47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
/* $NetBSD: compat_sigaltstack.h,v 1.1 2007/06/03 14:59:46 dsl Exp $ */
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/* Wrapper for calling sigaltstack1() from compat (or other) code */
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/* Maybe these definitions could be global. */
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#ifdef SCARG_P32
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/* compat32 */
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#define SCARG_COMPAT_PTR(uap,p) SCARG_P32(uap, p)
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#define COMPAT_GET_PTR(p) NETBSD32PTR64(p)
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#define COMPAT_SET_PTR(p, v) NETBSD32PTR32(p, v)
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#else
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/* not a size change */
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#define SCARG_COMPAT_PTR(uap,p) SCARG(uap, p)
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#define COMPAT_GET_PTR(p) (p)
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#define COMPAT_SET_PTR(p, v) ((p) = (v))
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#endif
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#define compat_sigaltstack(uap, compat_ss) do { \
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struct compat_ss css; \
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struct sigaltstack nss, oss; \
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int error; \
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\
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if (SCARG_COMPAT_PTR(uap, nss)) { \
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error = copyin(SCARG_COMPAT_PTR(uap, nss), &css, sizeof css); \
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if (error) \
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return error; \
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nss.ss_sp = COMPAT_GET_PTR(css.ss_sp); \
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nss.ss_size = css.ss_size; \
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nss.ss_flags = css.ss_flags; \
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} \
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\
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error = sigaltstack1(l, SCARG_COMPAT_PTR(uap, nss) ? &nss : 0, \
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SCARG_COMPAT_PTR(uap, oss) ? &oss : 0); \
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if (error) \
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return (error); \
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\
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if (SCARG_COMPAT_PTR(uap, oss)) { \
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COMPAT_SET_PTR(css.ss_sp, oss.ss_sp); \
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css.ss_size = oss.ss_size; \
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css.ss_flags = oss.ss_flags; \
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error = copyout(&css, SCARG_COMPAT_PTR(uap, oss), sizeof(css)); \
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if (error) \
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return (error); \
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} \
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return (0); \
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} while (0)
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