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author | Taylor Simpson <tsimpson@quicinc.com> | 2021-10-04 19:12:31 -0500 |
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committer | Taylor Simpson <tsimpson@quicinc.com> | 2021-10-28 22:22:49 -0500 |
commit | b9dd6ff91d29b9e38afd7facf1d683f34bd1ec10 (patch) | |
tree | 3545ca5315862dad7b2d90b681cc3f016bc71f1f /tests | |
parent | f448397a512189e726f5e8026c89ce7fc4392377 (diff) | |
download | qemu-b9dd6ff91d29b9e38afd7facf1d683f34bd1ec10.zip qemu-b9dd6ff91d29b9e38afd7facf1d683f34bd1ec10.tar.gz qemu-b9dd6ff91d29b9e38afd7facf1d683f34bd1ec10.tar.bz2 |
Hexagon (target/hexagon) put writes to USR into temp until commit
Change SET_USR_FIELD to write to hex_new_value[HEX_REG_USR] instead
of hex_gpr[HEX_REG_USR].
Then, we need code to mark the instructions that can set implicitly
set USR
- Macros added to hex_common.py
- A_FPOP added in translate.c
Test case added in tests/tcg/hexagon/overflow.c
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Diffstat (limited to 'tests')
-rw-r--r-- | tests/tcg/hexagon/Makefile.target | 1 | ||||
-rw-r--r-- | tests/tcg/hexagon/overflow.c | 107 |
2 files changed, 108 insertions, 0 deletions
diff --git a/tests/tcg/hexagon/Makefile.target b/tests/tcg/hexagon/Makefile.target index c1e1650..8b07a28 100644 --- a/tests/tcg/hexagon/Makefile.target +++ b/tests/tcg/hexagon/Makefile.target @@ -40,5 +40,6 @@ HEX_TESTS += load_unpack HEX_TESTS += load_align HEX_TESTS += atomics HEX_TESTS += fpstuff +HEX_TESTS += overflow TESTS += $(HEX_TESTS) diff --git a/tests/tcg/hexagon/overflow.c b/tests/tcg/hexagon/overflow.c new file mode 100644 index 0000000..196fcf7 --- /dev/null +++ b/tests/tcg/hexagon/overflow.c @@ -0,0 +1,107 @@ +/* + * Copyright(c) 2021 Qualcomm Innovation Center, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + */ + +#include <stdlib.h> +#include <stdio.h> +#include <unistd.h> +#include <sys/types.h> +#include <fcntl.h> +#include <setjmp.h> +#include <signal.h> + + +int err; + +static void __check(const char *filename, int line, int x, int expect) +{ + if (x != expect) { + printf("ERROR %s:%d - %d != %d\n", + filename, line, x, expect); + err++; + } +} + +#define check(x, expect) __check(__FILE__, __LINE__, (x), (expect)) + +static int satub(int src, int *p, int *ovf_result) +{ + int result; + int usr; + + /* + * This instruction can set bit 0 (OVF/overflow) in usr + * Clear the bit first, then return that bit to the caller + * + * We also store the src into *p in the same packet, so we + * can ensure the overflow doesn't get set when an exception + * is generated. + */ + asm volatile("r2 = usr\n\t" + "r2 = clrbit(r2, #0)\n\t" /* clear overflow bit */ + "usr = r2\n\t" + "{\n\t" + " %0 = satub(%2)\n\t" + " memw(%3) = %2\n\t" + "}\n\t" + "%1 = usr\n\t" + : "=r"(result), "=r"(usr) + : "r"(src), "r"(p) + : "r2", "usr", "memory"); + *ovf_result = (usr & 1); + return result; +} + +int read_usr_overflow(void) +{ + int result; + asm volatile("%0 = usr\n\t" : "=r"(result)); + return result & 1; +} + + +jmp_buf jmp_env; +int usr_overflow; + +static void sig_segv(int sig, siginfo_t *info, void *puc) +{ + usr_overflow = read_usr_overflow(); + longjmp(jmp_env, 1); +} + +int main() +{ + struct sigaction act; + int ovf; + + /* SIGSEGV test */ + act.sa_sigaction = sig_segv; + sigemptyset(&act.sa_mask); + act.sa_flags = SA_SIGINFO; + sigaction(SIGSEGV, &act, NULL); + if (setjmp(jmp_env) == 0) { + satub(300, 0, &ovf); + } + + act.sa_handler = SIG_DFL; + sigemptyset(&act.sa_mask); + act.sa_flags = 0; + + check(usr_overflow, 0); + + puts(err ? "FAIL" : "PASS"); + return err ? EXIT_FAILURE : EXIT_SUCCESS; +} |