samples: bpf: syscall_nrs: use mmap2 if defined (bb4b5c08) · Commits · 戴 / test

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:

samples/bpf/syscall_nrs.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -9,5 +9,11 @@ void syscall_defines(void)
		COMMENT("Linux system call numbers.");
		SYSNR(__NR_write);
		SYSNR(__NR_read);
		#ifdef __NR_mmap2
		SYSNR(__NR_mmap2);
		#endif
		#ifdef __NR_mmap
		SYSNR(__NR_mmap);
		#endif

		}

+13 −0

Original line number	Diff line number	Diff line
		@@ -68,12 +68,25 @@ PROG(SYS__NR_read)(struct pt_regs *ctx)
		return 0;
		}

		#ifdef __NR_mmap2
		PROG(SYS__NR_mmap2)(struct pt_regs *ctx)
		{
		char fmt[] = "mmap2\n";

		bpf_trace_printk(fmt, sizeof(fmt));
		return 0;
		}
		#endif

		#ifdef __NR_mmap
		PROG(SYS__NR_mmap)(struct pt_regs *ctx)
		{
		char fmt[] = "mmap\n";

		bpf_trace_printk(fmt, sizeof(fmt));
		return 0;
		}
		#endif

		char _license[] SEC("license") = "GPL";
		u32 _version SEC("version") = LINUX_VERSION_CODE;