test/MC/ARM/eh-directive-text-section.s

   1 @ RUN: llvm-mc %s -triple=armv7-unknown-linux-gnueabi -filetype=obj -o - \
   2 @ RUN:   | llvm-readobj -S --sd --sr | FileCheck %s
   3
   4 @ Check the .fnstart directive and the .fnend directive.
   5
   6 @ The .fnstart directive and .fnend directive should create an entry in
   7 @ exception handling table.  For example, if the function is defined in .text
   8 @ section, then there should be an entry in .ARM.exidx section.
   9
  10         .syntax unified
  11
  12         .text
  13         .globl  func1
  14         .align  2
  15         .type   func1,%function
  16         .fnstart
  17 func1:
  18         bx      lr
  19         .fnend
  20
  21
  22
  23 @-------------------------------------------------------------------------------
  24 @ Check the .text section.
  25 @-------------------------------------------------------------------------------
  26 @ CHECK: Sections [
  27 @ CHECK:   Section {
  28
  29 @-------------------------------------------------------------------------------
  30 @ Check the index of .text section.  This will be used in .ARM.exidx.
  31 @-------------------------------------------------------------------------------
  32 @ CHECK:     Index: 2
  33 @ CHECK-NEXT:     Name: .text
  34 @ CHECK:     Type: SHT_PROGBITS (0x1)
  35 @ CHECK:     Flags [ (0x6)
  36 @ CHECK:       SHF_ALLOC (0x2)
  37 @ CHECK:       SHF_EXECINSTR (0x4)
  38 @ CHECK:     ]
  39 @ CHECK:     SectionData (
  40 @ CHECK:       0000: 1EFF2FE1                             |../.|
  41 @ CHECK:     )
  42 @ CHECK:   }
  43
  44
  45 @-------------------------------------------------------------------------------
  46 @ Check the name of the EXIDX section.  For the function in the .text section,
  47 @ this should be .ARM.exidx.  It is incorrect to see .ARM.exidx.text here.
  48 @-------------------------------------------------------------------------------
  49 @ CHECK:   Section {
  50 @ CHECK:     Name: .ARM.exidx
  51 @ CHECK:     Type: SHT_ARM_EXIDX (0x70000001)
  52 @ CHECK:     Flags [ (0x82)
  53 @ CHECK:       SHF_ALLOC (0x2)
  54 @ CHECK:       SHF_LINK_ORDER (0x80)
  55 @ CHECK:     ]
  56
  57 @-------------------------------------------------------------------------------
  58 @ Check the linked section of the EXIDX section.  This should be the index
  59 @ of the .text section.
  60 @-------------------------------------------------------------------------------
  61 @ CHECK:     Link: 2
  62
  63 @-------------------------------------------------------------------------------
  64 @ The first word should be the offset to .text.  The second word should be
  65 @ 0xB0B0B080, which means compact model 0 is used (0x80) and the rest of the
  66 @ word is filled with FINISH opcode (0xB0).
  67 @-------------------------------------------------------------------------------
  68 @ CHECK:     SectionData (
  69 @ CHECK:       0000: 00000000 B0B0B080                    |........|
  70 @ CHECK:     )
  71 @ CHECK:   }
  72 @ CHECK: ]
  73
  74 @-------------------------------------------------------------------------------
  75 @ The first word should be relocated to the code address in .text section.
  76 @ Besides, since this function is using compact model 0, thus we have to
  77 @ add an relocation to __aeabi_unwind_cpp_pr0.
  78 @-------------------------------------------------------------------------------
  79 @ CHECK:     Relocations [
  80 @ CHECK:       0x0 R_ARM_NONE __aeabi_unwind_cpp_pr0 0x0
  81 @ CHECK:       0x0 R_ARM_PREL31 .text 0x0
  82 @ CHECK:     ]