mirror of
https://github.com/wiiu-env/homebrew_launcher.git
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a63171682d
- added error prints in progress window on failures NOTE: For this to work you will need to update the code550.bin (or the mp4 file). The old mp4 will still work but not be able to load RPX files, only ELFs.
70 lines
1.8 KiB
ArmAsm
70 lines
1.8 KiB
ArmAsm
# This stuff may need a change in different kernel versions
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# This is only needed when launched directly through browser and not SD card.
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.section ".kernel_code"
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.globl SaveAndResetDataBATs_And_SRs_hook
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SaveAndResetDataBATs_And_SRs_hook:
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# setup CTR to the position we need to return to
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mflr r5
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mtctr r5
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# set link register to its original value
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mtlr r7
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# setup us a nice DBAT for our code data with same region as our code
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mfspr r5, 560
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mtspr 570, r5
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mfspr r5, 561
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mtspr 571, r5
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# restore the original kernel instructions that we replaced
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lwz r5, 0x34(r3)
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lwz r6, 0x38(r3)
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lwz r7, 0x3C(r3)
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lwz r8, 0x40(r3)
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lwz r9, 0x44(r3)
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lwz r10, 0x48(r3)
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lwz r11, 0x4C(r3)
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lwz r3, 0x50(r3)
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isync
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mtsr 7, r5
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# jump back to the position in kernel after our patch (from LR)
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bctr
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.extern my_PrepareTitle
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.globl my_PrepareTitle_hook
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my_PrepareTitle_hook:
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# store all registers on stack to avoid issues with the call to C functions
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stwu r1, -0x90(r1)
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# registers for our own usage
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# just store everything
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stmw r3, 0x10(r1)
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# save the LR from where we came
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mflr r31
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# the cos.xml/app.xml structure is at the location 0x68 of r11
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# there are actually many places that can be hooked for it
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# e.g. 0xFFF16130 and r27 points to this structure
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addi r3, r11, 0x68
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bl my_PrepareTitle
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# setup LR to jump back to kernel code
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mtlr r31
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# restore all original values of registers from stack
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lmw r3, 0x10(r1)
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# restore the stack
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addi r1, r1, 0x90
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# restore original instruction that we replaced in the kernel
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clrlwi r7, r12, 0
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# jump back
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blr
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.globl SC0x25_KernelCopyData
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SC0x25_KernelCopyData:
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li r0, 0x2500
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sc
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blr
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