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le.c
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le.c
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/*
This program and the accompanying materials are
made available under the terms of the Eclipse Public License v2.0 which accompanies
this distribution, and is available at https://www.eclipse.org/legal/epl-v20.html
SPDX-License-Identifier: EPL-2.0
Copyright Contributors to the Zowe Project.
*/
#include "zowetypes.h"
#ifdef METTLE
#include <metal/metal.h>
#include <metal/stddef.h>
#include <metal/stdio.h>
#include <metal/stdlib.h>
#include <metal/string.h>
#include <metal/stdarg.h>
#include "metalio.h"
#include "qsam.h"
#else
#include <stdio.h>
#ifdef __ZOWE_OS_ZOS
#include <ctest.h>
#include <dynit.h>
#endif
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <stdarg.h>
#include <sys/stat.h>
#include <unistd.h>
#endif
#include "copyright.h"
#include "utils.h"
#include "collections.h"
#include "alloc.h"
#include "le.h"
#ifdef __ZOWE_OS_ZOS
#include "zos.h"
#endif
#ifdef __ZOWE_OS_ZOS
LibraryFunction libraryFunctionTable[LIBRARY_FUNCTION_COUNT]
={
#ifndef METTLE
{ "atof", (void*)atof, NULL, NULL},
{ "atoi", (void*)atoi, NULL, NULL},
{ "bsearch", (void*)bsearch, NULL, NULL},
{ "chmod", (void*)chmod, NULL, NULL},
{ "chown", (void*)chown, NULL, NULL},
{ "dynalloc",(void*)dynalloc, NULL, NULL},
{ "fclose", (void*)fclose, NULL, NULL},
{ "feof", (void*)feof, NULL, NULL},
{ "fgetc", (void*)fgetc, NULL, NULL},
{ "fgets", (void*)fgets, NULL, NULL},
{ "fopen", (void*)fopen, NULL, NULL},
{ "fprintf", (void*)fprintf, NULL, NULL},
{ "fread", (void*)fread, NULL, NULL},
{ "fseek", (void*)fseek, NULL, NULL},
{ "fwrite", (void*)fwrite, NULL, NULL},
{ "malloc", (void*)malloc, NULL, NULL},
{ "memchr", (void*)memchr, NULL, NULL},
{ "memcmp", (void*)memcmp, NULL, NULL},
{ "memcpy", (void*)memcpy, SRBCLEAN, SRBCLEAN },
{ "memmove", (void*)memmove, NULL, NULL},
{ "memset", (void*)memset, SRBCLEAN, SRBCLEAN },
{ "printf", (void*)printf, NULL, NULL},
{ "qsort", (void*)qsort, NULL, NULL},
{ "strcmp", (void*)strcmp, NULL, NULL},
{ "strcpy", (void*)strcpy, NULL, NULL},
{ "strlen", (void*)strlen, SRBCLEAN, SRBCLEAN },
{ "strspn", (void*)strspn, NULL, NULL},
{ "strstr", (void*)strstr, NULL, NULL},
{ "strtok", (void*)strtok, NULL, NULL},
{ "strtol", (void*)strtol, NULL, NULL},
{ "tan", (void*)tan, NULL, NULL},
#endif
};
char *getCAA(){
char *realCAA = NULL;
#if !defined(METTLE) && defined(_LP64)
char *laa = *(char * __ptr32 * __ptr32)0x04B8;
char *lca = *(char **)(laa + 88);
realCAA = *(char **)(lca + 8);
#else
__asm(
ASM_PREFIX
" LA %0,0(,12) \n"
: "=r"(realCAA)
:
:
);
#endif
return realCAA;
}
#ifndef LE_MAX_SUPPORTED_ZOS
#define LE_MAX_SUPPORTED_ZOS 0x01020500u
#endif
void abortIfUnsupportedCAA() {
#ifdef __ZOWE_OS_ZOS
ECVT *ecvt = getECVT();
unsigned int zosVersion = ecvt->ecvtpseq;
#ifndef METTLE
if (zosVersion > LE_MAX_SUPPORTED_ZOS) {
printf("error: z/OS version = 0x%08X, max supported version = 0x%08X - "
"CAA fields require verification\n", zosVersion, LE_MAX_SUPPORTED_ZOS);
abort();
}
#else
/* Metal uses its own copy of CAA, reserved fields will always be available */
#endif /* METTLE */
#endif /* __ZOWE_OS_ZOS */
}
char *makeFakeCAA(char *stackArea, int stackSize){
char *fakeCAA = safeMalloc(CAA_SIZE,"Fake CAA");
char *realCAA = getCAA();
/* includes run time library and other stuff */
int copyStart = 0x1F0;
int copyEnd = 0x220;
void **runtimeLibraryTable = ((CAA*)realCAA)->runtimeLibraryVectorTable;
void *mallocCode = runtimeLibraryTable[0x1EC/4];
memset(fakeCAA,0,CAA_SIZE);
memcpy(fakeCAA+copyStart,realCAA+copyStart,copyEnd-copyStart);
/* move the top of stack indicator */
*((int*)(fakeCAA+0x314)) = (int)(stackArea + stackSize);
return fakeCAA;
}
static LibraryFunction *findLibraryFunction(int rtlVectorOffset){
for (int i=0; i<LIBRARY_FUNCTION_COUNT; i++){
LibraryFunction *function = &libraryFunctionTable[i];
int *intArray = (int*)function->pointer;
int offset = 0xFFFFFFFF;
if ((intArray[0] == 0x58F0C210) &&
((intArray[1]&0xFFFFF000) == 0x58F0F000) &&
(intArray[2] == 0x07FF0000)){
offset = 0xfff & intArray[1];
if (offset == rtlVectorOffset){
return function;
}
}
}
return NULL;
}
#define ESTIMATED_RTL_VECTOR_SIZE 0xB00
void showRTL(){
CAA *caa = (CAA*)getCAA();
void **rtlVector = caa->runtimeLibraryVectorTable;
printf("RTL Vector at 0x%x\n",rtlVector);
dumpbuffer((char*)rtlVector,ESTIMATED_RTL_VECTOR_SIZE);
int estimatedEntries = ESTIMATED_RTL_VECTOR_SIZE / 4;
for (int i=2; i<estimatedEntries; i++){
char *stub = rtlVector[i];
printf("i = %d offset=0x%03x at 0x%x\n",i,i*sizeof(int),stub);
dumpbuffer(stub,0x40);
int offset = i * 4;
LibraryFunction *function = findLibraryFunction(offset);
if (function){
printf("FOUND %s\n",function->name);
}
}
}
#endif /* __ZOWE_OS_ZOS */
RLEAnchor *makeRLEAnchor(){
RLEAnchor *anchor = (RLEAnchor*)safeMalloc31(sizeof(RLEAnchor),"RLEAnchor");
memset(anchor,0,sizeof(RLEAnchor));
memcpy(anchor->eyecatcher,"RLEANCHR",8);
#ifdef __ZOWE_OS_ZOS
/* non METTLE/METAL assumuption here */
#ifdef _LP64
anchor->flags = RLE_RTL_64 | RLE_RTL_XPLINK;
#else
anchor->flags = 0;
#endif
#ifdef METTLE
CAA *caa = (CAA*)safeMalloc31(sizeof(CAA),"METTLE CAA");
anchor->mainTaskCAA = caa;
anchor->masterRTLVector = NULL; /* we don't have one of these, yet */
#else
CAA *caa = (CAA*)getCAA();
anchor->mainTaskCAA = caa;
anchor->masterRTLVector = caa->runtimeLibraryVectorTable;
#endif
#endif /* __ZOWE_OS_ZOS */
return anchor;
}
void deleteRLEAnchor(RLEAnchor *anchor) {
#ifdef METTLE
safeFree31((char *)anchor->mainTaskCAA, sizeof(CAA));
anchor->mainTaskCAA = NULL;
#endif
safeFree31((char *)anchor, sizeof(RLEAnchor));
anchor = NULL;
}
#ifndef METTLE
void establishGlobalEnvironment(RLEAnchor *anchor){
/* do nothing */
}
void returnGlobalEnvironment(void){
/* do nothing */
}
#endif
#ifndef __ZOWE_OS_ZOS /* The z/OS implementation is in scheduling.c */
RLETask *makeRLETask(RLEAnchor *anchor,
int taskFlags,
int functionPointer(RLETask *task)){
RLETask *task = (RLETask*)safeMalloc31(sizeof(RLETask),"RTSK");
memset(task,0,sizeof(RLETask));
memcpy(task->eyecatcher,"RTSK",4);
task->flags = taskFlags;
task->anchor = anchor;
return task;
}
void deleteRLETask(RLETask *task) {
safeFree31((char *)task, sizeof(RLETask));
task = NULL;
}
#endif
#ifdef __ZOWE_OS_ZOS
void initRLEEnvironment(RLEAnchor *anchor) {
establishGlobalEnvironment(anchor);
RLETask *task = makeRLETask(anchor, 0, NULL);
returnGlobalEnvironment();
abortIfUnsupportedCAA();
CAA *caa = (CAA *)getCAA();
caa->rleTask = task;
int recoveryRC = recoveryEstablishRouter(RCVR_ROUTER_FLAG_NONE);
if (recoveryRC != RC_RCV_OK) {
printf("le.c: error - recovery router not established\n");
}
}
void termRLEEnvironment() {
recoveryRemoveRouter();
CAA *caa = (CAA *)getCAA();
deleteRLETask(caa->rleTask);
}
#endif
/*
This program and the accompanying materials are
made available under the terms of the Eclipse Public License v2.0 which accompanies
this distribution, and is available at https://www.eclipse.org/legal/epl-v20.html
SPDX-License-Identifier: EPL-2.0
Copyright Contributors to the Zowe Project.
*/