v850 tool chain broken with -fdata-sections

[Sebastian Huber]

Hello,

I noticed a problem with the latest v850 tool chain which uses 
-fdata-sections for Newlib:

gmake[1]: Entering directory 
'/build/git-build/b-all-v850-5/v850-rtems5/c/v850e1sim/testsuites/samples'
v850-rtems5-gcc  -mv850e1 -O2 -g -ffunction-sections -fdata-sections 
-Wall -Wmissing-prototypes -Wimplicit-function-declaration 
-Wstrict-prototypes -Wnested-externs -Wl,-Map,map.txt 
-B./../../lib/libbsp/v850/gdbv850sim 
-B/home/EB/sebastian_h/git-rtems-5/bsps/v850/gdbv850sim/start -specs 
bsp_specs -qrtems -L./../../cpukit 
-L/home/EB/sebastian_h/git-rtems-5/bsps/v850/shared/start 
-Wl,--wrap=printf -Wl,--wrap=puts -Wl,--wrap=putchar -Wl,--gc-sections 
-o base_sp.exe base_sp/base_sp-init.o base_sp/base_sp-apptask.o 
./../../lib/libbsp/v850/gdbv850sim/librtemsbsp.a 
./../../cpukit/librtemscpu.a
/build/rtems/5/lib/gcc/v850-rtems5/7.3.0/../../../../v850-rtems5/bin/ld: 
/build/rtems/5/lib/gcc/v850-rtems5/7.3.0/../../../../v850-rtems5/lib/v850e/libc.a(lib_a-exit.o): 
in function `exit':
/scratch/git-rtems-source-builder/rtems/build/v850-rtems5-gcc-7.3.0-newlib-08eab6396f678cf5e5968acaed0bae9fd129983b-x86_64-linux-gnu-1/build/v850-rtems5/v850e/newlib/libc/stdlib/../../../../../../gcc-7.3.0/newlib/libc/stdlib/exit.c:62:(.text.exit+0xe): 
relocation truncated to fit: R_V810_GPWLO_1 against symbol 
`_global_impure_ptr' defined in .rodata._global_impure_ptr section in 
/build/rtems/5/lib/gcc/v850-rtems5/7.3.0/../../../../v850-rtems5/lib/v850e/libc.a(lib_a-impure.o)
/build/rtems/5/lib/gcc/v850-rtems5/7.3.0/../../../../v850-rtems5/bin/ld: 
/build/rtems/5/lib/gcc/v850-rtems5/7.3.0/../../../../v850-rtems5/lib/v850e/libc.a(lib_a-reent.o): 
in function `reclaim_reent':
/scratch/git-rtems-source-builder/rtems/build/v850-rtems5-gcc-7.3.0-newlib-08eab6396f678cf5e5968acaed0bae9fd129983b-x86_64-linux-gnu-1/build/v850-rtems5/v850e/newlib/libc/reent/../../../../../../gcc-7.3.0/newlib/libc/reent/reent.c:46:(.text._reclaim_reent+0x6): 
relocation truncated to fit: R_V810_GPWLO_1 against symbol `_impure_ptr' 
defined in .data._impure_ptr section in 
/build/rtems/5/lib/gcc/v850-rtems5/7.3.0/../../../../v850-rtems5/lib/v850e/libc.a(lib_a-impure.o)
collect2: error: ld returned 1 exit status
gmake[1]: *** [Makefile:733: base_sp.exe] Error 1
gmake[1]: Leaving directory 
'/build/git-build/b-all-v850-5/v850-rtems5/c/v850e1sim/testsuites/samples'

I guess this is somehow related to this definition in Newlib:

#ifdef __v850
#define __ATTRIBUTE_IMPURE_PTR__ __attribute__((__sda__))
#endif

User of _global_impure_ptr thinks it is in the small-data area, but 
definition is elsewhere.

-- 
Sebastian Huber, embedded brains GmbH

Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone   : +49 89 189 47 41-16
Fax     : +49 89 189 47 41-09
E-Mail  : sebastian.huber at embedded-brains.de
PGP     : Public key available on request.

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