test/MC/COFF/section-name-encoding.s

   1 // Check that COFF section names are properly encoded.
   2 //
   3 // Encodings for different lengths:
   4 //   [0, 8]:               raw name
   5 //   (8, 999999]:          base 10 string table index (/9999999)
   6 //
   7 // RUN: llvm-mc -triple x86_64-pc-win32 -filetype=obj %s | llvm-readobj -s | FileCheck %s
   8
   9 // Raw encoding
  10
  11 // CHECK:   Section {
  12 // CHECK:     Number: 1
  13 // CHECK:     Name: s (73 00 00 00 00 00 00 00)
  14 // CHECK:   }
  15 // CHECK:   Section {
  16 // CHECK:     Number: 2
  17 // CHECK:     Name: s1234567 (73 31 32 33 34 35 36 37)
  18 // CHECK:   }
  19 .section s;        .long 1
  20 .section s1234567; .long 1
  21
  22
  23 // Base 10 encoding
  24
  25 // /4
  26 // CHECK:   Section {
  27 // CHECK:     Number: 3
  28 // CHECK:     Name: s12345678 (2F 34 00 00 00 00 00 00)
  29 // CHECK:   }
  30 .section s12345678; .long 1
  31
  32
  33 // Generate padding sections to increase the string table size to at least
  34 // 1,000,000 bytes.
  35 .macro pad_sections2 pad
  36   // 10x \pad
  37   .section p0\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad; .long 1
  38   .section p1\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad; .long 1
  39   .section p2\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad; .long 1
  40   .section p3\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad; .long 1
  41   .section p4\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad; .long 1
  42 .endm
  43
  44 .macro pad_sections pad
  45   // 20x \pad
  46   pad_sections2 \pad\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad
  47 .endm
  48
  49 // 1000x 'a'
  50 pad_sections aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
  51
  52
  53 // /1000029 == 4 + 10 + (5 * (2 + (20 * 10 * 1000) + 1))
  54 //             v   |     |    v    ~~~~~~~~~~~~~~    v
  55 //    table size   v     v   "p0"        pad         NUL seperator
  56 //     "s12345678\0"     # of pad sections
  57 //
  58 // CHECK:   Section {
  59 // CHECK:     Number: 9
  60 // CHECK:     Name: seven_digit (2F 31 30 30 30 30 32 39)
  61 // CHECK:   }
  62 .section seven_digit; .long 1