Fix compatibility issues with Illumos.

Thanks to Theo Schlossnagle.

src/lj_alloc.c

@@ -188,21 +188,24 @@ static LJ_AINLINE void *CALL_MMAP(size_t size)
   return ptr;
 }
 
-#elif LJ_TARGET_OSX || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__)
+#elif LJ_TARGET_OSX || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) || defined(__sun__)
 
 /* OSX and FreeBSD mmap() use a naive first-fit linear search.
 ** That's perfect for us. Except that -pagezero_size must be set for OSX,
 ** otherwise the lower 4GB are blocked. And the 32GB RLIMIT_DATA needs
 ** to be reduced to 250MB on FreeBSD.
 */
-#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__)
-#include <sys/resource.h>
-#define MMAP_REGION_START	((uintptr_t)0x10000000)
-#else
+#if LJ_TARGET_OSX
 #define MMAP_REGION_START	((uintptr_t)0x10000)
+#else
+#define MMAP_REGION_START	((uintptr_t)0x10000000)
 #endif
 #define MMAP_REGION_END		((uintptr_t)0x80000000)
 
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
+#include <sys/resource.h>
+#endif
+
 static LJ_AINLINE void *CALL_MMAP(size_t size)
 {
   int olderr = errno;
@@ -227,6 +230,10 @@ static LJ_AINLINE void *CALL_MMAP(size_t size)
       return p;
     }
     if (p != CMFAIL) munmap(p, size);
+#ifdef __sun__
+    alloc_hint += 0x1000000;  /* Need near-exhaustive linear scan. */
+    if (alloc_hint + size < MMAP_REGION_END) continue;
+#endif
     if (retry) break;
     retry = 1;
     alloc_hint = MMAP_REGION_START;

src/luajit.c

@@ -499,15 +499,15 @@ static int handle_luainit(lua_State *L)
     return dostring(L, init, "=" LUA_INIT);
 }
 
-struct Smain {
+static struct Smain {
   char **argv;
   int argc;
   int status;
-};
+} smain;
 
 static int pmain(lua_State *L)
 {
-  struct Smain *s = (struct Smain *)lua_touserdata(L, 1);
+  struct Smain *s = &smain;
   char **argv = s->argv;
   int script;
   int flags = 0;
@@ -556,17 +556,16 @@ static int pmain(lua_State *L)
 int main(int argc, char **argv)
 {
   int status;
-  struct Smain s;
   lua_State *L = lua_open();  /* create state */
   if (L == NULL) {
     l_message(argv[0], "cannot create state: not enough memory");
     return EXIT_FAILURE;
   }
-  s.argc = argc;
-  s.argv = argv;
-  status = lua_cpcall(L, pmain, &s);
+  smain.argc = argc;
+  smain.argv = argv;
+  status = lua_cpcall(L, pmain, NULL);
   report(L, status);
   lua_close(L);
-  return (status || s.status) ? EXIT_FAILURE : EXIT_SUCCESS;
+  return (status || smain.status) ? EXIT_FAILURE : EXIT_SUCCESS;
 }
 

src/vm_x86.dasc

@@ -6152,7 +6152,11 @@ static void emit_asm_debug(BuildCtx *ctx)
 	".LEFDE1:\n\n", (int)ctx->codesz - fcofs);
 #endif
 #if (defined(__sun__) && defined(__svr4__))
+#if LJ_64
+    fprintf(ctx->fp, "\t.section .eh_frame,\"a\",@unwind\n");
+#else
     fprintf(ctx->fp, "\t.section .eh_frame,\"aw\",@progbits\n");
+#endif
 #else
     fprintf(ctx->fp, "\t.section .eh_frame,\"a\",@progbits\n");
 #endif