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libmach: set correct endianness with little endian ELF32 mips binaries

--- a/sys/src/libmach/executable.c

+++ b/sys/src/libmach/executable.c

@@ -733,8 +733,16 @@

 		break;

 	case MIPS:

 		mach = &mmips;

-		fp->type = FMIPS;

-		fp->name = "mips ELF32 executable";

+		if(ep->ident[DATA] == ELFDATA2LSB){

+			fp->type = FMIPSLE;

+			fp->name = "mips le ELF32 executable";

+		} else if(ep->ident[DATA] == ELFDATA2MSB){

+			fp->type = FMIPS;

+			fp->name = "mips be ELF32 executable";

+		} else {

+			werrstr("bad ELF32 encoding - not big or little endian");

+			return 0;

+		}

 		break;

 	case SPARC64:

 		mach = &msparc64;