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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - reserved symbols specified in version script do not exist in linked output"
href="https://bugs.llvm.org/show_bug.cgi?id=35570">35570</a>
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</tr>
<tr>
<th>Summary</th>
<td>reserved symbols specified in version script do not exist in linked output
</td>
</tr>
<tr>
<th>Product</th>
<td>lld
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>FreeBSD
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>ELF
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>emaste@freebsd.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>In FreeBSD's libc version script we include the linker-generated _end -
excerpt:
...
FBSDprivate_1.0 {
global:
...
_end;
...
local:
*;
} FBSD_1.5;
However the _end symbol does not appear in the output object:
% readelf -s /lib/libc.so.7 | grep -w _end
%
When linked with ld.bfd we get:
% readelf -s /lib/libc.so.7 | grep -w _end
197: 00000000005e8bc0 0 NOTYPE GLOBAL DEFAULT ABS
_end@@FBSDprivate_1.0 (8)
%
A sketch of a test case for this issue:
# REQUIRES: x86
# RUN: echo "FBSDprivate_1.0 { global: _end; local: *; };" > %t.script
# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-freebsd %s -o %t.o
# RUN: ld.lld --version-script %t.script -shared %t.o -o %t.so
# RUN: llvm-readobj -dyn-symbols %t.so | FileCheck %s
# CHECK: DynamicSymbols [
# CHECK-NEXT: Symbol {
# CHECK-NEXT: Name: @
# CHECK-NEXT: Value: 0x0
# CHECK-NEXT: Size: 0
# CHECK-NEXT: Binding: Local (0x0)
# CHECK-NEXT: Type: None (0x0)
# CHECK-NEXT: Other: 0
# CHECK-NEXT: Section: Undefined (0x0)
# CHECK-NEXT: }
# CHECK-NEXT: Symbol {
# CHECK-NEXT: Name: _end@@FBSDprivate_1.0
# CHECK-NEXT: Value: 0
# CHECK-NEXT: Size: 0
# CHECK-NEXT: Binding: Global (0x1)
# CHECK-NEXT: Type: None (0x0)
# CHECK-NEXT: Other: 0
# CHECK-NEXT: Section: Undefined (0x0)
# CHECK-NEXT: }
# CHECK-NEXT: ]
.section .data
.globl _end
.globl bar
bar:
.quad _end</pre>
</div>
</p>
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