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Date: | Sat, 12 Sep 2009 00:00:31 +0200 |
From: | Christian Franke <Christian DOT Franke AT t-online DOT de> |
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To: | Cygwin <cygwin AT cygwin DOT com> |
Subject: | [1.7] binutils-2.19.51-1: ld -r bug ? |
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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 -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
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