mirror of
https://github.com/Fennix-Project/Kernel.git
synced 2025-05-28 15:34:33 +00:00
75 lines
1.8 KiB
C++
75 lines
1.8 KiB
C++
#include <types.h>
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#include <debug.h>
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#include <rand.hpp>
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#include "../kernel.h"
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/* EXTERNC */ __attribute__((weak)) uintptr_t __stack_chk_guard = 0;
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EXTERNC __attribute__((weak, no_stack_protector)) uintptr_t __stack_chk_guard_init(void)
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{
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int MaxRetries = 0;
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#if UINTPTR_MAX == UINT32_MAX
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uint32_t num;
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Retry:
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num = Random::rand32();
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if (num < 0x1000 && MaxRetries++ < 10)
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goto Retry;
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return num;
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#else
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uint64_t num;
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Retry:
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num = Random::rand64();
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if (num < 0x100000 && MaxRetries++ < 10)
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goto Retry;
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return num;
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#endif
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}
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EXTERNC __attribute__((constructor, no_stack_protector)) void __guard_setup(void)
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{
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debug("StackGuard: __guard_setup");
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if (__stack_chk_guard == 0)
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__stack_chk_guard = __stack_chk_guard_init();
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debug("Stack guard value: %ld", __stack_chk_guard);
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}
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EXTERNC __attribute__((weak, noreturn, no_stack_protector)) void __stack_chk_fail(void)
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{
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TaskingPanic();
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for (short i = 0; i < 10; i++)
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error("Stack smashing detected!");
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debug("Current stack check guard value: %#lx", __stack_chk_guard);
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KPrint("\eFF0000Stack smashing detected!");
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#if defined(__amd64__) || defined(__i386__)
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void *Stack = nullptr;
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asmv("movq %%rsp, %0"
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: "=r"(Stack));
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error("Stack address: %#lx", Stack);
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while (1)
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asmv("cli; hlt");
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#elif defined(__aarch64__)
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asmv("wfe");
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#endif
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CPU::Stop();
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}
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// https://github.com/gcc-mirror/gcc/blob/master/libssp/ssp.c
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EXTERNC __attribute__((weak, noreturn, no_stack_protector)) void __chk_fail(void)
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{
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TaskingPanic();
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for (short i = 0; i < 10; i++)
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error("Buffer overflow detected!");
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KPrint("\eFF0000Buffer overflow detected!");
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#if defined(__amd64__) || defined(__i386__)
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while (1)
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asmv("cli; hlt");
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#elif defined(__aarch64__)
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asmv("wfe");
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#endif
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}
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