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// SPDX-License-Identifier: GPL-2.0
#include <vmlinux.h>
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
#include "../test_kmods/bpf_testmod.h"
#include "bpf_misc.h"
char _license[] SEC("license") = "GPL";
long val;
/* On a private stack every frame gets the whole 2 KiB budget. */
__used __naked
static long frame_2048_leaf(void)
{
asm volatile (" \
r1 = 30; \
*(u64 *)(r10 - 2048) = r1; \
r1 = 12; \
*(u64 *)(r10 - 8) = r1; \
r0 = *(u64 *)(r10 - 2048); \
r1 = *(u64 *)(r10 - 8); \
r0 += r1; \
exit; \
" ::: __clobber_all);
}
/* test_1 is the member bpf_testmod requests a private stack for */
SEC("struct_ops")
__naked int test_1(void)
{
asm volatile (" \
r1 = 100; \
*(u64 *)(r10 - 2048) = r1; \
call frame_2048_leaf; \
r1 = *(u64 *)(r10 - 2048); \
r0 += r1; \
r1 = %[val] ll; \
*(u64 *)(r1 + 0) = r0; \
r0 = 0; \
exit; \
" :
: __imm_addr(val)
: __clobber_all);
}
SEC(".struct_ops")
struct bpf_testmod_ops3 testmod_1 = {
.test_1 = (void *)test_1,
};
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