/* $NetBSD: compat_sigaltstack.h,v 1.3 2011/06/05 09:37:10 dsl Exp $ */ /* Wrapper for calling sigaltstack1() from compat (or other) code */ /* Maybe these definitions could be global. */ #ifdef SCARG_P32 /* compat32 */ #define SCARG_COMPAT_PTR(uap,p) SCARG_P32(uap, p) #define COMPAT_GET_PTR(p) NETBSD32PTR64(p) #define COMPAT_SET_PTR(p, v) NETBSD32PTR32(p, v) #else /* not a size change */ #define SCARG_COMPAT_PTR(uap,p) SCARG(uap, p) #define COMPAT_GET_PTR(p) (p) #define COMPAT_SET_PTR(p, v) ((p) = (v)) #endif #define compat_sigaltstack(uap, compat_ss, ss_onstack, ss_disable) do { \ struct compat_ss css; \ struct sigaltstack nss, oss; \ int error; \ \ if (SCARG_COMPAT_PTR(uap, nss)) { \ error = copyin(SCARG_COMPAT_PTR(uap, nss), &css, sizeof css); \ if (error) \ return error; \ nss.ss_sp = COMPAT_GET_PTR(css.ss_sp); \ nss.ss_size = css.ss_size; \ if (ss_onstack == SS_ONSTACK && ss_disable == SS_DISABLE) \ nss.ss_flags = css.ss_flags; \ else \ nss.ss_flags = \ (css.ss_flags & ss_onstack ? SS_ONSTACK : 0) \ | (css.ss_flags & ss_disable ? SS_DISABLE : 0); \ } \ \ error = sigaltstack1(curlwp, SCARG_COMPAT_PTR(uap, nss) ? &nss : 0, \ SCARG_COMPAT_PTR(uap, oss) ? &oss : 0); \ if (error) \ return (error); \ \ if (SCARG_COMPAT_PTR(uap, oss)) { \ COMPAT_SET_PTR(css.ss_sp, oss.ss_sp); \ css.ss_size = oss.ss_size; \ if (ss_onstack == SS_ONSTACK && ss_disable == SS_DISABLE) \ css.ss_flags = oss.ss_flags; \ else \ css.ss_flags = \ (oss.ss_flags & SS_ONSTACK ? ss_onstack : 0) \ | (oss.ss_flags & SS_DISABLE ? ss_disable : 0); \ error = copyout(&css, SCARG_COMPAT_PTR(uap, oss), sizeof(css));\ if (error) \ return (error); \ } \ return (0); \ } while (0) |