diff lld/test/ELF/eh-frame-negative-pcrel-sdata8.s @ 150:1d019706d866

LLVM10
author anatofuz
date Thu, 13 Feb 2020 15:10:13 +0900
parents
children 0572611fdcc8
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lld/test/ELF/eh-frame-negative-pcrel-sdata8.s	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,85 @@
+# REQUIRES: x86
+
+# Test handling of FDE pc negative relative addressing with DW_EH_PE_sdata8.
+# This situation can arise when .eh_frame is placed after .text.
+
+# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
+# RUN: echo "SECTIONS { .text : { *(.text) } .eh_frame : { *(.eh_frame) } }" > %t.script
+# RUN: ld.lld --eh-frame-hdr --script %t.script --section-start .text=0x1000 %t.o -o %t
+# RUN: llvm-readobj -S --section-data %t | FileCheck %s
+
+# CHECK:      Section {
+# CHECK:        Index:
+# CHECK:        Name: .eh_frame
+# CHECK-NEXT:   Type: SHT_PROGBITS
+# CHECK-NEXT:   Flags [
+# CHECK-NEXT:     SHF_ALLOC
+# CHECK-NEXT:   ]
+# CHECK-NEXT:   Address: 0x1001
+# CHECK-NEXT:   Offset: 0x1001
+# CHECK-NEXT:   Size:
+# CHECK-NEXT:   Link:
+# CHECK-NEXT:   Info:
+# CHECK-NEXT:   AddressAlignment:
+# CHECK-NEXT:   EntrySize:
+# CHECK-NEXT:   SectionData (
+# CHECK-NEXT:     0000: 14000000 00000000 017A5200 01010101
+# CHECK-NEXT:     0010: 1C000000 00000000 14000000 1C000000
+# CHECK-NEXT:     0020: DFFFFFFF FFFFFFFF
+#                       ^
+#   DFFFFFFF FFFFFFFF = _start(0x1000) - PC(.eh_frame(0x1001) + 0x20)
+
+# CHECK:      Section {
+# CHECK:        Index:
+# CHECK:        Name: .eh_frame_hdr
+# CHECK-NEXT:   Type: SHT_PROGBITS
+# CHECK-NEXT:   Flags [
+# CHECK-NEXT:     SHF_ALLOC
+# CHECK-NEXT:   ]
+# CHECK-NEXT:   Address: 0x1038
+# CHECK-NEXT:   Offset: 0x1038
+# CHECK-NEXT:   Size: 20
+# CHECK-NEXT:   Link: 0
+# CHECK-NEXT:   Info: 0
+# CHECK-NEXT:   AddressAlignment: 4
+# CHECK-NEXT:   EntrySize: 0
+# CHECK-NEXT:   SectionData (
+# CHECK-NEXT:     0000: 011B033B C5FFFFFF 01000000 C8FFFFFF
+# CHECK-NEXT:     0010: E1FFFFFF
+#   Header (always 4 bytes): 011B033B
+#   C5FFFFFF = .eh_frame(0x1001) - .eh_frame_hdr(0x1038) - 4
+#   01000000 = 1 = the number of FDE pointers in the table.
+#   C8FFFFFF = _start(0x1000) - .eh_frame_hdr(0x1038)
+#   E1FFFFFF = FDE(.eh_frame(0x1001) + 0x18) - .eh_frame_hdr(0x1038)
+
+.text
+.global _start
+_start:
+ nop
+
+.section .eh_frame, "a"
+  .long 16   # Size
+  .long 0x00 # ID
+  .byte 0x01 # Version.
+
+  .byte 0x7A # Augmentation string: "zR"
+  .byte 0x52
+  .byte 0x00
+
+  .byte 0x01
+
+  .byte 0x01 # LEB128
+  .byte 0x01 # LEB128
+
+  .byte 0x01 # LEB128
+  .byte 0x1C # DW_EH_PE_pcrel | DW_EH_PE_sdata8
+
+  .byte 0x00
+  .byte 0x00
+  .byte 0x00
+
+  .long 16   # Size
+  .long 24   # ID
+fde:
+  .quad _start - fde
+  .long 0