test/ELF/linkerscript/overlay.test

# REQUIRES: x86
# RUN: rm -rf %t && split-file %s %t && cd %t
# RUN: llvm-mc -filetype=obj -triple=x86_64 a.s -o a.o
# RUN: ld.lld a.o -T a.t -o a

## Here we check that can handle OVERLAY which will produce sections
## .out.big and .out.small with the same starting VAs, but different LMAs.
## Section .big is larger than .small, we check that placing of section
## .text does not cause overlapping error and that
## .text's VA is 0x1000 + max(sizeof(.out.big), sizeof(.out.small)).

# RUN: llvm-readelf --sections -l a | FileCheck %s

# CHECK:      Name       Type     Address          Off    Size
# CHECK:      .big1      PROGBITS 0000000000001000 001000 000008
# CHECK-NEXT: .small1    PROGBITS 0000000000001000 002000 000004
# CHECK-NEXT: .small2    PROGBITS 0000000000001008 002008 000004
# CHECK-NEXT: .big2      PROGBITS 0000000000001008 003008 000008
# CHECK-NEXT: .small3    PROGBITS 0000000000001010 003010 000004
# CHECK-NEXT: .big3      PROGBITS 0000000000001014 003014 000008
# CHECK-NEXT: .text      PROGBITS 0000000000001024 003024 000001

# CHECK:      Program Headers:
# CHECK:      Type Offset   VirtAddr           PhysAddr           FileSiz  MemSiz   Flg Align
# CHECK-NEXT: LOAD 0x001000 0x0000000000001000 0x0000000000001000 0x000008 0x000008 R   0x1000
# CHECK-NEXT: LOAD 0x002000 0x0000000000001000 0x0000000000001008 0x000004 0x000004 R   0x1000
# CHECK-NEXT: LOAD 0x002008 0x0000000000001008 0x0000000000002008 0x000004 0x000004 R   0x1000
# CHECK-NEXT: LOAD 0x003008 0x0000000000001008 0x000000000000200c 0x000008 0x000008 R   0x1000
## FIXME Fix p_paddr when the first section in an overlay is empty and discarded.
# CHECK-NEXT: LOAD 0x003010 0x0000000000001010 0x0000000000000000 0x000004 0x000004 R   0x1000
# CHECK-NEXT: LOAD 0x003014 0x0000000000001014 0x0000000000000004 0x000008 0x000008 R   0x1000
# CHECK-NEXT: LOAD 0x003024 0x0000000000001024 0x0000000000000014 0x000001 0x000001 R E 0x1000

# RUN: not ld.lld a.o -T err1.t 2>&1 | FileCheck %s --check-prefix=ERR1 --match-full-lines --strict-whitespace
#      ERR1:{{.*}}error: err1.t:3: { expected, but got 0x3000
# ERR1-NEXT:>>>     .out.aaa 0x3000 : { *(.aaa) }
# ERR1-NEXT:>>>              ^

# RUN: not ld.lld a.o -T err2.t 2>&1 | FileCheck %s --check-prefix=ERR2 --match-full-lines --strict-whitespace
#      ERR2:{{.*}}error: err2.t:{{.*}}: { expected, but got AX
# ERR2-NEXT:>>>     .out.aaa { *(.aaa) } > AX AT>FLASH
# ERR2-NEXT:>>>                            ^

#--- a.s
.globl _start
_start:
  nop

.section .small1, "a"; .long 0
.section .big1, "a"; .quad 1

.section .small2, "a"; .long 0
.section .big2, "a"; .quad 1

.section .small3, "a"; .long 0
.section .big3, "a"; .quad 1

#--- a.t
SECTIONS {
  OVERLAY 0x1000 : AT( 0x1000 ) {
    .big1 { *(.big1) }
    .small1 { *(.small1) }
  }
  OVERLAY 0x1008 : AT (0x2008) {
    .small2 { *(.small2) }
    .big2 { *(.big2) }
  }
  OVERLAY . : AT (0x2014) {
    .empty3 { *(.empty3) }
    .small3 { *(.small3) }
    .big3 { *(.big3) }
  }
  .text : { *(.text) }
}

#--- err1.t
SECTIONS {
  OVERLAY 0x1000 : AT ( 0x2000 ) {
    .out.aaa 0x3000 : { *(.aaa) }
  }
}

#--- err2.t
MEMORY {
  AX (ax)    : ORIGIN = 0x3000, LENGTH = 0x4000
}
SECTIONS {
  OVERLAY 0x1000 : AT ( 0x2000 ) {
    .out.aaa { *(.aaa) } > AX AT>FLASH
  }
}