Hello,
On Thu, 24 Dec 2020, Herman ten Brugge via Tinycc-devel wrote:
The recent commit 'ELF: include SHT_NOTE sections everywhere' does not work
for me on x86_64.
The problem is in /usr/lib64/crt1.o
If I do: readelf -a -W /usr/lib64/crt1.o | grep .gnu.build.attributes.hot
I get:
[64] .gnu.build.attributes.hot NOTE 0002e0
28 00 G 0 0 4
[65] .rela.gnu.build.attributes.hot RELA 001b38 30 18
IG 90 64 8
[72] .gnu.build.attributes.hot NOTE 000380
28 00 G 0 0 4
[73] .rela.gnu.build.attributes.hot RELA 001bf8 30 18
IG 90 72 8
[80] .gnu.build.attributes.hot NOTE 000420
28 00 G 0 0 4
[81] .rela.gnu.build.attributes.hot RELA 001cb8 30 18
IG 90 80 8
[ 64] .gnu.build.attributes.hot
[ 65] .rela.gnu.build.attributes.hot
[ 72] .gnu.build.attributes.hot
[ 73] .rela.gnu.build.attributes.hot
[ 80] .gnu.build.attributes.hot
[ 81] .rela.gnu.build.attributes.hot
Huh, so multiple same-named sections in an .o file. Somewhat unusual, but
the above are all in section groups, so a supported scenario (in the ELF
sense, not by TCC). Can you send my your crt1.o file, please?
The tcc_load_object_file tries to merge the sections and then adjust the
reloads. This does not work in this case because there are 3 section
with the same name.
A hack would be to accept NOTE sections but only if they aren't in groups.
Ugly, but, well... Of course, correctly implementing ELF group support
would also be an option, but more work, or maybe other hacks are possible.
I'll take a look if I can get such crt file.
Ciao,
Michael.___
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