[Bug ld/25784] New: [ld] Reject addresses outside [0,2**32) for ELFCLASS32

[i at maskray dot me]

https://sourceware.org/bugzilla/show_bug.cgi?id=25784

            Bug ID: 25784
           Summary: [ld] Reject addresses outside [0,2**32) for ELFCLASS32
           Product: binutils
           Version: 2.35 (HEAD)
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: i at maskray dot me
  Target Milestone: ---

cat > a.lds <<e
 SECTIONS {
   . = 0xffffffff80000000;
   . += 0x100000;
   _text = .;
 }
e
as --32 /dev/null -o a.o
ld.bfd -m elf_i386 -T a.lds a.o -M


Memory Configuration                                                       

Name             Origin             Length             Attributes          
*default*        0x0000000000000000 0xffffffffffffffff

Linker script and memory map                                               

                0xffffffff80000000                . = 0xffffffff80000000
                0xffffffff80100000                . = (. + 0x100000)       
                0xffffffff80100000                _text = .
LOAD a.o                                                                   
OUTPUT(a.out elf32-i386)                                                   

.text           0xffffffff80100000        0x0
 .text          0xffffffff80100000        0x0 a.o                          
...


0xffffffff80000000 will be truncated to 0x80000000.
Similarly,
0x0fffffff80000000 will be truncated to 0x80000000.

I think rejecting such addresses may be more reasonable.

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