[lld] r356230 - [ELF] Add a test for large .bss.rel.ro

[Fangrui Song via llvm-commits]

Author: maskray
Date: Thu Mar 14 20:37:42 2019
New Revision: 356230

URL: http://llvm.org/viewvc/llvm-project?rev=356230&view=rev
Log:
[ELF] Add a test for large .bss.rel.ro

Reviewers: ruiu, pcc, espindola

Reviewed By: pcc

Subscribers: emaste, arichardson, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D59404

Added:
    lld/trunk/test/ELF/relro-bss.s

Added: lld/trunk/test/ELF/relro-bss.s
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/test/ELF/relro-bss.s?rev=356230&view=auto
==============================================================================
--- lld/trunk/test/ELF/relro-bss.s (added)
+++ lld/trunk/test/ELF/relro-bss.s Thu Mar 14 20:37:42 2019
@@ -0,0 +1,44 @@
+# REQUIRES: x86
+# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
+# RUN: ld.lld %t.o -o %t
+# RUN: llvm-readelf -l %t | FileCheck --check-prefix=SEG %s
+# RUN: llvm-readelf -S %t | FileCheck %s
+
+# We have 2 RW PT_LOAD segments. p_offset p_vaddr p_paddr p_filesz of the first
+# should match PT_GNU_RELRO.
+# Because .bss.rel.ro (nobits) doesn't take space, p_filesz < p_memsz.
+
+#           Type           Offset   VirtAddr           PhysAddr           FileSiz  MemSiz   Flg Align
+# SEG:      LOAD           0x001000 0x0000000000201000 0x0000000000201000 0x000001 0x000001 R E 0x1000
+# SEG-NEXT: LOAD           0x002000 0x0000000000202000 0x0000000000202000 0x000001 0x002001 RW  0x1000
+# SEG-NEXT: LOAD           0x003000 0x0000000000205000 0x0000000000205000 0x000001 0x000002 RW  0x1000
+# SEG-NEXT: GNU_RELRO      0x002000 0x0000000000202000 0x0000000000202000 0x000001 0x003000 R   0x1
+# SEG-NEXT: GNU_STACK      0x000000 0x0000000000000000 0x0000000000000000 0x000000 0x000000 RW  0x0
+
+# SEG:      .text
+# SEG-NEXT: .data.rel.ro .bss.rel.ro
+# SEG-NEXT: .data .bss
+
+# And .data is placed in the next page (sh_offset = alignTo(0x2001, 4096) = 0x3000).
+
+#        [Nr] Name              Type            Address          Off    Size
+# CHECK:      .data.rel.ro      PROGBITS        0000000000202000 002000 000001
+# CHECK-NEXT: .bss.rel.ro       NOBITS          0000000000202001 002001 002000
+# CHECK-NEXT: .data             PROGBITS        0000000000205000 003000 000001
+# CHECK-NEXT: .bss              NOBITS          0000000000205001 003001 000001
+
+.globl _start
+_start:
+  ret
+
+.section .data.rel.ro, "aw"
+.space 1
+
+.section .bss.rel.ro, "aw", @nobits
+.space 8192
+
+.section .data, "aw"
+.space 1
+
+.section .bss, "aw"
+.space 1