samples: bpf: syscall_nrs: use mmap2 if defined
For arm32 xdp sockets mmap2 is preferred, so use it if it's defined. Declaration of __NR_mmap can be skipped and it breaks build. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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@ -9,5 +9,11 @@ void syscall_defines(void)
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COMMENT("Linux system call numbers.");
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SYSNR(__NR_write);
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SYSNR(__NR_read);
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#ifdef __NR_mmap2
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SYSNR(__NR_mmap2);
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#endif
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#ifdef __NR_mmap
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SYSNR(__NR_mmap);
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#endif
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}
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@ -68,12 +68,25 @@ PROG(SYS__NR_read)(struct pt_regs *ctx)
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return 0;
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}
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PROG(SYS__NR_mmap)(struct pt_regs *ctx)
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#ifdef __NR_mmap2
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PROG(SYS__NR_mmap2)(struct pt_regs *ctx)
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{
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char fmt[] = "mmap\n";
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char fmt[] = "mmap2\n";
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bpf_trace_printk(fmt, sizeof(fmt));
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return 0;
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}
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#endif
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#ifdef __NR_mmap
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PROG(SYS__NR_mmap)(struct pt_regs *ctx)
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{
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char fmt[] = "mmap\n";
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bpf_trace_printk(fmt, sizeof(fmt));
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return 0;
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}
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#endif
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char _license[] SEC("license") = "GPL";
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u32 _version SEC("version") = LINUX_VERSION_CODE;
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