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glibc/sysdeps/aarch64/tst-audit27mod.h

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elf: Fix runtime linker auditing on aarch64 (BZ #26643) 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>
2022-01-24 13:46:18 +00:00
/* Check LD_AUDIT for aarch64 specific ABI.
Update copyright dates with scripts/update-copyrights
2024-01-01 18:12:26 +00:00
Copyright (C) 2022-2024 Free Software Foundation, Inc.
elf: Fix runtime linker auditing on aarch64 (BZ #26643) 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>
2022-01-24 13:46:18 +00:00
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _TST_AUDIT27MOD_H
#define _TST_AUDIT27MOD_H 1
#include <float.h>
#define FUNC_FLOAT_ARG0 FLT_MIN
#define FUNC_FLOAT_ARG1 FLT_MAX
#define FUNC_FLOAT_ARG2 FLT_EPSILON
#define FUNC_FLOAT_ARG3 FLT_TRUE_MIN
#define FUNC_FLOAT_ARG4 0.0f
#define FUNC_FLOAT_ARG5 1.0f
#define FUNC_FLOAT_ARG6 2.0f
#define FUNC_FLOAT_ARG7 3.0f
#define FUNC_FLOAT_RET 4.0f
float
tst_audit27_func_float (float a0, float a1, float a2, float a3, float a4,
float a5, float a6, float a7);
#define FUNC_DOUBLE_ARG0 DBL_MIN
#define FUNC_DOUBLE_ARG1 DBL_MAX
#define FUNC_DOUBLE_ARG2 DBL_EPSILON
#define FUNC_DOUBLE_ARG3 DBL_TRUE_MIN
#define FUNC_DOUBLE_ARG4 0.0
#define FUNC_DOUBLE_ARG5 1.0
#define FUNC_DOUBLE_ARG6 2.0
#define FUNC_DOUBLE_ARG7 3.0
#define FUNC_DOUBLE_RET 0x1.fffffe0000001p+127
double
tst_audit27_func_double (double a0, double a1, double a2, double a3, double a4,
double a5, double a6, double a7);
#define FUNC_LDOUBLE_ARG0 DBL_MAX + 1.0L
#define FUNC_LDOUBLE_ARG1 DBL_MAX + 2.0L
#define FUNC_LDOUBLE_ARG2 DBL_MAX + 3.0L
#define FUNC_LDOUBLE_ARG3 DBL_MAX + 4.0L
#define FUNC_LDOUBLE_ARG4 DBL_MAX + 5.0L
#define FUNC_LDOUBLE_ARG5 DBL_MAX + 6.0L
#define FUNC_LDOUBLE_ARG6 DBL_MAX + 7.0L
#define FUNC_LDOUBLE_ARG7 DBL_MAX + 8.0L
#define FUNC_LDOUBLE_RET 0x1.fffffffffffff000000000000001p+1023L
long double
tst_audit27_func_ldouble (long double a0, long double a1, long double a2,
long double a3, long double a4, long double a5,
long double a6, long double a7);
#endif
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