V1.0

games/rac1/host/src/main.c

@@ -0,0 +1,93 @@
+/* RAC1 Wrapper: runs the decompiled Ratchet & Clank (PAL, SCES_509.16) natively.
+ * usage: rac1_wrapper [SCES_509.16 or -] [disc.iso]   (the executable is read from the disc by default)
+ * Both come from the user's own disc; nothing from them is in this project. */
+#include "uya_runtime.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* The disc image: the second argument, RAC1_ISO, or `iso=PATH` in
+ * rac1_wrapper.cfg next to the program. */
+static const char *cfg_value(const char *key)
+{
+    static char line[4][1024];
+    static int k;
+    char p[1100];
+    snprintf(p, sizeof p, "%s/rac1_wrapper.cfg", plat_exe_dir());
+    FILE *f = fopen(p, "r");
+    if (!f) return 0;
+    char *b = line[k++ & 3];
+    size_t kl = strlen(key);
+    while (fgets(b, sizeof line[0], f)) {
+        b[strcspn(b, "\r\n")] = 0;
+        if (!strncmp(b, key, kl) && b[kl] == '=') { fclose(f); return b + kl + 1; }
+    }
+    fclose(f);
+    return 0;
+}
+
+static const char *find_iso(int argc, char **argv)
+{
+    if (argc > 2) return argv[2];
+    if (getenv("RAC1_ISO")) return getenv("RAC1_ISO");
+    const char *v = cfg_value("iso");
+    if (v) return v;
+    uya_log("no disc image: put `iso=C:\\path\\to\\Ratchet & Clank (Europe).iso` in %s/rac1_wrapper.cfg", plat_exe_dir());
+    return 0;
+}
+
+/* SCES_509.16: read from the disc image itself (`disc:`), unless the first
+ * argument or `elf=` in the cfg names a file. */
+static const char *find_elf(int argc, char **argv)
+{
+    if (argc > 1 && strcmp(argv[1], "-")) return argv[1];
+    const char *v = cfg_value("elf");
+    if (v) return v;
+    return "disc:SCES_509.16";
+}
+
+/* Sections of the executable: everything but code. .vutext is VU microcode
+ * (data the game uploads by DMA). */
+static const char *const exe_sections[] = {
+    ".vutext", "core.data", "core.rdata", "core.bss", "core.lit",
+    ".lit", ".bss", ".data", "lvl.vtbl", "lvl.camvtbl", "lvl.sndvtbl", 0
+};
+
+void rac1_boot(void);
+void rac1_run(void);
+
+int uya_main(int argc, char **argv)
+{
+    setvbuf(stdout, 0, _IONBF, 0);
+    atexit(plat_at_exit);
+    uya_log_open();
+    {   /* renderer=gl|soft in the cfg (UYA_RENDERER overrides it) */
+        extern const char *uya_renderer_cfg;
+        const char *r = cfg_value("renderer");
+        uya_renderer_cfg = r ? strdup(r) : 0;
+    }
+    const char *elf = find_elf(argc, argv);
+    if (plat_map_fixed(PS2_RAM_LO, PS2_RAM_HI - PS2_RAM_LO, 1) ||
+        plat_map_fixed(PS2_SPR, PS2_SPR_SIZE, 0) ||
+        plat_map_fixed(PS2_EE_REGS, PS2_EE_REGS_SZ, 0) ||
+        plat_map_fixed(PS2_VU_MEM, PS2_VU_MEM_SZ, 0) ||
+        plat_map_fixed(PS2_GS_PRIV, PS2_GS_PRIV_SZ, 0)) {
+        uya_log("the PS2 address space could not be mapped");
+        return 1;
+    }
+    plat_install_trap_handler();
+    {
+        const char *iso = find_iso(argc, argv);
+        if (!iso || uya_disc_open(iso) != 0) { uya_log("the disc image could not be opened"); return 1; }
+        uya_log("disc image: %s", iso);
+    }
+    if (uya_load_elf_sections(elf, exe_sections) <= 0) return 1;
+    /* code: every byte traps until a trampoline covers it */
+    uya_fill_code_traps(0x00112380, 0x0012F580);   /* core.text */
+    uya_fill_code_traps(0x001E9080, 0x0023E740);   /* .text (the game program) */
+    uya_install_trampolines();
+    atexit(uya_report);
+    rac1_boot();
+    rac1_run();
+    return 0;
+}