From 3b42f99f60194a4afea5bf04b9f1439ffde4d666 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Nov 11 2016 05:22:30 +0000
Subject: mdso_create_output(): initial implementation.


---

diff --git a/include/mdso/mdso.h b/include/mdso/mdso.h
index 7f68021..f809813 100644
--- a/include/mdso/mdso.h
+++ b/include/mdso/mdso.h
@@ -89,6 +89,7 @@ mdso_api int  mdso_output_export_symbols(const struct mdso_unit_ctx *, const str
 /* low-level api */
 mdso_api uint32_t mdso_crc32_mbstr	(const unsigned char * str, size_t * symlen);
 mdso_api uint64_t mdso_crc64_mbstr	(const unsigned char * str, size_t * symlen);
+mdso_api FILE *   mdso_create_output	(const struct mdso_driver_ctx *, const char * asmname);
 
 #ifdef __cplusplus
 }
diff --git a/project/common.mk b/project/common.mk
index 12c02e4..2d7fad1 100644
--- a/project/common.mk
+++ b/project/common.mk
@@ -4,6 +4,7 @@ COMMON_SRCS = \
 	src/driver/mdso_driver_ctx.c \
 	src/driver/mdso_unit_ctx.c \
 	src/logic/mdso_map_input.c \
+	src/output/mdso_create_output.c \
 	src/output/mdso_output_export_symbols.c \
 	src/skin/mdso_skin_default.c \
 
diff --git a/src/output/mdso_create_output.c b/src/output/mdso_create_output.c
new file mode 100644
index 0000000..3ecde61
--- /dev/null
+++ b/src/output/mdso_create_output.c
@@ -0,0 +1,37 @@
+/****************************************************************/
+/*  mdso: midipix dso scavenger                                 */
+/*  Copyright (C) 2015  Z. Gilboa                               */
+/*  Released under GPLv2 and GPLv3; see COPYING.MDSO.           */
+/****************************************************************/
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include <mdso/mdso.h>
+#include "mdso_driver_impl.h"
+
+FILE * mdso_create_output(
+	const struct mdso_driver_ctx *	dctx,
+	const char *			asmname)
+{
+	struct mdso_driver_ctx_impl *	ictx;
+	uintptr_t			addr;
+	int				fdout;
+
+	if (!dctx->cctx->dstdir)
+		return stdout;
+
+	addr = (uintptr_t)dctx - offsetof(struct mdso_driver_ctx_impl,ctx);
+	ictx = (struct mdso_driver_ctx_impl *)addr;
+
+	if ((fdout = openat(ictx->fddst,asmname,
+                        O_CREAT|O_TRUNC|O_WRONLY|O_NOCTTY|O_NOFOLLOW,
+                        S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
+		return 0;
+
+	return fdopen(fdout,"w");
+}