From 9a309e895bb88a083440228bd32c5766d540e1a7 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Fri, 5 Jun 2015 22:28:12 -0400
Subject: weak symbols using mingw toolchain

---
 weak/a.c           |  11 ++++++++++
 weak/a.o           | Bin 0 -> 848 bytes
 weak/a.o.dis       |  34 +++++++++++++++++++++++++++++
 weak/a_and_b.log   |   2 ++
 weak/aonly.dll.dis |  61 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 weak/b.c           |   7 ++++++
 weak/b.o           | Bin 0 -> 700 bytes
 weak/b.o.dis       |  13 ++++++++++++
 8 files changed, 128 insertions(+)
 create mode 100644 weak/a.c
 create mode 100644 weak/a.o
 create mode 100644 weak/a.o.dis
 create mode 100644 weak/a_and_b.log
 create mode 100644 weak/aonly.dll.dis
 create mode 100644 weak/b.c
 create mode 100644 weak/b.o
 create mode 100644 weak/b.o.dis

diff --git a/weak/a.c b/weak/a.c
new file mode 100644
index 0000000..49f7d57
--- /dev/null
+++ b/weak/a.c
@@ -0,0 +1,11 @@
+int __sym(int x)
+{
+	return x+1;
+}
+
+extern int sym(int x) __attribute__((weak,alias("__sym")));
+
+int same(int x)
+{
+	return sym(x)*3;
+}
diff --git a/weak/a.o b/weak/a.o
new file mode 100644
index 0000000..98fded8
Binary files /dev/null and b/weak/a.o differ
diff --git a/weak/a.o.dis b/weak/a.o.dis
new file mode 100644
index 0000000..f93146b
--- /dev/null
+++ b/weak/a.o.dis
@@ -0,0 +1,34 @@
+
+a.o:     Dateiformat pe-x86-64
+
+
+Disassembly of section .text:
+
+0000000000000000 <__sym>:
+   0:	8d 41 01             	lea    0x1(%rcx),%eax
+   3:	c3                   	retq   
+   4:	66 66 66 2e 0f 1f 84 	data32 data32 nopw %cs:0x0(%rax,%rax,1)
+   b:	00 00 00 00 00 
+
+0000000000000010 <same>:
+  10:	48 83 ec 28          	sub    $0x28,%rsp
+  14:	e8 00 00 00 00       	callq  19 <same+0x9>
+			15: R_X86_64_PC32	sym
+  19:	8d 04 40             	lea    (%rax,%rax,2),%eax
+  1c:	48 83 c4 28          	add    $0x28,%rsp
+  20:	c3                   	retq   
+  21:	90                   	nop
+  22:	90                   	nop
+  23:	90                   	nop
+  24:	90                   	nop
+  25:	90                   	nop
+  26:	90                   	nop
+  27:	90                   	nop
+  28:	90                   	nop
+  29:	90                   	nop
+  2a:	90                   	nop
+  2b:	90                   	nop
+  2c:	90                   	nop
+  2d:	90                   	nop
+  2e:	90                   	nop
+  2f:	90                   	nop
diff --git a/weak/a_and_b.log b/weak/a_and_b.log
new file mode 100644
index 0000000..e989602
--- /dev/null
+++ b/weak/a_and_b.log
@@ -0,0 +1,2 @@
+a.o:a.c:(.text+0x15): undefined reference to `sym'
+b.o:b.c:(.text+0x5): undefined reference to `sym'
diff --git a/weak/aonly.dll.dis b/weak/aonly.dll.dis
new file mode 100644
index 0000000..3f23601
--- /dev/null
+++ b/weak/aonly.dll.dis
@@ -0,0 +1,61 @@
+
+aonly.dll:     file format pei-x86-64
+
+
+Disassembly of section .text:
+
+0000000010001000 <__sym>:
+    10001000:	8d 41 01             	lea    0x1(%rcx),%eax
+    10001003:	c3                   	retq   
+    10001004:	66 66 66 2e 0f 1f 84 	data32 data32 nopw %cs:0x0(%rax,%rax,1)
+    1000100b:	00 00 00 00 00 
+
+0000000010001010 <same>:
+    10001010:	48 83 ec 28          	sub    $0x28,%rsp
+    10001014:	e8 e7 ff ff ff       	callq  10001000 <__sym>
+    10001019:	8d 04 40             	lea    (%rax,%rax,2),%eax
+    1000101c:	48 83 c4 28          	add    $0x28,%rsp
+    10001020:	c3                   	retq   
+    10001021:	90                   	nop
+    10001022:	90                   	nop
+    10001023:	90                   	nop
+    10001024:	90                   	nop
+    10001025:	90                   	nop
+    10001026:	90                   	nop
+    10001027:	90                   	nop
+    10001028:	90                   	nop
+    10001029:	90                   	nop
+    1000102a:	90                   	nop
+    1000102b:	90                   	nop
+    1000102c:	90                   	nop
+    1000102d:	90                   	nop
+    1000102e:	90                   	nop
+    1000102f:	90                   	nop
+
+0000000010001030 <__CTOR_LIST__>:
+    10001030:	ff                   	(bad)  
+    10001031:	ff                   	(bad)  
+    10001032:	ff                   	(bad)  
+    10001033:	ff                   	(bad)  
+    10001034:	ff                   	(bad)  
+    10001035:	ff                   	(bad)  
+    10001036:	ff                   	(bad)  
+    10001037:	ff 00                	incl   (%rax)
+    10001039:	00 00                	add    %al,(%rax)
+    1000103b:	00 00                	add    %al,(%rax)
+    1000103d:	00 00                	add    %al,(%rax)
+	...
+
+0000000010001040 <__DTOR_LIST__>:
+    10001040:	ff                   	(bad)  
+    10001041:	ff                   	(bad)  
+    10001042:	ff                   	(bad)  
+    10001043:	ff                   	(bad)  
+    10001044:	ff                   	(bad)  
+    10001045:	ff                   	(bad)  
+    10001046:	ff                   	(bad)  
+    10001047:	ff 00                	incl   (%rax)
+    10001049:	00 00                	add    %al,(%rax)
+    1000104b:	00 00                	add    %al,(%rax)
+    1000104d:	00 00                	add    %al,(%rax)
+	...
diff --git a/weak/b.c b/weak/b.c
new file mode 100644
index 0000000..c7a1f11
--- /dev/null
+++ b/weak/b.c
@@ -0,0 +1,7 @@
+int sym(int x);
+
+int test(int x)
+{
+	return sym(x)*2;
+}
+
diff --git a/weak/b.o b/weak/b.o
new file mode 100644
index 0000000..45beb82
Binary files /dev/null and b/weak/b.o differ
diff --git a/weak/b.o.dis b/weak/b.o.dis
new file mode 100644
index 0000000..72c0677
--- /dev/null
+++ b/weak/b.o.dis
@@ -0,0 +1,13 @@
+
+b.o:     Dateiformat pe-x86-64
+
+
+Disassembly of section .text:
+
+0000000000000000 <test>:
+   0:	48 83 ec 28          	sub    $0x28,%rsp
+   4:	e8 00 00 00 00       	callq  9 <test+0x9>
+			5: R_X86_64_PC32	sym
+   9:	01 c0                	add    %eax,%eax
+   b:	48 83 c4 28          	add    $0x28,%rsp
+   f:	c3                   	retq   
-- 
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