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 //   (999999, 0xFFFFFFFF]: base 64 string table index (//AAAAAA)
   7 //
   8 // RUN: llvm-mc -triple x86_64-pc-win32 -filetype=obj %s | llvm-readobj -s | FileCheck %s
   9
  10 // Raw encoding
  11
  12 // CHECK:   Section {
  13 // CHECK:     Number: 1
  14 // CHECK:     Name: s (73 00 00 00 00 00 00 00)
  15 // CHECK:   }
  16 // CHECK:   Section {
  17 // CHECK:     Number: 2
  18 // CHECK:     Name: s1234567 (73 31 32 33 34 35 36 37)
  19 // CHECK:   }
  20 .section s;        .long 1
  21 .section s1234567; .long 1
  22
  23
  24 // Base 10 encoding
  25
  26 // /4
  27 // CHECK:   Section {
  28 // CHECK:     Number: 3
  29 // CHECK:     Name: s12345678 (2F 34 00 00 00 00 00 00)
  30 // CHECK:   }
  31 .section s12345678; .long 1
  32
  33
  34 // Generate padding sections to increase the string table size to at least
  35 // 1,000,000 bytes.
  36 .macro pad_sections2 pad
  37   // 10x \pad
  38   .section p0\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad; .long 1
  39   .section p1\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad; .long 1
  40   .section p2\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad; .long 1
  41   .section p3\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad; .long 1
  42   .section p4\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad; .long 1
  43 .endm
  44
  45 .macro pad_sections pad
  46   // 20x \pad
  47   pad_sections2 \pad\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad\pad
  48 .endm
  49
  50 // 1000x 'a'
  51 pad_sections aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
  52
  53
  54 // /1000029 == 4 + 10 + (5 * (2 + (20 * 10 * 1000) + 1))
  55 //             v   |     |    v    ~~~~~~~~~~~~~~    v
  56 //    table size   v     v   "p0"        pad         NUL separator
  57 //     "s12345678\0"     # of pad sections
  58 //
  59 // CHECK:   Section {
  60 // CHECK:     Number: 9
  61 // CHECK:     Name: seven_digit (2F 31 30 30 30 30 32 39)
  62 // CHECK:   }
  63 .section seven_digit; .long 1
  64
  65
  66 // Generate padding sections to increase the string table size to at least
  67 // 10,000,000 bytes.
  68 .macro pad_sections_ex pad
  69   // 9x \pad
  70   pad_sections \pad\pad\pad\pad\pad\pad\pad\pad\pad
  71 .endm
  72
  73 // 1000x 'a'
  74 pad_sections_ex aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
  75
  76
  77 // //AAmJa4 == 1000029 + 12 + (5 * (2 + (9 * 20 * 10 * 1000) + 1)) == 38*64^3 + 9*64^2 + 26*64 + 56
  78 //             v         |     |    v    ~~~~~~~~~~~~~~~~~~    v
  79 // seven_digit offset    v     v   "p0"         pad            NUL seperator
  80 //         "seven_digit\0"     # of pad sections
  81 //
  82 // "2F 2F 41 41 6D 4A 61 34" is "//AAmJa4", which decodes to "0 0 38 9 26 56".
  83 //
  84 // CHECK:   Section {
  85 // CHECK:     Number: 15
  86 // CHECK:     Name: double_slash (2F 2F 41 41 6D 4A 61 34)
  87 // CHECK:   }
  88 .section double_slash; .long 1