build & link with luajit instead of lua5.1

1 files changed, 459 insertions, 0 deletions

diff --git a/libs/luajit-cmake/luajit/src/host/buildvm_lib.c b/libs/luajit-cmake/luajit/src/host/buildvm_lib.c
new file mode 100644
index 0000000..b125ea1
--- /dev/null
+++ b/libs/luajit-cmake/luajit/src/host/buildvm_lib.c
@@ -0,0 +1,459 @@
+/*
+** LuaJIT VM builder: library definition compiler.
+** Copyright (C) 2005-2022 Mike Pall. See Copyright Notice in luajit.h
+*/
+
+#include "buildvm.h"
+#include "lj_obj.h"
+#include "lj_bc.h"
+#include "lj_lib.h"
+#include "buildvm_libbc.h"
+
+/* Context for library definitions. */
+static uint8_t obuf[8192];
+static uint8_t *optr;
+static char modname[80];
+static size_t modnamelen;
+static char funcname[80];
+static int modstate, regfunc;
+static int ffid, recffid, ffasmfunc;
+
+enum {
+  REGFUNC_OK,
+  REGFUNC_NOREG,
+  REGFUNC_NOREGUV
+};
+
+static void libdef_name(const char *p, int kind)
+{
+  size_t n = strlen(p);
+  if (kind != LIBINIT_STRING) {
+    if (n > modnamelen && p[modnamelen] == '_' &&
+	!strncmp(p, modname, modnamelen)) {
+      p += modnamelen+1;
+      n -= modnamelen+1;
+    }
+  }
+  if (n > LIBINIT_MAXSTR) {
+    fprintf(stderr, "Error: string too long: '%s'\n",  p);
+    exit(1);
+  }
+  if (optr+1+n+2 > obuf+sizeof(obuf)) {  /* +2 for caller. */
+    fprintf(stderr, "Error: output buffer overflow\n");
+    exit(1);
+  }
+  *optr++ = (uint8_t)(n | kind);
+  memcpy(optr, p, n);
+  optr += n;
+}
+
+static void libdef_endmodule(BuildCtx *ctx)
+{
+  if (modstate != 0) {
+    char line[80];
+    const uint8_t *p;
+    int n;
+    if (modstate == 1)
+      fprintf(ctx->fp, "  (lua_CFunction)0");
+    fprintf(ctx->fp, "\n};\n");
+    fprintf(ctx->fp, "static const uint8_t %s%s[] = {\n",
+	    LABEL_PREFIX_LIBINIT, modname);
+    line[0] = '\0';
+    for (n = 0, p = obuf; p < optr; p++) {
+      n += sprintf(line+n, "%d,", *p);
+      if (n >= 75) {
+	fprintf(ctx->fp, "%s\n", line);
+	n = 0;
+	line[0] = '\0';
+      }
+    }
+    fprintf(ctx->fp, "%s%d\n};\n#endif\n\n", line, LIBINIT_END);
+  }
+}
+
+static void libdef_module(BuildCtx *ctx, char *p, int arg)
+{
+  UNUSED(arg);
+  if (ctx->mode == BUILD_libdef) {
+    libdef_endmodule(ctx);
+    optr = obuf;
+    *optr++ = (uint8_t)ffid;
+    *optr++ = (uint8_t)ffasmfunc;
+    *optr++ = 0;  /* Hash table size. */
+    modstate = 1;
+    fprintf(ctx->fp, "#ifdef %sMODULE_%s\n", LIBDEF_PREFIX, p);
+    fprintf(ctx->fp, "#undef %sMODULE_%s\n", LIBDEF_PREFIX, p);
+    fprintf(ctx->fp, "static const lua_CFunction %s%s[] = {\n",
+	    LABEL_PREFIX_LIBCF, p);
+  }
+  modnamelen = strlen(p);
+  if (modnamelen > sizeof(modname)-1) {
+    fprintf(stderr, "Error: module name too long: '%s'\n", p);
+    exit(1);
+  }
+  strcpy(modname, p);
+}
+
+static int find_ffofs(BuildCtx *ctx, const char *name)
+{
+  int i;
+  for (i = 0; i < ctx->nglob; i++) {
+    const char *gl = ctx->globnames[i];
+    if (gl[0] == 'f' && gl[1] == 'f' && gl[2] == '_' && !strcmp(gl+3, name)) {
+      return (int)((uint8_t *)ctx->glob[i] - ctx->code);
+    }
+  }
+  fprintf(stderr, "Error: undefined fast function %s%s\n",
+	  LABEL_PREFIX_FF, name);
+  exit(1);
+}
+
+static void libdef_func(BuildCtx *ctx, char *p, int arg)
+{
+  if (arg != LIBINIT_CF)
+    ffasmfunc++;
+  if (ctx->mode == BUILD_libdef) {
+    if (modstate == 0) {
+      fprintf(stderr, "Error: no module for function definition %s\n", p);
+      exit(1);
+    }
+    if (regfunc == REGFUNC_NOREG) {
+      if (optr+1 > obuf+sizeof(obuf)) {
+	fprintf(stderr, "Error: output buffer overflow\n");
+	exit(1);
+      }
+      *optr++ = LIBINIT_FFID;
+    } else {
+      if (arg != LIBINIT_ASM_) {
+	if (modstate != 1) fprintf(ctx->fp, ",\n");
+	modstate = 2;
+	fprintf(ctx->fp, "  %s%s", arg ? LABEL_PREFIX_FFH : LABEL_PREFIX_CF, p);
+      }
+      if (regfunc != REGFUNC_NOREGUV) obuf[2]++;  /* Bump hash table size. */
+      libdef_name(regfunc == REGFUNC_NOREGUV ? "" : p, arg);
+    }
+  } else if (ctx->mode == BUILD_ffdef) {
+    fprintf(ctx->fp, "FFDEF(%s)\n", p);
+  } else if (ctx->mode == BUILD_recdef) {
+    if (strlen(p) > sizeof(funcname)-1) {
+      fprintf(stderr, "Error: function name too long: '%s'\n", p);
+      exit(1);
+    }
+    strcpy(funcname, p);
+  } else if (ctx->mode == BUILD_vmdef) {
+    int i;
+    for (i = 1; p[i] && modname[i-1]; i++)
+      if (p[i] == '_') p[i] = '.';
+    fprintf(ctx->fp, "\"%s\",\n", p);
+  } else if (ctx->mode == BUILD_bcdef) {
+    if (arg != LIBINIT_CF)
+      fprintf(ctx->fp, ",\n%d", find_ffofs(ctx, p));
+  }
+  ffid++;
+  regfunc = REGFUNC_OK;
+}
+
+static uint8_t *libdef_uleb128(uint8_t *p, uint32_t *vv)
+{
+  uint32_t v = *p++;
+  if (v >= 0x80) {
+    int sh = 0; v &= 0x7f;
+    do { v |= ((*p & 0x7f) << (sh += 7)); } while (*p++ >= 0x80);
+  }
+  *vv = v;
+  return p;
+}
+
+static void libdef_fixupbc(uint8_t *p)
+{
+  uint32_t i, sizebc;
+  p += 4;
+  p = libdef_uleb128(p, &sizebc);
+  p = libdef_uleb128(p, &sizebc);
+  p = libdef_uleb128(p, &sizebc);
+  for (i = 0; i < sizebc; i++, p += 4) {
+    uint8_t op = p[libbc_endian ? 3 : 0];
+    uint8_t ra = p[libbc_endian ? 2 : 1];
+    uint8_t rc = p[libbc_endian ? 1 : 2];
+    uint8_t rb = p[libbc_endian ? 0 : 3];
+    if (!LJ_DUALNUM && op == BC_ISTYPE && rc == ~LJ_TNUMX+1) {
+      op = BC_ISNUM; rc++;
+    }
+    p[LJ_ENDIAN_SELECT(0, 3)] = op;
+    p[LJ_ENDIAN_SELECT(1, 2)] = ra;
+    p[LJ_ENDIAN_SELECT(2, 1)] = rc;
+    p[LJ_ENDIAN_SELECT(3, 0)] = rb;
+  }
+}
+
+static void libdef_lua(BuildCtx *ctx, char *p, int arg)
+{
+  UNUSED(arg);
+  if (ctx->mode == BUILD_libdef) {
+    int i;
+    for (i = 0; libbc_map[i].name != NULL; i++) {
+      if (!strcmp(libbc_map[i].name, p)) {
+	int ofs = libbc_map[i].ofs;
+	int len = libbc_map[i+1].ofs - ofs;
+	obuf[2]++;  /* Bump hash table size. */
+	*optr++ = LIBINIT_LUA;
+	libdef_name(p, 0);
+	memcpy(optr, libbc_code + ofs, len);
+	libdef_fixupbc(optr);
+	optr += len;
+	return;
+      }
+    }
+    fprintf(stderr, "Error: missing libbc definition for %s\n", p);
+    exit(1);
+  }
+}
+
+static uint32_t find_rec(char *name)
+{
+  char *p = (char *)obuf;
+  uint32_t n;
+  for (n = 2; *p; n++) {
+    if (strcmp(p, name) == 0)
+      return n;
+    p += strlen(p)+1;
+  }
+  if (p+strlen(name)+1 >= (char *)obuf+sizeof(obuf)) {
+    fprintf(stderr, "Error: output buffer overflow\n");
+    exit(1);
+  }
+  strcpy(p, name);
+  return n;
+}
+
+static void libdef_rec(BuildCtx *ctx, char *p, int arg)
+{
+  UNUSED(arg);
+  if (ctx->mode == BUILD_recdef) {
+    char *q;
+    uint32_t n;
+    for (; recffid+1 < ffid; recffid++)
+      fprintf(ctx->fp, ",\n0");
+    recffid = ffid;
+    if (*p == '.') p = funcname;
+    q = strchr(p, ' ');
+    if (q) *q++ = '\0';
+    n = find_rec(p);
+    if (q)
+      fprintf(ctx->fp, ",\n0x%02x00+(%s)", n, q);
+    else
+      fprintf(ctx->fp, ",\n0x%02x00", n);
+  }
+}
+
+static void memcpy_endian(void *dst, void *src, size_t n)
+{
+  union { uint8_t b; uint32_t u; } host_endian;
+  host_endian.u = 1;
+  if (host_endian.b == LJ_ENDIAN_SELECT(1, 0)) {
+    memcpy(dst, src, n);
+  } else {
+    size_t i;
+    for (i = 0; i < n; i++)
+      ((uint8_t *)dst)[i] = ((uint8_t *)src)[n-i-1];
+  }
+}
+
+static void libdef_push(BuildCtx *ctx, char *p, int arg)
+{
+  UNUSED(arg);
+  if (ctx->mode == BUILD_libdef) {
+    int len = (int)strlen(p);
+    if (*p == '"') {
+      if (len > 1 && p[len-1] == '"') {
+	p[len-1] = '\0';
+	libdef_name(p+1, LIBINIT_STRING);
+	return;
+      }
+    } else if (*p >= '0' && *p <= '9') {
+      char *ep;
+      double d = strtod(p, &ep);
+      if (*ep == '\0') {
+	if (optr+1+sizeof(double) > obuf+sizeof(obuf)) {
+	  fprintf(stderr, "Error: output buffer overflow\n");
+	  exit(1);
+	}
+	*optr++ = LIBINIT_NUMBER;
+	memcpy_endian(optr, &d, sizeof(double));
+	optr += sizeof(double);
+	return;
+      }
+    } else if (!strcmp(p, "lastcl")) {
+      if (optr+1 > obuf+sizeof(obuf)) {
+	fprintf(stderr, "Error: output buffer overflow\n");
+	exit(1);
+      }
+      *optr++ = LIBINIT_LASTCL;
+      return;
+    } else if (len > 4 && !strncmp(p, "top-", 4)) {
+      if (optr+2 > obuf+sizeof(obuf)) {
+	fprintf(stderr, "Error: output buffer overflow\n");
+	exit(1);
+      }
+      *optr++ = LIBINIT_COPY;
+      *optr++ = (uint8_t)atoi(p+4);
+      return;
+    }
+    fprintf(stderr, "Error: bad value for %sPUSH(%s)\n", LIBDEF_PREFIX, p);
+    exit(1);
+  }
+}
+
+static void libdef_set(BuildCtx *ctx, char *p, int arg)
+{
+  UNUSED(arg);
+  if (ctx->mode == BUILD_libdef) {
+    if (p[0] == '!' && p[1] == '\0') p[0] = '\0';  /* Set env. */
+    libdef_name(p, LIBINIT_STRING);
+    *optr++ = LIBINIT_SET;
+    obuf[2]++;  /* Bump hash table size. */
+  }
+}
+
+static void libdef_regfunc(BuildCtx *ctx, char *p, int arg)
+{
+  UNUSED(ctx); UNUSED(p);
+  regfunc = arg;
+}
+
+typedef void (*LibDefFunc)(BuildCtx *ctx, char *p, int arg);
+
+typedef struct LibDefHandler {
+  const char *suffix;
+  const char *stop;
+  const LibDefFunc func;
+  const int arg;
+} LibDefHandler;
+
+static const LibDefHandler libdef_handlers[] = {
+  { "MODULE_",	" \t\r\n",	libdef_module,		0 },
+  { "CF(",	")",		libdef_func,		LIBINIT_CF },
+  { "ASM(",	")",		libdef_func,		LIBINIT_ASM },
+  { "ASM_(",	")",		libdef_func,		LIBINIT_ASM_ },
+  { "LUA(",	")",		libdef_lua,		0 },
+  { "REC(",	")",		libdef_rec,		0 },
+  { "PUSH(",	")",		libdef_push,		0 },
+  { "SET(",	")",		libdef_set,		0 },
+  { "NOREGUV",	NULL,		libdef_regfunc,		REGFUNC_NOREGUV },
+  { "NOREG",	NULL,		libdef_regfunc,		REGFUNC_NOREG },
+  { NULL,	NULL,		(LibDefFunc)0,		0 }
+};
+
+/* Emit C source code for library function definitions. */
+void emit_lib(BuildCtx *ctx)
+{
+  const char *fname;
+
+  if (ctx->mode == BUILD_ffdef || ctx->mode == BUILD_libdef ||
+      ctx->mode == BUILD_recdef)
+    fprintf(ctx->fp, "/* This is a generated file. DO NOT EDIT! */\n\n");
+  else if (ctx->mode == BUILD_vmdef)
+    fprintf(ctx->fp, "ffnames = {\n[0]=\"Lua\",\n\"C\",\n");
+  if (ctx->mode == BUILD_recdef)
+    fprintf(ctx->fp, "static const uint16_t recff_idmap[] = {\n0,\n0x0100");
+  recffid = ffid = FF_C+1;
+  ffasmfunc = 0;
+
+  while ((fname = *ctx->args++)) {
+    char buf[256];  /* We don't care about analyzing lines longer than that. */
+    FILE *fp;
+    if (fname[0] == '-' && fname[1] == '\0') {
+      fp = stdin;
+    } else {
+      fp = fopen(fname, "r");
+      if (!fp) {
+	fprintf(stderr, "Error: cannot open input file '%s': %s\n",
+		fname, strerror(errno));
+	exit(1);
+      }
+    }
+    modstate = 0;
+    regfunc = REGFUNC_OK;
+    while (fgets(buf, sizeof(buf), fp) != NULL) {
+      char *p;
+      /* Simplistic pre-processor. Only handles top-level #if/#endif. */
+      if (buf[0] == '#' && buf[1] == 'i' && buf[2] == 'f') {
+	int ok = 1;
+	if (!strcmp(buf, "#if LJ_52\n"))
+	  ok = LJ_52;
+	else if (!strcmp(buf, "#if LJ_HASJIT\n"))
+	  ok = LJ_HASJIT;
+	else if (!strcmp(buf, "#if LJ_HASFFI\n"))
+	  ok = LJ_HASFFI;
+	else if (!strcmp(buf, "#if LJ_HASBUFFER\n"))
+	  ok = LJ_HASBUFFER;
+	if (!ok) {
+	  int lvl = 1;
+	  while (fgets(buf, sizeof(buf), fp) != NULL) {
+	    if (buf[0] == '#' && buf[1] == 'e' && buf[2] == 'n') {
+	      if (--lvl == 0) break;
+	    } else if (buf[0] == '#' && buf[1] == 'i' && buf[2] == 'f') {
+	      lvl++;
+	    }
+	  }
+	  continue;
+	}
+      }
+      for (p = buf; (p = strstr(p, LIBDEF_PREFIX)) != NULL; ) {
+	const LibDefHandler *ldh;
+	p += sizeof(LIBDEF_PREFIX)-1;
+	for (ldh = libdef_handlers; ldh->suffix != NULL; ldh++) {
+	  size_t n, len = strlen(ldh->suffix);
+	  if (!strncmp(p, ldh->suffix, len)) {
+	    p += len;
+	    n = ldh->stop ? strcspn(p, ldh->stop) : 0;
+	    if (!p[n]) break;
+	    p[n] = '\0';
+	    ldh->func(ctx, p, ldh->arg);
+	    p += n+1;
+	    break;
+	  }
+	}
+	if (ldh->suffix == NULL) {
+	  buf[strlen(buf)-1] = '\0';
+	  fprintf(stderr, "Error: unknown library definition tag %s%s\n",
+		  LIBDEF_PREFIX, p);
+	  exit(1);
+	}
+      }
+    }
+    fclose(fp);
+    if (ctx->mode == BUILD_libdef) {
+      libdef_endmodule(ctx);
+    }
+  }
+
+  if (ctx->mode == BUILD_ffdef) {
+    fprintf(ctx->fp, "\n#undef FFDEF\n\n");
+    fprintf(ctx->fp,
+      "#ifndef FF_NUM_ASMFUNC\n#define FF_NUM_ASMFUNC %d\n#endif\n\n",
+      ffasmfunc);
+  } else if (ctx->mode == BUILD_vmdef) {
+    fprintf(ctx->fp, "},\n\n");
+  } else if (ctx->mode == BUILD_bcdef) {
+    int i;
+    fprintf(ctx->fp, "\n};\n\n");
+    fprintf(ctx->fp, "LJ_DATADEF const uint16_t lj_bc_mode[] = {\n");
+    fprintf(ctx->fp, "BCDEF(BCMODE)\n");
+    for (i = ffasmfunc-1; i > 0; i--)
+      fprintf(ctx->fp, "BCMODE_FF,\n");
+    fprintf(ctx->fp, "BCMODE_FF\n};\n\n");
+  } else if (ctx->mode == BUILD_recdef) {
+    char *p = (char *)obuf;
+    fprintf(ctx->fp, "\n};\n\n");
+    fprintf(ctx->fp, "static const RecordFunc recff_func[] = {\n"
+	    "recff_nyi,\n"
+	    "recff_c");
+    while (*p) {
+      fprintf(ctx->fp, ",\nrecff_%s", p);
+      p += strlen(p)+1;
+    }
+    fprintf(ctx->fp, "\n};\n\n");
+  }
+}
+