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b118bce87a
The rtld audit support show two problems on aarch64:
1. _dl_runtime_resolve does not preserve x8, the indirect result
location register, which might generate wrong result calls
depending of the function signature.
2. The NEON Q registers pushed onto the stack by _dl_runtime_resolve
were twice the size of D registers extracted from the stack frame by
_dl_runtime_profile.
While 2. might result in wrong information passed on the PLT tracing,
1. generates wrong runtime behaviour.
The aarch64 rtld audit support is changed to:
* Both La_aarch64_regs and La_aarch64_retval are expanded to include
both x8 and the full sized NEON V registers, as defined by the
ABI.
* dl_runtime_profile needed to extract registers saved by
_dl_runtime_resolve and put them into the new correctly sized
La_aarch64_regs structure.
* The LAV_CURRENT check is change to only accept new audit modules
to avoid the undefined behavior of not save/restore x8.
* Different than other architectures, audit modules older than
LAV_CURRENT are rejected (both La_aarch64_regs and La_aarch64_retval
changed their layout and there are no requirements to support multiple
audit interface with the inherent aarch64 issues).
* A new field is also reserved on both La_aarch64_regs and
La_aarch64_retval to support variant pcs symbols.
Similar to x86, a new La_aarch64_vector type to represent the NEON
register is added on the La_aarch64_regs (so each type can be accessed
directly).
Since LAV_CURRENT was already bumped to support bind-now, there is
no need to increase it again.
Checked on aarch64-linux-gnu.
Co-authored-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
(cherry picked from commit
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| .. | ||
| bits | ||
| fpu | ||
| multiarch | ||
| nptl | ||
| sys | ||
| __longjmp.S | ||
| __mtag_tag_region.S | ||
| __mtag_tag_zero_region.S | ||
| abort-instr.h | ||
| atomic-machine.h | ||
| bsd-_setjmp.c | ||
| bsd-setjmp.c | ||
| configure | ||
| configure.ac | ||
| crti.S | ||
| crtn.S | ||
| dl-audit-check.h | ||
| dl-bti.c | ||
| dl-dtprocnum.h | ||
| dl-irel.h | ||
| dl-link.sym | ||
| dl-lookupcfg.h | ||
| dl-machine.h | ||
| dl-prop.h | ||
| dl-sysdep.h | ||
| dl-tls.h | ||
| dl-tlsdesc.h | ||
| dl-tlsdesc.S | ||
| dl-trampoline.S | ||
| dl-tunables.list | ||
| e_sqrtl.c | ||
| elf-initfini.h | ||
| hp-timing.h | ||
| Implies | ||
| jmpbuf-offsets.h | ||
| jmpbuf-unwind.h | ||
| ldsodefs.h | ||
| libc-mtag.h | ||
| libc-tls.c | ||
| libm-test-ulps | ||
| libm-test-ulps-name | ||
| linkmap.h | ||
| machine-gmon.h | ||
| Makefile | ||
| math-tests-trap.h | ||
| mcount.c | ||
| memchr.S | ||
| memcmp.S | ||
| memcpy.S | ||
| memmove.c | ||
| memrchr.S | ||
| memset-reg.h | ||
| memset.S | ||
| memusage.h | ||
| preconfigure | ||
| rawmemchr.S | ||
| setjmp.S | ||
| sfp-machine.h | ||
| sotruss-lib.c | ||
| stackinfo.h | ||
| start.S | ||
| stpcpy.S | ||
| strchr.S | ||
| strchrnul.S | ||
| strcmp.S | ||
| strcpy.S | ||
| string_private.h | ||
| strlen.S | ||
| strncmp.S | ||
| strnlen.S | ||
| strrchr.S | ||
| sysdep.h | ||
| tls-macros.h | ||
| tlsdesc.c | ||
| tlsdesc.sym | ||
| tst-audit26.c | ||
| tst-audit26mod.c | ||
| tst-audit26mod.h | ||
| tst-audit27.c | ||
| tst-audit27mod.c | ||
| tst-audit27mod.h | ||
| tst-audit.h | ||
| tst-auditmod26.c | ||
| tst-auditmod27.c | ||
| tst-ifunc-arg-1.c | ||
| tst-ifunc-arg-2.c | ||
| tst-vpcs-mod.S | ||
| tst-vpcs.c | ||
| Versions | ||