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No linear addresses in message delivery

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- removes p_delivermsg_lin item from the process structure and code
  related to it

- as the send part, the receive does not need to use the
  PHYS_COPY_CATCH() and umap_local() couple.  

- The address space of the target process is installed before
  delivermsg() is called.

- unlike the linear address, the virtual address does not change when
  paging is turned on nor after fork().
This commit is contained in:
Tomas Hruby
2010-06-11 08:16:10 +00:00
parent 1bf6d23f34
commit 360de619c0
7 changed files with 17 additions and 45 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
kernel/proc.c
View File

@@ -159,13 +159,7 @@ check_misc_flags:
else if (proc_ptr->p_misc_flags & MF_DELIVERMSG) {
TRACE(VF_SCHEDULING, printf("delivering to %s / %d\n",
proc_ptr->p_name, proc_ptr->p_endpoint););
if(delivermsg(proc_ptr) == VMSUSPEND) {
TRACE(VF_SCHEDULING,
printf("suspending %s / %d\n",
proc_ptr->p_name,
proc_ptr->p_endpoint););
assert(!proc_is_runnable(proc_ptr));
}
delivermsg(proc_ptr);
}
else if (proc_ptr->p_misc_flags & MF_SC_DEFER) {
/* Perform the system call that we deferred earlier. */
@@ -605,12 +599,10 @@ PUBLIC int mini_send(
/*===========================================================================*
* mini_receive *
*===========================================================================*/
PRIVATE int mini_receive(
register struct proc *caller_ptr, /* process trying to get message */
endpoint_t src_e, /* which message source is wanted */
message *m_ptr, /* pointer to message buffer */
const int flags
)
PRIVATE int mini_receive(struct proc * caller_ptr,
int src_e, /* which message source is wanted */
message * m_buff_usr, /* pointer to message buffer */
const int flags)
{
/* A process or task wants to get a message. If a message is already queued,
* acquire it and deblock the sender. If no message from the desired source
@@ -620,18 +612,11 @@ PRIVATE int mini_receive(
sys_map_t *map;
bitchunk_t *chunk;
int i, r, src_id, src_proc_nr, src_p;
phys_bytes linaddr;
assert(!(caller_ptr->p_misc_flags & MF_DELIVERMSG));
if(!(linaddr = umap_local(caller_ptr, D, (vir_bytes) m_ptr,
sizeof(message)))) {
return EFAULT;
}
/* This is where we want our message. */
caller_ptr->p_delivermsg_lin = linaddr;
caller_ptr->p_delivermsg_vir = (vir_bytes) m_ptr;
caller_ptr->p_delivermsg_vir = (vir_bytes) m_buff_usr;
if(src_e == ANY) src_p = ANY;
else