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. removed const from putenv() for g++

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. added safecopies.c:
  these are library functions to maintain grant tables in own address space
. sys_safecopy.c:
  interfaces to kernel calls to perform safe copy functions in from or to
  foreign process
. changes in i/o fields (type merged with request) reflected in
  library functions (sys_out.c, sys_vinb.c, sys_vinl.c, sys_vinw.c,
  sys_voutb.c, sys_voutl.c, sys_voutw.c)
. type merged with request in sys_sdevio, also now accepts offset which
  is used when a grant is specified (the _DIO_SAFE subtype)
. system printf() function changed to send DIAGNOSTICS_S messages, which
  specify a grant id instead of a direct address for the buffer to be
  printed; tty and log can then safecopy the buffer
This commit is contained in:
Ben Gras
2006-06-20 08:45:04 +00:00
parent cfb984e9bd
commit 9df1183b94
14 changed files with 355 additions and 26 deletions
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lib/sysutil/kputc.c
+27 -4
View File
@@ -9,6 +9,8 @@
#include "sysutil.h"
static char print_buf[80]; /* output is buffered here */
/*===========================================================================*
* kputc *
*===========================================================================*/
@@ -17,21 +19,42 @@ int c;
{
/* Accumulate another character. If 0 or buffer full, print it. */
static int buf_count; /* # characters in the buffer */
static char print_buf[80]; /* output is buffered here */
message m;
if ((c == 0 && buf_count > 0) || buf_count == sizeof(print_buf)) {
#define PRINTPROCS (sizeof(procs)/sizeof(procs[0]))
int procs[] = OUTPUT_PROCS_ARRAY;
static int firstprint = 1;
static cp_grant_t printgrant_buffer[PRINTPROCS];
static cp_grant_id_t printgrants[PRINTPROCS];
int p;
if(firstprint) {
/* First time? Initialize grant table;
* Grant printing processes read copy access to our
* print buffer. (So buffer can't be on stack!)
*/
cpf_preallocate(printgrant_buffer, PRINTPROCS);
for(p = 0; procs[p] != NONE; p++) {
printgrants[p] = cpf_grant_direct(procs[p], print_buf,
sizeof(print_buf), CPF_READ);
}
firstprint = 0;
}
for(p = 0; procs[p] != NONE; p++) {
/* Send the buffer to this output driver. */
m.DIAG_BUF_COUNT = buf_count;
m.DIAG_PRINT_BUF = print_buf;
m.DIAG_ENDPT = SELF;
m.m_type = DIAGNOSTICS;
if(GRANT_VALID(printgrants[p])) {
m.m_type = DIAGNOSTICS_S;
m.DIAG_PRINT_BUF_G = printgrants[p];
} else {
m.m_type = DIAGNOSTICS;
m.DIAG_PRINT_BUF_G = print_buf;
}
(void) _sendrec(procs[p], &m);
}
buf_count = 0;
/* If the output fails, e.g., due to an ELOCKED, do not retry output