diff options
Diffstat (limited to 'sys/fs/procfs/procfs_mem.c')
| -rw-r--r-- | sys/fs/procfs/procfs_mem.c | 49 |
1 files changed, 34 insertions, 15 deletions
diff --git a/sys/fs/procfs/procfs_mem.c b/sys/fs/procfs/procfs_mem.c index f772c4b..04b3a37 100644 --- a/sys/fs/procfs/procfs_mem.c +++ b/sys/fs/procfs/procfs_mem.c @@ -37,7 +37,7 @@ * * @(#)procfs_mem.c 8.4 (Berkeley) 1/21/94 * - * $Id: procfs_mem.c,v 1.15 1996/01/19 03:58:32 dyson Exp $ + * $Id: procfs_mem.c,v 1.16 1996/01/24 18:41:06 peter Exp $ */ /* @@ -96,20 +96,6 @@ procfs_rwmem(p, uio) int fix_prot; uva = (vm_offset_t) uio->uio_offset; - if (uva >= VM_MAXUSER_ADDRESS) { - - if (writing || (uva >= (VM_MAXUSER_ADDRESS + UPAGES * PAGE_SIZE))) { - error = 0; - break; - } - /* we are reading the "U area", fill it in */ - PHOLD(p); - if (p->p_flag & P_INMEM) { - p->p_addr->u_kproc.kp_proc = *p; - fill_eproc (p, &p->p_addr->u_kproc.kp_eproc); - } - PRELE(p); - } /* * Get the page number of this segment. @@ -122,6 +108,39 @@ procfs_rwmem(p, uio) */ len = min(PAGE_SIZE - page_offset, uio->uio_resid); + if (uva >= VM_MAXUSER_ADDRESS) { + if (writing || (uva >= (VM_MAXUSER_ADDRESS + UPAGES * PAGE_SIZE))) { + error = 0; + break; + } + + /* we are reading the "U area", force it into core */ + PHOLD(p); + + /* sanity check */ + if (!(p->p_flag & P_INMEM)) { + /* aiee! */ + error = EFAULT; + break; + } + + /* populate the ptrace/procfs area */ + p->p_addr->u_kproc.kp_proc = *p; + fill_eproc (p, &p->p_addr->u_kproc.kp_eproc); + + /* locate the in-core address */ + kva = (u_int)p->p_addr + uva - VM_MAXUSER_ADDRESS; + + /* transfer it */ + error = uiomove((caddr_t)kva, len, uio); + + /* let the pages go */ + PRELE(p); + + continue; + } + + /* * The map we want... */ |
