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// SPDX-License-Identifier: GPL-2.0
#include <vmlinux.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"
#if defined(__TARGET_ARCH_x86)
int percpu_data SEC(".percpu");
/*
* An ld_imm64 of a per-CPU map value is followed by a mov_percpu_addr that
* reuses the same register, so check that the add resolves into the register
* the address was loaded into, for every register.
*/
SEC("raw_tp")
__description("per-CPU address resolution")
__success
__arch_x86_64
__jited(" movabsq $0x{{.*}}, %rax")
__jited(" addq %gs:{{.*}}, %rax")
__jited(" movabsq $0x{{.*}}, %rdi")
__jited(" addq %gs:{{.*}}, %rdi")
__jited(" movabsq $0x{{.*}}, %rsi")
__jited(" addq %gs:{{.*}}, %rsi")
__jited(" movabsq $0x{{.*}}, %rdx")
__jited(" addq %gs:{{.*}}, %rdx")
__jited(" movabsq $0x{{.*}}, %rcx")
__jited(" addq %gs:{{.*}}, %rcx")
__jited(" movabsq $0x{{.*}}, %r8")
__jited(" addq %gs:{{.*}}, %r8")
__jited(" movabsq $0x{{.*}}, %rbx")
__jited(" addq %gs:{{.*}}, %rbx")
__jited(" movabsq $0x{{.*}}, %r13")
__jited(" addq %gs:{{.*}}, %r13")
__jited(" movabsq $0x{{.*}}, %r14")
__jited(" addq %gs:{{.*}}, %r14")
__jited(" movabsq $0x{{.*}}, %r15")
__jited(" addq %gs:{{.*}}, %r15")
__naked void percpu_addr(void)
{
asm volatile (" \
r0 = %[percpu_data] ll; \
r1 = %[percpu_data] ll; \
r2 = %[percpu_data] ll; \
r3 = %[percpu_data] ll; \
r4 = %[percpu_data] ll; \
r5 = %[percpu_data] ll; \
r6 = %[percpu_data] ll; \
r7 = %[percpu_data] ll; \
r8 = %[percpu_data] ll; \
r9 = %[percpu_data] ll; \
r0 = 0; \
exit; \
" :
: __imm_addr(percpu_data)
: __clobber_all);
}
#else
SEC("raw_tp")
__description("percpu addr dummy")
__success
int dummy_test(void)
{
return 0;
}
#endif
char _license[] SEC("license") = "GPL";
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