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Add basic stack unwinding functionality

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This commit is contained in:
Curle 2020-11-09 18:39:34 +00:00
parent 91063e12d2
commit 1cb5c671f7
Signed by: TheCurle
GPG Key ID: 5942F13718443F79
4 changed files with 47 additions and 1 deletions
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3
CMakeLists.txt
View File

@ -19,6 +19,7 @@ SET(src_files
${CMAKE_SOURCE_DIR}/chroma/system/rw.c
${CMAKE_SOURCE_DIR}/chroma/system/serial.c
${CMAKE_SOURCE_DIR}/chroma/system/pci.c
${CMAKE_SOURCE_DIR}/chroma/system/memory/stack.c
${CMAKE_SOURCE_DIR}/chroma/system/memory/paging.c
${CMAKE_SOURCE_DIR}/chroma/system/memory/abstract_allocator.c
${CMAKE_SOURCE_DIR}/chroma/system/memory/physmem.c
@ -53,5 +54,5 @@ set_property(SOURCE ${src_no_sse} PROPERTY COMPILE_FLAGS -mgeneral-regs-only)
add_executable(kernel)
target_sources(kernel PUBLIC ${src_preamble} PUBLIC ${src_files} PUBLIC ${src_no_sse} PUBLIC ${lib_files} PUBLIC ${CMAKE_SOURCE_DIR}/font.o PUBLIC ${src_epilogue})
target_compile_options(kernel PRIVATE -ffreestanding -O2 -Wall -Wextra -Wall -Werror -pedantic -fPIC -fno-exceptions )
target_compile_options(kernel PRIVATE -ffreestanding -O0 -Wall -Wextra -Wall -Werror -pedantic -fPIC -fno-exceptions -fno-omit-frame-pointer -mno-red-zone -fno-stack-protector )
target_link_options(kernel PRIVATE -T linker.ld -ffreestanding -O2 -nostdlib -nostartfiles -lgcc)

1
chroma/inc/kernel/chroma.h
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@ -18,6 +18,7 @@
#include <kernel/system/io.h>
#include <kernel/system/memory.h>
#include <kernel/system/pci.h>
#include <kernel/system/stack.h>
//Removed cause "wacky copyrighted stuff"
//#include <kernel/system/screen.h>

15
chroma/inc/kernel/system/stack.h Normal file
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@ -0,0 +1,15 @@
#pragma once
#include <stddef.h>
#include <stdint.h>
/************************
*** Team Kitty, 2020 ***
*** Chroma ***
***********************/
typedef struct stackframe {
struct stackframe* rbp;
size_t rip;
} stackframe_t;
void StackTrace(size_t cycles);

29
chroma/system/memory/stack.c Normal file
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@ -0,0 +1,29 @@
#include <kernel/chroma.h>
/************************
*** Team Kitty, 2020 ***
*** Chroma ***
***********************/
/*
* This file aims to implement stack unwinding
* to trace faulty functions.
*
* I was in the middle of debugging a jump to null
* when i started creating this, so there will be a
* lot of functionality here left over from that
* initial goal, probably...
*
* //TODO: Rework this to allow unwinding function parameters on call.
*/
void StackTrace(size_t cycles) {
struct stackframe* stack;
__asm__ __volatile__ ("mov %%rbp, %[dest]" : [dest] "=r" (stack) : :);
SerialPrintf("[Trace] Beginning stack trace. RBP is currently 0x%p\r\n", stack);
for(size_t frame = 0; stack != 0 && frame < cycles; ++frame) {
SerialPrintf("[Trace] 0x%p \r\n", stack->rip);
stack = stack->rbp;
}
SerialPrintf("[Trace] Stack trace over.\r\n");
}