test/MC/ARM/eh-directive-pad.s

   1 @ RUN: llvm-mc %s -triple=armv7-unknown-linux-gnueabi -filetype=obj -o - \
   2 @ RUN:   | llvm-readobj -S --sd | FileCheck %s
   3
   4 @ Check for different stack pointer offsets.
   5
   6 @ The .pad directive will track the stack pointer offsets.  There are several
   7 @ ways to encode the stack offsets.  We have to test:
   8 @
   9 @              offset <  0x00
  10 @              offset == 0x00
  11 @     0x04  <= offset <= 0x100
  12 @     0x104 <= offset <= 0x200
  13 @     0x204 <= offset
  14
  15
  16         .syntax unified
  17
  18 @-------------------------------------------------------------------------------
  19 @ TEST1
  20 @-------------------------------------------------------------------------------
  21         .section        .TEST1
  22         .globl  func1
  23         .align  2
  24         .type   func1,%function
  25         .fnstart
  26 func1:
  27         .pad    #0
  28         sub     sp, sp, #0
  29         add     sp, sp, #0
  30         bx      lr
  31         .personality __gxx_personality_v0
  32         .handlerdata
  33         .fnend
  34
  35 @-------------------------------------------------------------------------------
  36 @ The assembler should emit nothing (will be filled up with finish opcode).
  37 @-------------------------------------------------------------------------------
  38 @ CHECK: Section {
  39 @ CHECK:   Name: .ARM.extab.TEST1
  40 @ CHECK:   SectionData (
  41 @ CHECK:     0000: 00000000 B0B0B000                    |........|
  42 @ CHECK:   )
  43 @ CHECK: }
  44
  45
  46
  47 @-------------------------------------------------------------------------------
  48 @ TEST2
  49 @-------------------------------------------------------------------------------
  50         .section        .TEST2
  51         .globl  func2a
  52         .align  2
  53         .type   func2a,%function
  54         .fnstart
  55 func2a:
  56         .pad    #0x4
  57         sub     sp, sp, #0x4
  58         add     sp, sp, #0x4
  59         bx      lr
  60         .personality __gxx_personality_v0
  61         .handlerdata
  62         .fnend
  63
  64         .globl  func2b
  65         .align  2
  66         .type   func2b,%function
  67         .fnstart
  68 func2b:
  69         .pad    #0x100
  70         sub     sp, sp, #0x100
  71         add     sp, sp, #0x100
  72         bx      lr
  73         .personality __gxx_personality_v0
  74         .handlerdata
  75         .fnend
  76
  77 @-------------------------------------------------------------------------------
  78 @ The assembler should emit ((offset - 4) >> 2).
  79 @-------------------------------------------------------------------------------
  80 @ CHECK: Section {
  81 @ CHECK:   Name: .ARM.extab.TEST2
  82 @ CHECK:   SectionData (
  83 @ CHECK:     0000: 00000000 B0B00000 00000000 B0B03F00  |..............?.|
  84 @ CHECK:   )
  85 @ CHECK: }
  86
  87
  88 @-------------------------------------------------------------------------------
  89 @ TEST3
  90 @-------------------------------------------------------------------------------
  91         .section        .TEST3
  92         .globl  func3a
  93         .align  2
  94         .type   func3a,%function
  95         .fnstart
  96 func3a:
  97         .pad    #0x104
  98         sub     sp, sp, #0x104
  99         add     sp, sp, #0x104
 100         bx      lr
 101         .personality __gxx_personality_v0
 102         .handlerdata
 103         .fnend
 104
 105         .globl  func3b
 106         .align  2
 107         .type   func3b,%function
 108         .fnstart
 109 func3b:
 110         .pad    #0x200
 111         sub     sp, sp, #0x200
 112         add     sp, sp, #0x200
 113         bx      lr
 114         .personality __gxx_personality_v0
 115         .handlerdata
 116         .fnend
 117
 118 @-------------------------------------------------------------------------------
 119 @ The assembler should emit 0x3F and ((offset - 0x104) >> 2).
 120 @-------------------------------------------------------------------------------
 121 @ CHECK: Section {
 122 @ CHECK:   Name: .ARM.extab.TEST3
 123 @ CHECK:   SectionData (
 124 @ CHECK:     0000: 00000000 B03F0000 00000000 B03F3F00  |.....?.......??.|
 125 @ CHECK:   )
 126 @ CHECK: }
 127
 128
 129
 130 @-------------------------------------------------------------------------------
 131 @ TEST4
 132 @-------------------------------------------------------------------------------
 133         .section        .TEST4
 134         .globl  func4a
 135         .align  2
 136         .type   func4a,%function
 137         .fnstart
 138 func4a:
 139         .pad    #0x204
 140         sub     sp, sp, #0x204
 141         add     sp, sp, #0x204
 142         bx      lr
 143         .personality __gxx_personality_v0
 144         .handlerdata
 145         .fnend
 146
 147         .globl  func4b
 148         .align  2
 149         .type   func4b,%function
 150         .fnstart
 151 func4b:
 152         .pad    #0x580
 153         sub     sp, sp, #0x580
 154         add     sp, sp, #0x580
 155         bx      lr
 156         .personality __gxx_personality_v0
 157         .handlerdata
 158         .fnend
 159
 160 @-------------------------------------------------------------------------------
 161 @ The assembler should emit 0xB2 and the ULEB128 encoding of
 162 @ ((offset - 0x204) >> 2).
 163 @-------------------------------------------------------------------------------
 164 @ CHECK: Section {
 165 @ CHECK:   Name: .ARM.extab.TEST4
 166 @ CHECK:   SectionData (
 167 @ CHECK:     0000: 00000000 B000B200 00000000 01DFB200  |................|
 168 @ CHECK:   )
 169 @ CHECK: }
 170
 171
 172
 173 @-------------------------------------------------------------------------------
 174 @ TEST5
 175 @-------------------------------------------------------------------------------
 176         .section        .TEST5
 177         .globl  func4a
 178         .align  2
 179         .type   func4a,%function
 180         .fnstart
 181 func5a:
 182         .pad    #-0x4
 183         add     sp, sp, #0x4
 184         sub     sp, sp, #0x4
 185         bx      lr
 186         .personality __gxx_personality_v0
 187         .handlerdata
 188         .fnend
 189
 190         .globl  func5b
 191         .align  2
 192         .type   func5b,%function
 193         .fnstart
 194 func5b:
 195         .pad    #-0x104
 196         add     sp, sp, #0x104
 197         sub     sp, sp, #0x4
 198         bx      lr
 199         .personality __gxx_personality_v0
 200         .handlerdata
 201         .fnend
 202
 203         .globl  func5c
 204         .align  2
 205         .type   func5c,%function
 206         .fnstart
 207 func5c:
 208         .pad    #-0x204
 209         add     sp, sp, #0x204
 210         sub     sp, sp, #0x4
 211         bx      lr
 212         .personality __gxx_personality_v0
 213         .handlerdata
 214         .fnend
 215
 216 @-------------------------------------------------------------------------------
 217 @ The assembler should emit (0x40 | (-offset - 4)) >> 2.  When (-offset - 4)
 218 @ is greater than 0x3f, then multiple 0x7f should be emitted.
 219 @-------------------------------------------------------------------------------
 220 @ CHECK: Section {
 221 @ CHECK:   Name: .ARM.extab.TEST5
 222 @ CHECK:   SectionData (
 223 @ CHECK:     0000: 00000000 B0B04000 00000000 B07F4000  |......@.......@.|
 224 @ CHECK:     0010: 00000000 7F7F4000                    |......@.|
 225 @ CHECK:   )
 226 @ CHECK: }