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kvisc/vm/pc/main.c
2019-06-05 12:53:09 +02:00

122 lines
2.2 KiB
C

// The OS/K Team licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#include <pc/arch.h>
#define FWPROGSIZE (1024 * 1024 * 1024)
static ssize_t fwsize;
static ushort *fwprog;
ushort bget(ctx_t *ctx)
{
if (rip % 2) {
_except(ctx, E_ALI, "Misaligned RIP register: 0x%016lX",
rip);
}
if (addr2real(rip) >= ctx->mz) {
_except(ctx, E_ACC, "Executing out of memory: 0x%016lX",
rip);
}
ushort c = ctx->mp[addr2real(rip)];
rip += 2;
return c;
}
ushort dget(ctx_t *ctx)
{
static int i = 0;
if (i >= fwsize) {
log("Finished disassembling\n");
fclose(ctx->disf);
exit(0);
}
rip += 2;
return fwprog[i++];
}
int main(int argc, char **argv)
{
ctx_t main_ctx;
FILE *fwfile;
main_ctx.r = arch_r;
main_ctx.i = arch_i;
if (argc < 2) {
log("Not enough arguments\n");
exit(-3);
}
fwprog = malloc(FWPROGSIZE);
fwfile = fopen(argv[1], "rb");
if (!fwprog) {
log("Couldn't allocate firmware buffer\n");
exit(-1);
}
if (!fwfile) {
log("Couldn't open program file\n");
exit(-2);
}
fwsize = fread(fwprog, 1, FWPROGSIZE, fwfile);
//log("Loaded %lu bytes
if (fwsize < 2) {
log("Program file too small or empty\n");
exit(-3);
}
if (!(argc > 2 && !strcmp(argv[2], "-d"))) {
main_ctx.mp = malloc(MEMSIZE + 16);
main_ctx.mz = MEMSIZE;
main_ctx.get = bget;
main_ctx.disf = NULL;
main_ctx.r[RIP].val = MEMOFF;
if (main_ctx.mp == 0) {
log("Couldn't allocate RAM\n");
exit(-1);
}
memcpy(&main_ctx.mp[addr2real(main_ctx.r[RIP].val)], fwprog, fwsize);
while (1) {
decode(&main_ctx);
}
}
// Disassembly
else {
main_ctx.disf = fopen("fwprog.dis", "w");
if (main_ctx.disf == NULL) {
log("Couldn't open fwprog.dis\n");
exit(-2);
}
main_ctx.mp = NULL;
main_ctx.mz = 0;
main_ctx.get = dget;
while (1) {
disasm(&main_ctx);
}
}
return 0;
}