gipu/vm/vmas.cpp
Giulio De Pasquale 1490a6e6fc ISA completo
2017-05-18 17:28:10 +02:00

88 lines
2.0 KiB
C++

#include "vmas.h"
#include "debug.h"
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
VMAddrSpace::VMAddrSpace() {
stack = NULL;
code = NULL;
data = NULL;
stacksize = DEFAULT_STACKSIZE;
codesize = DEFAULT_CODESIZE;
datasize = DEFAULT_DATASIZE;
return;
}
VMAddrSpace::VMAddrSpace(uint32_t ss, uint32_t cs, uint32_t ds) {
stack = NULL;
code = NULL;
data = NULL;
stacksize = ss;
codesize = cs;
datasize = ds;
return;
}
bool VMAddrSpace::allocate(void) {
DBG_INFO(("Allocating sections...\n"));
DBG_INFO(("\tcode...\n"));
code = new uint8_t[codesize];
DBG_INFO(("\tdata...\n"));
data = new uint8_t[datasize];
DBG_INFO(("\tstack...\n"));
stack = new uint8_t[stacksize];
if (code == NULL) {
DBG_ERROR(("Couldn't allocate code section.\n"));
return false;
}
if (data == NULL) {
DBG_ERROR(("Couldn't allocate data section.\n"));
return false;
}
if (stack == NULL) {
DBG_ERROR(("Couldn't allocate stack section.\n"));
return false;
}
memset(code, 0xff, codesize); // auto halt in case the assembly is not correct
memset(stack, 0x0, stacksize);
memset(data, 0x0, datasize);
DBG_SUCC(("Done!\n"));
return true;
}
bool VMAddrSpace::insCode(uint8_t *buf, uint8_t size) {
if (code) {
DBG_INFO(("Copying buffer into code section.\n"));
memcpy(code, buf, size);
} else {
DBG_ERROR(("Couldn't write into code section.\n"));
return false;
}
return true;
}
bool VMAddrSpace::insStack(uint8_t *buf, uint8_t size) {
if (stack) {
DBG_INFO(("Copying buffer into stack section.\n"));
memcpy(stack, buf, size);
} else {
DBG_ERROR(("Couldn't write into stack section.\n"));
return false;
}
return true;
}
bool VMAddrSpace::insData(uint8_t *buf, uint8_t size) {
if (this->code) {
DBG_INFO(("Copying buffer into data section.\n"));
memcpy(data, buf, size);
} else {
DBG_ERROR(("Couldn't write into data section.\n"));
return false;
}
return true;
}