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%error, %warning out on the final pass, add %fatal

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Only process %error or %warning directives on the final pass.  Add a
new %fatal directive which terminates assembly immediately.
This commit is contained in:
H. Peter Anvin 2008-09-24 00:21:58 -07:00
parent 7f596e7aa8
commit 8e3f75ea6e
5 changed files with 165 additions and 8 deletions
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4
doc/changes.src
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@ -14,6 +14,10 @@ since 2007.
\b New \c{%warning} directive to issue user-controlled warnings.
\b \c{%error} directives are now deferred to the final assembly phase.
\b New \c{%fatal} directive to immediately terminate assembly.
\b \c{__utf16__} and \c{__utf32__} operators to generate UTF-16 and UTF-32
strings.

19
doc/nasmdoc.src
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@ -3389,7 +3389,7 @@ the construction of an appropriately sized ENTER instruction
as shown in the example.
\H{pperror} Reporting \i{User-Defined Errors}: \i\c{%error} and \i\c{%warning}
\H{pperror} Reporting \i{User-Defined Errors}: \i\c{%error}, \i\c{%warning}, \i\c{%fatal}
The preprocessor directive \c{%error} will cause NASM to report an
error if it occurs in assembled code. So if other users are going to
@ -3420,10 +3420,19 @@ Similarly, \c{%warning} issues a warning, but allows assembly to continue:
\c %define F1
\c %endif
It is optional for the message string after \c{%error} or \c{%warning}
to be quoted. If it is \e{not}, then single-line macros are expanded
in it, which can be used to display more information to the user. For
example:
\c{%error} and \c{%warning} are issued only on the final assembly
pass. This makes them safe to use in conjunction with tests that
depend on symbol values.
\c{%fatal} terminates assembly immediately, regardless of pass. This
is useful when there is no point in continuing the assembly further,
and doing so is likely just going to cause a spew of confusing error
messages.
It is optional for the message string after \c{%error}, \c{%warning}
or \c{%fatal} to be quoted. If it is \e{not}, then single-line macros
are expanded in it, which can be used to display more information to
the user. For example:
\c %if foo > 64
\c %assign foo_over foo-64

1
pptok.dat
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@ -27,6 +27,7 @@
%endrep
%error
%exitrep
%fatal
%iassign
%idefine
%idefstr

16
preproc.c
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@ -1938,6 +1938,7 @@ static int do_directive(Token * tline)
MMacro *tmp_defining; /* Used when manipulating rep_nest */
int64_t count;
size_t len;
int severity;
origline = tline;
@ -2363,12 +2364,21 @@ static int do_directive(Token * tline)
free_tlist(origline);
return DIRECTIVE_FOUND;
case PP_FATAL:
severity = ERR_FATAL|ERR_NO_SEVERITY;
goto issue_error;
case PP_ERROR:
severity = ERR_NONFATAL|ERR_NO_SEVERITY;
goto issue_error;
case PP_WARNING:
severity = ERR_WARNING|ERR_NO_SEVERITY;
goto issue_error;
issue_error:
{
int severity = (i == PP_ERROR)
? ERR_NONFATAL|ERR_NO_SEVERITY
: ERR_WARNING|ERR_NO_SEVERITY;
/* Only error out if this is the final pass */
if (pass != 2 && i != PP_FATAL)
return DIRECTIVE_FOUND;
tline->next = expand_smacro(tline->next);
tline = tline->next;

133
test/fwdoptpp.asm Normal file
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@ -0,0 +1,133 @@
;Testname=test; Arguments=-fbin -ofwdoptpp.bin; Files=.stdout .stderr fwdoptpp.bin
n0: jmp n1
n1: jmp n2
n2: jmp n3
n3: jmp n4
n4: jmp n5
n5: jmp n6
n6: jmp n7
n7: jmp n8
n8: jmp n9
n9: jmp n10
n10: jmp n11
n11: jmp n12
n12: jmp n13
n13: jmp n14
n14: jmp n15
n15: jmp n16
n16: jmp n17
n17: jmp n18
n18: jmp n19
n19: jmp n20
n20: jmp n21
n21: jmp n22
n22: jmp n23
n23: jmp n24
n24: jmp n25
n25: jmp n26
n26: jmp n27
n27: jmp n28
n28: jmp n29
n29: jmp n30
n30: jmp n31
n31: jmp n32
n32: jmp n33
n33: jmp n34
n34: jmp n35
n35: jmp n36
n36: jmp n37
n37: jmp n38
n38: jmp n39
n39: jmp n40
n40: jmp n41
n41: jmp n42
n42: jmp n43
n43: jmp n44
n44: jmp n45
n45: jmp n46
n46: jmp n47
n47: jmp n48
n48: jmp n49
n49: jmp n50
n50: jmp n51
n51: jmp n52
n52: jmp n53
n53: jmp n54
n54: jmp n55
n55: jmp n56
n56: jmp n57
n57: jmp n58
n58: jmp n59
n59: jmp n60
n60: jmp n61
n61: jmp n62
n62: jmp n63
n63: jmp n64
n64: jmp n65
n65: jmp n66
n66: jmp n67
n67: jmp n68
n68: jmp n69
n69: jmp n70
n70: jmp n71
n71: jmp n72
n72: jmp n73
n73: jmp n74
n74: jmp n75
n75: jmp n76
n76: jmp n77
n77: jmp n78
n78: jmp n79
n79: jmp n80
n80: jmp n81
n81: jmp n82
n82: jmp n83
n83: jmp n84
n84: jmp n85
n85: jmp n86
n86: jmp n87
n87: jmp n88
n88: jmp n89
n89: jmp n90
n90: jmp n91
n91: jmp n92
n92: jmp n93
n93: jmp n94
n94: jmp n95
n95: jmp n96
n96: jmp n97
n97: jmp n98
n98: jmp n99
n99: jmp n100
n100: jmp n101
n101: jmp n102
n102: jmp n103
n103: jmp n104
n104: jmp n105
n105: jmp n106
n106: jmp n107
n107: jmp n108
n108: jmp n109
n109: jmp n110
n110: jmp n111
n111: jmp n112
n112: jmp n113
n113: jmp n114
n114: jmp n115
n115: jmp n116
n116: jmp n117
n117: jmp n118
n118: jmp n119
n119: jmp n120
n120: jmp n121
n121: jmp n122
n122: jmp n123
n123: jmp n124
n124: jmp n125
n125: jmp n126
n126: jmp n127
n127: jmp n0
%if ($-$$) > 257
%fatal "Out of space!"
%endif