Fix critical ldscript bug and CI, add BIOS setjmp

6 files changed, 82 insertions, 39 deletions

diff --git a/libpsn00b/include/psxapi.h b/libpsn00b/include/psxapi.h
index e7c2e1e..1298d29 100644
--- a/libpsn00b/include/psxapi.h
+++ b/libpsn00b/include/psxapi.h
@@ -121,6 +121,12 @@ struct EXEC {
 	unsigned int sp,fp,rp,ret,base;
 };
 
+struct JMP_BUF {
+	unsigned int	ra, sp, fp;
+	unsigned int	s0, s1, s2, s3, s4, s5, s6, s7;
+	unsigned int	gp;
+};
+
 // Not recommended to use these functions to install IRQ handlers
 
 typedef struct {
@@ -211,6 +217,12 @@ void ChangeClearRCnt(int t, int m);
 int Exec(struct EXEC *exec, int argc, char **argv);
 void FlushCache(void);
 
+// BIOS setjmp functions
+void b_setjmp(struct JMP_BUF *buf);
+void b_longjmp(struct JMP_BUF *buf, int param);
+void SetDefaultExitFromException(void);
+void SetCustomExitFromException(struct JMP_BUF *buf);
+
 // Misc functions
 int GetSystemInfo(int index);
 void *GetB0Table(void);
diff --git a/libpsn00b/ldscripts/dll.ld b/libpsn00b/ldscripts/dll.ld
index a03a504..15158e4 100644
--- a/libpsn00b/ldscripts/dll.ld
+++ b/libpsn00b/ldscripts/dll.ld
@@ -86,6 +86,7 @@ SECTIONS {
 		 * as we don't have to worry about managing .bss separately from the
 		 * main DLL blob.
 		 */
+		. = ALIGN((. != 0) ? 4 : 1);
 		__bss_start = .;
 
 		*(.bss .bss.* .gnu.linkonce.b.*)
diff --git a/libpsn00b/ldscripts/exe.ld b/libpsn00b/ldscripts/exe.ld
index c6b9f29..583d76a 100644
--- a/libpsn00b/ldscripts/exe.ld
+++ b/libpsn00b/ldscripts/exe.ld
@@ -82,6 +82,11 @@ SECTIONS {
 
 	/* BSS sections, i.e. uninitialized variables */
 
+	/*
+	 * Align all BSS sections to 4 bytes to ensure _start() doesn't perform
+	 * unaligned memory accesses when clearing them.
+	 */
+	. = ALIGN((. != 0) ? 4 : 1);
 	__bss_start = .;
 
 	.sbss (NOLOAD) : {
@@ -91,13 +96,9 @@ SECTIONS {
 	.bss (NOLOAD) : {
 		*(.bss .bss.* .gnu.linkonce.b.*)
 		*(COMMON)
-
-		/*
-		 * This crap was in the stock GCC linker script.
-		 */
-		. = ALIGN((. != 0) ? 4 : 1);
 	} > APP_RAM
 
+	. = ALIGN((. != 0) ? 4 : 1);
 	_end = .;
 
 	/* Dummy section */
diff --git a/libpsn00b/psxapi/stubs.json b/libpsn00b/psxapi/stubs.json
index 14ef935..9198b06 100644
--- a/libpsn00b/psxapi/stubs.json
+++ b/libpsn00b/psxapi/stubs.json
@@ -49,6 +49,18 @@
 	},
 	{
 		"type": "a",
+		"id":   19,
+		"name": "b_setjmp",
+		"file": "sys.s"
+	},
+	{
+		"type": "a",
+		"id":   20,
+		"name": "b_longjmp",
+		"file": "sys.s"
+	},
+	{
+		"type": "a",
 		"id":   57,
 		"name": "b_InitHeap",
 		"file": "sys.s"
diff --git a/libpsn00b/psxapi/sys.s b/libpsn00b/psxapi/sys.s
index ef57124..e54bd98 100644
--- a/libpsn00b/psxapi/sys.s
+++ b/libpsn00b/psxapi/sys.s
@@ -6,7 +6,23 @@
 
 .set noreorder
 
-## A0 table functions (5)
+## A0 table functions (7)
+
+.section .text.b_setjmp
+.global b_setjmp
+.type b_setjmp, @function
+b_setjmp:
+	li $t2, 0xa0
+	jr $t2
+	li $t1, 0x13
+
+.section .text.b_longjmp
+.global b_longjmp
+.type b_longjmp, @function
+b_longjmp:
+	li $t2, 0xa0
+	jr $t2
+	li $t1, 0x14
 
 .section .text.b_InitHeap
 .global b_InitHeap
diff --git a/libpsn00b/readme.txt b/libpsn00b/readme.txt
index cfff733..6a6be5a 100644
--- a/libpsn00b/readme.txt
+++ b/libpsn00b/readme.txt
@@ -18,33 +18,39 @@ recommended version as that is what LibPSn00b is most tested most on.
 
 Brief summary of libraries:
 
-	libc	- Standard C library. Covers only a small subset of the full
-			  standard C library such as basic string and memory manipulation
-			  functions. Should include libgcc to avoid libc/libgcc linker
-			  hell (endless cross referencing).
-			  
-	psxgpu	- GPU library for video, graphics control, and interrupt service
-			  subsystem that other libraries that uses interrupts depend on.
-	
-	psxgte	- GTE library for hardware accelerated vector transformations
-			  that are integral for high performance 3D graphics on the PS1
-			  (it is a Geometry Transformation Engine, NOT Transfer Engine).
-			  
-	psxapi	- Provides function calls for using functions provided by the PS1
-			  BIOS.
-			  
-	psxetc	- Provides some miscellaneous features used by the other libraries
-			  as well as a dynamic linker for loading DLLs at runtime.
-
-	psxspu	- SPU library (work in progress). Currently supports hardware
-			  init, sample data upload via DMA and playing sound samples.
-			  Lacks support for reverb and a sequenced music subsystem.
-			  
-	psxcd	- CD-ROM library for loading files, parsing directories
-			  (PSn00bSDK addition), CD Audio/XA playback with provisions for
-			  data streaming. Also supports multi-session discs (must be
-			  selected manually).
-			   
+	libc	 - Standard C library. Covers only a small subset of the full
+			   standard C library such as basic string and memory manipulation
+			   functions. Should include libgcc to avoid libc/libgcc linker
+			   hell (endless cross referencing).
+
+	psxgpu	 - GPU library for video, graphics control, and interrupt service
+			   subsystem that other libraries that uses interrupts depend on.
+
+	psxgte	 - GTE library for hardware accelerated vector transformations
+			   that are integral for high performance 3D graphics on the PS1
+			   (it is a Geometry Transformation Engine, NOT Transfer Engine).
+
+	psxapi	 - Provides function calls for using functions provided by the PS1
+			   BIOS.
+
+	psxetc	 - Provides some miscellaneous features used by the other libraries
+			   as well as a dynamic linker for loading DLLs at runtime.
+
+	psxspu	 - SPU library (work in progress). Currently supports hardware
+			   init, sample data upload via DMA and playing sound samples.
+			   Lacks support for reverb and a sequenced music subsystem.
+
+	psxcd	 - CD-ROM library for loading files, parsing directories
+			   (PSn00bSDK addition), CD Audio/XA playback with provisions for
+			   data streaming. Also supports multi-session discs (must be
+			   selected manually).
+
+	psxpress - Experimental MDEC library. Currently provides APIs to feed data
+			   to the MDEC and retrieve decoded images, as well as a
+			   decompressor for the Huffman encoding used in FMVs encoded using
+			   Sony tools. A custom decompressor based on arithmetic coding
+			   might be implemented in the future.
+
 	Each library has its own readme file that contains a todo list, credits
 	and some additional details of the library. Changes of all the libraries
 	must be covered in the changelog.txt file.
@@ -52,7 +58,7 @@ Brief summary of libraries:
 
 Compiling:
 
-	Refer to INSTALL.md in the parent directory for up-to-date installation
+	Refer to installation.md in the doc directory for up-to-date installation
 	instructions.
 
 	--- THE SECTION BELOW IS OUTDATED AND ONLY KEPT FOR REFERENCE ---
@@ -144,11 +150,6 @@ LibPSn00b Library to-do list:
 	psxmcrd  - Better and faster memory card library with provisions for
 			   low-level card access. The psxpad library would provide
 			   communication routines for the card library.
-			   
-	psxpress - MDEC and data decompression library. May use DEFLATE or LZ77
-			   for compressing MDEC data instead of Huffman as used in the
-			   official libraries. It may yield better compression which may
-			   potentially result in higher quality FMVs.
 
 	psxexp   - Support library for various devices connected to the serial or
 			   expansion port, including both official ones (e.g. PCMCIA cards