forked from Imagelibrary/binutils-gdb
16582a51c6
Add 5 SVE/SME tests to exercise all the new features like reading/writing registers, pseudo-registers, signal frames and core files. - Sanity check for SME: Gives a brief smoke test to make sure the most basic of features are working correctly. - ZA unavailability tests: Validates the behavior/content of the ZA register is correct when no payload is available. It also exercises changing the vector lengths. - ZA availability tests: These tests exercise reading/writing to all the possible ZA pseudo-registers, and validates the state is correct. - Core file tests: Validates that core file reading and writing works correctly and that all state dumped/loaded is sane. This is exercised for both Linux Kernel core files and gcore core files. - Signal frame tests: Validates the correct restoration of SME/SVE/FPSIMD values across signal frames. Since some of these tests are very lengthy and take a little while to run (under QEMU at the moment), I decided to parallelize them into smaller chunks so we can throw some more CPU power at them so they run faster. I'd still like to add a few more tests to give the testsuite more coverage in the areas of SME/SVE. Hopefully in the near future that will happen. Just a reminder that these SME tests are currently unsupported when gdb is connected to a remote target. That's because the RSP doesn't support communicating changes in vector lenghts mid-execution, so gdb will always get wrong state from the remote target. Co-Authored-By: Ezra Sitorus <ezra.sitorus@arm.com> Reviewed-by: Thiago Jung Bauermann <thiago.bauermann@linaro.org>
91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2023 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* AArch64 SVE feature check. This test serves as a way for the GDB testsuite
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to verify that a target supports SVE at runtime, and also reports data
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about the various supported SVE vector lengths. */
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#include <stdio.h>
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#include <sys/auxv.h>
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#include <sys/prctl.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#ifndef HWCAP_SVE
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#define HWCAP_SVE (1 << 22)
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#endif
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#ifndef PR_SVE_SET_VL
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#define PR_SVE_SET_VL 50
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#define PR_SVE_GET_VL 51
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#define PR_SVE_VL_LEN_MASK 0xffff
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#endif
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static int get_vl_size ()
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{
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int res = prctl (PR_SVE_GET_VL, 0, 0, 0, 0);
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if (res < 0)
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return -1;
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return (res & PR_SVE_VL_LEN_MASK);
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}
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static int set_vl_size (int new_vl)
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{
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if (prctl (PR_SVE_SET_VL, new_vl, 0, 0, 0, 0) < 0)
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return -1;
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if (get_vl_size () != new_vl)
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return -1;
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return 0;
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}
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static void
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dummy ()
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{
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}
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#define VL_MIN 16
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#define VL_MAX 256
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#define VL_INCREMENT 16
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int
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main (int argc, char **argv)
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{
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/* Number of supported SVE vector lengths. */
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size_t supported_vl_count = 0;
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/* Vector containing the various supported SVE vector lengths. */
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size_t supported_vl[16];
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if (getauxval (AT_HWCAP) & HWCAP_SVE)
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{
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for (int vl = VL_MIN; vl <= VL_MAX; vl += VL_INCREMENT)
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{
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if (set_vl_size (vl) == 0)
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{
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supported_vl[supported_vl_count] = vl;
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supported_vl_count++;
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}
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}
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}
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return 0; /* stop here */
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}
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