#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"
SEC("xdp")
__description("meta access, test1")
__success __retval(0)
__naked void meta_access_test1(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \
r3 = *(u32*)(r1 + %[xdp_md_data]); \
r0 = r2; \
r0 += 8; \
if r0 > r3 goto l0_%=; \
r0 = *(u8*)(r2 + 0); \
l0_%=: r0 = 0; \
exit; \
" :
: __imm_const(xdp_md_data, offsetof(struct xdp_md, data)),
__imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta))
: __clobber_all);
}
SEC("xdp")
__description("meta access, test2")
__failure __msg("R0 min value is negative")
__naked void meta_access_test2(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \
r3 = *(u32*)(r1 + %[xdp_md_data]); \
r0 = r2; \
r0 -= 8; \
r4 = r2; \
r4 += 8; \
if r4 > r3 goto l0_%=; \
r0 = *(u8*)(r0 + 0); \
l0_%=: r0 = 0; \
exit; \
" :
: __imm_const(xdp_md_data, offsetof(struct xdp_md, data)),
__imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta))
: __clobber_all);
}
SEC("xdp")
__description("meta access, test3")
__failure __msg("invalid access to packet")
__naked void meta_access_test3(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \
r3 = *(u32*)(r1 + %[xdp_md_data_end]); \
r0 = r2; \
r0 += 8; \
if r0 > r3 goto l0_%=; \
r0 = *(u8*)(r2 + 0); \
l0_%=: r0 = 0; \
exit; \
" :
: __imm_const(xdp_md_data_end, offsetof(struct xdp_md, data_end)),
__imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta))
: __clobber_all);
}
SEC("xdp")
__description("meta access, test4")
__failure __msg("invalid access to packet")
__naked void meta_access_test4(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \
r3 = *(u32*)(r1 + %[xdp_md_data_end]); \
r4 = *(u32*)(r1 + %[xdp_md_data]); \
r0 = r4; \
r0 += 8; \
if r0 > r3 goto l0_%=; \
r0 = *(u8*)(r2 + 0); \
l0_%=: r0 = 0; \
exit; \
" :
: __imm_const(xdp_md_data, offsetof(struct xdp_md, data)),
__imm_const(xdp_md_data_end, offsetof(struct xdp_md, data_end)),
__imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta))
: __clobber_all);
}
SEC("xdp")
__description("meta access, test5")
__failure __msg("R3 !read_ok")
__naked void meta_access_test5(void)
{
asm volatile (" \
r3 = *(u32*)(r1 + %[xdp_md_data_meta]); \
r4 = *(u32*)(r1 + %[xdp_md_data]); \
r0 = r3; \
r0 += 8; \
if r0 > r4 goto l0_%=; \
r2 = -8; \
call %[bpf_xdp_adjust_meta]; \
r0 = *(u8*)(r3 + 0); \
l0_%=: r0 = 0; \
exit; \
" :
: __imm(bpf_xdp_adjust_meta),
__imm_const(xdp_md_data, offsetof(struct xdp_md, data)),
__imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta))
: __clobber_all);
}
SEC("xdp")
__description("meta access, test6")
__failure __msg("invalid access to packet")
__naked void meta_access_test6(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \
r3 = *(u32*)(r1 + %[xdp_md_data]); \
r0 = r3; \
r0 += 8; \
r4 = r2; \
r4 += 8; \
if r4 > r0 goto l0_%=; \
r0 = *(u8*)(r2 + 0); \
l0_%=: r0 = 0; \
exit; \
" :
: __imm_const(xdp_md_data, offsetof(struct xdp_md, data)),
__imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta))
: __clobber_all);
}
SEC("xdp")
__description("meta access, test7")
__success __retval(0)
__naked void meta_access_test7(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \
r3 = *(u32*)(r1 + %[xdp_md_data]); \
r0 = r3; \
r0 += 8; \
r4 = r2; \
r4 += 8; \
if r4 > r3 goto l0_%=; \
r0 = *(u8*)(r2 + 0); \
l0_%=: r0 = 0; \
exit; \
" :
: __imm_const(xdp_md_data, offsetof(struct xdp_md, data)),
__imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta))
: __clobber_all);
}
SEC("xdp")
__description("meta access, test8")
__success __retval(0)
__naked void meta_access_test8(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \
r3 = *(u32*)(r1 + %[xdp_md_data]); \
r4 = r2; \
r4 += 0xFFFF; \
if r4 > r3 goto l0_%=; \
r0 = *(u8*)(r2 + 0); \
l0_%=: r0 = 0; \
exit; \
" :
: __imm_const(xdp_md_data, offsetof(struct xdp_md, data)),
__imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta))
: __clobber_all);
}
SEC("xdp")
__description("meta access, test9")
__failure __msg("invalid access to packet")
__naked void meta_access_test9(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \
r3 = *(u32*)(r1 + %[xdp_md_data]); \
r4 = r2; \
r4 += 0xFFFF; \
r4 += 1; \
if r4 > r3 goto l0_%=; \
r0 = *(u8*)(r2 + 0); \
l0_%=: r0 = 0; \
exit; \
" :
: __imm_const(xdp_md_data, offsetof(struct xdp_md, data)),
__imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta))
: __clobber_all);
}
SEC("xdp")
__description("meta access, test10")
__failure __msg("invalid access to packet")
__naked void meta_access_test10(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \
r3 = *(u32*)(r1 + %[xdp_md_data]); \
r4 = *(u32*)(r1 + %[xdp_md_data_end]); \
r5 = 42; \
r6 = 24; \
*(u64*)(r10 - 8) = r5; \
lock *(u64 *)(r10 - 8) += r6; \
r5 = *(u64*)(r10 - 8); \
if r5 > 100 goto l0_%=; \
r3 += r5; \
r5 = r3; \
r6 = r2; \
r6 += 8; \
if r6 > r5 goto l0_%=; \
r2 = *(u8*)(r2 + 0); \
l0_%=: r0 = 0; \
exit; \
" :
: __imm_const(xdp_md_data, offsetof(struct xdp_md, data)),
__imm_const(xdp_md_data_end, offsetof(struct xdp_md, data_end)),
__imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta))
: __clobber_all);
}
SEC("xdp")
__description("meta access, test11")
__success __retval(0)
__naked void meta_access_test11(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \
r3 = *(u32*)(r1 + %[xdp_md_data]); \
r5 = 42; \
r6 = 24; \
*(u64*)(r10 - 8) = r5; \
lock *(u64 *)(r10 - 8) += r6; \
r5 = *(u64*)(r10 - 8); \
if r5 > 100 goto l0_%=; \
r2 += r5; \
r5 = r2; \
r6 = r2; \
r6 += 8; \
if r6 > r3 goto l0_%=; \
r5 = *(u8*)(r5 + 0); \
l0_%=: r0 = 0; \
exit; \
" :
: __imm_const(xdp_md_data, offsetof(struct xdp_md, data)),
__imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta))
: __clobber_all);
}
SEC("xdp")
__description("meta access, test12")
__success __retval(0)
__naked void meta_access_test12(void)
{
asm volatile (" \
r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \
r3 = *(u32*)(r1 + %[xdp_md_data]); \
r4 = *(u32*)(r1 + %[xdp_md_data_end]); \
r5 = r3; \
r5 += 16; \
if r5 > r4 goto l0_%=; \
r0 = *(u8*)(r3 + 0); \
r5 = r2; \
r5 += 16; \
if r5 > r3 goto l0_%=; \
r0 = *(u8*)(r2 + 0); \
l0_%=: r0 = 0; \
exit; \
" :
: __imm_const(xdp_md_data, offsetof(struct xdp_md, data)),
__imm_const(xdp_md_data_end, offsetof(struct xdp_md, data_end)),
__imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta))
: __clobber_all);
}
char _license[] SEC("license") = "GPL";
