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[1] fixes clash of TLS variables on ARC and since LD now calculates relocations
a bit different now we need to update dynamic loader as well otherwise relocs
will be calculated improperly.
Note this is an ABI change and should go in-line with corresponding ARC tools.
That said either arc-2018.09 (to be released in few weeks) or the next version of upstream
Binutils (2.32) are required for normal TLS work on ARC.
Testcase:
----------------------------------8<-------------------------------
#include <stdio.h>
int foo3(void);
int foo1(void);
#ifdef _SHARED
int foo1(){
static __thread int val3=1;
val3 += 2;
return val3;
}
#elif _SHARED2
int foo3(){
static __thread int val2=0;
val2 += 2;
return val2;
}
#else
int main(){
printf("foo1 = %d \n", foo1());
printf("foo3 = %d \n", foo3());
return 0;
}
#endif
--------------------------------->8---------------------------------------
The result shoud be:
----8<----
foo1 = 3
foo3 = 2
---->8----
Commands to build artefacts:
----------------------------------------8<-------------------------------
arc-linux-gcc -fPIE -ffunction-sections -fdata-sections -pthread -Os \
-fPIC -o testtls.o -D_SHARED -c tst.c
arc-linux-gcc -fPIE -ffunction-sections -fdata-sections -pthread -Os \
-fPIC -o testtls2.o -D_SHARED2 -c tst.c
arc-linux-gcc -shared -o libtesttls.so testtls.o testtls2.o -lm -Os
arc-linux-gcc tst.c -o tst.out -L./ -ltesttls -Os -fPIE
--------------------------------->8---------------------------------------
Add path to libtesttls.so file to LD_LIBRARY_PATH before runnig
tst.out application.
[1] https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=714e9a954a2e4123dcb26bb8da850e1344de4f5f
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Evgeniy Didin <didin@synopsys.com>
CC: Cupertino Miranda <cmiranda@synopsys.com>
CC: Vineet Gupta <vgupta@synopsys.com>
CC: Waldemar Brodkorb <wbx@uclibc-ng.org>
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Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
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The R_ARC_NONE relocation is generated when --gc-sections, used by the
compile time linker, removes some sections. This is completely normal,
and we can see that all other targets (based on random sampling) have
support for R_*_NONE relocations (named for each target).
Handling R_ARC_NONE involves doing nothing with it, which is nice and
easy.
Signed-off-by: Andrew Burgess <andrew.burgess@embecosm.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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This is next gen Instruction Set Architecture from Synopsys and basis
for the ARC HS family of processors.
http://www.synopsys.com/dw/ipdir.php?ds=arc-hs38-processor&elq_mid=5732&elq_cid=458802
http://www.synopsys.com/IP/ProcessorIP/ARCProcessors/arc-hs/Pages/default.aspx
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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Use spaces instead of tabs in the table to accomodate different tab
settings.
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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