Set __PASS__ to 3 for preprocess only

When running the preprocessor only, set __PASS__ to 3.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

3 files changed, 17 insertions, 9 deletions

diff --git a/doc/nasmdoc.src b/doc/nasmdoc.src
index 81062daf..5ccb7412 100644
--- a/doc/nasmdoc.src
+++ b/doc/nasmdoc.src
@@ -3674,9 +3674,8 @@ For example, if the \c{altreg} package is included (see
 
 The macro \c{__PASS__} is defined to be \c{1} on preparatory passes,
 and \c{2} on the final pass.  In preprocess-only mode, it is set to
-\c{2} (there being only the final pass); when running only to generate
-dependencies (due to the \c{-M} or \c{-MG} option, see \k{opt-M}) it
-is set to \c{0}.
+\c{3}, and when running only to generate dependencies (due to the
+\c{-M} or \c{-MG} option, see \k{opt-M}) it is set to \c{0}.
 
 \e{Avoid using this macro if at all possible.  It is tremendously easy
 to generate very strange errors by misusing it, and the semantics may
diff --git a/nasm.c b/nasm.c
index 4d4ab50b..a92db929 100644
--- a/nasm.c
+++ b/nasm.c
@@ -382,7 +382,7 @@ int main(int argc, char **argv)
             location.known = false;
 
 	    /* pass = 1; */
-            preproc->reset(inname, 2, report_error, evaluate, &nasmlist,
+            preproc->reset(inname, 3, report_error, evaluate, &nasmlist,
 			   depend_ptr);
 
             while ((line = preproc->getline())) {
diff --git a/preproc.c b/preproc.c
index ba895a55..7f1c44f0 100644
--- a/preproc.c
+++ b/preproc.c
@@ -4249,7 +4249,14 @@ pp_reset(char *file, int apass, efunc errfunc, evalfunc eval,
     do_predef = true;
     list = listgen;
     evaluate = eval;
-    pass = apass;
+
+    /*
+     * 0 for dependencies, 1 for preparatory passes, 2 for final pass.
+     * The caller, however, will also pass in 3 for preprocess-only so
+     * we can set __PASS__ accordingly.
+     */
+    pass = apass > 2 ? 2 : apass;
+
     dephead = deptail = deplist;
     if (deplist) {
 	StrList *sl = nasm_malloc(strlen(file)+1+sizeof sl->next);
@@ -4259,12 +4266,14 @@ pp_reset(char *file, int apass, efunc errfunc, evalfunc eval,
 	deptail = &sl->next;
     }
 
-    /* Define the __PASS__ macro.  This is defined here unlike
-       all the other builtins, because it is special -- it varies between
-       passes. */
+    /*
+     * Define the __PASS__ macro.  This is defined here unlike
+     * all the other builtins, because it is special -- it varies between
+     * passes.
+     */
     t = nasm_malloc(sizeof(*t));
     t->next = NULL;
-    make_tok_num(t, pass);
+    make_tok_num(t, apass);
     t->a.mac = NULL;
     define_smacro(NULL, "__PASS__", true, 0, t);
 }