perf tools: Remove dependency on libaudit

All architectures now support HAVE_SYSCALL_TABLE_SUPPORT, so the flag is
no longer needed. With the removal of the flag, the related
GENERIC_SYSCALL_TABLE can also be removed.

libaudit was only used as a fallback for when HAVE_SYSCALL_TABLE_SUPPORT
was not defined, so libaudit is also no longer needed for any
architecture.

Signed-off-by: Charlie Jenkins <charlie@rivosinc.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: Arnd Bergmann <arnd@arndb.de>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Guo Ren <guoren@kernel.org>
Cc: Günther Noack <gnoack@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mickaël Salaün <mic@digikod.net>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20250108-perf_syscalltbl-v6-16-7543b5293098@rivosinc.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 0 insertions, 30 deletions

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index fc257d5e8144..6f5ae3ac0638 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -2073,30 +2073,11 @@ static int trace__read_syscall_info(struct trace *trace, int id)
 	const char *name = syscalltbl__name(trace->sctbl, id);
 	int err;
 
-#ifdef HAVE_SYSCALL_TABLE_SUPPORT
 	if (trace->syscalls.table == NULL) {
 		trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc));
 		if (trace->syscalls.table == NULL)
 			return -ENOMEM;
 	}
-#else
-	if (id > trace->sctbl->syscalls.max_id || (id == 0 && trace->syscalls.table == NULL)) {
-		// When using libaudit we don't know beforehand what is the max syscall id
-		struct syscall *table = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
-
-		if (table == NULL)
-			return -ENOMEM;
-
-		// Need to memset from offset 0 and +1 members if brand new
-		if (trace->syscalls.table == NULL)
-			memset(table, 0, (id + 1) * sizeof(*sc));
-		else
-			memset(table + trace->sctbl->syscalls.max_id + 1, 0, (id - trace->sctbl->syscalls.max_id) * sizeof(*sc));
-
-		trace->syscalls.table	      = table;
-		trace->sctbl->syscalls.max_id = id;
-	}
-#endif
 	sc = trace->syscalls.table + id;
 	if (sc->nonexistent)
 		return -EEXIST;
@@ -2447,18 +2428,7 @@ static struct syscall *trace__syscall_info(struct trace *trace,
 
 	err = -EINVAL;
 
-#ifdef HAVE_SYSCALL_TABLE_SUPPORT
 	if (id > trace->sctbl->syscalls.max_id) {
-#else
-	if (id >= trace->sctbl->syscalls.max_id) {
-		/*
-		 * With libaudit we don't know beforehand what is the max_id,
-		 * so we let trace__read_syscall_info() figure that out as we
-		 * go on reading syscalls.
-		 */
-		err = trace__read_syscall_info(trace, id);
-		if (err)
-#endif
 		goto out_cant_read;
 	}