845 lines
19 KiB
C
845 lines
19 KiB
C
/* Copyright (C) 2014-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <sys/prctl.h>
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#include <dlfcn.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdbool.h>
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#include <errno.h>
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#if defined PR_GET_FP_MODE && defined PR_SET_FP_MODE
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# define HAVE_PRCTL_FP_MODE 1
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# define FR1_MODE (PR_FP_MODE_FR)
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# define FRE_MODE (PR_FP_MODE_FR | PR_FP_MODE_FRE)
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#else
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# define HAVE_PRCTL_FP_MODE 0
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# define FR1_MODE 0x1
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# define FRE_MODE 0x2
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#endif
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#define STR_VAL(VAL) #VAL
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#define N_STR(VAL) STR_VAL(VAL)
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#define START_STATE(NAME) \
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case s_ ## NAME: \
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{ \
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switch (obj) \
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{
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#define END_STATE \
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default: \
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return false; \
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} \
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break; \
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}
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#define NEXT(OBJ, NEXT_STATE) \
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case o_ ## OBJ: \
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current_fp_state = s_ ## NEXT_STATE; \
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break;
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#define NEXT_REQ_FR1(OBJ, NEXT_STATE) \
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case o_ ## OBJ: \
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{ \
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if (has_fr1) \
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current_fp_state = s_ ## NEXT_STATE; \
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else \
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return false; \
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} \
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break;
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#define NEXT_REQ_FR0(OBJ, NEXT_STATE) \
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case o_ ## OBJ: \
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{ \
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if (!is_r6 \
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|| (is_r6 && has_fr1 && has_fre)) \
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current_fp_state = s_ ## NEXT_STATE; \
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else \
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return false; \
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} \
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break;
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#define NEXT_REQ_FRE(OBJ, NEXT_STATE) \
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case o_ ## OBJ: \
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{ \
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if (has_fr1 && has_fre) \
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current_fp_state = s_ ## NEXT_STATE; \
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else \
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return false; \
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} \
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break;
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#define NEXT_NO_MODE_CHANGE(OBJ, NEXT_STATE) \
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case o_ ## OBJ: \
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{ \
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if (current_mode_valid_p (s_ ## NEXT_STATE)) \
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{ \
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current_fp_state = s_ ## NEXT_STATE; \
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cant_change_mode = true; \
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} \
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else \
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return false; \
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} \
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break;
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static const char * const shared_lib_names[] =
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{
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"tst-abi-fpanymod.so", "tst-abi-fpsoftmod.so", "tst-abi-fpsinglemod.so",
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"tst-abi-fp32mod.so", "tst-abi-fp64mod.so", "tst-abi-fp64amod.so",
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"tst-abi-fpxxmod.so", "tst-abi-fpxxomod.so"
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};
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struct fp_mode_req
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{
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int mode1;
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int mode2;
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int mode3;
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};
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enum fp_obj
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{
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o_any,
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o_soft,
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o_single,
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o_fp32,
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o_fp64,
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o_fp64a,
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o_fpxx,
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o_fpxxo,
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o_max
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};
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enum fp_state
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{
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s_any,
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s_soft,
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s_single,
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s_fp32,
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s_fpxx,
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s_fpxxo,
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s_fp64a,
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s_fp64,
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s_fpxxo_fpxx,
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s_fp32_fpxx,
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s_fp32_fpxxo,
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s_fp32_fpxxo_fpxx,
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s_fp32_fp64a_fpxx,
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s_fp32_fp64a_fpxxo,
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s_fp32_fp64a_fpxxo_fpxx,
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s_fp64a_fp32,
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s_fp64a_fpxx,
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s_fp64a_fpxxo,
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s_fp64a_fp64,
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s_fp64a_fp64_fpxx,
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s_fp64a_fp64_fpxxo,
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s_fp64a_fpxx_fpxxo,
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s_fp64a_fp64_fpxxo_fpxx,
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s_fp64_fpxx,
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s_fp64_fpxxo,
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s_fp64_fpxx_fpxxo
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};
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static int current_fp_mode;
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static bool cant_change_mode = false;
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static bool has_fr1 = false;
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static bool has_fre = false;
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static bool is_r6 = false;
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static unsigned int fp_obj_count[o_max];
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void * shared_lib_ptrs[o_max];
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static enum fp_state current_fp_state = s_any;
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static enum fp_obj test_objects[FPABI_COUNT] = { FPABI_LIST };
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/* This function will return the valid FP modes for the specified state. */
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static struct fp_mode_req
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compute_fp_modes (enum fp_state state)
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{
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struct fp_mode_req requirements;
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requirements.mode1 = -1;
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requirements.mode2 = -1;
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requirements.mode3 = -1;
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switch (state)
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{
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case s_single:
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{
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if (is_r6)
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requirements.mode1 = FR1_MODE;
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else
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{
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requirements.mode1 = 0;
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requirements.mode2 = FR1_MODE;
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}
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break;
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}
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case s_fp32:
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case s_fp32_fpxx:
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case s_fp32_fpxxo:
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case s_fp32_fpxxo_fpxx:
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{
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if (is_r6)
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requirements.mode1 = FRE_MODE;
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else
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{
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requirements.mode1 = 0;
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requirements.mode2 = FRE_MODE;
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}
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break;
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}
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case s_fpxx:
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case s_fpxxo:
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case s_fpxxo_fpxx:
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case s_any:
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case s_soft:
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{
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if (is_r6)
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{
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requirements.mode1 = FR1_MODE;
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requirements.mode2 = FRE_MODE;
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}
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else
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{
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requirements.mode1 = 0;
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requirements.mode2 = FR1_MODE;
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requirements.mode3 = FRE_MODE;
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}
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break;
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}
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case s_fp64a:
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case s_fp64a_fpxx:
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case s_fp64a_fpxxo:
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case s_fp64a_fpxx_fpxxo:
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{
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requirements.mode1 = FR1_MODE;
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requirements.mode2 = FRE_MODE;
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break;
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}
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case s_fp64:
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case s_fp64_fpxx:
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case s_fp64_fpxxo:
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case s_fp64_fpxx_fpxxo:
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case s_fp64a_fp64:
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case s_fp64a_fp64_fpxx:
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case s_fp64a_fp64_fpxxo:
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case s_fp64a_fp64_fpxxo_fpxx:
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{
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requirements.mode1 = FR1_MODE;
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break;
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}
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case s_fp64a_fp32:
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case s_fp32_fp64a_fpxx:
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case s_fp32_fp64a_fpxxo:
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case s_fp32_fp64a_fpxxo_fpxx:
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{
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requirements.mode1 = FRE_MODE;
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break;
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}
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}
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return requirements;
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}
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/* Check the current mode is suitable for the specified state. */
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static bool
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current_mode_valid_p (enum fp_state s)
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{
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struct fp_mode_req req = compute_fp_modes (s);
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return (req.mode1 == current_fp_mode
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|| req.mode2 == current_fp_mode
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|| req.mode3 == current_fp_mode);
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}
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/* Run the state machine by adding a new object. */
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static bool
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set_next_fp_state (enum fp_obj obj)
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{
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cant_change_mode = false;
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switch (current_fp_state)
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{
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START_STATE(soft)
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NEXT(soft,soft)
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NEXT(any,soft)
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END_STATE
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START_STATE(single)
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NEXT(single,single)
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NEXT(any,single)
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END_STATE
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START_STATE(any)
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NEXT_REQ_FR0(fp32, fp32)
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NEXT(fpxx, fpxx)
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NEXT(fpxxo, fpxxo)
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NEXT_REQ_FR1(fp64a, fp64a)
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NEXT_REQ_FR1(fp64, fp64)
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NEXT(any,any)
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NEXT(soft,soft)
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NEXT(single,single)
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END_STATE
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START_STATE(fp32)
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NEXT_REQ_FR0(fp32,fp32)
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NEXT(fpxx, fp32_fpxx)
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NEXT(fpxxo, fp32_fpxxo)
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NEXT_REQ_FRE(fp64a, fp64a_fp32)
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NEXT(any,fp32)
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END_STATE
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START_STATE(fpxx)
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NEXT_REQ_FR0(fp32, fp32_fpxx)
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NEXT_REQ_FR1(fp64, fp64_fpxx)
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NEXT_REQ_FR1(fp64a, fp64a_fpxx)
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NEXT(fpxxo, fpxxo_fpxx)
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NEXT(fpxx,fpxx)
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NEXT(any,fpxx)
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END_STATE
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START_STATE(fpxxo)
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NEXT_NO_MODE_CHANGE(fp32, fp32_fpxxo)
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NEXT_NO_MODE_CHANGE(fp64, fp64_fpxxo)
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NEXT_NO_MODE_CHANGE(fp64a, fp64a_fpxxo)
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NEXT_NO_MODE_CHANGE(fpxx, fpxxo_fpxx)
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NEXT_NO_MODE_CHANGE(fpxxo,fpxxo)
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NEXT_NO_MODE_CHANGE(any,fpxxo)
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END_STATE
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START_STATE(fp64a)
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NEXT_REQ_FRE(fp32, fp64a_fp32)
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NEXT_REQ_FR1(fp64, fp64a_fp64)
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NEXT(fpxxo, fp64a_fpxxo)
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NEXT(fpxx, fp64a_fpxx)
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NEXT_REQ_FR1(fp64a, fp64a)
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NEXT(any, fp64a)
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END_STATE
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START_STATE(fp64)
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NEXT_REQ_FR1(fp64a, fp64a_fp64)
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NEXT(fpxxo, fp64_fpxxo)
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NEXT(fpxx, fp64_fpxx)
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NEXT_REQ_FR1(fp64, fp64)
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NEXT(any, fp64)
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END_STATE
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START_STATE(fpxxo_fpxx)
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NEXT_NO_MODE_CHANGE(fp32, fp32_fpxxo_fpxx)
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NEXT_NO_MODE_CHANGE(fp64, fp64_fpxx_fpxxo)
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NEXT_NO_MODE_CHANGE(fp64a, fp64a_fpxx_fpxxo)
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NEXT_NO_MODE_CHANGE(fpxx, fpxxo_fpxx)
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NEXT_NO_MODE_CHANGE(fpxxo, fpxxo_fpxx)
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NEXT_NO_MODE_CHANGE(any, fpxxo_fpxx)
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END_STATE
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START_STATE(fp32_fpxx)
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NEXT_REQ_FR0(fp32, fp32_fpxx)
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NEXT(fpxx, fp32_fpxx)
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NEXT(fpxxo, fp32_fpxxo_fpxx)
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NEXT_REQ_FRE(fp64a, fp32_fp64a_fpxx)
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NEXT(any, fp32_fpxx)
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END_STATE
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START_STATE(fp32_fpxxo)
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NEXT_NO_MODE_CHANGE(fp32, fp32_fpxxo)
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NEXT_NO_MODE_CHANGE(fpxxo, fp32_fpxxo)
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NEXT_NO_MODE_CHANGE(fpxx, fp32_fpxxo_fpxx)
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NEXT_NO_MODE_CHANGE(fp64a, fp32_fp64a_fpxxo)
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NEXT_NO_MODE_CHANGE(any, fp32_fpxxo)
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END_STATE
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START_STATE(fp32_fpxxo_fpxx)
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NEXT_NO_MODE_CHANGE(fp32, fp32_fpxxo_fpxx)
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NEXT_NO_MODE_CHANGE(fpxxo, fp32_fpxxo_fpxx)
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NEXT_NO_MODE_CHANGE(fpxx, fp32_fpxxo_fpxx)
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NEXT_NO_MODE_CHANGE(fp64a, fp32_fp64a_fpxxo_fpxx)
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NEXT_NO_MODE_CHANGE(any, fp32_fpxxo_fpxx)
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END_STATE
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START_STATE(fp64a_fp32)
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NEXT_REQ_FRE(fp32, fp64a_fp32)
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NEXT_REQ_FRE(fp64a, fp64a_fp32)
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NEXT(fpxxo, fp32_fp64a_fpxxo)
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NEXT(fpxx, fp32_fp64a_fpxx)
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NEXT(any, fp64a_fp32)
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END_STATE
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START_STATE(fp64a_fpxx)
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NEXT_REQ_FRE(fp32, fp32_fp64a_fpxx)
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NEXT_REQ_FR1(fp64a, fp64a_fpxx)
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NEXT(fpxx, fp64a_fpxx)
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NEXT(fpxxo, fp64a_fpxx_fpxxo)
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NEXT_REQ_FR1(fp64, fp64a_fp64_fpxx)
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NEXT(any, fp64a_fpxx)
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END_STATE
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START_STATE(fp64a_fpxxo)
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NEXT_NO_MODE_CHANGE(fp32, fp32_fp64a_fpxxo)
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NEXT_NO_MODE_CHANGE(fp64a, fp64a_fpxxo)
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NEXT_NO_MODE_CHANGE(fpxx, fp64a_fpxx_fpxxo)
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NEXT_NO_MODE_CHANGE(fpxxo, fp64a_fpxxo)
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NEXT_NO_MODE_CHANGE(fp64, fp64a_fp64_fpxxo)
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NEXT_NO_MODE_CHANGE(any, fp64a_fpxxo)
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END_STATE
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START_STATE(fp64a_fpxx_fpxxo)
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NEXT_NO_MODE_CHANGE(fp32, fp32_fp64a_fpxxo_fpxx)
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NEXT_NO_MODE_CHANGE(fp64a, fp64a_fpxx_fpxxo)
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NEXT_NO_MODE_CHANGE(fpxx, fp64a_fpxx_fpxxo)
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NEXT_NO_MODE_CHANGE(fpxxo, fp64a_fpxx_fpxxo)
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NEXT_NO_MODE_CHANGE(fp64, fp64a_fp64_fpxxo_fpxx)
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NEXT_NO_MODE_CHANGE(any, fp64a_fpxx_fpxxo)
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END_STATE
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START_STATE(fp64_fpxx)
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NEXT_REQ_FR1(fp64a, fp64a_fp64_fpxx)
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NEXT(fpxxo, fp64_fpxx_fpxxo)
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NEXT(fpxx, fp64_fpxx)
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NEXT_REQ_FR1(fp64, fp64_fpxx)
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NEXT(any, fp64_fpxx)
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END_STATE
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START_STATE(fp64_fpxxo)
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NEXT_NO_MODE_CHANGE(fp64a, fp64a_fp64_fpxxo)
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NEXT_NO_MODE_CHANGE(fpxxo, fp64_fpxxo)
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NEXT_NO_MODE_CHANGE(fpxx, fp64_fpxx_fpxxo)
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NEXT_NO_MODE_CHANGE(fp64, fp64_fpxxo)
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NEXT_NO_MODE_CHANGE(any, fp64_fpxxo)
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END_STATE
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START_STATE(fp64_fpxx_fpxxo)
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NEXT_NO_MODE_CHANGE(fp64a, fp64a_fp64_fpxxo_fpxx)
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NEXT_NO_MODE_CHANGE(fpxxo, fp64_fpxx_fpxxo)
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NEXT_NO_MODE_CHANGE(fpxx, fp64_fpxx_fpxxo)
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NEXT_NO_MODE_CHANGE(fp64, fp64_fpxx_fpxxo)
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NEXT_NO_MODE_CHANGE(any, fp64_fpxx_fpxxo)
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END_STATE
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|
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START_STATE(fp64a_fp64)
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NEXT_REQ_FR1(fp64a, fp64a_fp64)
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NEXT(fpxxo, fp64a_fp64_fpxxo)
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NEXT(fpxx, fp64a_fp64_fpxx)
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NEXT_REQ_FR1(fp64, fp64a_fp64)
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NEXT(any, fp64a_fp64)
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END_STATE
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START_STATE(fp64a_fp64_fpxx)
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NEXT_REQ_FR1(fp64a, fp64a_fp64_fpxx)
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NEXT(fpxxo, fp64a_fp64_fpxxo_fpxx)
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NEXT(fpxx, fp64a_fp64_fpxx)
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NEXT_REQ_FR1(fp64, fp64a_fp64_fpxx)
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NEXT(any, fp64a_fp64_fpxx)
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END_STATE
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|
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START_STATE(fp64a_fp64_fpxxo)
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NEXT_NO_MODE_CHANGE(fp64a, fp64a_fp64_fpxxo)
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NEXT_NO_MODE_CHANGE(fpxx, fp64a_fp64_fpxxo_fpxx)
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NEXT_NO_MODE_CHANGE(fpxxo, fp64a_fp64_fpxxo)
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NEXT_NO_MODE_CHANGE(fp64, fp64a_fp64_fpxxo)
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NEXT_NO_MODE_CHANGE(any, fp64a_fp64_fpxxo)
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END_STATE
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START_STATE(fp64a_fp64_fpxxo_fpxx)
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NEXT_NO_MODE_CHANGE(fp64a, fp64a_fp64_fpxxo_fpxx)
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NEXT_NO_MODE_CHANGE(fpxx, fp64a_fp64_fpxxo_fpxx)
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NEXT_NO_MODE_CHANGE(fpxxo, fp64a_fp64_fpxxo_fpxx)
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NEXT_NO_MODE_CHANGE(fp64, fp64a_fp64_fpxxo_fpxx)
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NEXT_NO_MODE_CHANGE(any, fp64a_fp64_fpxxo_fpxx)
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|
END_STATE
|
|
|
|
START_STATE(fp32_fp64a_fpxx)
|
|
NEXT_REQ_FRE(fp32, fp32_fp64a_fpxx)
|
|
NEXT_REQ_FRE(fp64a, fp32_fp64a_fpxx)
|
|
NEXT(fpxxo, fp32_fp64a_fpxxo_fpxx)
|
|
NEXT(fpxx, fp32_fp64a_fpxx)
|
|
NEXT(any, fp32_fp64a_fpxx)
|
|
END_STATE
|
|
|
|
START_STATE(fp32_fp64a_fpxxo)
|
|
NEXT_NO_MODE_CHANGE(fp32, fp32_fp64a_fpxxo)
|
|
NEXT_NO_MODE_CHANGE(fp64a, fp32_fp64a_fpxxo)
|
|
NEXT_NO_MODE_CHANGE(fpxx, fp32_fp64a_fpxxo_fpxx)
|
|
NEXT_NO_MODE_CHANGE(fpxxo, fp32_fp64a_fpxxo)
|
|
NEXT_NO_MODE_CHANGE(any, fp32_fp64a_fpxxo)
|
|
END_STATE
|
|
|
|
START_STATE(fp32_fp64a_fpxxo_fpxx)
|
|
NEXT_NO_MODE_CHANGE(fp32, fp32_fp64a_fpxxo_fpxx)
|
|
NEXT_NO_MODE_CHANGE(fp64a, fp32_fp64a_fpxxo_fpxx)
|
|
NEXT_NO_MODE_CHANGE(fpxx, fp32_fp64a_fpxxo_fpxx)
|
|
NEXT_NO_MODE_CHANGE(fpxxo, fp32_fp64a_fpxxo_fpxx)
|
|
NEXT_NO_MODE_CHANGE(any, fp32_fp64a_fpxxo_fpxx)
|
|
END_STATE
|
|
}
|
|
|
|
if (obj != o_max)
|
|
fp_obj_count[obj]++;
|
|
|
|
return true;
|
|
}
|
|
|
|
/* Run the state machine by removing an object. */
|
|
|
|
static bool
|
|
remove_object (enum fp_obj obj)
|
|
{
|
|
if (obj == o_max)
|
|
return false;
|
|
|
|
fp_obj_count[obj]--;
|
|
|
|
/* We can't change fp state until all the objects
|
|
of a particular type have been unloaded. */
|
|
if (fp_obj_count[obj] != 0)
|
|
return false;
|
|
|
|
switch (current_fp_state)
|
|
{
|
|
START_STATE(soft)
|
|
NEXT(soft,any)
|
|
END_STATE
|
|
|
|
START_STATE(single)
|
|
NEXT(single,any)
|
|
END_STATE
|
|
|
|
START_STATE(any)
|
|
NEXT(any,any)
|
|
END_STATE
|
|
|
|
START_STATE(fp32)
|
|
NEXT (fp32,any)
|
|
END_STATE
|
|
|
|
START_STATE(fpxx)
|
|
NEXT (fpxx,any)
|
|
END_STATE
|
|
|
|
START_STATE(fpxxo)
|
|
NEXT (fpxxo,any)
|
|
END_STATE
|
|
|
|
START_STATE(fp64a)
|
|
NEXT(fp64a, any)
|
|
END_STATE
|
|
|
|
START_STATE(fp64)
|
|
NEXT(fp64, any)
|
|
END_STATE
|
|
|
|
START_STATE(fpxxo_fpxx)
|
|
NEXT(fpxx, fpxxo)
|
|
NEXT(fpxxo, fpxx)
|
|
END_STATE
|
|
|
|
START_STATE(fp32_fpxx)
|
|
NEXT(fp32, fpxx)
|
|
NEXT(fpxx, fp32)
|
|
END_STATE
|
|
|
|
START_STATE(fp32_fpxxo)
|
|
NEXT(fp32, fpxxo)
|
|
NEXT(fpxxo, fp32)
|
|
END_STATE
|
|
|
|
START_STATE(fp32_fpxxo_fpxx)
|
|
NEXT(fp32, fpxxo_fpxx)
|
|
NEXT(fpxxo, fp32_fpxx)
|
|
NEXT(fpxx, fp32_fpxxo)
|
|
END_STATE
|
|
|
|
START_STATE(fp64a_fp32)
|
|
NEXT(fp32, fp64a)
|
|
NEXT(fp64a, fp32)
|
|
END_STATE
|
|
|
|
START_STATE(fp64a_fpxx)
|
|
NEXT(fp64a, fpxx)
|
|
NEXT(fpxx, fp64a)
|
|
END_STATE
|
|
|
|
START_STATE(fp64a_fpxxo)
|
|
NEXT(fp64a, fpxxo)
|
|
NEXT(fpxxo, fp64a)
|
|
END_STATE
|
|
|
|
START_STATE(fp64a_fpxx_fpxxo)
|
|
NEXT(fp64a, fpxxo_fpxx)
|
|
NEXT(fpxx, fp64a_fpxxo)
|
|
NEXT(fpxxo, fp64a_fpxx)
|
|
END_STATE
|
|
|
|
START_STATE(fp64_fpxx)
|
|
NEXT(fpxx, fp64)
|
|
NEXT(fp64, fpxx)
|
|
END_STATE
|
|
|
|
START_STATE(fp64_fpxxo)
|
|
NEXT(fpxxo, fp64)
|
|
NEXT(fp64, fpxxo)
|
|
END_STATE
|
|
|
|
START_STATE(fp64_fpxx_fpxxo)
|
|
NEXT(fp64, fpxxo_fpxx)
|
|
NEXT(fpxxo, fp64_fpxx)
|
|
NEXT(fpxx, fp64_fpxxo)
|
|
END_STATE
|
|
|
|
START_STATE(fp64a_fp64)
|
|
NEXT(fp64a, fp64)
|
|
NEXT(fp64, fp64a)
|
|
END_STATE
|
|
|
|
START_STATE(fp64a_fp64_fpxx)
|
|
NEXT(fp64a, fp64_fpxx)
|
|
NEXT(fpxx, fp64a_fp64)
|
|
NEXT(fp64, fp64a_fpxx)
|
|
END_STATE
|
|
|
|
START_STATE(fp64a_fp64_fpxxo)
|
|
NEXT(fp64a, fp64_fpxxo)
|
|
NEXT(fpxxo, fp64a_fp64)
|
|
NEXT(fp64, fp64a_fpxxo)
|
|
END_STATE
|
|
|
|
START_STATE(fp64a_fp64_fpxxo_fpxx)
|
|
NEXT(fp64a, fp64_fpxx_fpxxo)
|
|
NEXT(fpxx, fp64a_fp64_fpxxo)
|
|
NEXT(fpxxo, fp64a_fp64_fpxx)
|
|
NEXT(fp64, fp64a_fpxx_fpxxo)
|
|
END_STATE
|
|
|
|
START_STATE(fp32_fp64a_fpxx)
|
|
NEXT(fp32, fp64a_fpxx)
|
|
NEXT(fp64a, fp32_fpxx)
|
|
NEXT(fpxx, fp64a_fp32)
|
|
END_STATE
|
|
|
|
START_STATE(fp32_fp64a_fpxxo)
|
|
NEXT(fp32, fp64a_fpxxo)
|
|
NEXT(fp64a, fp32_fpxxo)
|
|
NEXT(fpxxo, fp64a_fp32)
|
|
END_STATE
|
|
|
|
START_STATE(fp32_fp64a_fpxxo_fpxx)
|
|
NEXT(fp32, fp64a_fpxx_fpxxo)
|
|
NEXT(fp64a, fp32_fpxxo_fpxx)
|
|
NEXT(fpxx, fp32_fp64a_fpxxo)
|
|
NEXT(fpxxo, fp32_fp64a_fpxx)
|
|
END_STATE
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static int
|
|
mode_transition_valid_p (void)
|
|
{
|
|
int prev_fp_mode;
|
|
|
|
/* Get the current fp mode. */
|
|
prev_fp_mode = current_fp_mode;
|
|
#if HAVE_PRCTL_FP_MODE
|
|
current_fp_mode = prctl (PR_GET_FP_MODE);
|
|
|
|
/* If the prctl call fails assume the core only has FR0 mode support. */
|
|
if (current_fp_mode == -1)
|
|
current_fp_mode = 0;
|
|
#endif
|
|
|
|
if (!current_mode_valid_p (current_fp_state))
|
|
return 0;
|
|
|
|
/* Check if mode changes are not allowed but a mode change happened. */
|
|
if (cant_change_mode
|
|
&& current_fp_mode != prev_fp_mode)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Load OBJ and check that it was/was not loaded correctly. */
|
|
bool
|
|
load_object (enum fp_obj obj)
|
|
{
|
|
bool should_load = set_next_fp_state (obj);
|
|
|
|
shared_lib_ptrs[obj] = dlopen (shared_lib_names[obj], RTLD_LAZY);
|
|
|
|
/* If we expected an error and the load was successful then fail. */
|
|
if (!should_load && (shared_lib_ptrs[obj] != 0))
|
|
return false;
|
|
|
|
if (should_load && (shared_lib_ptrs[obj] == 0))
|
|
return false;
|
|
|
|
if (!mode_transition_valid_p ())
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/* Remove an object and check the state remains valid. */
|
|
bool
|
|
unload_object (enum fp_obj obj)
|
|
{
|
|
if (!shared_lib_ptrs[obj])
|
|
return true;
|
|
|
|
remove_object (obj);
|
|
|
|
if (dlclose (shared_lib_ptrs[obj]) != 0)
|
|
return false;
|
|
|
|
shared_lib_ptrs[obj] = 0;
|
|
|
|
if (!mode_transition_valid_p ())
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/* Load every permuation of OBJECTS. */
|
|
static bool
|
|
test_permutations (enum fp_obj objects[], int count)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0 ; i < count ; i++)
|
|
{
|
|
if (!load_object (objects[i]))
|
|
return false;
|
|
|
|
if (count > 1)
|
|
{
|
|
enum fp_obj new_objects[count - 1];
|
|
int j;
|
|
int k = 0;
|
|
|
|
for (j = 0 ; j < count ; j++)
|
|
{
|
|
if (j != i)
|
|
new_objects[k++] = objects[j];
|
|
}
|
|
|
|
if (!test_permutations (new_objects, count - 1))
|
|
return false;
|
|
}
|
|
|
|
if (!unload_object (objects[i]))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
int
|
|
do_test (void)
|
|
{
|
|
#if HAVE_PRCTL_FP_MODE
|
|
/* Determine available hardware support and current mode. */
|
|
current_fp_mode = prctl (PR_GET_FP_MODE);
|
|
|
|
/* If the prctl call fails assume the core only has FR0 mode support. */
|
|
if (current_fp_mode == -1)
|
|
current_fp_mode = 0;
|
|
else
|
|
{
|
|
if (prctl (PR_SET_FP_MODE, 0) != 0)
|
|
{
|
|
if (errno == ENOTSUP)
|
|
is_r6 = true;
|
|
else
|
|
{
|
|
printf ("unexpected error from PR_SET_FP_MODE, 0: %m\n");
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
if (prctl (PR_SET_FP_MODE, PR_FP_MODE_FR) != 0)
|
|
{
|
|
if (errno != ENOTSUP)
|
|
{
|
|
printf ("unexpected error from PR_SET_FP_MODE, "
|
|
"PR_FP_MODE_FR: %m\n");
|
|
return 1;
|
|
}
|
|
}
|
|
else
|
|
has_fr1 = true;
|
|
|
|
if (prctl (PR_SET_FP_MODE, PR_FP_MODE_FR | PR_FP_MODE_FRE) != 0)
|
|
{
|
|
if (errno != ENOTSUP)
|
|
{
|
|
printf ("unexpected error from PR_SET_FP_MODE, "
|
|
"PR_FP_MODE_FR | PR_FP_MODE_FRE: %m\n");
|
|
return 1;
|
|
}
|
|
}
|
|
else
|
|
has_fre = true;
|
|
|
|
if (prctl (PR_SET_FP_MODE, current_fp_mode) != 0)
|
|
{
|
|
printf ("unable to restore initial FP mode: %m\n");
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
if ((is_r6 && !(current_fp_mode & PR_FP_MODE_FR))
|
|
|| (!has_fr1 && (current_fp_mode & PR_FP_MODE_FR))
|
|
|| (!has_fre && (current_fp_mode & PR_FP_MODE_FRE)))
|
|
{
|
|
puts ("Inconsistency detected between initial FP mode "
|
|
"and supported FP modes\n");
|
|
return 1;
|
|
}
|
|
#else
|
|
current_fp_mode = 0;
|
|
#endif
|
|
|
|
/* Set up the initial state from executable and LDSO. Assumptions:
|
|
1) All system libraries have the same ABI as ld.so.
|
|
2) Due to the fact that ld.so is tested by invoking it directly
|
|
rather than via an interpreter, there is no point in varying
|
|
the ABI of the test program. Instead the ABI only varies for
|
|
the shared libraries which get loaded. */
|
|
if (!set_next_fp_state (FPABI_NATIVE))
|
|
{
|
|
puts ("Unable to enter initial ABI state\n");
|
|
return 1;
|
|
}
|
|
|
|
/* Compare the computed state with the hardware state. */
|
|
if (!mode_transition_valid_p ())
|
|
return 1;
|
|
|
|
/* Run all possible test permutations. */
|
|
if (!test_permutations (test_objects, FPABI_COUNT))
|
|
{
|
|
puts ("Mode checks failed\n");
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define TEST_FUNCTION do_test ()
|
|
#include "../../test-skeleton.c"
|