[Bug build/34311] New: elf/tst-thp-1 failed to link

https://sourceware.org/bugzilla/show_bug.cgi?id=34311

            Bug ID: 34311
           Summary: elf/tst-thp-1 failed to link
           Product: glibc
           Version: 2.44
            Status: NEW
          Severity: normal
          Priority: P2
         Component: build
          Assignee: unassigned at sourceware dot org
          Reporter: hjl.tools at gmail dot com
                CC: carlos at redhat dot com
  Target Milestone: ---
            Target: arc

One of the new tests fails to link for ARC:

https://sourceware.org/pipermail/libc-testresults/2026q2/014752.html

/notnfs/josmyers/glibc-bot/build/glibcs/arc-linux-gnu/glibc/support/libsupport_nonshared.a(support_test_main.oS):
in function `support_test_main':
/notnfs/josmyers/glibc-bot/src/glibc/support/support_test_main.c:396:(.text+0x650):
relocation truncated to fit: R_ARC_S25W_PCREL_PLT against symbol `atexit'
defined in .text section in
/notnfs/josmyers/glibc-bot/build/glibcs/arc-linux-gnu/glibc/libc_nonshared.a(atexit.oS)
/notnfs/josmyers/glibc-bot/install/compilers/arc-linux-gnu/arc-glibc-linux-gnu/bin/ld:
final link failed
collect2: error: ld returned 1 exit status
make[3]: *** [../Rules:261:
/notnfs/josmyers/glibc-bot/build/glibcs/arc-linux-gnu/glibc/elf/tst-thp-1]
Error 1

Since R_ARC_S25W_PCREL range is very limited:

[hjl@gnu-zen4-1 tmp]$ cat x.c
#include <stdlib.h>

void
foo (void)
{
}

int
main ()
{
  atexit (foo);
  return 0;
}
[hjl@gnu-zen4-1 tmp]$ cat big.S
#ifndef N
#define N 16
#endif

        .text
        .space N * 1024 * 1024
[hjl@gnu-zen4-1 tmp]$
/export/build/gnu/tools-build/glibc-many/install/compilers/arc-linux-gnu/bin/arc-glibc-linux-gnu-gcc
x.c big.S
/tmp/ccp5O4FS.o: in function `main':
x.c:(.text+0x1e): relocation truncated to fit: R_ARC_S25W_PCREL against symbol
`atexit' defined in .text section in
/export/build/gnu/tools-build/glibc-many/install/compilers/arc-linux-gnu/sysroot/usr/lib/libc_nonshared.a(atexit.oS)
/export/build/gnu/tools-build/glibc-many/install/compilers/arc-linux-gnu/arc-glibc-linux-gnu/bin/ld:
final link failed
collect2: error: ld returned 1 exit status
[hjl@gnu-zen4-1 tmp]$
/export/build/gnu/tools-build/glibc-many/install/compilers/arc-linux-gnu/bin/arc-glibc-linux-gnu-gcc
x.c big.S -DN=15
[hjl@gnu-zen4-1 tmp]$ 

all THP tests linked with elf/tst-thp-size-mod.o:

[hjl@gnu-zen4-1 tmp]$ readelf -SW
/export/build/gnu/tools-build/glibc-many/build/glibcs/arc-linux-gnu/glibc/elf/tst-thp-size-mod.o
There are 9 section headers, starting at offset 0x200011c:

Section Headers:
  [Nr] Name              Type            Addr     Off    Size   ES Flg Lk Inf
Al
  [ 0]                   NULL            00000000 000000 000000 00      0   0 
0
  [ 1] .text             PROGBITS        00000000 000034 2000000 00  AX  0   0 
1
  [ 2] .data             PROGBITS        00000000 2000034 000000 00  WA  0   0 
1
  [ 3] .bss              NOBITS          00000000 2000034 000000 00  WA  0   0 
1
  [ 4] .note.GNU-stack   NOTE            00000000 2000034 000000 00      0   0 
1
  [ 5] .ARC.attributes   ARC_ATTRIBUTES  00000000 2000034 00001f 00      0   0 
1
  [ 6] .symtab           SYMTAB          00000000 2000054 000070 10      7   6 
4
  [ 7] .strtab           STRTAB          00000000 20000c4 00000a 00      0   0 
1
  [ 8] .shstrtab         STRTAB          00000000 20000ce 00004c 00      0   0 
1
Key to Flags:
  W (write), A (alloc), X (execute), M (merge), S (strings), I (info),
  L (link order), O (extra OS processing required), G (group), T (TLS),
  C (compressed), x (unknown), o (OS specific), E (exclude),
  D (mbind), p (processor specific)
[hjl@gnu-zen4-1 tmp]$ 

fail to link due to R_ARC_S25W_PCREL overflow.

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