From b43099221e2af2dfca8100b3fdf59d89c122f9d9 Mon Sep 17 00:00:00 2001
From: Takamichi Horikawa <myon@myon98.net>
Date: Sun, 5 Dec 2021 13:20:53 +0900
Subject: Initial

---
 main.c | 91 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 main.c

(limited to 'main.c')

diff --git a/main.c b/main.c
new file mode 100644
index 0000000..112dc2e
--- /dev/null
+++ b/main.c
@@ -0,0 +1,91 @@
+#include <windows.h>
+#include <stdio.h>
+
+BOOL WINAPI VirtualCopy(LPVOID lpvDest, LPVOID lpvSrc, DWORD cbSize, DWORD fdwProtect);
+
+enum {
+  PAGESIZE = 0x10000,
+};
+
+static BOOL writefile(const void *p, unsigned size, const wchar_t *fname)
+{
+  FILE *f = 0;
+  const char *pb = p;
+  BOOL ret = FALSE;
+
+  f = _wfopen(fname, L"wb");
+  if (!f) {
+    wprintf(L"\nError: fopen failed! Aborting.\n");
+    goto cleanup;
+  }
+  while (size) {
+    const unsigned wsize = (size < PAGESIZE) ? size : PAGESIZE;
+    if (fwrite(pb, 1, wsize, f) != wsize) {
+      wprintf(L"\nError: fwrite failed! Aborting.\n");
+      goto cleanup;
+    }
+    wprintf(L".");
+    fflush(stdout);
+    pb += wsize;
+    size -= wsize;
+  }
+  ret = TRUE;
+cleanup:
+  if (f) fclose(f);
+  return ret;
+}
+
+
+struct data {
+  unsigned addr;
+  unsigned size;
+  const wchar_t *name;
+};
+
+const struct data roms[] = {
+  {0x00000000, 0x02000000, L"rom.dat"},  // 0x0000_0000 - 0x01ff_ffff
+  {0x0c000000, 0x00400000, L"flash.dat"}, // 0x0c00_0000 - 0x0c3f_ffff
+  {0, 0, 0},
+};
+
+int wmain(int argc, wchar_t **argv)
+{
+  wchar_t fname[MAX_PATH];
+  wchar_t *pathend;
+  const struct data *i;
+
+  if (!GetModuleFileName(0, fname, MAX_PATH)) {
+    wprintf(L"Error: Cannot get executable file path! Aborting.\n");
+    goto end;
+  }
+  pathend = wcsrchr(fname, L'\\');
+  if (!pathend) {
+    wprintf(L"Error: Cannot get directory to write rom files! Aborting\n");
+    goto end;
+  }
+  for (i = roms; i->name; i++) {
+    void *p;
+
+    /* too lazy to check string length */
+    pathend[1] = 0;
+    wcscat(fname, i->name);
+    wprintf(L"Dumping %ls", fname);
+    fflush(stdout);
+    p = VirtualAlloc(0, i->size, MEM_RESERVE, PAGE_NOACCESS);
+    if (!p) {
+      wprintf(L"\nError: VirtualAlloc failed! Aborting.\n");
+      goto end;
+    }
+    if (!VirtualCopy(p, (void *)(i->addr >> 8), i->size, PAGE_READONLY | PAGE_PHYSICAL)) {
+      wprintf(L"\nError: VirtualCopy failed! Aborting.\n");
+      goto end;
+    }
+    if (!writefile(p, i->size, fname)) return 1;
+    wprintf(L"OK!\n");
+  }
+end:
+  wprintf(L"Press enter to continue...\n");
+  getwchar();
+  return 0;
+}
+
-- 
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