From c9819077700c5fc440981c3b14e21225f4c14d01 Mon Sep 17 00:00:00 2001 From: Ilya Leoshkevich Date: Thu, 4 May 2023 08:35:30 +0200 Subject: [PATCH] gas: fix building tc-bpf.c on s390x char is unsigned on s390x, so there are a lot of warnings like: gas/config/tc-bpf.c: In function 'get_token': gas/config/tc-bpf.c:900:14: error: comparison is always false due to limited range of data type [-Werror=type-limits] 900 | if (ch == EOF || len > MAX_TOKEN_SZ) | ^~ Change its type to int, like in the other similar code. There is also: gas/config/tc-bpf.c:735:30: error: 'bpf_endianness' may be used uninitialized in this function [-Werror=maybe-uninitialized] 735 | dst, be ? size[endianness - BPF_BE16] : size[endianness - BPF_LE16]); | ~~~~~~~~~~~^~~~~~~~~~ -Wmaybe-uninitialized doesn't seem to understand the FSM; just initialize bpf_endianness to silence it. Add an assertion to build_bpf_endianness() in order to catch potential bugs. --- gas/config/tc-bpf.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/gas/config/tc-bpf.c b/gas/config/tc-bpf.c index 171fc682806..3b86f9c89cb 100644 --- a/gas/config/tc-bpf.c +++ b/gas/config/tc-bpf.c @@ -730,6 +730,8 @@ build_bpf_endianness (char *dst, enum bpf_token_type endianness) || endianness == BPF_LE32 || endianness == BPF_LE64) be = 0; + else + gas_assert (endianness == BPF_BE16 || endianness == BPF_BE32 || endianness == BPF_BE64); bpf_insn = xasprintf ("%s %%%s,%s", be ? "endbe" : "endle", dst, be ? size[endianness - BPF_BE16] : size[endianness - BPF_LE16]); @@ -885,7 +887,7 @@ get_token (const char **insn, char *token, size_t *tlen) } while (0) const char *str = *insn; - char ch, ch2 = 0; + int ch, ch2 = 0; enum bpf_token_type ttype = BPF_UNKNOWN; size_t len = 0; const char *expr = NULL; @@ -1362,7 +1364,7 @@ bpf_pseudoc_to_normal_syntax (const char *str, char **errmsg) } while (0) enum bpf_token_type ttype; - enum bpf_token_type bpf_endianness, + enum bpf_token_type bpf_endianness = BPF_UNKNOWN, bpf_atomic_insn; enum bpf_token_type bpf_jmp_op = BPF_JEQ; /* Arbitrary. */ enum bpf_token_type bpf_cast = BPF_CAST_U8; /* Arbitrary. */ -- 2.30.2