Make LuaJIT function on OmniOS.

OmniOS should take the same approach as the BSDs for allocating
within the 4GB boundary. This won't fix evil stack issues, but
emperically they seem easy to avoid.

Additionally, our toolchain appears to want eh_frame in the
amd64 unwind section with only alloc flags.

.gitignore

@@ -42,6 +42,7 @@ src/scripts/noit-config
 src/udns/udns_codes.c
 src/utils/dtrace_probes.h
 src/LuaJIT/lib/vmdef.lua
+src/LuaJIT/src/jit/vmdef.lua
 src/LuaJIT/src/buildvm
 src/LuaJIT/src/lj_bcdef.h
 src/LuaJIT/src/lj_ffdef.h

src/LuaJIT/src/lj_alloc.c

@@ -188,14 +188,14 @@ 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__)
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) || defined(__sun__)
 #include <sys/resource.h>
 #define MMAP_REGION_START	((uintptr_t)0x10000000)
 #else

src/LuaJIT/src/vm_x86.dasc

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