Re: [6/6] ppc: ebpf/jit: Implement JIT compiler for extended BPF

On 2016/06/21 09:38AM, Michael Ellerman wrote:

On Sun, 2016-06-19 at 23:06 +0530, Naveen N. Rao wrote:

quoted

On 2016/06/17 10:53PM, Michael Ellerman wrote:

quoted

On Tue, 2016-07-06 at 13:32:23 UTC, "Naveen N. Rao" wrote:

quoted

diff --git a/arch/powerpc/net/bpf_jit_comp64.c b/arch/powerpc/net/bpf_jit_comp64.c
new file mode 100644
index 0000000..954ff53
--- /dev/null
+++ b/arch/powerpc/net/bpf_jit_comp64.c

@@ -0,0 +1,956 @@

...

quoted

quoted

quoted

+
+static void bpf_jit_fill_ill_insns(void *area, unsigned int size)
+{
+	int *p = area;
+
+	/* Fill whole space with trap instructions */
+	while (p < (int *)((char *)area + size))
+		*p++ = BREAKPOINT_INSTRUCTION;
+}

This breaks the build for some configs, presumably you're missing a header:

  arch/powerpc/net/bpf_jit_comp64.c:30:10: error: 'BREAKPOINT_INSTRUCTION' undeclared (first use in this function)

http://kisskb.ellerman.id.au/kisskb/buildresult/12720611/

Oops. Yes, I should have caught that. I need to add:

#include <asm/kprobes.h>

in bpf_jit_comp64.c

Can you please check if it resolves the build error?

Can you? :D

:)
Sorry, I should have explained myself better. I did actually try your 
config and I was able to reproduce the build error. After the above 
#include, that error went away, but I saw some vdso related errors. I 
thought I was doing something wrong and needed a different setup for 
that particular kernel config, which is why I requested your help in the 
matter. I just didn't do a good job of putting across that message...

Note to self: randconfig builds *and* more time drafting emails :)

Do you want me to respin the patches?


Thanks,
Naveen