test: nasm-t -- Add obj test

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>

travis/test/obj.asm

@@ -0,0 +1,87 @@
+;Testname=unoptimized; Arguments=-O0 -fobj -oobj.o; Files=stdout stderr obj.o
+;Testname=optimized;   Arguments=-Ox -fobj -oobj.o; Files=stdout stderr obj.o
+
+; test source file for assembling to Microsoft 16-bit .OBJ
+; build with (16-bit Microsoft C):
+;    nasm -f obj objtest.asm
+;    cl /AL objtest.obj objlink.c
+; other compilers should work too, provided they handle large
+; model in the same way as MS C
+
+; This file should test the following:
+; [1] Define and export a global symbol
+; [2] Define a non-global symbol
+; [3] Define a common symbol
+; [4] Define a NASM local label
+; [5] Reference a NASM local label
+; [6] Import an external symbol
+; [7] Make a PC-relative relocated reference
+; [8] Reference a symbol in the same section as itself
+; [9] Reference a symbol in a different segment from itself
+; [10] Define a segment group
+; [11] Take the offset of a symbol in a grouped segment w.r.t. its segment
+; [12] Reserve uninitialised data space in a segment
+; [13] Directly take the segment address of a segment
+; [14] Directly take the segment address of a group
+; [15] Use SEG on a non-external
+; [16] Use SEG on an external
+
+	  bits 16
+
+	  global _bsssym	; [1]
+	  global _function	; [1]
+	  global _selfptr	; [1]
+	  global _selfptr2	; [1]
+	  common _commvar 2	; [3]
+	  extern _printf	; [6]
+
+	  group mygroup mybss mydata
+	  group mygroup2 mycode mycode2
+
+	  segment mycode private
+
+_function push bp
+	  mov bp,sp
+	  push ds
+	  mov ax,mygroup	; [14]
+	  mov ds,ax
+	  inc word [_bsssym]	; [9]
+	  mov ax,seg _commvar
+	  mov ds,ax
+	  dec word [_commvar]
+	  pop ds
+	  mov ax,[bp+6]
+	  mov dx,[bp+8]
+	  push dx
+	  push ax
+	  push dx
+	  push ax
+	  call far [cs:.printf]	; [5] [8]
+	  pop ax
+	  pop ax
+	  call trampoline	; [7]
+	  pop ax
+	  pop ax
+	  mov sp,bp
+	  pop bp
+	  retf
+
+.printf	  dw _printf, seg _printf ; [2] [4] [16]
+.printfd  dd _printf, seg _printf ; [2] [4] [16]
+.printfq  dq _printf, seg _printf ; [2] [4] [16]
+
+	  segment mycode2 private
+
+trampoline: pop ax
+	  push cs
+	  push ax
+	  jmp far _printf
+
+	  segment mybss private
+
+_bsssym	  resw 64		; [12]
+
+	  segment mydata private
+
+_selfptr  dw _selfptr, seg _selfptr ; [8] [15]
+_selfptr2 dw _selfptr2 wrt mydata, mydata ; [11] [13]

travis/test/obj.json

@@ -0,0 +1,18 @@
+[
+	{
+		"description": "Test 16 bit obj format (-Ox)",
+		"id": "obj",
+		"format": "obj",
+		"source": "obj.asm",
+		"option": "-Ox",
+		"target": [
+			{ "output": "obj.o" },
+			{ "stderr": "obj.stderr" }
+		]
+	},
+	{
+		"description": "Test obj format (-O0)",
+		"ref": "obj",
+		"option": "-O0"
+	}
+]

travis/test/obj.stderr

@@ -0,0 +1,3 @@
+./travis/test/obj.asm:70: warning: 32-bit segment relocation zero-extended from 16 bits [-w+zext-reloc]
+./travis/test/obj.asm:71: warning: 64-bit unsigned relocation zero-extended from 32 bits [-w+zext-reloc]
+./travis/test/obj.asm:71: warning: 64-bit segment relocation zero-extended from 16 bits [-w+zext-reloc]