samples/bpf/syscall_nrs.c

#include <uapi/linux/unistd.h>
#include <linux/kbuild.h>

#define SYSNR(_NR) DEFINE(SYS ## _NR, _NR)

void syscall_defines(void)
{
	COMMENT("Linux system call numbers.");
	SYSNR(__NR_write);
	SYSNR(__NR_read);
	SYSNR(__NR_mmap);
}
samples/bpf: Fix tracex5 to work with MIPS syscalls. There are two problems: 1) In MIPS the __NR_* macros expand to an expression, this causes the sections of the object file to be named like: . . . [ 5] kprobe/(5000 + 1) PROGBITS 0000000000000000 000160 ... [ 6] kprobe/(5000 + 0) PROGBITS 0000000000000000 000258 ... [ 7] kprobe/(5000 + 9) PROGBITS 0000000000000000 000348 ... . . . The fix here is to use the "asm_offsets" trick to evaluate the macros in the C compiler and generate a header file with a usable form of the macros. 2) MIPS syscall numbers start at 5000, so we need a bigger map to hold the sub-programs. Signed-off-by: David Daney <david.daney@cavium.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net> 2017-06-13 16:49:38 -07:00			`#include <uapi/linux/unistd.h>`
			`#include <linux/kbuild.h>`

			`#define SYSNR(_NR) DEFINE(SYS ## _NR, _NR)`

			`void syscall_defines(void)`
			`{`
			`COMMENT("Linux system call numbers.");`
			`SYSNR(__NR_write);`
			`SYSNR(__NR_read);`
			`SYSNR(__NR_mmap);`
			`}`