From 80373c0b9a3685791afd6c210525e98fb5899ff7 Mon Sep 17 00:00:00 2001 From: yellows8 Date: Thu, 24 Dec 2015 15:58:28 -0500 Subject: [PATCH] Added proper documentation. Only set ropchainselect to -1 during init when ropchainselect wasn't set to anything previously. Load the codebin filepaths from a cfg file instead of hard-coding them. --- README.md | 60 +++++++++++++++++++++++++++++++++++++- wiiu_browserhax_common.php | 12 ++++++-- 2 files changed, 68 insertions(+), 4 deletions(-) diff --git a/README.md b/README.md index 61ef337..6827f98 100644 --- a/README.md +++ b/README.md @@ -1,6 +1,64 @@ -This is a common codebase for generating ROP-chains/etc for Wii U exploits. This uses addresses auto-located from coreinit. Currently only binary ROP-chains are supported. +This is a common codebase for generating ROP-chains/etc for *seperate* Wii U PowerPC-userland exploits. This repo is *not* intended for end-users. At the time of writing there is no public exploits using this codebase by the same author of this codebase, if/when this ever changes this text will likely be removed. This uses addresses auto-located from coreinit, with .php for each sysver that was pre-generated. This is basically a Wii U version of this: https://github.com/yellows8/3ds_browserhax_common + +Currently only binary ROP-chains are supported, hence no support for using this easily with WebKit exploits. The core1-switch ROP here doesn't work correctly currently, hence this codebase isn't usable as-is unless the current core is already core1(which isn't the case for WebKit exploits it seems). This codebase was originally designed for non-WebKit exploits. Hence the use of php, this is intended for running under browser-based titles, but could be used with others as well if the ROP-chain(s) are usable with them. You must specify the "sysver={val}" URL parameter for pages using this codebase, for selecting your Wii U system-version: * "532": 5.3.2 * "550": 5.5.0 +# Usage + +This codebase uses config/etc names from the 3ds repo mentioned above. + +If the exploit .php has to select a sysver without using the value selected with via the URL param, that could be done with the following for example(prior to using the require_once() for the common .php): "$sysver = 550;" DO NOT set $sysver to any data directly specified by the user. + +The $ropchainselect field determines which ROP-chain to use. Only one ROP-chain is implemented currently. When this param isn't specified, the codebase will select the default ROP-chain(val1). + +The default ROP-chain does the following(only usable with titles which have codegen access): +* 1) Runs the core1-switch ROP(see above). +* 2) Loads the codebin payload into the codegen/JIT area(with the required OSSwitchSecCodeGenMode() calls before/after), and does dcache/icache flushing/invalidation. +* 3) Pops addresses into registers which the codebin could then use, see source. +* 4) Jumps to the codebin payload. +* 5) See source. + +The memory address of the codebin payload is required, see below. If the payload isn't guaranteed to always be at the exact same address all the time, storing a PowerPC NOP-sled right before the payload in memory is highly recommended(big-endian word value 0x60000000). The output of wiiuhaxx_generatepayload() is: wiiuhaxx_loader followed by the actual payload, with 4-byte alignment for the total size(see below). + +Example that the exploit .php can use: + +``` +; +$ROPHEAP = ;//Such as the following: $payload_srcaddr-0x1000. +generate_ropchain(); + +... + +$payload = wiiuhaxx_generatepayload();//Binary codebin, include this in the output exploit so that it lands in memory usable by the ROP. + +... +?> +``` + +A config file located at "wiiuhaxx_common_cfg.php" is also required. +* $wiiuhaxxcfg_payloadfilepath is the filepath for the actual codebin payload to run, this will be loaded to codegen+0. +* $wiiuhaxxcfg_loaderfilepath is the filepath for wiiuhaxx_loader.bin. This loads the above payload, since due to the NOP-sled the initial code which runs(wiiuhaxx_loader) won't (always) land at codegen+0. This can be built by running the following: "make OUTPATH={filepath to copy the .bin to}". + +For example: + +``` +"; +$wiiuhaxxcfg_loaderfilepath = ""; + +?> +``` + diff --git a/wiiu_browserhax_common.php b/wiiu_browserhax_common.php index 5c237a6..7064348 100644 --- a/wiiu_browserhax_common.php +++ b/wiiu_browserhax_common.php @@ -1,5 +1,9 @@