[RTEMS Project] #3883: Trace linker is broken on small-data area targets

[RTEMS trac]

#3883: Trace linker is broken on small-data area targets
------------------------------+---------------------------
  Reporter:  Sebastian Huber  |      Owner:  Needs Funding
      Type:  defect           |     Status:  assigned
  Priority:  normal           |  Milestone:  Indefinite
 Component:  tool             |    Version:  5
  Severity:  normal           |   Keywords:
Blocked By:                   |   Blocking:
------------------------------+---------------------------
 The trace linker generates some data, e.g. `__rtld_trace_names`. The
 arrays are not declared in a header file as arrays of unspecified size.
 So, in rtems-trace-buffer-vars.c the compiler assumes that the size one
 weakly defined defaults reside in the small-data area. This leads to
 linker errors with the strong definitions:
 {{{
 Waf: Entering directory `/scratch/git-rtems-examples/build/powerpc-
 rtems5-qoriq_e6500_32'
 [22/29] Processing rtrace: build/powerpc-
 rtems5-qoriq_e6500_32/filesystem/fat_ramdisk/init.c.6.o build/powerpc-
 rtems5-qoriq_e6500_32/filesystem/fat_ramdisk/fs-root-tar.c.6.o -> build
 /powerpc-rtems5-qoriq_e6500_32/filesystem/fat_ramdisk/fat_ramdisk.texe
 /opt/rtems/5/bin/powerpc-rtems5-gcc: /opt/rtems/5/lib64/gcc/powerpc-
 rtems5/7.5.0/../../../../powerpc-rtems5/bin/ld: /opt/rtems/5/powerpc-
 rtems5/qoriq_e6500_32/lib/librtemscpu.a(rtems-trace-buffer-vars.o): the
 target (__rtld_trace_names) of a R_PPC_SDAREL16 relocation is in the wrong
 output section (.data)
 /opt/rtems/5/bin/powerpc-rtems5-gcc: /opt/rtems/5/powerpc-
 rtems5/qoriq_e6500_32/lib/librtemscpu.a(rtems-trace-buffer-vars.o): in
 function `rtems_trace_names':
 /opt/rtems/5/bin/powerpc-rtems5-gcc: /home/EB/sebastian_h/git-
 rtems-5/c/src/../../cpukit/libmisc/capture/rtems-trace-buffer-
 vars.c:51:(.text.rtems_trace_names+0x2): relocation truncated to fit:
 R_PPC_SDAREL16 against symbol `__rtld_trace_names' defined in
 .data.__rtld_trace_names section in /tmp/ccu6uaaa.o
 /opt/rtems/5/bin/powerpc-rtems5-gcc: /opt/rtems/5/lib64/gcc/powerpc-
 rtems5/7.5.0/../../../../powerpc-rtems5/bin/ld: /opt/rtems/5/powerpc-
 rtems5/qoriq_e6500_32/lib/librtemscpu.a(rtems-trace-buffer-vars.o): the
 target (__rtld_trace_signatures) of a R_PPC_SDAREL16 relocation is in the
 wrong output section (.rodata)
 /opt/rtems/5/bin/powerpc-rtems5-gcc: /opt/rtems/5/powerpc-
 rtems5/qoriq_e6500_32/lib/librtemscpu.a(rtems-trace-buffer-vars.o): in
 function `rtems_trace_signatures':
 /opt/rtems/5/bin/powerpc-rtems5-gcc: /home/EB/sebastian_h/git-
 rtems-5/c/src/../../cpukit/libmisc/capture/rtems-trace-buffer-
 vars.c:81:(.text.rtems_trace_signatures+0x2): relocation truncated to fit:
 R_PPC_SDAREL16 against symbol `__rtld_trace_signatures' defined in
 .rodata.__rtld_trace_signatures section in /tmp/ccu6uaaa.o
 }}}

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Ticket URL: <http://devel.rtems.org/ticket/3883>
RTEMS Project <http://www.rtems.org/>
RTEMS Project