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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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fa7f7e7354
Adds a test for minimal jit_write_elf functionality. Committer testing: # perf test jit 61: Test jit_write_elf : Ok # # perf test -v jit 61: Test jit_write_elf : --- start --- test child forked, pid 10460 Writing jit code to: /tmp/perf-test-KqxURR test child finished with 0 ---- end ---- Test jit_write_elf: Ok # Committer notes: Fix up the case where HAVE_JITDUMP is no defined. Signed-off-by: Ian Rogers <irogers@google.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexios Zavras <alexios.zavras@intel.com> Cc: Allison Randal <allison@lohutok.net> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Song Liu <songliubraving@fb.com> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lore.kernel.org/lkml/20191126235913.41855-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
52 lines
995 B
C
52 lines
995 B
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <limits.h>
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#include <stdio.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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#include <linux/compiler.h>
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#include "debug.h"
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#include "tests.h"
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#ifdef HAVE_JITDUMP
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#include <libelf.h>
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#include "../util/genelf.h"
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#endif
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#define TEMPL "/tmp/perf-test-XXXXXX"
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int test__jit_write_elf(struct test *test __maybe_unused,
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int subtest __maybe_unused)
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{
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#ifdef HAVE_JITDUMP
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static unsigned char x86_code[] = {
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0xBB, 0x2A, 0x00, 0x00, 0x00, /* movl $42, %ebx */
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0xB8, 0x01, 0x00, 0x00, 0x00, /* movl $1, %eax */
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0xCD, 0x80 /* int $0x80 */
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};
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char path[PATH_MAX];
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int fd, ret;
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strcpy(path, TEMPL);
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fd = mkstemp(path);
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if (fd < 0) {
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perror("mkstemp failed");
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return TEST_FAIL;
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}
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pr_info("Writing jit code to: %s\n", path);
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ret = jit_write_elf(fd, 0, "main", x86_code, sizeof(x86_code),
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NULL, 0, NULL, 0, 0);
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close(fd);
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unlink(path);
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return ret ? TEST_FAIL : 0;
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#else
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return TEST_SKIP;
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#endif
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}
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