mirror of
https://github.com/Fennix-Project/Kernel.git
synced 2025-05-25 22:14:37 +00:00
107 lines
2.4 KiB
C++
107 lines
2.4 KiB
C++
/*
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This file is part of Fennix Kernel.
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Fennix Kernel is free software: you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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Fennix Kernel is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
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*/
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#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 */ __weak uintptr_t __stack_chk_guard = 0;
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EXTERNC __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 __constructor __no_stack_protector void __guard_setup(void)
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{
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debug("__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 __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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void *Stack = nullptr;
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#if defined(a86)
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#if defined(a64)
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asmv("movq %%rsp, %0"
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: "=r"(Stack));
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#elif defined(a32)
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asmv("movl %%esp, %0"
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: "=r"(Stack));
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#endif
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#elif defined(aa64)
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asmv("mov %%sp, %0"
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: "=r"(Stack));
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#endif
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error("Stack address: %#lx", Stack);
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if (DebuggerIsAttached)
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#ifdef a86
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asmv("int $0x3");
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#elif defined(aa64)
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asmv("brk #0");
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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 __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(a86)
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while (1)
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asmv("cli; hlt");
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#elif defined(aa64)
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asmv("wfe");
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#endif
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}
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