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Correct bug in the object file output code leading to stack corruption It turns out leaving a pointer to a stack allocated temporary in a persistent data structure is not conducive to correct program operation. Undo the export check setup in the object file output sequence so a pointer to stack allocated memory is not left hanging when the function returns. This seems to correct at least one mysterious crash bug, and possibly others. Thanks to Boisy Pitre for reporting the crash bug that led to this discovery, as well as a previous crash bug that likely has the same root cause. Additional thanks to Ciaran Anscomb whose debugger wielding wizardry revealed the exact location of this particular bit of unbrilliance.
author William Astle <lost@l-w.ca>
date Sat, 03 Aug 2024 14:30:06 -0600
parents fc072f6cde09
children
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<HTML
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><TITLE
>LW Tool Chain</TITLE
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><DIV
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><H1
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><A
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>LW Tool Chain</A
></H1
><H3
CLASS="AUTHOR"
><A
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></A
>William Astle</H3
><H3
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><A
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>LWTools Contributors </H3
><P
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>Copyright &copy; 2009-2021 William Astle and LWTools contributors</P
><HR></DIV
><DIV
CLASS="TOC"
><DL
><DT
><B
>Table of Contents</B
></DT
><DT
>1. <A
HREF="c13.html"
>Introduction</A
></DT
><DD
><DL
><DT
>1.1. <A
HREF="c13.html#AEN16"
>History</A
></DT
></DL
></DD
><DT
>2. <A
HREF="c21.html"
>Output Formats</A
></DT
><DD
><DL
><DT
>2.1. <A
HREF="c21.html#AEN24"
>Raw Binaries</A
></DT
><DT
>2.2. <A
HREF="x27.html"
>DECB Binaries</A
></DT
><DT
>2.3. <A
HREF="x32.html"
>ASCII Hexadecimal</A
></DT
><DT
>2.4. <A
HREF="x36.html"
>Motorola S-Record</A
></DT
><DT
>2.5. <A
HREF="x41.html"
>Intel Hex</A
></DT
><DT
>2.6. <A
HREF="x46.html"
>OS9 Modules</A
></DT
><DT
>2.7. <A
HREF="x54.html"
>Object Files</A
></DT
></DL
></DD
><DT
>3. <A
HREF="c62.html"
>LWASM</A
></DT
><DD
><DL
><DT
>3.1. <A
HREF="c62.html#AEN65"
>Command Line Options</A
></DT
><DT
>3.2. <A
HREF="x229.html"
>Dialects</A
></DT
><DT
>3.3. <A
HREF="x238.html"
>Source Format</A
></DT
><DT
>3.4. <A
HREF="x248.html"
>Symbols</A
></DT
><DT
>3.5. <A
HREF="x253.html"
>Numbers and Expressions</A
></DT
><DT
>3.6. <A
HREF="x261.html"
>Assembler Directives</A
></DT
><DD
><DL
><DT
>3.6.1. <A
HREF="x261.html#AEN264"
>Data Directives</A
></DT
><DT
>3.6.2. <A
HREF="x261.html#AEN381"
>Address Definition</A
></DT
><DT
>3.6.3. <A
HREF="x261.html#AEN432"
>Conditional Assembly</A
></DT
><DT
>3.6.4. <A
HREF="x261.html#AEN503"
>OS9 Target Directives</A
></DT
><DT
>3.6.5. <A
HREF="x261.html#AEN528"
>Miscelaneous Directives</A
></DT
></DL
></DD
><DT
>3.7. <A
HREF="x568.html"
>Macros</A
></DT
><DT
>3.8. <A
HREF="x591.html"
>Structures</A
></DT
><DT
>3.9. <A
HREF="x612.html"
>Object Files and Sections</A
></DT
><DT
>3.10. <A
HREF="x676.html"
>Assembler Modes and Pragmas</A
></DT
><DT
>3.11. <A
HREF="x827.html"
>Convenience Instructions</A
></DT
><DT
>3.12. <A
HREF="x832.html"
>Cycle Counts</A
></DT
></DL
></DD
><DT
>4. <A
HREF="c838.html"
>LWLINK</A
></DT
><DD
><DL
><DT
>4.1. <A
HREF="c838.html#AEN841"
>Command Line Options</A
></DT
><DT
>4.2. <A
HREF="x938.html"
>Linker Operation</A
></DT
><DT
>4.3. <A
HREF="x952.html"
>Linking Scripts</A
></DT
><DT
>4.4. <A
HREF="x1019.html"
>Format Specific Linking Notes</A
></DT
><DD
><DL
><DT
>4.4.1. <A
HREF="x1019.html#AEN1022"
>OS9 Modules</A
></DT
></DL
></DD
></DL
></DD
><DT
>5. <A
HREF="c1034.html"
>Libraries and LWAR</A
></DT
><DD
><DL
><DT
>5.1. <A
HREF="c1034.html#AEN1038"
>Command Line Options</A
></DT
></DL
></DD
><DT
>6. <A
HREF="c1096.html"
>Object Files</A
></DT
></DL
></DIV
><DIV
CLASS="LOT"
><DL
CLASS="LOT"
><DT
><B
>List of Tables</B
></DT
><DT
>6-1. <A
HREF="c1096.html#AEN1121"
>Object File Term Types</A
></DT
><DT
>6-2. <A
HREF="c1096.html#AEN1151"
>Object File Operator Numbers</A
></DT
></DL
></DIV
></DIV
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>Introduction</TD
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