[PATCH bpf-next] selftests/bpf: make verifier loop tests arch independent

[Stanislav Fomichev]

Take the first x bytes of pt_regs for scalability tests, there is
no real reason we need x86 specific rax.

Signed-off-by: Stanislav Fomichev <s...@google.com>
---
 tools/testing/selftests/bpf/progs/loop1.c | 3 ++-
 tools/testing/selftests/bpf/progs/loop2.c | 3 ++-
 tools/testing/selftests/bpf/progs/loop3.c | 3 ++-
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/bpf/progs/loop1.c 
b/tools/testing/selftests/bpf/progs/loop1.c
index dea395af9ea9..d530c61d2517 100644
--- a/tools/testing/selftests/bpf/progs/loop1.c
+++ b/tools/testing/selftests/bpf/progs/loop1.c
@@ -14,11 +14,12 @@ SEC("raw_tracepoint/kfree_skb")
 int nested_loops(volatile struct pt_regs* ctx)
 {
        int i, j, sum = 0, m;
+       volatile int *any_reg = (volatile int *)ctx;
 
        for (j = 0; j < 300; j++)
                for (i = 0; i < j; i++) {
                        if (j & 1)
-                               m = ctx->rax;
+                               m = *any_reg;
                        else
                                m = j;
                        sum += i * m;
diff --git a/tools/testing/selftests/bpf/progs/loop2.c 
b/tools/testing/selftests/bpf/progs/loop2.c
index 0637bd8e8bcf..91bb89d901e3 100644
--- a/tools/testing/selftests/bpf/progs/loop2.c
+++ b/tools/testing/selftests/bpf/progs/loop2.c
@@ -14,9 +14,10 @@ SEC("raw_tracepoint/consume_skb")
 int while_true(volatile struct pt_regs* ctx)
 {
        int i = 0;
+       volatile int *any_reg = (volatile int *)ctx;
 
        while (true) {
-               if (ctx->rax & 1)
+               if (*any_reg & 1)
                        i += 3;
                else
                        i += 7;
diff --git a/tools/testing/selftests/bpf/progs/loop3.c 
b/tools/testing/selftests/bpf/progs/loop3.c
index 30a0f6cba080..3a7f12d7186c 100644
--- a/tools/testing/selftests/bpf/progs/loop3.c
+++ b/tools/testing/selftests/bpf/progs/loop3.c
@@ -14,9 +14,10 @@ SEC("raw_tracepoint/consume_skb")
 int while_true(volatile struct pt_regs* ctx)
 {
        __u64 i = 0, sum = 0;
+       volatile __u64 *any_reg = (volatile __u64 *)ctx;
        do {
                i++;
-               sum += ctx->rax;
+               sum += *any_reg;
        } while (i < 0x100000000ULL);
        return sum;
 }
-- 
2.22.0.410.gd8fdbe21b5-goog