commit 006efc27dc52e4093ccee2dd5d4867c6a7f13fd6
author Hui Li <lihui@loongson.cn> Thu Mar 21 09:41:30 2024 +0800
committer Tiezhu Yang <yangtiezhu@loongson.cn> Thu Mar 21 22:07:24 2024 +0800
tree 18eebee1d57fb9ca5c663944de94ea1f5e5e58b3
parent b7b293fa3bccbe0b450a859f71c2a90517902719

gdb: LoongArch: Silence warning about core file of lsx and lasx

In loongarch_iterate_over_regset_sections(), the second and third arguments
of the iterate_over_regset_sections_cb callback function should be the regset
size which is regsize * regnum. Otherwise when execute:

make check-gdb TESTS="gdb.base/corefile.exp"

there exists the following failed log:

  (gdb) core-file /home/fedora/community/gdb/build/gdb/testsuite/outputs/gdb.base/corefile/corefile.core
  [New LWP 531099]
  warning: Unexpected size of section `.reg-loongarch-lsx/531099' in core file.
  warning: Unexpected size of section `.reg-loongarch-lasx/531099' in core file.
  Core was generated by `/home/fedora/community/gdb/build/gdb/testsuite/outputs/gdb.base/corefile/corefile'.
  Program terminated with signal SIGABRT, Aborted.
  warning: Unexpected size of section `.reg-loongarch-lsx/531099' in core file.
  warning: Unexpected size of section `.reg-loongarch-lasx/531099' in core file.
  #0  0x00007ffff3081600 in __pthread_kill_implementation.constprop.0 () from /lib64/libc.so.6
  (gdb) FAIL: gdb.base/corefile.exp: core-file warning-free

Signed-off-by: Hui Li <lihui@loongson.cn>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>

gdb/loongarch-linux-tdep.c

diff --git a/gdb/loongarch-linux-tdep.c b/gdb/loongarch-linux-tdep.c
index 1c7a7cf..db6371e 100644
--- a/gdb/loongarch-linux-tdep.c
+++ b/gdb/loongarch-linux-tdep.c
@@ -498,7 +498,9 @@
   int fpsize = fprsize * LOONGARCH_LINUX_NUM_FPREGSET +
     fccsize * LOONGARCH_LINUX_NUM_FCC + fcsrsize;
   int lsxrsize = register_size (gdbarch, LOONGARCH_FIRST_LSX_REGNUM);
+  int lsxsize = lsxrsize * LOONGARCH_LINUX_NUM_LSXREGSET;
   int lasxrsize = register_size (gdbarch, LOONGARCH_FIRST_LASX_REGNUM);
+  int lasxsize = lasxrsize * LOONGARCH_LINUX_NUM_LASXREGSET;
   int scrsize = register_size (gdbarch, LOONGARCH_FIRST_SCR_REGNUM);
   int eflagssize = register_size (gdbarch, LOONGARCH_EFLAGS_REGNUM);
   int ftopsize = register_size (gdbarch, LOONGARCH_FTOP_REGNUM);
@@ -507,9 +509,9 @@
   cb (".reg", LOONGARCH_LINUX_NUM_GREGSET * gprsize,
       LOONGARCH_LINUX_NUM_GREGSET * gprsize, &loongarch_gregset, nullptr, cb_data);
   cb (".reg2", fpsize, fpsize, &loongarch_fpregset, nullptr, cb_data);
-  cb (".reg-loongarch-lsx", lsxrsize, lsxrsize,
+  cb (".reg-loongarch-lsx", lsxsize, lsxsize,
       &loongarch_lsxregset, nullptr, cb_data);
-  cb (".reg-loongarch-lasx", lasxrsize, lasxrsize,
+  cb (".reg-loongarch-lasx", lasxsize, lasxsize,
       &loongarch_lasxregset, nullptr, cb_data);
   cb (".reg-loongarch-lbt", lbtsize, lbtsize,
       &loongarch_lbtregset, nullptr, cb_data);