->p_addr, &uaddr))
error ("cannot read u area ptr for proc at %#x", cur_proc);
if (read_pcb (core_kd, (CORE_ADDR)&uaddr->u_pcb) < 0)
error ("cannot read pcb at %#x", &uaddr->u_pcb);
@ -418,7 +418,7 @@ xfer_umem (memaddr, myaddr, len, write)
int n;
struct proc proc;
if (kvread (cur_proc, &proc))
if (cur_proc == NULL || kvread (cur_proc, &proc))
error ("cannot read proc at %#x", cur_proc);
n = kvm_uread (core_kd, &proc, memaddr, myaddr, len) ;