Currently, we do not support relaxations of TLS GD/LD relocations
for ARM64. This is in practice not a problem because TLSDESC is used
on ARM64 by default.
However, there's one situation in which not supporting TLS GD/LD
relaxation becomes an issue; static linking. If an executable is
statically-linked, relaxation is mandatory because we can't generate
dynamic relocations for GD/LD relocations.
In this patch, we simply report an error if an object file compiled
with TLS GD/LD is used for creating a statically-linked executable.
This commit fixes all tests on ARM64.
use stoul for unsigned long
image-base i64 to u64 parse_unsigned_number
Signed-off-by: nick-rawlings <100548346+nick-rawlings@users.noreply.github.com>
Implement support for the R_AARCH64_LD_PREL_LO19 relocation type. Since
this actually behaves the same way as R_AARCH64_CONDBR19, reuse the
relevant code.
Signed-off-by: Alois Wohlschlager <alois1@gmx-topmail.de>
For a static position-independent executable, a libc's intitialization
routine reads the dynamic relocation table and apply them. It looks like
on ARM64, they simply apply relocations from the begining of the table
to end. Therefore, if an IFUNC relocation appears before RELATIVE relocs,
the IFUNC resolver would see an unrelocated value. So, we need to place
RELATIVE relocs before IFUNCs.
Fixes https://github.com/rui314/mold/issues/382
Some `ldd` impls don't support the --version option. We do not
want to show the error message but instead just skip the test
entirely.
https://github.com/rui314/mold/pull/385
After a certain point, it is not expected that there's a remaining
undefined symbol. -noinhibit-exec did not respect that invariant,
which caused a crash bug on ARM64.
This change forces all symbols to be resolved if --noinhibit-exec
is given.
Fixes https://github.com/rui314/mold/issues/383
We unset `LANG`, but it looks like `LC_ALL` takes precedence over `LANG`,
so we should set `LC_ALL` to `C`.
Reported at https://github.com/rui314/mold/pull/385
mold 1.1.1 generates `-static-pie` code that works with glibc 2.35 but
segfaults with glibc 2.34 or older.
Signed-off-by: Christoph Erhardt <github@sicherha.de>
Previously, mold did not work with the -static-pie compiler flag.
In order to support static PIE, we need the following:
1. Create a .dynamic section even if it is not a dynamic executable, and
2. do not define __rel_iplt_start/end symbols.
The second part is required to workaround a glibc issue.
Even with these changes, mold-generated executable doesn't work with
old glibc versions. But I think it's OK because -static-pie is relatively
new option and you need a newer toolchain anyway.
It looks like the glibc loader does not use this field in the dynamic
section. GNU ld, gold and LLVM lld don't create this. So I think we
can just follow suit.
In C++, the size of an empty class is 1 rather than 0 because every
object is guaranteed to have a unique address. But if we do not need
the unique address guarantee, we can add `[[no_unique_address]]` to
a class member to save 1 byte. This is a new C++20 feature.
Previously, we set the address of `_GLOBAL_OFFSET_TABLE_` to `.got.plt`
on i386 and x86-64 and to `.got` on other targets. But it looks like
this special treament of x86 isn't necessary. The x86-64 psABI said
that the symbol can even be in the middle of `.got` (*1). If `.got.plt`
is missing, GNU linker set it to `.got`.
This commit unconditionally set the symbol value to `.got`.
(*1) x86-64 psABI 1.0 p.77: "The symbol _GLOBAL_OFFSET_TABLE_ may
reside in the middle of the .got section, allowing both negative and
non-negative offsets into the array of addresses."
