1 files changed, 0 insertions, 135 deletions
diff --git a/externals/libadrenotools/src/bcenabler.cpp b/externals/libadrenotools/src/bcenabler.cpp
deleted file mode 100644
index 1deb41df40..0000000000
--- a/externals/libadrenotools/src/bcenabler.cpp
+++ /dev/null
@@ -1,135 +0,0 @@
-// SPDX-License-Identifier: BSD-2-Clause
-// Copyright © 2021 Billy Laws
-
-#include <fstream>
-#include <string>
-#include <cstring>
-#include <sys/mman.h>
-#include <unistd.h>
-#include <adrenotools/bcenabler.h>
-#include "gen/bcenabler_patch.h"
-
-enum adrenotools_bcn_type adrenotools_get_bcn_type(uint32_t major, uint32_t minor, uint32_t vendorId) {
-    if (vendorId != 0x5143 || major != 512)
-        return ADRENOTOOLS_BCN_INCOMPATIBLE;
-
-    if (minor >= 514)
-        return ADRENOTOOLS_BCN_BLOB;
-
-    return ADRENOTOOLS_BCN_PATCH;
-}
-
-// Searches /proc/self/maps for the first free page after the given address
-static void *find_free_page(uintptr_t address) {
-    std::ifstream procMaps("/proc/self/maps");
-
-    uintptr_t end{};
-
-    for (std::string line; std::getline(procMaps, line); ) {
-        std::size_t addressSeparator{line.find('-')};
-        uintptr_t start{std::strtoull(line.substr(0, addressSeparator).c_str(), nullptr, 16)};
-
-        if (end > address && start != end)
-            return reinterpret_cast<void *>(end);
-
-        end = std::strtoull(line.substr(addressSeparator + 1, line.find( ' ')).c_str(), nullptr, 16);
-    }
-
-    return nullptr;
-}
-
-static void *align_ptr(void *ptr) {
-    return reinterpret_cast<void *>(reinterpret_cast<uintptr_t>(ptr) & ~(getpagesize() - 1));
-}
-
-bool adrenotools_patch_bcn(void *vkGetPhysicalDeviceFormatPropertiesFn) {
-    union Branch {
-        struct {
-            int32_t offset : 26; //!< 26-bit branch offset
-            uint8_t sig : 6;  //!< 6-bit signature (0x25 for linked, 0x5 for jump)
-        };
-
-        uint32_t raw{};
-    };
-    static_assert(sizeof(Branch) == 4, "Branch size is invalid");
-
-    // Find the nearest unmapped page where we can place patch code
-    void *patchPage{find_free_page(reinterpret_cast<uintptr_t>(vkGetPhysicalDeviceFormatPropertiesFn))};
-    if (!patchPage)
-        return false;
-
-    // Map patch region
-    void *ptr{mmap(patchPage, getpagesize(),  PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, 0, 0)};
-    if (ptr != patchPage)
-        return false;
-
-    // Allow reading from the blob's .text section since some devices enable ---X
-    // Protect two pages just in case we happen to land on a page boundary
-    if (mprotect(align_ptr(vkGetPhysicalDeviceFormatPropertiesFn), getpagesize() * 2, PROT_WRITE | PROT_READ | PROT_EXEC))
-        return false;
-
-    // First branch in this function is targeted at the function we want to patch
-    Branch *blInst{reinterpret_cast<Branch *>(vkGetPhysicalDeviceFormatPropertiesFn)};
-
-    constexpr uint8_t BranchLinkSignature{0x25};
-
-    // Search for first instruction with the BL signature
-    while (blInst->sig != BranchLinkSignature)
-        blInst++;
-
-    // Internal QGL format conversion function that we need to patch
-    uint32_t *convFormatFn{reinterpret_cast<uint32_t *>(blInst) + blInst->offset};
-
-    // See mprotect call above
-    // This time we also set PROT_WRITE so we can write our patch to the page
-    if (mprotect(align_ptr(convFormatFn), getpagesize() * 2, PROT_WRITE | PROT_READ | PROT_EXEC))
-        return false;
-
-    // This would normally set the default result to 0 (error) in the format not found case
-    constexpr uint32_t ClearResultSignature{0x2a1f03e0};
-
-    // We replace it with a branch to our own extended if statement which adds in the extra things for BCn
-    uint32_t *clearResultPtr{convFormatFn};
-    while (*clearResultPtr != ClearResultSignature)
-        clearResultPtr++;
-
-    // Ensure we don't write out of bounds
-    if (PatchRawData_size > getpagesize())
-        return false;
-
-    // Copy the patch function to our mapped page
-    memcpy(patchPage, PatchRawData, PatchRawData_size);
-
-    // Fixup the patch code so it correctly returns back to the driver after running
-    constexpr uint32_t PatchReturnFixupMagic{0xffffffff};
-    constexpr uint8_t BranchSignature{0x5};
-
-    uint32_t *fixupTargetPtr{clearResultPtr + 1};
-    auto *fixupPtr{reinterpret_cast<uint32_t *>(patchPage)};
-    for (long unsigned int i{}; i < (PatchRawData_size / sizeof(uint32_t)); i++, fixupPtr++) {
-        if (*fixupPtr == PatchReturnFixupMagic) {
-            Branch branchToDriver{
-                {
-                    .offset = static_cast<int32_t>((reinterpret_cast<intptr_t>(fixupTargetPtr) - reinterpret_cast<intptr_t>(fixupPtr)) / sizeof(int32_t)),
-                    .sig = BranchSignature,
-                }
-            };
-
-            *fixupPtr = branchToDriver.raw;
-        }
-    }
-
-    Branch branchToPatch{
-        {
-            .offset = static_cast<int32_t>((reinterpret_cast<intptr_t>(patchPage) - reinterpret_cast<intptr_t>(clearResultPtr)) / sizeof(int32_t)),
-            .sig = BranchSignature,
-        }
-    };
-
-    *clearResultPtr = branchToPatch.raw;
-
-    asm volatile("ISB");
-
-    // Done!
-    return true;
-}