From efc615e033a4e0e3ed23e62edb3053a80a43b437 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Tue, 22 Dec 2015 23:26:55 -0500
Subject: mdso_generate_symentry(): initial implementation.

---
 include/mdso/mdso.h                |  1 +
 project/common.mk                  |  1 +
 src/logic/mdso_generate_symentry.c | 60 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 62 insertions(+)
 create mode 100644 src/logic/mdso_generate_symentry.c

diff --git a/include/mdso/mdso.h b/include/mdso/mdso.h
index f912fe8..2ac8dd4 100644
--- a/include/mdso/mdso.h
+++ b/include/mdso/mdso.h
@@ -91,6 +91,7 @@ mdso_api int  mdso_output_export_symbols(const struct mdso_unit_ctx *, const str
 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);
+mdso_api int      mdso_generate_symentry(const struct mdso_common_ctx *, const char * sym, FILE * fout);
 
 #ifdef __cplusplus
 }
diff --git a/project/common.mk b/project/common.mk
index 2d7fad1..2533550 100644
--- a/project/common.mk
+++ b/project/common.mk
@@ -3,6 +3,7 @@ COMMON_SRCS = \
 	src/crc/mdso_crc32.c \
 	src/driver/mdso_driver_ctx.c \
 	src/driver/mdso_unit_ctx.c \
+	src/logic/mdso_generate_symentry.c \
 	src/logic/mdso_map_input.c \
 	src/output/mdso_create_output.c \
 	src/output/mdso_output_export_symbols.c \
diff --git a/src/logic/mdso_generate_symentry.c b/src/logic/mdso_generate_symentry.c
new file mode 100644
index 0000000..df55186
--- /dev/null
+++ b/src/logic/mdso_generate_symentry.c
@@ -0,0 +1,60 @@
+/****************************************************************/
+/*  mdso: midipix dso scavenger                                 */
+/*  Copyright (C) 2015  Z. Gilboa                               */
+/*  Released under GPLv2 and GPLv3; see COPYING.MDSO.           */
+/****************************************************************/
+
+#include <stdint.h>
+#include <stdio.h>
+#include <mdso/mdso.h>
+#include <mdso/mdso_specs.h>
+
+static const char * const asm_lines[] = {
+	"\t.file     \"__%s_sym_entry.s\"\n",
+
+	"\t.section  " MDSO_STRS_SECTION ",\"r\"\n",
+	"\t.globl    .__dsostr_%s\n",
+	"\t.balign   2\n\n",
+	".__dsostr_%s:\n",
+	"\t.ascii\t\"%s\\0\"\n\n"
+
+	"\t.section  " MDSO_SYMS_SECTION ",\"r\"\n",
+	"\t.globl    __imp_%s\n",
+	0
+};
+
+int mdso_generate_symentry(
+	const struct mdso_common_ctx *	cctx,
+	const char *			sym,
+	FILE *				fout)
+{
+	const char * const *	line;
+	const char *		alignstr;
+	const char *		ptrsize;
+
+	if (cctx->drvflags & MDSO_DRIVER_QUAD_PTR) {
+		alignstr = "\t.balign   16\n\n";
+		ptrsize  = ".quad";
+	} else {
+		alignstr = "\t.balign   8\n\n";
+		ptrsize  = ".long";
+	}
+
+	for (line=asm_lines; *line; line++)
+		if ((fprintf(fout,*line,sym)) < 0)
+			return -1;
+
+	if ((fputs(alignstr,fout)) < 0)
+		return -1;
+
+	if ((fprintf(fout,"__imp_%s:\n",sym)) < 0)
+		return -1;
+
+	if ((fprintf(fout,"\t%s\t.__dsostr_%s\n",ptrsize,sym)) < 0)
+		return -1;
+
+	if ((fprintf(fout,"\t%s\t.__dsometa_%s\n",ptrsize,cctx->libname)) < 0)
+		return -1;
+
+	return 0;
+}
-- 
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