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authorFelix Fietkau <nbd@openwrt.org>2008-12-19 06:35:23 +0000
committerFelix Fietkau <nbd@openwrt.org>2008-12-19 06:35:23 +0000
commit78babdb9542fae95a5b890a57630af7bcc22d61b (patch)
tree328a5b3acfa8eee38184288358fb2cfbcfb4fd9d
parentc3f7c0f12118553f5485640f6ad1404dea849b60 (diff)
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reduce the binary size of libpcap based programs that don't use bpf parsing
SVN-Revision: 13686
-rw-r--r--package/libpcap/Makefile3
-rw-r--r--package/libpcap/patches/105-space_optimization.patch117
2 files changed, 119 insertions, 1 deletions
diff --git a/package/libpcap/Makefile b/package/libpcap/Makefile
index cf0304b..620fdb9 100644
--- a/package/libpcap/Makefile
+++ b/package/libpcap/Makefile
@@ -30,7 +30,8 @@ define Package/libpcap/description
packet capture.
endef
-TARGET_CFLAGS += $(FPIC)
+TARGET_CFLAGS += \
+ -ffunction-sections -fdata-sections
CONFIGURE_ARGS += \
--enable-shared \
diff --git a/package/libpcap/patches/105-space_optimization.patch b/package/libpcap/patches/105-space_optimization.patch
new file mode 100644
index 0000000..17265cd
--- /dev/null
+++ b/package/libpcap/patches/105-space_optimization.patch
@@ -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)
+ {