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authorAnanth N Mavinakayanahalli <ananth@in.ibm.com>2006-10-02 13:17:30 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-02 18:57:16 +0400
commit3a872d89baae821a0f6e2c1055d4b47650661137 (patch)
tree5ac6aa55e04960e02f25ff5079078f975957b1b3 /net/ipv4/tcp_probe.c
parent782237a2418e2561a87c86a4832726931adce737 (diff)
downloadlinux-3a872d89baae821a0f6e2c1055d4b47650661137.tar.xz
[PATCH] Kprobes: Make kprobe modules more portable
In an effort to make kprobe modules more portable, here is a patch that: o Introduces the "symbol_name" field to struct kprobe. The symbol->address resolution now happens in the kernel in an architecture agnostic manner. 64-bit powerpc users no longer have to specify the ".symbols" o Introduces the "offset" field to struct kprobe to allow a user to specify an offset into a symbol. o The legacy mechanism of specifying the kprobe.addr is still supported. However, if both the kprobe.addr and kprobe.symbol_name are specified, probe registration fails with an -EINVAL. o The symbol resolution code uses kallsyms_lookup_name(). So CONFIG_KPROBES now depends on CONFIG_KALLSYMS o Apparantly kprobe modules were the only legitimate out-of-tree user of the kallsyms_lookup_name() EXPORT. Now that the symbol resolution happens in-kernel, remove the EXPORT as suggested by Christoph Hellwig o Modify tcp_probe.c that uses the kprobe interface so as to make it work on multiple platforms (in its earlier form, the code wouldn't work, say, on powerpc) Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Prasanna S Panchamukhi <prasanna@in.ibm.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'net/ipv4/tcp_probe.c')
-rw-r--r--net/ipv4/tcp_probe.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/net/ipv4/tcp_probe.c b/net/ipv4/tcp_probe.c
index dab37d2f65fc..4be336f17883 100644
--- a/net/ipv4/tcp_probe.c
+++ b/net/ipv4/tcp_probe.c
@@ -99,8 +99,10 @@ static int jtcp_sendmsg(struct kiocb *iocb, struct sock *sk,
}
static struct jprobe tcp_send_probe = {
- .kp = { .addr = (kprobe_opcode_t *) &tcp_sendmsg, },
- .entry = (kprobe_opcode_t *) &jtcp_sendmsg,
+ .kp = {
+ .symbol_name = "tcp_sendmsg",
+ },
+ .entry = JPROBE_ENTRY(jtcp_sendmsg),
};