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Relocation error for FT benchmark in Class C #177

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blackgeorge-boom opened this issue Jul 20, 2022 · 8 comments
Open

Relocation error for FT benchmark in Class C #177

blackgeorge-boom opened this issue Jul 20, 2022 · 8 comments
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@compor
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FT Benchmark Unif...

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@blackgeorge-boom
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Using: -mcmodel=large:

appft.c:75: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
@blackgeorge-boom blackgeorge-boom added the bug Something isn't working label Jul 20, 2022
@compor
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compor commented Jul 20, 2022

Combinations tried in relation to musl libc:

  • -mcmodel=medium crashes clang during compilation of musl, thus not tested in relation to ft.
  • -mcmodel=large produces the aforementioned relocation error during linking, but unsure if this also occurs for x86_64. musl builds ok.

@compor compor self-assigned this Apr 5, 2023
@blackgeorge-boom
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Related: ssrg-vt/popcorn-compiler#10

@compor
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compor commented Apr 5, 2023

potentially relevant: google/ExoPlayer#9933

@compor
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compor commented Apr 6, 2023

An update:

  • -Bsymbolic linker flag didn't work
  • -mcmodel=large compiler flag didn't work

These were both used for building musl libc and ft.

I also tried -fno-tls-model to no effect, just in case it is related.

@compor
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compor commented Apr 6, 2023 •
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However,

Adding -fPIC to the CFLAGS in unifico's common.mk makefile reduced the relocation errors, from
(this requires a clean rebuild in between changes in the makefile)

appft.c:76: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
appft.c:78: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
appft.c:93: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
appft.c:97: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
appft.c:100: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
appft.c:103: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
appft.c:105: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
appft.c:108: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
appft.c:112: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
appft.c:114: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
appft.c:115: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
appft.c:117: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
appft.c:120: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
appft.c:122: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
appft.c:124: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
appft.c:125: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
appft.c:130: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
appft.c:133: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
appft.c:135: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
appft.c:136: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
appft.c:141: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:151: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:154: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:159: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:0: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:0: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:172: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:172: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:172: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:180: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:183: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:188: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:0: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:197: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:199: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:202: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:207: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:0: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:0: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:220: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:220: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:220: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:229: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:231: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:66: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:74: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
fft3d.c:138: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
mainft.c:60: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
mainft.c:63: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
mainft.c:67: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
mainft.c:95: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
c_timers.c:23: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
c_timers.c:28: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
c_timers.c:38: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
c_timers.c:39: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21
c_timers.c:45: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21

to

 [LD] ft_aarch64_unaligned.out                                                                                                                                                                                                                 
appft.c:93: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                                                                                                                                           
appft.c:114: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                                                                                                                                          
appft.c:124: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                  
appft.c:135: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                                                                                                                                          
fft3d.c:154: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                                                                                                                                          
fft3d.c:0: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                                                                                                                                            
fft3d.c:0: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                                                                                                                                            
fft3d.c:172: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                                                                                                                                          
fft3d.c:172: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                  
fft3d.c:172: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                  
fft3d.c:183: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                  
fft3d.c:0: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                    
fft3d.c:197: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                  
fft3d.c:202: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                                                                                                                                          
fft3d.c:0: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                                                                                                                                            
fft3d.c:0: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                    
fft3d.c:220: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                                                                                                                                          
fft3d.c:220: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                                                                                                                                          
fft3d.c:220: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                                                                                                                                          
fft3d.c:74: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                   
c_timers.c:23: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                                                                                                                                        
c_timers.c:28: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                                                                                                                                        
c_timers.c:38: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                
c_timers.c:39: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                
c_timers.c:45: error: relocation overflow in R_AARCH64_ADR_PREL_PG_HI21                                                                                                                                                                        
make[1]: *** [../../common/common.mk:284: ft_aarch64_unaligned.out] Error 1

@compor
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compor commented Apr 6, 2023 •
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Reading https://clang.llvm.org/docs/UsersManual.html#cmdoption-ftls-model seems that the TLS option I used was not right, but in any case, this seems more related to the OMP build case as suggested in ssrg-vt/popcorn-compiler#10

@blackgeorge-boom
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Thanks for the update @compor. Yes, this seems like a nasty error.

@compor
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compor commented Apr 6, 2023

The combination of flags that reduce the errors is -mcmodel=large and -fPIC for both musl libc and ft.

Using -flts-model=local had no effect.

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