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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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C
at master
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152// 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 __nakedstatic 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,};