[dpdk-dev] [PATCH 03/22] cmdline: add alignment constraint

[Adrien Mazarguil]

This prevents sigbus errors on architectures that cannot handle unexpected
unaligned accesses to the output buffer.

Signed-off-by: Adrien Mazarguil <adrien.mazarguil at 6wind.com>
---
 lib/librte_cmdline/cmdline_parse.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/lib/librte_cmdline/cmdline_parse.c 
b/lib/librte_cmdline/cmdline_parse.c
index 14f5553..763c286 100644
--- a/lib/librte_cmdline/cmdline_parse.c
+++ b/lib/librte_cmdline/cmdline_parse.c
@@ -255,7 +255,10 @@ cmdline_parse(struct cmdline *cl, const char * buf)
        unsigned int inst_num=0;
        cmdline_parse_inst_t *inst;
        const char *curbuf;
-       char result_buf[CMDLINE_PARSE_RESULT_BUFSIZE];
+       union {
+               char buf[CMDLINE_PARSE_RESULT_BUFSIZE];
+               long double align; /* strong alignment constraint for buf */
+       } result;
        cmdline_parse_token_hdr_t *dyn_tokens[CMDLINE_PARSE_DYNAMIC_TOKENS];
        void (*f)(void *, struct cmdline *, void *) = NULL;
        void *data = NULL;
@@ -318,7 +321,7 @@ cmdline_parse(struct cmdline *cl, const char * buf)
                debug_printf("INST %d\n", inst_num);

                /* fully parsed */
-               tok = match_inst(inst, buf, 0, result_buf, sizeof(result_buf),
+               tok = match_inst(inst, buf, 0, result.buf, sizeof(result.buf),
                                 &dyn_tokens);

                if (tok > 0) /* we matched at least one token */
@@ -353,7 +356,7 @@ cmdline_parse(struct cmdline *cl, const char * buf)

        /* call func */
        if (f) {
-               f(result_buf, cl, data);
+               f(result.buf, cl, data);
        }

        /* no match */
-- 
2.1.4