diff --git a/Data/Sys/codehandler.bin b/Data/Sys/codehandler.bin index aaa2e39acd..41adf8a7b2 100644 Binary files a/Data/Sys/codehandler.bin and b/Data/Sys/codehandler.bin differ diff --git a/docs/codehandler.ld b/docs/codehandler.ld new file mode 100644 index 0000000000..535a9e3d99 --- /dev/null +++ b/docs/codehandler.ld @@ -0,0 +1,7 @@ +OUTPUT_FORMAT(binary) +OUTPUT(codehandler.bin) +SECTIONS +{ + . = 0x80001800; + .text : { *(.text) } +} diff --git a/docs/codehandler.s b/docs/codehandler.s index 0385c7605a..f80f22729c 100644 --- a/docs/codehandler.s +++ b/docs/codehandler.s @@ -21,6 +21,8 @@ #SOFTWARE. #Based off of codehandleronly.s from Gecko OS source code. +# Example command to build: +# powerpc-elf-gcc -mpowerpc -mpaired -mbig codehandler.s -nostartfiles -nodefaultlibs -nostdlib -T codehandler.ld -o codehandler.bin .text #Register Defines @@ -42,11 +44,11 @@ cheatdata: .space 39*4 _start: - stwu r1,-168(r1) # stores sp + stwu r1,-172(r1) # stores sp stw r0,8(r1) # stores r0 mflr r0 - stw r0,172(r1) # stores lr + stw r0,176(r1) # stores lr mfcr r0 stw r0,12(r1) # stores cr @@ -60,6 +62,8 @@ _start: stmw r3,24(r1) # saves r3-r31 mfmsr r25 + stw r25,168(r1) # save msr + ori r26,r25,0x2000 #enable floating point ? andi. r26,r26,0xF9FF mtmsr r26 @@ -70,18 +74,17 @@ _start: - lis r31,_start@h #0x8000 + lis r31,cheatdata@h #0x8000 lis r20, 0xCC00 lhz r28, 0x4010(r20) ori r21, r28, 0xFF sth r21, 0x4010(r20) # disable MP3 memory protection - mflr r29 lis r15, codelist@h ori r15, r15, codelist@l - ori r7, 31, cheatdata@l # set pointer for storing data (before the codelist) + ori r7, r31, cheatdata@l # set pointer for storing data (before the codelist) lis r6,0x8000 # default base address = 0x80000000 (code handler) @@ -101,17 +104,16 @@ _start: addi r15,r15,8 b _readcodes _exitcodehandler: - mtlr r29 -resumegame: sth r28,0x4010(r20) # restore memory protection value lfd f2,152(r1) # loads f2 lfd f3,160(r1) # loads f3 + lwz r25,168(r1) mtmsr r25 - lwz r0,172(r1) + lwz r0,176(r1) mtlr r0 # restores lr lwz r0,12(r1) @@ -127,7 +129,7 @@ resumegame: lwz r0,8(r1) # loads r0 - addi r1,r1,168 + addi r1,r1,172 isync