[1.7] binutils-2.19.51-1: ld -r bug ?

[Christian Franke <Christian dot Franke at t-online dot de>]

Testing build of grub 1.97 beta on Cygwin 1.7, I found that the grub 
.mod files are much larger than on 1.5. The modules are build by 'ld -r' 
(and later converted to ELF).

The root of the problem is that the binutils-2.19.51-1 ld behavior 
differs from previous 1.5 binutils. The new ld increases the size of 
each segment by the size of the previous segment. Bug?


Testcase:

$ cat segm.c
void text() { __asm__(".space 104"); }
char       data[256] = "DATA";
const char rdata[16] = "RDATA";

$ gcc -c segm.c


cygwin-1.5:
$ cygcheck -f /bin/ld
binutils-20080624-2

$ ld -r -o segm-r5.o segm.o


cygwin-1.7:
$ cygcheck -f /bin/ld
binutils-2.19.51-1

$ ld -r -o segm-r7.o segm.o


$ size segm.o segm-*.o
  text    data     bss     dec     hex filename
   128     256       0     384     180 segm.o
   128     256       0     384     180 segm-r5.o
   512     384     400    1296     510 segm-r7.o


$ objdump -s segm-r*.o

segm-r5.o:     file format pe-i386

Contents of section .text:
0000 5589e500 00000000 00000000 00000000  U...............
...
0060 00000000 00000000 0000005d c3909090  ...........]....
Contents of section .data:
0080 44415441 00000000 00000000 00000000  DATA............
...
0170 00000000 00000000 00000000 00000000  ................
Contents of section .rdata:
0180 52444154 41000000 00000000 00000000  RDATA...........

segm-r7.o:     file format pe-i386

Contents of section .text:
0000 5589e500 00000000 00000000 00000000  U...............
...
0060 00000000 00000000 0000005d c3909090  ...........]....
Contents of section .data:
0000 00000000 00000000 00000000 00000000  ................
...
0080 44415441 00000000 00000000 00000000  DATA............
...
0170 00000000 00000000 00000000 00000000  ................
Contents of section .rdata:
0000 00000000 00000000 00000000 00000000  ................
...
0180 52444154 41000000 00000000 00000000  RDATA...........


There are no related changes in the builtin linker scripts (ld --verbose 
-r).

Christian


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