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Ilia Sharin 2026-04-26 14:46:18 -04:00
parent 5fac29ccd5
commit 8133b3a6cb
90 changed files with 7794 additions and 705 deletions
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2
04_linking_and_libraries/compiler_stubs.md
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@ -55,7 +55,7 @@ extern struct DosLibrary *DOSBase;
extern struct ExecBase *SysBase;
```
These are initialised in `c.o` (the startup stub):
These are initialized in `c.o` (the startup stub):
```asm
_c_start:
MOVE.L 4.W, A6 ; SysBase from exception vector

6
04_linking_and_libraries/library_structure.md
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@ -141,7 +141,7 @@ The double-jump (JSR→JMP→function→RTS) costs approximately 12 extra cycles
```c
struct Library *MakeLibrary(
APTR funcArray, /* A0: function pointer array */
APTR structInit, /* A1: struct initialiser table (or NULL) */
APTR structInit, /* A1: struct initializer table (or NULL) */
APTR initFunc, /* A2: init function (or NULL) */
ULONG dataSize, /* D0: sizeof(MyLibBase) */
BPTR segList /* D1: segment list (for UnLoadSeg on expunge) */
@ -409,8 +409,8 @@ void SumLibrary(struct Library *lib)
stateDiagram-v2
[*] --> OnDisk : LIBS:my.library file
OnDisk --> Loading : OpenLibrary("my.library", 1)
Loading --> Initialised : LoadSeg + MakeLibrary + LibInit
Initialised --> Added : AddLibrary → SysBase→LibList
Loading --> Initialized : LoadSeg + MakeLibrary + LibInit
Initialized --> Added : AddLibrary → SysBase→LibList
Added --> Open : OpenLibrary → Open() LVO → lib_OpenCnt++
Open --> Open : More OpenLibrary calls
Open --> Closing : CloseLibrary → Close() LVO → lib_OpenCnt--

2
04_linking_and_libraries/setfunction.md
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@ -73,7 +73,7 @@ void install_patch(void)
## Calling the Original (Chaining)
The replacement function **must** call the original to maintain correct library behaviour. The old function address returned by `SetFunction` is a raw pointer to the original function body (not the JMP slot):
The replacement function **must** call the original to maintain correct library behavior. The old function address returned by `SetFunction` is a raw pointer to the original function body (not the JMP slot):
```c
/* Jump to original using register convention */

4
04_linking_and_libraries/shared_libraries_runtime.md
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@ -393,8 +393,8 @@ void TryFreeMemory(void)
stateDiagram-v2
[*] --> Unloaded : File on disk
Unloaded --> Loading : OpenLibrary → ramlib
Loading --> Initialised : LoadSeg + InitResident
Initialised --> InLibList : AddLibrary → SysBase→LibList
Loading --> Initialized : LoadSeg + InitResident
Initialized --> InLibList : AddLibrary → SysBase→LibList
InLibList --> Open : Open() LVO, lib_OpenCnt=1
Open --> Open : OpenLibrary (lib_OpenCnt++)
Open --> Closing : CloseLibrary (lib_OpenCnt--)

2
04_linking_and_libraries/startup_code.md
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@ -4,7 +4,7 @@
## Overview
The AmigaOS **startup code** is the first code that runs when an executable is launched. It bridges the OS loader (which jumps to hunk 0 offset 0) and the C `main()` function. Understanding it is critical for reverse engineering — it reveals the initialisation sequence, library opens, argument parsing, and the Workbench vs CLI detection path.
The AmigaOS **startup code** is the first code that runs when an executable is launched. It bridges the OS loader (which jumps to hunk 0 offset 0) and the C `main()` function. Understanding it is critical for reverse engineering — it reveals the initialization sequence, library opens, argument parsing, and the Workbench vs CLI detection path.
---