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reduce the binary size of libpcap based programs that don't use bpf parsing

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SVN-Revision: 13686
This commit is contained in:
Felix Fietkau 2008-12-19 06:35:23 +00:00
parent c3f7c0f121
commit 78babdb954
2 changed files with 119 additions and 1 deletions
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3
package/libpcap/Makefile
View File

@ -30,7 +30,8 @@ define Package/libpcap/description
packet capture.
endef
TARGET_CFLAGS += $(FPIC)
TARGET_CFLAGS += \
-ffunction-sections -fdata-sections
CONFIGURE_ARGS += \
--enable-shared \

117
package/libpcap/patches/105-space_optimization.patch Normal file
View File

@ -0,0 +1,117 @@
--- a/gencode.c
+++ b/gencode.c
@@ -429,20 +429,6 @@ pcap_compile_nopcap(int snaplen_arg, int
}
/*
- * Clean up a "struct bpf_program" by freeing all the memory allocated
- * in it.
- */
-void
-pcap_freecode(struct bpf_program *program)
-{
- program->bf_len = 0;
- if (program->bf_insns != NULL) {
- free((char *)program->bf_insns);
- program->bf_insns = NULL;
- }
-}
-
-/*
* Backpatch the blocks in 'list' to 'target'. The 'sense' field indicates
* which of the jt and jf fields has been resolved and which is a pointer
* back to another unresolved block (or nil). At least one of the fields
--- a/optimize.c
+++ b/optimize.c
@@ -2263,36 +2263,6 @@ icode_to_fcode(root, lenp)
return fp;
}
-/*
- * Make a copy of a BPF program and put it in the "fcode" member of
- * a "pcap_t".
- *
- * If we fail to allocate memory for the copy, fill in the "errbuf"
- * member of the "pcap_t" with an error message, and return -1;
- * otherwise, return 0.
- */
-int
-install_bpf_program(pcap_t *p, struct bpf_program *fp)
-{
- size_t prog_size;
-
- /*
- * Free up any already installed program.
- */
- pcap_freecode(&p->fcode);
-
- prog_size = sizeof(*fp->bf_insns) * fp->bf_len;
- p->fcode.bf_len = fp->bf_len;
- p->fcode.bf_insns = (struct bpf_insn *)malloc(prog_size);
- if (p->fcode.bf_insns == NULL) {
- snprintf(p->errbuf, sizeof(p->errbuf),
- "malloc: %s", pcap_strerror(errno));
- return (-1);
- }
- memcpy(p->fcode.bf_insns, fp->bf_insns, prog_size);
- return (0);
-}
-
#ifdef BDEBUG
static void
opt_dump(root)
--- a/pcap.c
+++ b/pcap.c
@@ -463,6 +463,52 @@ static const u_char charmap[] = {
(u_char)'\374', (u_char)'\375', (u_char)'\376', (u_char)'\377',
};
+/*
+ * Clean up a "struct bpf_program" by freeing all the memory allocated
+ * in it.
+ */
+void
+pcap_freecode(struct bpf_program *program)
+{
+ program->bf_len = 0;
+ if (program->bf_insns != NULL) {
+ free((char *)program->bf_insns);
+ program->bf_insns = NULL;
+ }
+}
+
+
+/*
+ * Make a copy of a BPF program and put it in the "fcode" member of
+ * a "pcap_t".
+ *
+ * If we fail to allocate memory for the copy, fill in the "errbuf"
+ * member of the "pcap_t" with an error message, and return -1;
+ * otherwise, return 0.
+ */
+int
+install_bpf_program(pcap_t *p, struct bpf_program *fp)
+{
+ size_t prog_size;
+
+ /*
+ * Free up any already installed program.
+ */
+ pcap_freecode(&p->fcode);
+
+ prog_size = sizeof(*fp->bf_insns) * fp->bf_len;
+ p->fcode.bf_len = fp->bf_len;
+ p->fcode.bf_insns = (struct bpf_insn *)malloc(prog_size);
+ if (p->fcode.bf_insns == NULL) {
+ snprintf(p->errbuf, sizeof(p->errbuf),
+ "malloc: %s", pcap_strerror(errno));
+ return (-1);
+ }
+ memcpy(p->fcode.bf_insns, fp->bf_insns, prog_size);
+ return (0);
+}
+
+
int
pcap_strcasecmp(const char *s1, const char *s2)
{