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[davidm@napali.hpl.hp.com: Re: [PATCH] i386 vsyscall DSOimplementation]

• From: "H. J. Lu" <hjl at lucon dot org>
• To: binutils at sources dot redhat dot com
• Date: Fri, 13 Jun 2003 20:21:58 -0700
• Subject: [davidm@napali.hpl.hp.com: Re: [PATCH] i386 vsyscall DSOimplementation]

Can someone comment on it?H.J.-------- Forwarded message from David Mosberger <davidm@napali.hpl.hp.com> -----Delivered-To: hjl@localhost.lucon.orgFrom: David Mosberger <davidm@napali.hpl.hp.com>Date: Fri, 13 Jun 2003 20:02:43 -0700To: hjl@lucon.orgCc: Roland McGrath <roland@redhat.com>, davidm@hpl.hp.comSubject: Re: [PATCH] i386 vsyscall DSO implementationX-Mailer: VM 7.07 under Emacs 21.2.1Reply-To: davidm@hpl.hp.comX-URL:http://www.hpl.hp.com/personal/David_Mosberger/HJ,Would you be OK with getting this bug fix into the binutils CVS?Without the attached patch, segment-relative relocations do not workcorrectly if the target symbol (effective address) is in a differentsection than the relocation.Here is a test case:$ cat t.S        .proc startstart:  .prologue        .altrp b6        br.ret.sptk b6        .endp start$ cat t.ldsSECTIONS {        . = SIZEOF_HEADERS;        .IA_64.unwind_info : { *(.IA_64.unwind_info) } :dat        .IA_64.unwind : { *(.IA_64.unwind*) } :dat :unw        . = 0xa0000;        .text : { *(.text) } :txt}PHDRS {  dat PT_LOAD FILEHDR PHDRS FLAGS(4);  txt PT_LOAD FLAGS(1);  unw 0x70000001;}$ gcc -c t.c$ ld -static -Tt.lds t.o$ readelf -u a.out | fgrep '<'<>: [0x0-0x10], info at +0xe8With the patch applied, the last command instead yields the desiredvalues:$ readelf -u a.out | fgrep '<'<start>: [0xa0000-0xa0010], info at +0xe8--david-------------------------------------------------------From: Roland McGrath <roland@redhat.com>To: davidm@hpl.hp.comSubject: Re: [PATCH] i386 vsyscall DSO implementationDate: Fri, 13 Jun 2003 19:03:44 -0700I'm calling it an ld bug.*** bfd/elfxx-ia64.c.~1.83.~--- bfd/elfxx-ia64.c****************** 4325,4331 ****                {                  int i;                  for (i = m->count - 1; i >= 0; i--)!                   if (m->sections[i] == sym_sec->output_section)                      break;                  if (i >= 0)                    break;--- 4325,4331 ----                {                  int i;                  for (i = m->count - 1; i >= 0; i--)!                   if (m->sections[i] == input_section->output_section)                      break;                  if (i >= 0)                    break;----- End forwarded message -----

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