kernel/bpf/core.c

62 #define AX	regs[BPF_REG_AX]
1302 	/* Constraints on AX register:
1304 	 * AX register is inaccessible from user space. It is mapped in
1312 	 * The interpreter uses AX in some occasions as a local temporary
1315 	 * In restricted circumstances, the verifier can also use the AX
1859 			div64_u64_rem(DST, SRC, &AX);
1860 			DST = AX;
1863 			AX = div64_s64(DST, SRC);
1864 			DST = DST - AX * SRC;
1871 			AX = (u32) DST;
1872 			DST = do_div(AX, (u32) SRC);
1875 			AX = abs((s32)DST);
1876 			AX = do_div(AX, abs((s32)SRC));
1878 				DST = (u32)-AX;
1880 				DST = (u32)AX;
1887 			div64_u64_rem(DST, IMM, &AX);
1888 			DST = AX;
1891 			AX = div64_s64(DST, IMM);
1892 			DST = DST - AX * IMM;
1899 			AX = (u32) DST;
1900 			DST = do_div(AX, (u32) IMM);
1903 			AX = abs((s32)DST);
1904 			AX = do_div(AX, abs((s32)IMM));
1906 				DST = (u32)-AX;
1908 				DST = (u32)AX;
1925 			AX = (u32) DST;
1926 			do_div(AX, (u32) SRC);
1927 			DST = (u32) AX;
1930 			AX = abs((s32)DST);
1931 			do_div(AX, abs((s32)SRC));
1933 				DST = (u32)AX;
1935 				DST = (u32)-AX;
1952 			AX = (u32) DST;
1953 			do_div(AX, (u32) IMM);
1954 			DST = (u32) AX;
1957 			AX = abs((s32)DST);
1958 			do_div(AX, abs((s32)IMM));
1960 				DST = (u32)AX;
1962 				DST = (u32)-AX;