crash_screen.c File Reference

Go to the source code of this file.

Data Structures
struct	CrashScreen

Macros
#define	GLYPH(x, y)   (x + (y * 5))

Functions
	INCLUDE_IMG ("crash_screen/font.png", gCrashScreenFont)
void	crash_screen_set_assert_info (const char *message)
void	crash_screen_sleep (s32 ms)
void	crash_screen_draw_rect (s32 x, s32 y, s32 width, s32 height)
s32	crash_screen_draw_glyph (s32 x, s32 y, s32 glyph)
char *	crash_screen_copy_to_buf (char *dest, const char *src, size_t size)
s32	crash_screen_printf (s32 x, s32 y, const char *fmt,...)
s32	crash_screen_printf_proportional (s32 x, s32 y, const char *fmt,...)
void	crash_screen_print_fpr (s32 x, s32 y, s32 regNum, void *addr)
void	crash_screen_print_fpcsr (u32 value)
void	crash_screen_draw (OSThread *faultedThread)
OSThread *	crash_screen_get_faulted_thread (void)
void	crash_screen_thread_entry (void *unused)
void	crash_screen_set_draw_info (u16 *frameBufPtr, s16 width, s16 height)
void	crash_screen_init (void)
void	crash_screen_printf_with_bg (s16 x, s16 y, const char *fmt,...)

Variables
BSS CrashScreen	gCrashScreen
u8	gCrashScreencharToGlyph [128]
const char *	gFaultCauses [18]
const char *	gFPCSRFaultCauses [6]
char	crashScreenAssertMessage [0x100] = {0}

---

Data Structure Documentation

CrashScreen

struct CrashScreen

Data Fields
OSThread	thread
char	stack[0x800]
OSMesgQueue	queue
OSMesg	mesg
u16 *	frameBuf
u16	width
u16	height

Macro Definition Documentation

GLYPH

#define GLYPH	(		x,
			y )   (x + (y * 5))

Definition at line 33 of file crash_screen.c.

Referenced by crash_screen_draw_glyph(), and crash_screen_init().

Function Documentation

INCLUDE_IMG()

INCLUDE_IMG	(	"crash_screen/font.png"	,
		gCrashScreenFont	)

crash_screen_set_assert_info()

void crash_screen_set_assert_info

(

const char *

message

)

Definition at line 67 of file crash_screen.c.

                                                       {
    strncpy(crashScreenAssertMessage, message, sizeof(crashScreenAssertMessage));
    crashScreenAssertMessage[sizeof(crashScreenAssertMessage) - 1] = '\0';
}

Referenced by is_debug_panic().

crash_screen_sleep()

void crash_screen_sleep

(

s32

ms

)

Definition at line 72 of file crash_screen.c.

                                {
    u64 cycles = ms * 1000LL * 46875000LL / 1000000ULL;
 
    osSetTime(0);
 
    while (osGetTime() < cycles) {
        // wait
    }
}

crash_screen_draw_rect()

void crash_screen_draw_rect	(	s32	x,
		s32	y,
		s32	width,
		s32	height )

Definition at line 82 of file crash_screen.c.

                                                                 {
    u16* ptr;
    s32 i;
    s32 j;
 
    if (gCrashScreen.width == (SCREEN_WIDTH * 2)) {
        x <<= 1;
        y <<= 1;
        width <<= 1;
        height <<= 1;
    }
 
    ptr = gCrashScreen.frameBuf + gCrashScreen.width * y + x;
 
    for (i = 0; i < height; i++) {
        for (j = 0; j < width; j++) {
            *ptr = ((*ptr & 0xE738) >> 2) | 1;
            ptr++;
        }
 
        ptr += gCrashScreen.width - width;
    }
}

Referenced by crash_screen_draw(), and crash_screen_printf_with_bg().

crash_screen_draw_glyph()

s32 crash_screen_draw_glyph	(	s32	x,
		s32	y,
		s32	glyph )

Returns

X advance

Definition at line 107 of file crash_screen.c.

                                                     {
    s32 shift = ((glyph % 5) * 6);
    u16 width = gCrashScreen.width;
    const u32* data = &((u32*)gCrashScreenFont)[glyph / 5 * 7];
    s32 i;
    s32 j;
 
    switch (glyph) {
        case GLYPH(3, 10): // ;
        case GLYPH(4, 10): // ,
            y += 1;
            break;
        case GLYPH(1, 14): // g
        case GLYPH(0, 16): // p
        case GLYPH(1, 16): // q
        case GLYPH(4, 17): // y
            y += 2;
            break;
    }
 
    if (width == SCREEN_WIDTH) {
        u16* ptr = gCrashScreen.frameBuf + (gCrashScreen.width) * y + x;
 
        for (i = 0; i < 7; i++) {
            u32 bit = 0x80000000U >> shift;
            u32 rowMask = *data++;
 
            for (j = 0; j < 6; j++) {
                if (bit & rowMask) {
                    *ptr++ = 0xFFFF; // white
                } else {
                    ptr++; // dont draw
                }
                bit >>= 1;
            }
 
            ptr += gCrashScreen.width - 6;
        }
    } else if (width == (SCREEN_WIDTH * 2)) {
        u16* ptr = gCrashScreen.frameBuf + (y * 0x500) + (x * 2);
 
        for (i = 0; i < 7; i++) {
            u32 bit = 0x80000000U >> shift;
            u32 rowMask = *data++;
 
            for (j = 0; j < 6; j++) {
                u16 temp = (bit & rowMask) ? 0xFFFF : 1;
 
                ptr[0] = temp;
                ptr[1] = temp;
                ptr[(SCREEN_WIDTH * 2)] = temp;
                ptr[(SCREEN_WIDTH * 2) + 1] = temp;
                ptr += 2;
                bit >>= 1;
            }
 
            ptr += (0x9E8 / 2);
        }
    }
 
    // Calculate x advance by counting the width of the glyph + 1 pixel of padding
    if (glyph == GLYPH(2, 15)) return 7; // m - fucked up hack
    s32 xAdvance = 0;
    data = &((u32*)gCrashScreenFont)[glyph / 5 * 7];
    for (i = 0; i < 7; i++) { // 7 rows
        u32 bit = 0x80000000U >> shift;
        u32 rowMask = *data++;
        for (j = 1; j < 6; j++) { // 6 columns
            if (bit & rowMask) {
                if (xAdvance < j) {
                    xAdvance = j;
                }
            }
            bit >>= 1;
        }
    }
    return xAdvance + 1;
}

Referenced by crash_screen_printf(), crash_screen_printf_proportional(), and crash_screen_printf_with_bg().

crash_screen_copy_to_buf()

char * crash_screen_copy_to_buf	(	char *	dest,
		const char *	src,
		size_t	size )

Definition at line 186 of file crash_screen.c.

                                                                         {
    memcpy(dest, src, size);
    return dest + size;
}

Referenced by crash_screen_printf(), crash_screen_printf_proportional(), and crash_screen_printf_with_bg().

crash_screen_printf()

s32 crash_screen_printf	(	s32	x,
		s32	y,
		const char *	fmt,
			... )

Returns

Y advance

Definition at line 192 of file crash_screen.c.

                                                            {
    u8* ptr;
    u32 glyph;
    s32 size;
    u8 buf[0x100];
    va_list args;
    s32 ox = x;
 
    va_start(args, fmt);
 
    size = _Printf(crash_screen_copy_to_buf, (s8*)buf, fmt, args);
 
    if (size > 0) {
        ptr = buf;
 
        while (size > 0) {
            u8* charToGlyph = gCrashScreencharToGlyph;
 
            glyph = charToGlyph[*ptr & 0x7F];
 
            if (glyph != 0xFF) {
                crash_screen_draw_glyph(x, y, glyph);
            }
 
            x += 6;
 
            if (*ptr == '\n') {
                x = ox;
                y += 10;
            }
 
            size--;
            ptr++;
        }
    }
 
    // If last character was not a newline, move to the next line
    if (x != ox) {
        y += 10;
    }
    return y;
 
    va_end(args);
}

Referenced by crash_screen_draw(), crash_screen_print_fpcsr(), and crash_screen_print_fpr().

crash_screen_printf_proportional()

s32 crash_screen_printf_proportional	(	s32	x,
		s32	y,
		const char *	fmt,
			... )

Returns

Y advance

Definition at line 238 of file crash_screen.c.

                                                                         {
    u8* ptr;
    u32 glyph;
    s32 size;
    u8 buf[0x200];
    va_list args;
    s32 ox = x;
 
    va_start(args, fmt);
 
    size = _Printf(crash_screen_copy_to_buf, (s8*)buf, fmt, args);
 
    if (size > 0) {
        ptr = buf;
 
        while (size > 0) {
            u8* charToGlyph = gCrashScreencharToGlyph;
 
            glyph = charToGlyph[*ptr & 0x7F];
 
            if (glyph != 0xFF) {
                x += crash_screen_draw_glyph(x, y, glyph);
            } else {
                x += 4;
            }
 
            if (*ptr == '\n') {
                x = ox;
                y += 10;
            }
 
            size--;
            ptr++;
        }
    }
 
    // If last character was not a newline, move to the next line
    if (x != ox) {
        y += 10;
    }
    return y;
 
    va_end(args);
}

Referenced by crash_screen_draw().

crash_screen_print_fpr()

void crash_screen_print_fpr	(	s32	x,
		s32	y,
		s32	regNum,
		void *	addr )

Definition at line 283 of file crash_screen.c.

                                                                  {
    u32 bits = *(u32*)addr;
    s32 exponent = ((bits & 0x7F800000U) >> 0x17) - 0x7F;
 
    if ((exponent >= -0x7E && exponent <= 0x7F) || bits == 0) {
        crash_screen_printf(x, y, "F%02d:%+.3e", regNum, *(f32*)addr);
    } else {
        crash_screen_printf(x, y, "F%02d:---------", regNum);
    }
}

crash_screen_print_fpcsr()

void crash_screen_print_fpcsr

(

u32

value

)

Definition at line 294 of file crash_screen.c.

                                         {
    s32 i;
    u32 flag = 0x20000;
 
    crash_screen_printf(30, 155, "FPCSR:%08XH", value);
 
    for (i = 0; i < 6;) {
        if (value & flag) {
            crash_screen_printf(132, 155, "(%s)", gFPCSRFaultCauses[i]);
            break;
        }
 
        i++;
        flag >>= 1;
    }
}

crash_screen_draw()

void crash_screen_draw

(

OSThread *

faultedThread

)

Definition at line 311 of file crash_screen.c.

                                                {
    s16 causeIndex;
 
    s32 bt[8];
    s32 max = backtrace_thread((void**)bt, ARRAY_COUNT(bt), faultedThread);
    s32 i = 0;
    static char buf[0x200];
 
    causeIndex = ((faultedThread->context.cause >> 2) & 0x1F);
 
    if (causeIndex == 23) {
        causeIndex = 16;
    }
 
    if (causeIndex == 31) {
        causeIndex = 17;
    }
 
    osWritebackDCacheAll();
 
    s32 x = 10;
    s32 y = 10;
 
    crash_screen_draw_rect(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
 
    // Print error message
    b32 isException = FALSE;
    if (crashScreenAssertMessage[0] == '\0') {
        y += crash_screen_printf_proportional(x, y, "Exception in thread %d: %s", faultedThread->id, gFaultCauses[causeIndex]);
        isException = TRUE;
    } else {
        y += crash_screen_printf_proportional(x, y, crashScreenAssertMessage);
        i = 1; // Don't include is_debug_panic line in backtrace.
    }
 
    // Print register values
    // TODO: print registers relevant to the exception
    if (isException) {
        __OSThreadContext* ctx = &faultedThread->context;
        crash_screen_printf_proportional(x, y, "Registers:");
        y += 10;
        crash_screen_printf(x, y, "  a0 = 0x%08X     a1 = 0x%08X", (u32)ctx->a0, (u32)ctx->a1);
        y += 10;
        crash_screen_printf(x, y, "  a2 = 0x%08X     a3 = 0x%08X", (u32)ctx->a2, (u32)ctx->a3);
        y += 10;
 
        y += 10;
    }
 
    // Print backtrace
    crash_screen_printf_proportional(x, y, "Call stack:");
    y += 10;
    for (; i < max; i++) {
        backtrace_address_to_string(bt[i], buf);
        crash_screen_printf_proportional(x, y, "  in %s", buf);
        y += 10;
    }
 
    y += 10;
 
#ifndef DEBUG
    y += crash_screen_printf_proportional(x, y, "Build with `./configure --debug` for file/line numbers", buf);
#endif
 
    osViBlack(0);
    osViRepeatLine(0);
    osViSwapBuffer(gCrashScreen.frameBuf);
 
    /*
    crash_screen_draw_rect(0, 30, SCREEN_WIDTH, SCREEN_HEIGHT - 30);
 
    crash_screen_printf(30, 35, "PC:%08XH   SR:%08XH   VA:%08XH", ctx->pc, ctx->sr, ctx->badvaddr);
    crash_screen_printf(30, 50, "AT:%08XH   V0:%08XH   V1:%08XH", (u32)ctx->at, (u32)ctx->v0, (u32)ctx->v1);
    crash_screen_printf(30, 45, "A0: %08X   A1: %08X   A2: %08X", (u32)ctx->a0, (u32)ctx->a1, (u32)ctx->a2);
    crash_screen_printf(30, 70, "A3:%08XH   T0:%08XH   T1:%08XH", (u32)ctx->a3, (u32)ctx->t0, (u32)ctx->t1);
    crash_screen_printf(30, 80, "T2:%08XH   T3:%08XH   T4:%08XH", (u32)ctx->t2, (u32)ctx->t3, (u32)ctx->t4);
    crash_screen_printf(30, 90, "T5:%08XH   T6:%08XH   T7:%08XH", (u32)ctx->t5, (u32)ctx->t6, (u32)ctx->t7);
    crash_screen_printf(30, 100, "S0:%08XH   S1:%08XH   S2:%08XH", (u32)ctx->s0, (u32)ctx->s1, (u32)ctx->s2);
    crash_screen_printf(30, 110, "S3:%08XH   S4:%08XH   S5:%08XH", (u32)ctx->s3, (u32)ctx->s4, (u32)ctx->s5);
    crash_screen_printf(30, 120, "S6:%08XH   S7:%08XH   T8:%08XH", (u32)ctx->s6, (u32)ctx->s7, (u32)ctx->t8);
    crash_screen_printf(30, 130, "T9:%08XH   GP:%08XH   SP:%08XH", (u32)ctx->t9, (u32)ctx->gp, (u32)ctx->sp);
    crash_screen_printf(30, 140, "S8:%08XH   RA:%08XH", (u32)ctx->s8, (u32)ctx->ra);
 
    crash_screen_print_fpcsr(ctx->fpcsr);
 
    crash_screen_print_fpr(30, 170, 0, &ctx->fp0.f.f_even);
    crash_screen_print_fpr(120, 170, 2, &ctx->fp2.f.f_even);
    crash_screen_print_fpr(210, 170, 4, &ctx->fp4.f.f_even);
    crash_screen_print_fpr(30, 180, 6, &ctx->fp6.f.f_even);
    crash_screen_print_fpr(120, 180, 8, &ctx->fp8.f.f_even);
    crash_screen_print_fpr(210, 180, 10, &ctx->fp10.f.f_even);
    crash_screen_print_fpr(30, 190, 12, &ctx->fp12.f.f_even);
    crash_screen_print_fpr(120, 190, 14, &ctx->fp14.f.f_even);
    crash_screen_print_fpr(210, 190, 16, &ctx->fp16.f.f_even);
    crash_screen_print_fpr(30, 200, 18, &ctx->fp18.f.f_even);
    crash_screen_print_fpr(120, 200, 20, &ctx->fp20.f.f_even);
    crash_screen_print_fpr(210, 200, 22, &ctx->fp22.f.f_even);
    crash_screen_print_fpr(30, 210, 24, &ctx->fp24.f.f_even);
    crash_screen_print_fpr(120, 210, 26, &ctx->fp26.f.f_even);
    crash_screen_print_fpr(210, 210, 28, &ctx->fp28.f.f_even);
    crash_screen_print_fpr(30, 220, 30, &ctx->fp30.f.f_even);
 
    crash_screen_sleep(500);
 
    // all of these null terminators needed to pad the rodata section for this file
    // can potentially fix this problem in another way?
    crash_screen_printf(210, 140, "MM:%08XH\0\0\0\0\0\0\0\0", *(u32*)ctx->pc);
    */
}

Referenced by crash_screen_thread_entry().

crash_screen_get_faulted_thread()

OSThread * crash_screen_get_faulted_thread

(

void

)

Definition at line 421 of file crash_screen.c.

                                                {
    OSThread* thread = __osGetActiveQueue();
 
    while (thread->priority != -1) {
        if (thread->priority > 0 && thread->priority < 0x7F && (thread->flags & 3)) {
            return thread;
        }
 
        thread = thread->tlnext;
    }
 
    return NULL;
}

Referenced by crash_screen_thread_entry().

crash_screen_thread_entry()

void crash_screen_thread_entry

(

void *

unused

)

Definition at line 435 of file crash_screen.c.

                                             {
    OSMesg mesg;
    OSThread* faultedThread;
 
    osSetEventMesg(OS_EVENT_CPU_BREAK, &gCrashScreen.queue, (OSMesg)1);
    osSetEventMesg(OS_EVENT_FAULT, &gCrashScreen.queue, (OSMesg)2);
 
    do {
        osRecvMesg(&gCrashScreen.queue, &mesg, 1);
        faultedThread = crash_screen_get_faulted_thread();
    } while (faultedThread == NULL);
 
    osStopThread(faultedThread);
    crash_screen_draw(faultedThread);
 
    while (TRUE) {}
}

Referenced by crash_screen_init().

crash_screen_set_draw_info()

void crash_screen_set_draw_info	(	u16 *	frameBufPtr,
		s16	width,
		s16	height )

Definition at line 453 of file crash_screen.c.

                                                                         {
    gCrashScreen.frameBuf = (u16*)((u32)frameBufPtr | 0xA0000000);
    gCrashScreen.width = width;
    gCrashScreen.height = height;
}

Referenced by gfx_draw_frame().

crash_screen_init()

void crash_screen_init

(

void

)

Definition at line 459 of file crash_screen.c.

                             {
    gCrashScreen.width = SCREEN_WIDTH;
    gCrashScreen.height = 16;
    gCrashScreen.frameBuf = (u16*)((osMemSize | 0xA0000000) - ((SCREEN_WIDTH * SCREEN_HEIGHT) * 2));
    osCreateMesgQueue(&gCrashScreen.queue, &gCrashScreen.mesg, 1);
    osCreateThread(&gCrashScreen.thread, 2, crash_screen_thread_entry, NULL,
                   gCrashScreen.stack + sizeof(gCrashScreen.stack), 0x80);
    osStartThread(&gCrashScreen.thread);
 
    // gCrashScreencharToGlyph is hard to modify, so we'll just do it here
    u8 chars[] =
        "_[]<>"
        "|{};,"
        "\"#$&'"
        "/=@\\`"
        "abcde"
        "fghij"
        "klmno"
        "pqrst"
        "uvwxy"
        "z";
    s32 i;
    for (i = 0; i < ARRAY_COUNT(chars); i++) {
        gCrashScreencharToGlyph[chars[i]] = GLYPH(0, 9) + i;
    }
}

Referenced by boot_main().

crash_screen_printf_with_bg()

void crash_screen_printf_with_bg	(	s16	x,
		s16	y,
		const char *	fmt,
			... )

Definition at line 487 of file crash_screen.c.

                                                                     {
    u8* ptr;
    u32 glyph;
    s32 size;
    u8 buf[0x100];
    va_list args;
 
    va_start(args, fmt);
 
    size = _Printf(crash_screen_copy_to_buf, (s8*)buf, fmt, args);
 
    if (size > 0) {
        crash_screen_draw_rect(x - 6, y - 6, (size + 2) * 6, 19);
        ptr = buf;
 
        while (size > 0) {
            u8* charToGlyph = gCrashScreencharToGlyph;
 
            glyph = charToGlyph[*ptr & 0x7F];
 
            if (glyph != 0xFF) {
                crash_screen_draw_glyph(x, y, glyph);
            }
 
            x += 6;
            size--;
            ptr++;
        }
    }
 
    va_end(args);
}

Variable Documentation

gCrashScreen

BSS CrashScreen gCrashScreen

Definition at line 19 of file crash_screen.c.

Referenced by crash_screen_draw(), crash_screen_draw_glyph(), crash_screen_draw_rect(), crash_screen_init(), crash_screen_set_draw_info(), and crash_screen_thread_entry().

gCrashScreencharToGlyph

u8 gCrashScreencharToGlyph[128]

Initial value:

= {
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 41, -1, -1, -1, 43, -1, -1, 37, 38, -1, 42,
    -1, 39, 44, -1, 0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  36, -1, -1, -1, -1, 40, -1, 10,
    11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32,
    33, 34, 35, -1, -1, -1, -1, -1, -1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22,
    23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1,
}

Definition at line 21 of file crash_screen.c.

                                  {
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 41, -1, -1, -1, 43, -1, -1, 37, 38, -1, 42,
    -1, 39, 44, -1, 0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  36, -1, -1, -1, -1, 40, -1, 10,
    11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32,
    33, 34, 35, -1, -1, -1, -1, -1, -1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22,
    23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1,
};

Referenced by crash_screen_init(), crash_screen_printf(), crash_screen_printf_proportional(), and crash_screen_printf_with_bg().

gFaultCauses

const char* gFaultCauses[18]

Initial value:

= {
    "Interrupt",
    "TLB modification",
    "TLB exception on load",
    "TLB exception on store",
    "Address error on load",
    "Address error on store",
    "Bus error on inst.",
    "Bus error on data",
    "System call exception",
    "Breakpoint exception",
    "Reserved instruction",
    "Coprocessor unusable",
    "Arithmetic overflow",
    "Trap exception",
    "Virtual coherency on inst.",
    "Floating point exception",
    "Watchpoint exception",
    "Virtual coherency on data",
}

Definition at line 35 of file crash_screen.c.

                               {
    "Interrupt",
    "TLB modification",
    "TLB exception on load",
    "TLB exception on store",
    "Address error on load",
    "Address error on store",
    "Bus error on inst.",
    "Bus error on data",
    "System call exception",
    "Breakpoint exception",
    "Reserved instruction",
    "Coprocessor unusable",
    "Arithmetic overflow",
    "Trap exception",
    "Virtual coherency on inst.",
    "Floating point exception",
    "Watchpoint exception",
    "Virtual coherency on data",
};

Referenced by crash_screen_draw().

gFPCSRFaultCauses

const char* gFPCSRFaultCauses[6]

Initial value:

= {
    "Unimplemented operation",
    "Invalid operation",
    "Division by zero",
    "Overflow",
    "Underflow",
    "Inexact operation",
}

Definition at line 56 of file crash_screen.c.

                                   {
    "Unimplemented operation",
    "Invalid operation",
    "Division by zero",
    "Overflow",
    "Underflow",
    "Inexact operation",
};

Referenced by crash_screen_print_fpcsr().

crashScreenAssertMessage

char crashScreenAssertMessage[0x100] = {0}

Definition at line 65 of file crash_screen.c.

{0};

Referenced by crash_screen_draw(), and crash_screen_set_assert_info().