1 # psi_add_redir(name, symbol)
2 # Add a function redirection to $PSI_REDIRS.
4 cat >>$PSI_REDIRS <<EOF
5 {"$1", (psi_func_ptr) $2},
9 # psi_add_decl(decl, options)
10 # Add a pre-defined decl to $PSI_VA_DECLS/$PSI_DECLS.
14 cat >>$PSI_VA_DECLS <<EOF
19 cat >>$PSI_DECLS <<EOF
26 dnl PSI_REDIR(name, custom symbol)
27 dnl Create a function redirection to an optional custom symbol.
29 psi_add_redir $1 ifelse([$2],[],[$1],[$2])
32 dnl PSI_FUNC_LIBC_MAIN()
33 dnl Check for the platforms default stub in executables.
34 AC_DEFUN(PSI_FUNC_LIBC_MAIN, [
35 AC_REQUIRE([AC_PROG_AWK])
36 AC_CACHE_CHECK(for libc start main symbol, psi_cv_libc_main, [
38 AC_TRY_LINK(PSI_INCLUDES, [(void)0;], [
39 psi_libc_main=`nm -g conftest$ac_exeext | $AWK -F ' *|@' '/^@<:@@<:@:space:@:>@@:>@+U / {print$[]3; exit}'`
41 psi_cv_libc_main=$psi_libc_main
45 dnl PSI_DECL_ARGS(decl args)
46 dnl INTERNAL: build psi_decl_args
47 AC_DEFUN(PSI_DECL_ARGS, [
53 [m4_map_args_sep([PSI_DECL_ARG(m4_normalize(], [))], [], m4_bregexp([$2], [(\(.*\))], [\1]))])
56 dnl PSI_DECL_ARG(decl arg)
57 dnl INTERNAL: build psi_decl_args
58 AC_DEFUN(PSI_DECL_ARG, [
59 m4_define([member_name], PSI_VAR_NAME($1))
60 m4_define([member_type], PSI_VAR_TYPE($1))
62 PSI_TYPE_INDIRECTION([$1],, pl, as)
63 if test -n "$psi_decl_args"; then
64 psi_decl_args="$psi_decl_args, "
66 psi_decl_args="[$psi_decl_args{]PSI_TYPE_PAIR(member_type)[, \"]member_name[\",] $pl, $as[}]"
69 dnl PSI_DECL(type func, args, flags)
70 dnl Check for a function or macro declaration and a possible asm redirection.
71 dnl Adds a pre-defined (vararg) decl to $PSI_VA_DECLS/$PSI_DECLS.
72 dnl Calls PSI_MACRO if PSI_FUNC fails.
74 AC_REQUIRE([PSI_FUNC_LIBC_MAIN])
77 psi_symbol="PSI_VAR_NAME($1)"
78 AC_CACHE_CHECK(for PSI_VAR_NAME($1), [psi_cv_fn_]PSI_VAR_NAME($1), [
80 AC_TRY_LINK(PSI_INCLUDES, [
81 void (*fn)(void) = (void (*)(void)) $psi_symbol; (*fn)()
83 psi_symbol_redirect=`nm -g conftest$ac_exeext | $AWK -F ' *|@' '/^@<:@@<:@:space:@:>@@:>@+U '$psi_cv_libc_main'/ {next} /^@<:@@<:@:space:@:>@@:>@+U / {print$[]3; exit}'`
85 [psi_cv_fn_]PSI_VAR_NAME($1)=$psi_symbol_redirect
87 case "$[psi_cv_fn_]PSI_VAR_NAME($1)" in
88 "$psi_symbol"|"_$psi_symbol")
89 psi_add_decl "$psi_decl_args" $3
92 ifelse([$3], vararg, [
93 AC_MSG_ERROR(varargs macro support is not implemented)
96 psi_add_decl "$psi_decl_args"
101 PSI_REDIR($psi_symbol, $psi_symbol_redirect)