From 9999e48639b3cecb08ffb37358bcba3b48161b29 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 08:50:17 +0000
Subject: [PATCH] add ax88772_rst
---
kernel/tools/perf/util/llvm-utils.c | 25 ++++++++++++++++++++++++-
1 files changed, 24 insertions(+), 1 deletions(-)
diff --git a/kernel/tools/perf/util/llvm-utils.c b/kernel/tools/perf/util/llvm-utils.c
index 0bf6b4d..570cde4 100644
--- a/kernel/tools/perf/util/llvm-utils.c
+++ b/kernel/tools/perf/util/llvm-utils.c
@@ -525,14 +525,37 @@
pr_debug("llvm compiling command template: %s\n", template);
+ /*
+ * Below, substitute control characters for values that can cause the
+ * echo to misbehave, then substitute the values back.
+ */
err = -ENOMEM;
- if (asprintf(&command_echo, "echo -n \"%s\"", template) < 0)
+ if (asprintf(&command_echo, "echo -n \a%s\a", template) < 0)
goto errout;
+#define SWAP_CHAR(a, b) do { if (*p == a) *p = b; } while (0)
+ for (char *p = command_echo; *p; p++) {
+ SWAP_CHAR('<', '\001');
+ SWAP_CHAR('>', '\002');
+ SWAP_CHAR('"', '\003');
+ SWAP_CHAR('\'', '\004');
+ SWAP_CHAR('|', '\005');
+ SWAP_CHAR('&', '\006');
+ SWAP_CHAR('\a', '"');
+ }
err = read_from_pipe(command_echo, (void **) &command_out, NULL);
if (err)
goto errout;
+ for (char *p = command_out; *p; p++) {
+ SWAP_CHAR('\001', '<');
+ SWAP_CHAR('\002', '>');
+ SWAP_CHAR('\003', '"');
+ SWAP_CHAR('\004', '\'');
+ SWAP_CHAR('\005', '|');
+ SWAP_CHAR('\006', '&');
+ }
+#undef SWAP_CHAR
pr_debug("llvm compiling command : %s\n", command_out);
err = read_from_pipe(template, &obj_buf, &obj_buf_sz);
--
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