40 lines
1.2 KiB
C++
40 lines
1.2 KiB
C++
#include <stdint.h>
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#include "kernel.h"
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/* assembly functions */
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extern "C" void Syscall_0x36(void);
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extern "C" void KernelPatches(void);
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void __attribute__ ((noinline)) kern_write(void *addr, uint32_t value);
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void doKernelSetup(){
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kern_write((void*)(KERN_SYSCALL_TBL_1 + (0x36 * 4)), (unsigned int)KernelPatches);
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kern_write((void*)(KERN_SYSCALL_TBL_2 + (0x36 * 4)), (unsigned int)KernelPatches);
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kern_write((void*)(KERN_SYSCALL_TBL_3 + (0x36 * 4)), (unsigned int)KernelPatches);
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kern_write((void*)(KERN_SYSCALL_TBL_4 + (0x36 * 4)), (unsigned int)KernelPatches);
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kern_write((void*)(KERN_SYSCALL_TBL_5 + (0x36 * 4)), (unsigned int)KernelPatches);
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Syscall_0x36();
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}
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/* Write a 32-bit word with kernel permissions */
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void __attribute__ ((noinline)) kern_write(void *addr, uint32_t value) {
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asm volatile (
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"li 3,1\n"
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"li 4,0\n"
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"mr 5,%1\n"
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"li 6,0\n"
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"li 7,0\n"
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"lis 8,1\n"
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"mr 9,%0\n"
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"mr %1,1\n"
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"li 0,0x3500\n"
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"sc\n"
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"nop\n"
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"mr 1,%1\n"
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:
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: "r"(addr), "r"(value)
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: "memory", "ctr", "lr", "0", "3", "4", "5", "6", "7", "8", "9", "10",
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"11", "12"
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);
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} |