From 8d4a52c3921d278f27241fc0c6949d8fdc13a7f5 Mon Sep 17 00:00:00 2001 From: David Rheinsberg Date: Tue, 24 Jan 2023 12:04:59 +0100 Subject: [PATCH] x86/insn_decoder_test: allow longer symbol-names Increase the allowed line-length of the insn-decoder-test to 4k to allow for symbol-names longer than 256 characters. The insn-decoder-test takes objdump output as input, which may contain symbol-names as instruction arguments. With rust-code entering the kernel, those symbol-names will include mangled-symbols which might exceed the current line-length-limit of the tool. By bumping the line-length-limit of the tool to 4k, we get a reasonable buffer for all objdump outputs I have seen so far. Unfortunately, ELF symbol-names are not restricted in length, so technically this might still end up failing if we encounter longer names in the future. My compile-failure looks like this: arch/x86/tools/insn_decoder_test: error: malformed line 1152000: tBb_+0xf2> ..which overflowed by 10 characters reading this line: ffffffff81458193: 74 3d je ffffffff814581d2 <_RNvXse_NtNtNtCshGpAVYOtgW1_4core4iter8adapters7flattenINtB5_13FlattenCompatINtNtB7_3map3MapNtNtNtBb_3str4iter5CharsNtB1v_17CharEscapeDefaultENtNtBb_4char13EscapeDefaultENtNtBb_3fmt5Debug3fmtBb_+0xf2> Signed-off-by: David Rheinsberg Signed-off-by: Scott Weaver --- arch/x86/tools/insn_decoder_test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/tools/insn_decoder_test.c b/arch/x86/tools/insn_decoder_test.c index 472540aeabc23..366e07546344b 100644 --- a/arch/x86/tools/insn_decoder_test.c +++ b/arch/x86/tools/insn_decoder_test.c @@ -106,7 +106,7 @@ static void parse_args(int argc, char **argv) } } -#define BUFSIZE 256 +#define BUFSIZE 4096 int main(int argc, char **argv) { -- GitLab