Added TWL/AGB FIRM patching/SD loading for New and Old 3DS (thanks to mid-kid of CakesFW for making it possible!)
This commit is contained in:
Aurora
parent
993e564fbb
commit
a181bba9f2
@ -23,6 +23,7 @@ static u32 loadPayload(const char *path)
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void main(void)
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{
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FATFS fs;
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f_mount(&fs, "0:", 1);
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//Get pressed buttons
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397
patches/reboot.s
397
patches/reboot.s
@ -1,221 +1,232 @@
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.arm.little
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byteswritten equ 0x2000E000
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kernelCode equ 0x080F0000
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buffer equ 0x24000000
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fileOpen equ 0x4E45504F ;dummy
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firm_addr equ 0x24000000 ; Temporary location where we'll load the FIRM to
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firm_maxsize equ 0x200000 ; Random value that's bigger than any of the currently known firm's sizes.
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kernel_code equ 0x080F0000
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.create "reboot.bin", 0
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.arm
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//Code jumps here right after the sprintf call
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process9Reboot:
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doPxi:
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ldr r4, =0x44846
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ldr r0, =0x10008000
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readPxiLoop1:
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ldrh r1, [r0,#4]
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.word 0xE1B01B81 //lsls r1, r1, #0x17
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bmi readPxiLoop1
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ldr r0, [r0,#0xC]
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cmp r0, r4
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bne doPxi
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; Interesting registers and locations to keep in mind, set before this code is ran:
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; - sp + 0x3A8 - 0x70: FIRM path in exefs.
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; - r7 (which is sp + 0x3A8 - 0x198): Reserved space for file handle
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; - *(sp + 0x3A8 - 0x198) + 0x28: fread function.
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GetFirmPath:
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add r0, sp, #0x3A8-0x70+0x24
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ldr r1, [r0], #4
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ldr r2, =0x00300030
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cmp r1, r2
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ldreq r1, [r0], #4
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ldreq r2, =0x002F0032
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cmpeq r1, r2
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pxi_wait_recv:
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ldr r2, =0x44846
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ldr r0, =0x10008000
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readPxiLoop1:
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ldrh r1, [r0, #4]
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lsls r1, #0x17
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bmi readPxiLoop1
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ldr r0, [r0, #0xC]
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cmp r0, r2
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bne pxi_wait_recv
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OpenFirm:
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ldreq r1, =(FileName - OpenFirm - 12)
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addeq r1, pc
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addne r1, sp, #0x3A8-0x70
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moveq r2, #1
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movne r2, #0
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str r2, [externalFirm]
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mov r2, #1
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add r0, r7, #8
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ldr r6, =fileOpen
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blx r6
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; Convert 2 bytes of the path string
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; This will be the method of getting the lower 2 bytes of the title ID
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; until someone bothers figuring out where the value is derived from.
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mov r0, #0 ; Result
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add r1, sp, #0x3A8 - 0x70
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add r1, #0x22 ; The significant bytes
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mov r2, #4 ; Maximum loops (amount of bytes * 2)
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SeekFirm:
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ldr r0, [externalFirm]
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cmp r0, #1
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moveq r0, r7
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ldreq r1, =byteswritten
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ldreq r2, =buffer
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ldreq r3, =0x0
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ldreq r6, [sp,#0x3A8-0x198]
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ldreq r6, [r6,#0x28] //fread function stored here
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blxeq r6
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hex_string_to_int_loop:
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ldr r3, [r1], #2 ; 2 because it's a utf-16 string.
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and r3, #0xFF
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ReadFirm:
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; Check if it"s a number
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cmp r3, #'0'
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blo hex_string_to_int_end
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sub r3, #'0'
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cmp r3, #9
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bls hex_string_to_int_calc
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; Check if it"s a capital letter
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cmp r3, #'A' - '0'
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blo hex_string_to_int_end
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sub r3, #'A' - '0' - 0xA ; Make the correct value: 0xF >= al >= 0xA
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cmp r3, #0xF
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bls hex_string_to_int_calc
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; Incorrect value: x > "A"
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bhi hex_string_to_int_end
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hex_string_to_int_calc:
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orr r0, r3, r0, lsl #4
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subs r2, #1
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bne hex_string_to_int_loop
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hex_string_to_int_end:
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; Get the FIRM path
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cmp r0, #0x0002 ; NATIVE_FIRM
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adreq r1, firm_fname
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beq load_firm
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ldr r5, =0x0102 ; TWL_FIRM
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cmp r0, r5
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adreq r1, twlfirm_fname
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beq load_firm
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ldr r5, =0x0202 ; AGB_FIRM
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cmp r0, r5
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adreq r1, agbfirm_fname
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beq load_firm
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bne fallback ; TODO: Stubbed
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fallback:
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; Fallback: Load specified FIRM from exefs
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add r1, sp, #0x3A8-0x70 ; Location of exefs string.
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b load_firm
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load_firm:
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; Open file
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add r0, r7, #8
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mov r2, #1
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ldr r6, [fopen]
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orr r6, 1
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blx r6
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cmp r0, #0 ; Check if we were able to load the FIRM
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bne fallback ; Otherwise, try again with the FIRM from exefs.
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; This will loop indefinitely if the exefs FIRM fails to load, but whatever.
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; Read file
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mov r0, r7
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ldr r1, =byteswritten
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ldr r2, =buffer
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ldr r3, =0x200000
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ldr r6, [sp,#0x3A8-0x198]
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ldr r6, [r6,#0x28] //fread function stored here
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adr r1, bytes_read
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mov r2, firm_addr
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mov r3, firm_maxsize
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ldr r6, [sp, #0x3A8-0x198]
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ldr r6, [r6, #0x28]
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blx r6
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KernelSetState:
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mov r2, #0
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mov r3, r2
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mov r1, r2
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mov r0, r2
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.word 0xEF00007C //SVC 0x7C
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; Set kernel state
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mov r0, #0
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mov r1, #0
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mov r2, #0
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mov r3, #0
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swi 0x7C
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GoToReboot:
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ldr r0, =(KernelCodeStart - GoToReboot - 12)
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add r0, pc
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ldr r1, =kernelCode
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ldr r2, =0x300
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bl Memcpy
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goto_reboot:
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; Jump to reboot code
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ldr r0, =(kernelcode_start - goto_reboot - 12)
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add r0, pc
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ldr r1, =kernel_code
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ldr r2, =0x300
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bl memcpy32
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ldr r0, =kernel_code
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swi 0x7B
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ldr r0, =kernelCode
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.word 0xEF00007B //SVC 0x7B
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die:
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b die
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InfiniteLoop:
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b InfiniteLoop
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Memcpy:
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MOV R12, LR
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STMFD SP!, {R0-R4}
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ADD R2, R2, R0
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memcpyLoop:
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LDR R3, [R0],#4
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STR R3, [R1],#4
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CMP R0, R2
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BLT memcpyLoop
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LDMFD SP!, {R0-R4}
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MOV LR, R12
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BX LR
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FileName:
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.dcw "sdmc:/aurei/patched_firmware_sys.bin"
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.word 0x0
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externalFirm:
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.word 0x2000A000
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memcpy32: ; memcpy32(void *src, void *dst, unsigned int size)
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add r2, r0
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memcpy32_loop:
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ldmia r0!, {r3}
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stmia r1!, {r3}
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cmp r0, r2
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blo memcpy32_loop
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bx lr
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bytes_read: .word 0
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fopen: .ascii "OPEN"
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.pool
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firm_fname: .dcw "sdmc:/aurei/patched_firmware_sys.bin"
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.word 0x0
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.pool
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twlfirm_fname: .dcw "sdmc:/aurei/patched_firmware_twl.bin"
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.word 0x0
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.pool
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agbfirm_fname: .dcw "sdmc:/aurei/patched_firmware_agb.bin"
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.word 0x0
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// Kernel Code
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.align 4
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KernelCodeStart:
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memorySetting:
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MRC p15, 0, R0,c2,c0, 0
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MRC p15, 0, R12,c2,c0, 1
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MRC p15, 0, R1,c3,c0, 0
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MRC p15, 0, R2,c5,c0, 2
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MRC p15, 0, R3,c5,c0, 3
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LDR R4, =0x18000035
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BIC R2, R2, #0xF0000
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BIC R3, R3, #0xF0000
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ORR R0, R0, #0x10
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ORR R2, R2, #0x30000
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ORR R3, R3, #0x30000
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ORR R12, R12, #0x10
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ORR R1, R1, #0x10
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MCR p15, 0, R0,c2,c0, 0
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MCR p15, 0, R12,c2,c0, 1
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MCR p15, 0, R1,c3,c0, 0
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MCR p15, 0, R2,c5,c0, 2
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MCR p15, 0, R3,c5,c0, 3
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MCR p15, 0, R4,c6,c4, 0
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MRC p15, 0, R0,c2,c0, 0
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MRC p15, 0, R1,c2,c0, 1
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MRC p15, 0, R2,c3,c0, 0
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ORR R0, R0, #0x20
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ORR R1, R1, #0x20
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ORR R2, R2, #0x20
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MCR p15, 0, R0,c2,c0, 0
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MCR p15, 0, R1,c2,c0, 1
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MCR p15, 0, R2,c3,c0, 0
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kernelcode_start:
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; Set MPU settings
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mrc p15, 0, r0, c2, c0, 0 ; dcacheable
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mrc p15, 0, r12, c2, c0, 1 ; icacheable
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mrc p15, 0, r1, c3, c0, 0 ; write bufferable
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mrc p15, 0, r2, c5, c0, 2 ; daccess
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mrc p15, 0, r3, c5, c0, 3 ; iaccess
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ldr r4, =0x18000035 ; 0x18000000 128M
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bic r2, r2, #0xF0000 ; unprotect region 4
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bic r3, r3, #0xF0000 ; unprotect region 4
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orr r0, r0, #0x10 ; dcacheable region 4
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orr r2, r2, #0x30000 ; region 4 r/w
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orr r3, r3, #0x30000 ; region 4 r/w
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orr r12, r12, #0x10 ; icacheable region 4
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orr r1, r1, #0x10 ; write bufferable region 4
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mcr p15, 0, r0, c2, c0, 0
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mcr p15, 0, r12, c2, c0, 1
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mcr p15, 0, r1, c3, c0, 0 ; write bufferable
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mcr p15, 0, r2, c5, c0, 2 ; daccess
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mcr p15, 0, r3, c5, c0, 3 ; iaccess
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mcr p15, 0, r4, c6, c4, 0 ; region 4 (hmmm)
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copyFirmPartitions:
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LDR R4, =buffer
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ADD R3, R4, #0x40
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LDR R0, [R3]
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ADD R0, R0, R4
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LDR R1, [R3,#4]
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LDR R2, [R3,#8]
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bl KernelMemcpy
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mrc p15, 0, r0, c2, c0, 0 ; dcacheable
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mrc p15, 0, r1, c2, c0, 1 ; icacheable
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mrc p15, 0, r2, c3, c0, 0 ; write bufferable
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orr r0, r0, #0x20 ; dcacheable region 5
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orr r1, r1, #0x20 ; icacheable region 5
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orr r2, r2, #0x20 ; write bufferable region 5
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mcr p15, 0, r0, c2, c0, 0 ; dcacheable
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mcr p15, 0, r1, c2, c0, 1 ; icacheable
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mcr p15, 0, r2, c3, c0, 0 ; write bufferable
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ADD R3, R4, #0x70
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LDR R0, [R3]
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ADD R0, R0, R4
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LDR R1, [R3,#4]
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LDR R2, [R3,#8]
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bl KernelMemcpy
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; Copy the firmware
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mov r4, firm_addr
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add r5, r4, #0x40 ; Start of loop
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add r6, r5, #0x30 * 3 ; End of loop (scan 4 entries)
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ADD R3, R4, #0xA0
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LDR R0, [R3]
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ADD R0, R0, R4
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LDR R1, [R3,#4]
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LDR R2, [R3,#8]
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bl KernelMemcpy
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copy_firm_loop:
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ldr r0, [r5]
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cmp r0, #0
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addne r0, r4 ; src
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ldrne r1, [r5, #4] ; dest
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ldrne r2, [r5, #8] ; size
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blne kernelmemcpy32
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ADD R3, R4, #0xD0
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LDR R0, [R3]
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CMP R0, #0
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BEQ invalidateDataCache
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ADD R0, R0, R4
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LDR R1, [R3,#4]
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LDR R2, [R3,#8]
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bl KernelMemcpy
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cmp r5, r6
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addlo r5, #0x30
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blo copy_firm_loop
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invalidateDataCache:
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MOV R2, #0
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MOV R1, R2
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loc_809460C:
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MOV R0, #0
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MOV R3, R2,LSL#30
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loc_8094614:
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ORR R12, R3, R0,LSL#5
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MCR p15, 0, R1,c7,c10, 4
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MCR p15, 0, R12,c7,c14, 2
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ADD R0, R0, #1
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CMP R0, #0x20
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BCC loc_8094614
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ADD R2, R2, #1
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CMP R2, #4
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BCC loc_809460C
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; Flush cache
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mov r2, #0
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mov r1, r2
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flush_cache:
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mov r0, #0
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mov r3, r2, lsl #30
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flush_cache_inner_loop:
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orr r12, r3, r0, lsl#5
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mcr p15, 0, r1, c7, c10, 4 ; drain write buffer
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mcr p15, 0, r12, c7, c14, 2 ; clean and flush dcache entry (index and segment)
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add r0, #1
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cmp r0, #0x20
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bcc flush_cache_inner_loop
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add r2, #1
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cmp r2, #4
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bcc flush_cache
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jumpToEntrypoint:
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MCR p15, 0, R1,c7,c10, 4
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LDR R0, =0x42078
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MCR p15, 0, R0,c1,c0, 0
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MCR p15, 0, R1,c7,c5, 0
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MCR p15, 0, R1,c7,c6, 0
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MCR p15, 0, R1,c7,c10, 4
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LDR R4, =buffer
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MOV R1, #0x1FFFFFFC
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LDR R2, [R4,#8]
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STR R2, [R1]
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LDR R0, [R4,#0xC]
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BX R0
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; Enable MPU
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ldr r0, =0x42078 ; alt vector select, enable itcm
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mcr p15, 0, r0, c1, c0, 0
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mcr p15, 0, r1, c7, c5, 0 ; flush dcache
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mcr p15, 0, r1, c7, c6, 0 ; flush icache
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mcr p15, 0, r1, c7, c10, 4 ; drain write buffer
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mov r0, firm_addr
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; Boot FIRM
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mov r1, #0x1FFFFFFC
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ldr r2, [r0, #8] ; arm11 entry
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str r2, [r1]
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ldr r0, [r0, #0xC] ; arm9 entry
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bx r0
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.pool
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KernelMemcpy:
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MOV R12, LR
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STMFD SP!, {R0-R4}
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ADD R2, R2, R0
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kmemcpyLoop:
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LDR R3, [R0],#4
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STR R3, [R1],#4
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CMP R0, R2
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BLT kmemcpyLoop
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LDMFD SP!, {R0-R4}
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MOV LR, R12
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BX LR
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.pool
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KernelCodeEnd:
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kernelmemcpy32: ; memcpy32(void *src, void *dst, unsigned int size)
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add r2, r0
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kmemcpy32_loop:
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ldmia r0!, {r3}
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stmia r1!, {r3}
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cmp r0, r2
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blo kmemcpy32_loop
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bx lr
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.close
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@ -26,7 +26,9 @@ static u8 *arm9Section;
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static const char *patchedFirms[] = { "/aurei/patched_firmware_sys.bin",
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"/aurei/patched_firmware_emu.bin",
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"/aurei/patched_firmware_em2.bin",
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"/aurei/patched_firmware90.bin" };
|
||||
"/aurei/patched_firmware90.bin",
|
||||
"/aurei/patched_firmware_twl.bin",
|
||||
"/aurei/patched_firmware_agb.bin" };
|
||||
|
||||
static u32 firmSize,
|
||||
console,
|
||||
@ -212,6 +214,80 @@ void loadFirm(void)
|
||||
if(console && !usePatchedFirm) decryptArm9Bin(arm9Section, mode);
|
||||
}
|
||||
|
||||
static inline void patchTwlAgb(u32 mode)
|
||||
{
|
||||
static firmHeader *const twlAgbFirm = (firmHeader *)0x25000000;
|
||||
|
||||
const char *path = mode ? "aurei/firmware_agb.bin" : "aurei/firmware_twl.bin";
|
||||
u32 size = fileSize(path);
|
||||
|
||||
//Skip patching
|
||||
if(!size) return;
|
||||
|
||||
fileRead(twlAgbFirm, path, size);
|
||||
|
||||
const firmSectionHeader *twlAgbSection = twlAgbFirm->section;
|
||||
|
||||
//Check that the loaded FIRM matches the console
|
||||
if((((u32)twlAgbSection[3].address >> 8) & 0xFF) != (console ? 0x60 : 0x68))
|
||||
error(mode ? "aurei/firmware_agb.bin doesn't match this\nconsole, or it's encrypted" :
|
||||
"aurei/firmware_twl.bin doesn't match this\nconsole, or it's encrypted");
|
||||
|
||||
if(console) decryptArm9Bin((u8 *)twlAgbFirm + twlAgbSection[3].offset, 0);
|
||||
|
||||
struct patchData {
|
||||
u32 offset[2];
|
||||
union {
|
||||
u8 type0[8];
|
||||
u16 type1;
|
||||
} patch;
|
||||
u32 type;
|
||||
};
|
||||
|
||||
const struct patchData twlPatches[] = {
|
||||
{{0x1650C0, 0x165D64}, {{ 6, 0x00, 0x20, 0x4E, 0xB0, 0x70, 0xBD }}, 0},
|
||||
{{0x173A0E, 0x17474A}, { .type1 = 0x2001 }, 1},
|
||||
{{0x174802, 0x17553E}, { .type1 = 0x2000 }, 2},
|
||||
{{0x174964, 0x1756A0}, { .type1 = 0x2000 }, 2},
|
||||
{{0x174D52, 0x175A8E}, { .type1 = 0x2001 }, 2},
|
||||
{{0x174D5E, 0x175A9A}, { .type1 = 0x2001 }, 2},
|
||||
{{0x174D6A, 0x175AA6}, { .type1 = 0x2001 }, 2},
|
||||
{{0x174E56, 0x175B92}, { .type1 = 0x2001 }, 1},
|
||||
{{0x174E58, 0x175B94}, { .type1 = 0x4770 }, 1}
|
||||
};
|
||||
|
||||
const struct patchData agbPatches[] = {
|
||||
{{0x9D2A8, 0x9DF64}, {{ 6, 0x00, 0x20, 0x4E, 0xB0, 0x70, 0xBD }}, 0},
|
||||
{{0xD7A12, 0xD8B8A}, { .type1 = 0xEF26 }, 1}
|
||||
};
|
||||
|
||||
//Calculate the amount of patches to apply
|
||||
u32 numPatches = mode ? (sizeof(agbPatches) / sizeof(struct patchData)) : (sizeof(twlPatches) / sizeof(struct patchData));
|
||||
const struct patchData *patches = mode ? agbPatches : twlPatches;
|
||||
|
||||
//Patch
|
||||
for(u32 i = 0; i < numPatches; i++)
|
||||
{
|
||||
switch(patches[i].type)
|
||||
{
|
||||
case 0:
|
||||
memcpy((u8 *)twlAgbFirm + patches[i].offset[console], patches[i].patch.type0 + 1, patches[i].patch.type0[0]);
|
||||
break;
|
||||
case 2:
|
||||
*(u16 *)((u8 *)twlAgbFirm + patches[i].offset[console] + 2) = 0;
|
||||
case 1:
|
||||
*(u16 *)((u8 *)twlAgbFirm + patches[i].offset[console]) = patches[i].patch.type1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
//Patch ARM9 entrypoint on N3DS to skip arm9loader
|
||||
if(console)
|
||||
twlAgbFirm->arm9Entry = (u8 *)0x801301C;
|
||||
|
||||
fileWrite(twlAgbFirm, mode ? patchedFirms[5] : patchedFirms[4], size);
|
||||
}
|
||||
|
||||
//NAND redirection
|
||||
static inline void patchEmuNAND(u8 *proc9Offset)
|
||||
{
|
||||
@ -297,6 +373,10 @@ static inline void injectLoader(void)
|
||||
//Patches
|
||||
void patchFirm(void)
|
||||
{
|
||||
//Only patch AGB_FIRM/TWL_FIRM if the patched ones don't already exist
|
||||
if(!fileExists(patchedFirms[4])) patchTwlAgb(0);
|
||||
if(!fileExists(patchedFirms[5])) patchTwlAgb(1);
|
||||
|
||||
//Skip patching
|
||||
if(usePatchedFirm) return;
|
||||
|
||||
|
||||
Reference in New Issue
Block a user