ARM Compiler toolchain v4.1 for ÂµVision Using the Compiler

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Compiler Coding Practices 5.55 Examining parameters when integer division-by-zero errors occur in C code If you want to examine parameters and save them for postmortem debugging, you can trap __aeabi_idiv0. You can intervene in all calls to __aeabi_idiv0 by using the $Super$$ and $Sub$$ mechanism. To examine parameters when integer division-by-zero occurs: 1. Prefix __aeabi_idiv0() with $Super$$ to identify the original unpatched function __aeabi_idiv0(). 2. Use __aeabi_idiv0() prefixed with $Super$$ to call the original function directly. 3. Prefix __aeabi_idiv0() with $Sub$$ to identify the new function to be called in place of the original version of __aeabi_idiv0(). 4. Use __aeabi_idiv0() prefixed with $Sub$$ to add processing before or after the original function __aeabi_idiv0(). 5.55.1 Example Example 5-5 illustrates the use of the $Super$$ and $Sub$$ mechanism to intercept __aeabi_div0. Example 5-5 Intercepting __aeabi_div0 using $Super$$ and $Sub$$ extern void $Super$$__aeabi_idiv0(void); /* this function is called instead of the original __aeabi_idiv0() */ void $Sub$$__aeabi_idiv0() { // insert code to process a divide by zero ... // call the original __aeabi_idiv0 function $Super$$__aeabi_idiv0(); } 5.55.2 See also Concepts • Integer division-by-zero errors in C code on page 5-67. Using the Linker: • Using $Super$$ and $Sub$$ to patch symbol definitions on page 7-28. Other information • Run-time ABI for the ARM Architecture, http://infocenter.arm.com/help/topic/com.arm.doc.ihi0043-/index.html. ARM DUI 0375C Copyright © 2007-2008, 2011 ARM. All rights reserved. 5-71 ID061811 Non-Confidential
Compiler Coding Practices 5.56 Software floating-point division-by-zero errors in C code Floating-point division-by-zero errors in software can be trapped and identified using a combination of intrinsics and C library helper functions. See the following topics: • About trapping software floating-point division-by-zero errors on page 5-73 • Identification of software floating-point division-by-zero errors on page 5-74 • Software floating-point division-by-zero debugging on page 5-76. ARM DUI 0375C Copyright © 2007-2008, 2011 ARM. All rights reserved. 5-72 ID061811 Non-Confidential
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® ARM Compiler toolchain v4.1 for
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Contents ARM Compiler toolchain v4.
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Contents 5.19 Inline functions ....
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Contents 7.41 __mcall_is_virtual(D,
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Conventions and Feedback • the se
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Overview of the compiler 2.1 The co
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Overview of the compiler 2.3 The C
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Getting started with the Compiler
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Getting started with the Compiler 3
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Getting started with the Compiler
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Getting started with the Compiler R
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Chapter 4 Compiler Features The fol
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Compiler Features 4.1 Compiler intr
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Compiler Features 4.2 Performance b
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Compiler Features 4.4 Generic intri
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Compiler Features 4.10 Compiler sup
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Compiler Features 4.12 Texas Instru
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Compiler Features /* Declare PSR as
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Compiler Features 4.13.1 See also R
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Compiler Features 4.15 Compiler and
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Compiler Features Using the Linker:
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Compiler Features Reference Compile
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Compiler Features 4.19 Compiler sup
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Compiler Features 4.21 PreCompiled
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Compiler Features 4.23 PreCompiled
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Compiler Features Reference Compile
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Compiler Features 4.26 Obsolete Pre
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Compiler Features 4.28 Selectively
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Compiler Features 4.32 Default comp
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Compiler Coding Practices • Guard
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Compiler Coding Practices • Exten
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Compiler Coding Practices 5.2 Compi
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Compiler Coding Practices 5.4 Selec
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Compiler Coding Practices In additi
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Compiler Coding Practices Table 5-4
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Compiler Coding Practices Table 5-6
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Compiler Coding Practices 5.9 Code
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Compiler Coding Practices 4. After
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ARM Compiler toolchain v4.1 for ÂµVision Using the Compiler

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