LowLevel/Luma3DS-3GX
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Fix itcm sections overwriting argv

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This commit is contained in:
TuxSH 2019-03-15 20:36:20 +01:00
parent 0bb82feb81
commit 0195ab34e9
2 changed files with 18 additions and 21 deletions
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26
arm9/source/main.c
View File

@ -39,6 +39,8 @@
#include "i2c.h"
#include "fatfs/sdmmc/sdmmc.h"
extern u8 __itcm_start__[], __itcm_lma__[], __itcm_bss_start__[], __itcm_end__[];
extern CfgData configData;
extern ConfigurationStatus needConfig;
extern FirmwareSource firmSource;
@ -53,13 +55,13 @@ void main(int argc, char **argv, u32 magicWord)
isSafeMode = false,
needToInitSd = false,
isNoForceFlagSet = false,
isInvalidLoader = false,
isNtrBoot;
FirmwareType firmType;
FirmwareSource nandType;
const vu8 *bootMediaStatus = (const vu8 *)0x1FFFE00C;
const vu32 *bootPartitionsStatus = (const vu32 *)0x1FFFE010;
I2C_init();
char firmlaunchTid[16+1];
//Shell closed, no error booting NTRCARD, NAND paritions not even considered
isNtrBoot = bootMediaStatus[3] == 2 && !bootMediaStatus[1] && !bootPartitionsStatus[0] && !bootPartitionsStatus[1];
@ -82,6 +84,8 @@ void main(int argc, char **argv, u32 magicWord)
for(i = 0; i < sizeof(launchedPath)/2 - 1 && p[i] != 0; i++)
launchedPath[i] = p[i];
launchedPath[i] = 0;
strncpy(firmlaunchTid, argv[1], 16);
}
else if(magicWord == 0xB002) //FIRM/NTRCARD boot
{
@ -106,7 +110,16 @@ void main(int argc, char **argv, u32 magicWord)
setupKeyslots();
}
else error("Launched using an unsupported loader.");
else isInvalidLoader = true;
// Set up the additional sections, overwrites argc
memcpy(__itcm_start__, __itcm_lma__, __itcm_bss_start__ - __itcm_start__);
memset(__itcm_bss_start__, 0, __itcm_end__ - __itcm_bss_start__);
I2C_init();
if(isInvalidLoader) error("Launched using an unsupported loader.");
detectAndProcessExceptionDumps();
installArm9Handlers();
if(memcmp(launchedPath, u"sdmc", 8) == 0)
{
@ -151,10 +164,10 @@ void main(int argc, char **argv, u32 magicWord)
{
if(needConfig == CREATE_CONFIGURATION) mcuPowerOff();
switch(argv[1][14])
switch(firmlaunchTid[14])
{
case '2':
firmType = (FirmwareType)(argv[1][10] - '0');
firmType = (FirmwareType)(firmlaunchTid[10] - '0');
break;
case '3':
firmType = SAFE_FIRM;
@ -171,9 +184,6 @@ void main(int argc, char **argv, u32 magicWord)
goto boot;
}
detectAndProcessExceptionDumps();
installArm9Handlers();
firmType = NATIVE_FIRM;
isFirmProtEnabled = bootType != NTR;

13
arm9/source/start.s
View File

@ -115,19 +115,6 @@ _start:
sub r2, r0
bl memset
@ Set additional sections up
ldr r0, =__itcm_start__
ldr r1, =__itcm_lma__
ldr r2, =__itcm_bss_start__
sub r2, r0
bl memcpy
ldr r0, =__itcm_bss_start__
mov r1, #0
ldr r2, =__itcm_end__
sub r2, r0
bl memset
bl __libc_init_array
mov r0, r9