1*2f2c0062Sguenther /* $OpenBSD: DEFS.h,v 1.1 2016/09/12 19:47:02 guenther Exp $ */ 2*2f2c0062Sguenther 3*2f2c0062Sguenther /* 4*2f2c0062Sguenther * Written by Philip Guenther <guenther@openbsd.org> 5*2f2c0062Sguenther */ 6*2f2c0062Sguenther 7*2f2c0062Sguenther #include <machine/asm.h> 8*2f2c0062Sguenther 9*2f2c0062Sguenther /* 10*2f2c0062Sguenther * We define a hidden alias with the prefix "_libm_" for each global symbol 11*2f2c0062Sguenther * that may be used internally. By referencing _libm_x instead of x, other 12*2f2c0062Sguenther * parts of libm prevent overriding by the application and avoid unnecessary 13*2f2c0062Sguenther * relocations. 14*2f2c0062Sguenther */ 15*2f2c0062Sguenther #define _HIDDEN(x) _libm_##x 16*2f2c0062Sguenther #define _HIDDEN_ALIAS(x,y) \ 17*2f2c0062Sguenther STRONG_ALIAS(_HIDDEN(x),y); \ 18*2f2c0062Sguenther .hidden _HIDDEN(x) 19*2f2c0062Sguenther #define _HIDDEN_FALIAS(x,y) \ 20*2f2c0062Sguenther _HIDDEN_ALIAS(x,y); \ 21*2f2c0062Sguenther .type _HIDDEN(x),@function 22*2f2c0062Sguenther 23*2f2c0062Sguenther /* 24*2f2c0062Sguenther * For functions implemented in ASM that are used internally 25*2f2c0062Sguenther * END_STD(x) Like DEF_STD() in C; for standard/reserved C names 26*2f2c0062Sguenther * END_NONSTD(x) Like DEF_NONSTD() in C; for non-ISO C names 27*2f2c0062Sguenther */ 28*2f2c0062Sguenther #define END_STD(x) END(x); _HIDDEN_FALIAS(x,x); END(_HIDDEN(x)) 29*2f2c0062Sguenther #define END_NONSTD(x) END_STD(x); .weak x 30