[Bug binutils/20984] New: different DOT value in the 'same' place

[pangbw at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=20984

Bug ID: 20984
   Summary: different DOT value in the 'same' place
   Product: binutils
   Version: 2.22
Status: UNCONFIRMED
  Severity: normal
  Priority: P2
 Component: binutils
  Assignee: unassigned at sourceware dot org
  Reporter: pangbw at gmail dot com
  Target Milestone: ---

Created attachment 9708
  --> https://sourceware.org/bugzilla/attachment.cgi?id=9708&action=edit
linker script

Steps to show the issue:
1. cat t.c

#include 

extern char tdata_size [];
extern char tdata_tbss_size [];
extern char tdata_tbss_size2 [];
extern char tdata_tbss_size3 [];

__thread int tls = 0;

int main()
{
  printf("Hello DOT. %d %d %d %d\n",
 tdata_size, tdata_tbss_size, tdata_tbss_size2, tdata_tbss_size3);
  return 0;
}

2. tdata_size, tdata_tbss_size, tdata_tbss_size2 and tdata_tbss_size3 are
defined in the attached link script x.link:

tdata_start = .;
  .tdata  : { *(.tdata .tdata.* .gnu.linkonce.td.*) }
  tdata_size = . - tdata_start;
  .tbss   : {
  *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon)
  tbss_end = .;
  }
  tdata_tbss_size = . - tdata_start;
  tdata_tbss_size2 = tbss_end - tdata_start;
  tdata_tbss_size3 = SIZEOF(.tdata) + SIZEOF(.tbss);


3. gcc -static t.c -Wl,-T x.link
4. ./a.out
Hello DOT. 34 34 90 88

I got this result on Ubuntu precise (12.04.5 LTS), also got the slightly
different result on another different Linux host.

I can understand the difference between tdata_tbss_size2 and tdata_tbss_size3
is caused by alignment, but why tdata_tbss_size is different than
tdata_tbss_size2?

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[Bug gas/1070] Assembler error: too many positional arguments

[amodra at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=1070

Alan Modra  changed:

   What|Removed |Added

 Target|powerpc-linux   |
 Status|REOPENED|RESOLVED
 CC||amodra at gmail dot com
   Host|i686-host_pc-linux-gnu  |
 Resolution|--- |WONTFIX

--- Comment #9 from Alan Modra  ---
I doubt anyone cares enough to spend effort on fixing the issues raised in
comment #8.  Re comment #7, Nick's patches did fix the original testcase.

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[Bug binutils/835] Fails to build in 64bit mode

[amodra at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=835

Alan Modra  changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 CC||amodra at gmail dot com
 Resolution|--- |FIXED

--- Comment #2 from Alan Modra  ---
I think this was fixed with git commit d6867a7559 or perhaps even earlier.

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[Bug binutils/20984] different DOT value in the 'same' place

[amodra at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=20984

Alan Modra  changed:

   What|Removed |Added

 Status|UNCONFIRMED |RESOLVED
 CC||amodra at gmail dot com
 Resolution|--- |INVALID

--- Comment #1 from Alan Modra  ---
Not a bug.  .tbss effectively has zero size in the memory image.  So sections
and symbols following .tbss are placed at the same address as .tbss.

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bug-binutils@gnu.org

[amodra at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=11829

Alan Modra  changed:

   What|Removed |Added

 Target|powerpc-unknown-eabi|
   Host|Sourcery G++ Lite for   |
   |Windows, running under  |
   |Cygwin  |
   Severity|critical|enhancement

--- Comment #7 from Alan Modra  ---
Dropping priority since this bug report seems to mostly be about lack of
documentation.  Also not target specific.

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