lld/test/ELF/aarch64-cortex-a53-843419-address.s

   1 // REQUIRES: aarch64
   2 // RUN: llvm-mc -filetype=obj -triple=aarch64-none-linux %s -o %t.o
   3 // RUN: echo "SECTIONS { \
   4 // RUN:          .text : { *(.text) *(.text.*) *(.newisd) } \
   5 // RUN:          .text2 : { *.(newos) } \
   6 // RUN:          .data : { *(.data) } }" > %t.script
   7 // RUN: ld.lld --script %t.script -fix-cortex-a53-843419 -verbose %t.o -o %t2 2>&1 \
   8 // RUN:   | FileCheck -check-prefix=CHECK-PRINT %s
   9 // RUN: llvm-objdump --no-print-imm-hex --triple=aarch64-linux-gnu -d %t2 | FileCheck %s
  10
  11 // Test cases for Cortex-A53 Erratum 843419 that involve interactions
  12 // between the generated patches and the address of sections.
  13
  14 // See ARM-EPM-048406 Cortex_A53_MPCore_Software_Developers_Errata_Notice.pdf
  15 // for full erratum details.
  16 // In Summary
  17 // 1.)
  18 // ADRP (0xff8 or 0xffc).
  19 // 2.)
  20 // - load or store single register or either integer or vector registers.
  21 // - STP or STNP of either vector or vector registers.
  22 // - Advanced SIMD ST1 store instruction.
  23 // - Must not write Rn.
  24 // 3.) optional instruction, can't be a branch, must not write Rn, may read Rn.
  25 // 4.) A load or store instruction from the Load/Store register unsigned
  26 // immediate class using Rn as the base register.
  27
  28 // An aarch64 section can contain ranges of literal data embedded within the
  29 // code, these ranges are encoded with mapping symbols. This tests that we
  30 // can match the erratum sequence in code, but not data.
  31 // - We can handle more than one patch per code range (denoted by mapping
  32 //   symbols).
  33 // - We can handle a patch in more than range of code, with literal data
  34 //   inbetween.
  35 // - We can handle redundant mapping symbols (two or more consecutive mapping
  36 //   symbols with the same type).
  37 // - We can ignore erratum sequences in multiple literal data ranges.
  38
  39 // CHECK-PRINT: detected cortex-a53-843419 erratum sequence starting at FF8 in unpatched output.
  40 // CHECK: <t3_ff8_ldr>:
  41 // CHECK-NEXT:      ff8:        d0000020        adrp    x0, 0x6000
  42 // CHECK-NEXT:      ffc:        f9400021        ldr             x1, [x1]
  43 // CHECK-NEXT:     1000:        14000ff9        b       0x4fe4
  44 // CHECK-NEXT:     1004:        d65f03c0        ret
  45         .section .text.01, "ax", %progbits
  46         .balign 4096
  47         .space 4096 - 8
  48         .globl t3_ff8_ldr
  49         .type t3_ff8_ldr, %function
  50 t3_ff8_ldr:
  51         adrp x0, dat
  52         ldr x1, [x1, #0]
  53         ldr x0, [x0, :got_lo12:dat]
  54         ret
  55
  56         // create a redundant mapping symbol as we are already in a $x range
  57         // some object producers unconditionally generate a mapping symbol on
  58         // every symbol so we need to handle the case of $x $x.
  59         .local $x.999
  60 $x.999:
  61 // CHECK-PRINT-NEXT: detected cortex-a53-843419 erratum sequence starting at 1FFC in unpatched output.
  62 // CHECK: <t3_ffc_ldrsimd>:
  63 // CHECK-NEXT:     1ffc:        b0000020        adrp    x0, 0x6000
  64 // CHECK-NEXT:     2000:        bd400021        ldr             s1, [x1]
  65 // CHECK-NEXT:     2004:        14000bfa        b       0x4fec
  66 // CHECK-NEXT:     2008:        d65f03c0        ret
  67         .globl t3_ffc_ldrsimd
  68         .type t3_ffc_ldrsimd, %function
  69         .space 4096 - 12
  70 t3_ffc_ldrsimd:
  71         adrp x0, dat
  72         ldr s1, [x1, #0]
  73         ldr x2, [x0, :got_lo12:dat]
  74         ret
  75
  76 // Inline data containing bit pattern of erratum sequence, expect no patch.
  77         .globl t3_ffc_ldralldata
  78         .type t3_ff8_ldralldata, %function
  79         .space 4096 - 20
  80 t3_ff8_ldralldata:
  81         // 0x90000000 = adrp x0, #0
  82         .byte 0x00
  83         .byte 0x00
  84         .byte 0x00
  85         .byte 0x90
  86         // 0xf9400021 = ldr x1, [x1]
  87         .byte 0x21
  88         .byte 0x00
  89         .byte 0x40
  90         .byte 0xf9
  91         // 0xf9400000 = ldr x0, [x0]
  92         .byte 0x00
  93         .byte 0x00
  94         .byte 0x40
  95         .byte 0xf9
  96         // Check that we can recognise the erratum sequence post literal data.
  97
  98 // CHECK-PRINT-NEXT: detected cortex-a53-843419 erratum sequence starting at 3FF8 in unpatched output.
  99 // CHECK: <t3_ffc_ldr>:
 100 // CHECK-NEXT:     3ff8:        f0000000        adrp    x0, 0x6000
 101 // CHECK-NEXT:     3ffc:        f9400021        ldr             x1, [x1]
 102 // CHECK-NEXT:     4000:        140003fd        b       0x4ff4
 103 // CHECK-NEXT:     4004:        d65f03c0        ret
 104         .space 4096 - 12
 105         .globl t3_ffc_ldr
 106         .type t3_ffc_ldr, %function
 107  t3_ffc_ldr:
 108         adrp x0, dat
 109         ldr x1, [x1, #0]
 110         ldr x0, [x0, :got_lo12:dat]
 111         ret
 112
 113 // CHECK: <__CortexA53843419_1000>:
 114 // CHECK-NEXT:     4fe4:        f9400c00        ldr     x0, [x0, #24]
 115 // CHECK-NEXT:     4fe8:        17fff007        b       0x1004
 116 // CHECK: <__CortexA53843419_2004>:
 117 // CHECK-NEXT:     4fec:        f9400c02        ldr     x2, [x0, #24]
 118 // CHECK-NEXT:     4ff0:        17fff406        b       0x2008
 119 // CHECK: <__CortexA53843419_4000>:
 120 // CHECK-NEXT:     4ff4:        f9400c00        ldr     x0, [x0, #24]
 121 // CHECK-NEXT:     4ff8:        17fffc03        b       0x4004
 122
 123         .section .text.02, "ax", %progbits
 124         .space 4096 - 36
 125
 126         // Start a new InputSectionDescription (see Linker Script) so the
 127         // start address will be affected by any patches added to previous
 128         // InputSectionDescription.
 129
 130 // CHECK-PRINT-NEXT: detected cortex-a53-843419 erratum sequence starting at 4FFC in unpatched output
 131 // CHECK: <t3_ffc_str>:
 132 // CHECK-NEXT:     4ffc:        d0000000        adrp    x0, 0x6000
 133 // CHECK-NEXT:     5000:        f9000021        str             x1, [x1]
 134 // CHECK-NEXT:     5004:        140003fb        b       0x5ff0
 135 // CHECK-NEXT:     5008:        d65f03c0        ret
 136
 137         .section .newisd, "ax", %progbits
 138         .globl t3_ffc_str
 139         .type t3_ffc_str, %function
 140 t3_ffc_str:
 141         adrp x0, dat
 142         str x1, [x1, #0]
 143         ldr x0, [x0, :got_lo12:dat]
 144         ret
 145         .space 4096 - 28
 146
 147 // CHECK: <__CortexA53843419_5004>:
 148 // CHECK-NEXT:     5ff0:        f9400c00        ldr     x0, [x0, #24]
 149 // CHECK-NEXT:     5ff4:        17fffc05        b       0x5008
 150
 151         // Start a new OutputSection (see Linker Script) so the
 152         // start address will be affected by any patches added to previous
 153         // InputSectionDescription.
 154
 155 //CHECK-PRINT-NEXT: detected cortex-a53-843419 erratum sequence starting at 5FF8 in unpatched output
 156 // CHECK: <t3_ff8_str>:
 157 // CHECK-NEXT:     5ff8:        b0000000        adrp    x0, 0x6000
 158 // CHECK-NEXT:     5ffc:        f9000021        str             x1, [x1]
 159 // CHECK-NEXT:     6000:        14000003        b       0x600c
 160 // CHECK-NEXT:     6004:        d65f03c0        ret
 161
 162         .section .newos, "ax", %progbits
 163         .globl t3_ff8_str
 164         .type t3_ff8_str, %function
 165 t3_ff8_str:
 166         adrp x0, dat
 167         str x1, [x1, #0]
 168         ldr x0, [x0, :got_lo12:dat]
 169         ret
 170         .globl _start
 171         .type _start, %function
 172 _start:
 173         ret
 174
 175 // CHECK: <__CortexA53843419_6000>:
 176 // CHECK-NEXT:     600c:        f9400c00        ldr     x0, [x0, #24]
 177 // CHECK-NEXT:     6010:        17fffffd        b       0x6004
 178
 179         .data
 180         .globl dat
 181 dat:    .word 0