SIGHAX HYPE! Tried getting interrupts working

buildtools/mkfirm.py

@@ -1,9 +1,9 @@
 #!/usr/bin/env python3
 import sys
+import base64
 if len(sys.argv) < 4:
     print("USAGE: mkfirm.py <kernel9.elf> <kernel11.elf> <output.firm>")
-print("WARNING: Currently you cannot install this FIRM, because YOU'LL BRICK YOUR 3DS!")
+sighax_sig=base64.a85decode(b'DZ:iLO%T*f"sal5!m5:QU$Gmm[dg)m,&2*<U<LK%FP[g"\'Kc#M==?kH6r/uA>-HJLBEU+9e;EeCligEb]Qpn^2!Gp5_g%-,]IDC-MMahK=@9T\\,0,4&6MDgNaP\'t06CY.qpSb;KMn)+PR1>e0IbaRdgDC5J-m3DLB2d$%DNZn-W7=ADNLl+s&Z2gs%A?=ZJ:91F?66n9DXZ.-lL+5$#ebaKH5IB)Y&DTGd%!,O4me2`$F["\\.$Tr)%\\,h,n.Q]LTQGQRH:#a?1l(T-i_m7b\\7Mg5Ga7LDUacTc`!af0V`"\'-*]I]3%SL)@)ll701ok)i')
-sighax_sig = b'\x00'*256 #TODO insert sighax signature here.
 import struct
 import hashlib
 def get_elf_seg(f): #Return entry,section_beg,section_size,section
@@ -49,6 +49,18 @@ f2 = open(sys.argv[2],"rb")
 f = open(sys.argv[3],"wb")
 arm9_entry,arm9_section_beg,arm9_section_size,arm9_section = get_elf_seg(f1)
 arm11_entry,arm11_section_beg,arm11_section_size,arm11_section = get_elf_seg(f2)
+def align(a,b):
+    if a % b:
+        return a + b - (a%b)
+    return a
+def align2(a,b):
+    if len(a) % b:
+        return a + bytes(512-(len(a)%b))
+    return a
+arm9_section_size=align(arm9_section_size,512)
+arm11_section_size=align(arm11_section_size,512)
+arm9_section=align2(arm9_section,512)
+arm11_section=align2(arm11_section,512)
 arm9_hash=hashlib.sha256(arm9_section).digest()
 arm11_hash=hashlib.sha256(arm11_section).digest()
 arm9_off = 0x200

do_all.sh

@@ -1,5 +1,5 @@
 builddir() {
-    rm -rvvf build/ &&
+    rm -rf build/ &&
     mkdir -pv build/
 }
 rm -rvvf out/
@@ -59,4 +59,15 @@ mv kernel9 build/kernel &&
 buildtools/sighax-firm.sh &&
 mv sighax.firm out/ &&
 cp -v build/kernel/kernel out/arm11loaderhax.elf
-rm -rvvf build/
+rm -rf build/
+
+#firmloader
+pushd boot/3ds &&
+builddir &&
+pushd build &&
+cmake -DCMAKE_TOOLCHAIN_FILE=../../../toolchains/arm-none-eabi.cmake ..  &&
+make -j$(nproc) &&
+popd &&
+mv build/arm9loaderhax.bin ../../out &&
+rm -rf build/ &&
+popd

kernel/arch/arm/3ds11/start.cpp

@@ -1,4 +1,5 @@
 #include "../../../hw/3ds11/picafb/picafb.hpp"
+#include "../../../hw/3ds11/vectorinit/vectorinit.hpp"
 #include <base.hpp>
 #include <config.h>
 
@@ -8,4 +9,6 @@ extern "C" void start() { main(); }
 void drivers_init() {
     setMainTTY(&term);
     --term;
+    initVectors();
+    asm volatile("svc #0");
 }

kernel/arch/arm/3ds11/start.s

@@ -8,6 +8,28 @@
 _start:
     CPSID aif //Disable interrupts
     ldr sp,  =kernel_stack
+    //set other stacks
+    mrs r0, cpsr
+    bic r2, r0, #0x1F
+    mov r1, r2
+    orr r1, #0b10001 //FIQ
+    msr cpsr, r1
+    ldr sp, =interrupt_stack
+    mov r1, r2
+    orr r1, #0b10010 //IRQ
+    msr cpsr, r1
+    ldr sp, =interrupt_stack
+    mov r1, r2
+    orr r1, #0b10111 //Abort
+    msr cpsr, r1
+    ldr sp, =exception_stack
+    mov r1, r2
+    orr r1, #0b11011 //Undefined
+    msr cpsr, r1
+    ldr sp, =exception_stack
+    orr r1, #0b11111 //SYS
+    msr cpsr, r1
+    ldr sp, =kernel_stack
     //Enable FPU
     mov r0, #0
     mov r1, #0xF00000
@@ -17,9 +39,14 @@ _start:
     mov r2, #0x3C00000
     fmxr fpexc, r1
     fmxr fpscr, r2
+
     //Start MTGos
     blx start
 
 .section .bss
+.space 4096
+interrupt_stack:
+.space 4096
+exception_stack:
 .space 16384
 kernel_stack:

kernel/arch/arm/3ds9/flags.cmake

@@ -1,3 +1,3 @@
-SET(PLATFORM_C_FLAGS "-I../../kernel/arch/arm/3ds9/include -mcpu=arm946e-s -march=armv5te -mthumb-interwork -mthumb -Os")
+SET(PLATFORM_C_FLAGS "-I../../kernel/arch/arm/3ds9/include -mcpu=arm946e-s -march=armv5te -mthumb-interwork -marm -O9")
 SET(PLATFORM_CXX_FLAGS "${PLATFORM_C_FLAGS}")
 SET(PLATFORM_ASM_FLAGS "${PLATFORM_C_FLAGS}")

kernel/arch/arm/3ds9/start.s

@@ -28,6 +28,32 @@ _start:
     blx r0
 */
     ldr sp, =kernel_stack //set stack
+    //Set other stacks
+    mrs r0, cpsr
+    bic r2, r0, #0x1F
+    mov r1, r2
+    orr r1, #0b10001 //FIQ
+    msr cpsr, r1
+    ldr sp, =interrupt_stack
+    mov r1, r2
+    orr r1, #0b10010 //IRQ
+    msr cpsr, r1
+    ldr sp, =interrupt_stack
+    mov r1, r2
+    orr r1, #0b10111 //Abort
+    msr cpsr, r1
+    ldr sp, =exception_stack
+    mov r1, r2
+    orr r1, #0b11011 //Undefined
+    msr cpsr, r1
+    ldr sp, =exception_stack
+    mov r1, r2
+    orr r1, #0b10011 //SVC
+    msr cpsr, r1
+    ldr sp, =kernel_stack
+    orr r1, #0b11111 //SYS
+    msr cpsr, r1
+    ldr sp, =kernel_stack
 /*
     //Configure ITCM to…something
     mrc p15, 0, r0, c9, c1, 1
@@ -95,5 +121,9 @@ _start:
     blx start
 
 .section .bss
+.space 4096
+interrupt_stack:
+.space 4096
+exception_stack:
 .space 16384
 kernel_stack:

kernel/arch/arm/cache.s

@@ -0,0 +1,24 @@
+.arm
+.global drainWriteBuffer
+drainWriteBuffer:
+    mov r0, #0
+    mcr p15, 0, r0, c7, c10, 4
+    bx lr
+
+.global flushAll
+flushAll:
+    mov r1, #0 //Segment
+1:
+        mov r0, #0 //Line
+2:
+            orr r2, r1, r0
+            mcr p15, 0, r2, c7, c14, 2 //Flush current line
+            add r0, #0x20 //Next line
+            cmp r0, #0x400
+            bne 2b
+        add r1, #0x40000000
+        cmp r1, #0x0
+        bne 1b
+    mov r0, #0
+    mcr p15, 0, r0, c7, c5, 0 //flush instruction cache
+    b drainWriteBuffer

kernel/arch/arm/include/cache.h

@@ -0,0 +1,4 @@
+extern "C" {
+    void flushAll();
+    void drainWriteBuffer();
+}

kernel/arch/arm/interrupt.cpp

@@ -15,6 +15,10 @@ void print_regdump(cpu_state *state) {
     (*out << " r11: ").puti(state->r11);
     (*out << " r12: ").puti(state->r12);
     (*out << " pc: ").puti(state->pc);
+    (*out << " cpsr: ").puti(state->cpsr);
+    (*out << " sp: ").puti(state->sp);
+    (*out << " lr: ").puti(state->lr);
+    (*out << " returnAddr: ").puti(state->returnAddr);
     *out << "\n";
 }
 extern "C" cpu_state *handleINT(int number, cpu_state *state) {
@@ -25,7 +29,8 @@ extern "C" cpu_state *handleINT(int number, cpu_state *state) {
         out->setColor(Color::RED);
         print_regdump(state);
         *out << "KERNEL PANIC: Unhandled CPU exception\n";
-        //        for(;;);
+        for (;;);
+    } else {
     }
     switch (number) {
     case 0:

kernel/arch/arm/sourcegen.py

@@ -5,13 +5,14 @@ int_handler.write(
 .section .bss
 .space 4096
 exception_stack:
+.section .data
+.space 4
+oldsp:
 .section .text
 .global branch_macro
 branch_macro:
     ldr pc, [pc, #-4] //Load the next word into PC
 .macro interrupt_handler intid
-    //Set to the correct stack
-    ldr sp, =exception_stack
     push {r0-r12,lr} //Push registers
 
     //Get previous sp and lr
@@ -41,7 +42,8 @@ branch_macro:
     ldr r0, =\intid
 
     //Jump to generic handler
-    blx intr_common_handler
+
+    bl intr_common_handler
 
     //pop the special registers
     pop {r0, r3, r4, lr}
@@ -50,6 +52,7 @@ branch_macro:
     orr lr, lr, #1 //Enable thumb mode on return#
 2:
     str lr, [sp, #0x34] //Set correct lr
+
     ldmfd sp!, {r0-r12, pc}^ //Return back to original mode
 .endm
 .global data_abort
@@ -81,8 +84,8 @@ if ("ENABLE_HARD" in config) and config["ENABLE_HARD"]:
     for i,j in enumerate(["fpsid","fpscr","fpexc"]):
         push_regs.append("fmrx r"+str(i+1)+", "+j)
         pop_regs.append("fmxr "+j+", r"+str(i+1))
-    push_regs.append("push {r1,r2,r3,r4,r5}")
+    push_regs.append("push {r1,r2,r3}")
-    pop_regs.append("pop {r1,r2,r3,r4,r5}")
+    pop_regs.append("pop {r1,r2,r3}")
     push_regs.append("vpush {d0-d15}")
     pop_regs.append("vpop {d0-d15}")
 push_regs.append("mov r1, sp")
@@ -102,10 +105,10 @@ int_handler.write("    b panic\n")
 
 reg_struct.write("#include <stdint.h>\nstruct cpu_state {\n")
 if ("ENABLE_HARD" in config) and config["ENABLE_HARD"]:
-    for reg in ["fpsid","fpscr","fpexc"]:
-        reg_struct.write("    uint32_t "+reg+";\n")
     for reg in ("d"+str(i) for i in range(16)):
         reg_struct.write("    double "+reg+";\n")
+    for reg in ["fpsid","fpscr","fpexc"]:
+        reg_struct.write("    uint32_t "+reg+";\n")
 for reg in ["cpsr","sp","lr","returnAddr"]:
     reg_struct.write("    uint32_t "+reg+";\n")
 for i in range(13):

kernel/hw/3ds11/picafb/picafb.cpp

@@ -8,7 +8,7 @@
 #define GL_RGB565_OES 2
 #define GL_RGB5_A1_OES 3
 #define GL_RGBA4_OES 4
-PICAfb::PICAfb() : Framebuffer(25, 30) {
+PICAfb::PICAfb() : Framebuffer(50, 15) {
 #ifdef ENABLE_SCREENINIT
     MCU::enableTopLCD();
     MCU::enableBottomLCD();
@@ -93,8 +93,8 @@ PICAfb::PICAfb() : Framebuffer(25, 30) {
 PICAfb::~PICAfb() {}
 auto PICAfb::plotPixel(int x, int y, int col) -> void {
     unsigned char *lfb = (unsigned char *)0x18300000;
-    // XXX I know it's rotated. But I need more vertical space than horizonal space.
+    y=240-y-1;
-    int off = (y * 240 + x) * 3;
+    int off = (x * 240 + y) * 3;
     for (int i = 0; i < 3; i++) {
         lfb[off++] = col;
         col >>= 8;

kernel/hw/3ds9/picafb/picafb.cpp

@@ -1,11 +1,11 @@
 #include "picafb.hpp"
 #include <config.h>
-PICAfb::PICAfb() : Framebuffer(25, 20) {}
+PICAfb::PICAfb() : Framebuffer(40, 15) {}
 PICAfb::~PICAfb() {}
 auto PICAfb::plotPixel(int x, int y, int col) -> void {
     unsigned char *lfb = (unsigned char *)0x18300000 + 0x46500;
-    // XXX I know it's rotated. But I need more vertical space than horizonal space.
+    y=240-y-1;
-    int off = (y * 240 + x) * 3;
+    int off = (x * 240 + y) * 3;
     for (int i = 0; i < 3; i++) {
         lfb[off++] = col;
         col >>= 8;

kernel/hw/3ds9/vectorinit/vectorinit.cpp

@@ -7,9 +7,12 @@ void normal_irq();
 void prefetch_abort();
 void svc_call();
 void undefined_op();
+void flushAll();
 }
+#pragma GCC push_options
+#pragma GCC optimize("O0")
 void initVectors() {
-    uintptr_t *vectors = (uintptr_t *)0x0800000;
+    uintptr_t *vectors = (uintptr_t *)0x08000000;
     // branch_macro is a ldr pc, [pc,#-4], meaning it reads the following word as PC
     vectors[0] = branch_macro;
     vectors[1] = (uintptr_t)&normal_irq;
@@ -23,4 +26,6 @@ void initVectors() {
     vectors[9] = (uintptr_t)&prefetch_abort;
     vectors[10] = branch_macro;
     vectors[11] = (uintptr_t)&data_abort;
+    flushAll();
 }
+#pragma GCC pop_options

kernel/src/tty.cpp

@@ -16,7 +16,7 @@ auto TTY::setColor(unsigned int c) -> void {
 auto TTY::putChar(int c) -> void {
     auto scroll = [this]() -> void {
         for (int x = 0; x < this->width; x++)
-            for (int y = 0; y < this->height; y++) this->plotChar(x, y, 0);
+            for (int y = 0; y < this->height; y++) this->plotChar(x, y, 0x20);
         this->x = this->y = 0;
     };
     switch (c) {
@@ -28,7 +28,7 @@ auto TTY::putChar(int c) -> void {
     default:
         plotChar(x, y, c);
         x++;
-        if (x > width) {
+        if (x >= width) {
             y++;
             x = 0;
         }