Incorrect layout when there is a forward reference in a dot assignment

[parth-07]

We have incorrect layout when there is a forward reference in a dot assignment.

Reproducer:

#!/usr/bin/env bash

cat >1.c <<\EOF
int foo() { return 1; }

int val = 3;
EOF


cat > script.t << '!'
SECTIONS {
  . = u;
  .text : { *(.text*) }
  .data : { *(.data*) }
  .comment : { *(.comment*) }
  u = 0x3000;
}
!


LDs=(ld.eld ld.lld aarch64-none-elf-ld.bfd)
SFs=(eld lld bfd)

clang -o 1.o --target=aarch64-unknown-elf 1.c -c -ffunction-sections

for i in "${!SFs[@]}"; do
  ${LDs[$i]} -o 1.${SFs[$i]}.out 1.o -T script.t -Map 1.${SFs[$i]}.map.txt
done

Running llvm-readelf -S 1.eld.out outputs:

There are 7 section headers, starting at offset 0x1280:

Section Headers:
  [Nr] Name              Type            Address          Off    Size   ES Flg Lk Inf Al
  [ 0]                   NULL            0000000000000000 000000 000000 00      0   0  0
  [ 1] .text             PROGBITS        0000000000000000 001000 000008 00  AX  0   0  4
  [ 2] .data             PROGBITS        0000000000000008 001008 000004 00  WA  0   0  4
  [ 3] .comment          PROGBITS        0000000000000000 00100c 0000ce 01  MS  0   0  1
  [ 4] .shstrtab         STRTAB          0000000000000000 0010da 000030 00      0   0  1
  [ 5] .symtab           SYMTAB          0000000000000000 001110 000108 18      6   8  8
  [ 6] .strtab           STRTAB          0000000000000000 001218 00002d 00      0   0  1

The address of .text section should be 0x3000 instead of 0x1000.