https://sourceware.org/bugzilla/show_bug.cgi?id=32772
Sam James <sam at gentoo dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |nelsonc1225 at sourceware dot
org
--- Comment #3 from Sam James <sam at gentoo dot org> ---
Started with:
commit 4295841be4392fcff33a1efee6d4345063021e6b
Author: Nelson Chu <[email protected]>
Date: Sat Feb 8 16:33:37 2025 +0800
RISC-V: Go PLT for CALL/JUMP/RVC_JUMP if `h->plt.offset' isn't -1
I got an request about the undefined behaviors, considering the following
case,
$ cat test.c
void main ()
{
foo();
}
$ cat lib.h
void foo(void);
$ riscv64-unknown-linux-gnu-gcc test.c
riscv64-unknown-linux-gnu/bin/ld: /tmp/ccRO8fJl.o: in function `main':
test.c:(.text+0x8): undefined reference to `foo'
collect2: error: ld returned 1 exit status
$ riscv64-unknown-linux-gnu-gcc test.c
-Wl,--unresolved-symbols=ignore-in-object-files
$ qemu-riscv64 a.out
Segmentation fault (core dumped)
Testing with x86 and aarch64, they won't get the segfault since they go plt
for the undefined foo symbol. So, after applying this patch, I can get the
following too,
$ qemu-riscv64 a.out
a.out: symbol lookup error: a.out: undefined symbol: foo
The change of this patch should only affect the call behavior, which refer
to an undefined (weak) symbol, when building an dynamic executable. I
think
the pic/pie behavior won't be affected as usual.
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