88 lines
2.0 KiB
C++
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;
|
|
} |