mirror of
https://github.com/wiiu-env/ROBChain.git
synced 2024-11-16 15:59:14 +01:00
103 lines
3.1 KiB
Plaintext
103 lines
3.1 KiB
Plaintext
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____________
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| Stack |
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| ******* |
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|------------| <---Top
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| whatever |
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| (0x574) |
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|------------|
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| 0xC006FA0 |
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|------------|
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| 0x8 bytes |
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|------------|
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| to be | This is going to point to lastReturn minus 0x37E4
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| determined | startPos + 0x28 - 0x37E4
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|------------|
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| 0x10 bytes |
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|------------|
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|stack pivot | Location of stack pivot (should be handled by MSC?)
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| position |
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|------------|
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| 0xC2EAB14 |
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|------------|
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| lastReturn | Location to jump to before stack pivot takes effect
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------------
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Calculating stack pivot position:
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------------------
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* Overflow stack
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* Write 0x92 as index
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* Store that in globalVarX
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* Pop till back in stack
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* globalVarX += 0x240
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* Overflow stack
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* Write -0x8B (FFFFFF75) as index
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* Store in globalVarY
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* Push globalVarY
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* Push all other globalVars in order (to not overwrite the ones we need for later!)
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* Push 0s till we get back to the stack
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* stack pivot position = globalVarY + 0x30 + script_X (where script_X is the rest of the ROP chain)
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stack+0x574 = first return address for the ROP chain
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loc 2006FA0 = loading something into r12
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will get stack+0x24 as return address
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r12 = r1 + 0xC
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stackPos += 0x20
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.text:02006FA0 lwz r12, 0xC(r1)
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.text:02006FA4 addi r3, r1, 8
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.text:02006FA8 stw r11, 4(r31)
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.text:02006FAC li r4, 2
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.text:02006FB0 stw r12, 8(r31)
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.text:02006FB4 bl sub_32FF61C
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.text:02006FB8 lwz r0, 0x20+arg_4(r1)
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.text:02006FBC mtlr r0
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.text:02006FC0 lwz r31, 0x1C(r1)
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.text:02006FC4 addi r1, r1, 0x20
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.text:02006FC8 blr
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loc 22EAB24 = stack pivot gadget (or 22EAB1C to get r0 -> mtlr)
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37E4 + r12 = returnPosition (aim this at the stack and fire at will)
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.text:022EAB14 lwz r0, 0x37E4(r12)
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.text:022EAB18 lwz r31, 0x37DC(r12)
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.text:022EAB1C mtlr r0
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.text:022EAB20 lwz r30, 0x37D8(r12)
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.text:022EAB24 lwz r1, 0(r1)
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.text:022EAB28 blr
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loc 0x200C650 q = load value from stack into r3
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r3 = stack+0x8
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return address = stack+0x74
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.text:0200C650 lwz r3, 0x70+var_68(r1)
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.text:0200C654 lmw r27, 0x70+var_14(r1)
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.text:0200C658 lwz r0, 0x70+arg_4(r1)
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.text:0200C65C mtlr r0
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.text:0200C660 addi r1, r1, 0x70
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.text:0200C664 blr
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r1 = 1124D3D0 at start
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with diibugger
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---------------
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writePos = 0x1124D3D0 + 0x570 + 0x2C = 0x1124D96C
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lastPos = writePos + 0x30 - 0x37E4 = 0x1124A1B8
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without diibugger
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-----------------
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writePos = 0x11258208 + 0x570 + 0x2C = 0x113587A4
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lastPos = writePos + 0x30 - 0x37E4 =
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