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pkg2: Improve Ini1 kernel offset code per hekate

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shchmue 2020-04-14 15:10:51 -06:00
parent ef6676d3b9
commit a7d20c5814
2 changed files with 26 additions and 6 deletions
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28
source/hos/pkg2.c
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@ -1,6 +1,6 @@
/* /*
* Copyright (c) 2018 naehrwert * Copyright (c) 2018 naehrwert
* Copyright (c) 2018-2019 CTCaer * Copyright (c) 2018-2020 CTCaer
* Copyright (c) 2018 Atmosphère-NX * Copyright (c) 2018 Atmosphère-NX
* *
* This program is free software; you can redistribute it and/or modify it * This program is free software; you can redistribute it and/or modify it
@ -41,12 +41,32 @@ static u32 _pkg2_calc_kip1_size(pkg2_kip1_t *kip1)
void pkg2_get_newkern_info(u8 *kern_data) void pkg2_get_newkern_info(u8 *kern_data)
{ {
u32 info_op = *(u32 *)(kern_data + PKG2_NEWKERN_GET_INI1); u32 pkg2_newkern_ini1_off = 0;
pkg2_newkern_ini1_val = ((info_op & 0xFFFF) >> 3) + PKG2_NEWKERN_GET_INI1; // Parse ADR and PC. pkg2_newkern_ini1_start = 0;
// Find static OP offset that is close to INI1 offset.
u32 counter_ops = 0x100;
while (counter_ops)
{
if (*(u32 *)(kern_data + 0x100 - counter_ops) == PKG2_NEWKERN_GET_INI1_HEURISTIC)
{
pkg2_newkern_ini1_off = 0x100 - counter_ops + 12; // OP found. Add 12 for the INI1 offset.
break;
}
counter_ops -= 4;
}
// Offset not found?
if (!counter_ops)
return;
u32 info_op = *(u32 *)(kern_data + pkg2_newkern_ini1_off);
pkg2_newkern_ini1_val = ((info_op & 0xFFFF) >> 3) + pkg2_newkern_ini1_off; // Parse ADR and PC.
pkg2_newkern_ini1_start = *(u32 *)(kern_data + pkg2_newkern_ini1_val); pkg2_newkern_ini1_start = *(u32 *)(kern_data + pkg2_newkern_ini1_val);
pkg2_newkern_ini1_end = *(u32 *)(kern_data + pkg2_newkern_ini1_val + 0x8); pkg2_newkern_ini1_end = *(u32 *)(kern_data + pkg2_newkern_ini1_val + 0x8);
} }
void pkg2_parse_kips(link_t *info, pkg2_hdr_t *pkg2, bool *new_pkg2) void pkg2_parse_kips(link_t *info, pkg2_hdr_t *pkg2, bool *new_pkg2)
{ {

4
source/hos/pkg2.h
View file

@ -1,6 +1,6 @@
/* /*
* Copyright (c) 2018 naehrwert * Copyright (c) 2018 naehrwert
* Copyright (C) 2018-2019 CTCaer * Copyright (C) 2018-2020 CTCaer
* *
* This program is free software; you can redistribute it and/or modify it * This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License, * under the terms and conditions of the GNU General Public License,
@ -26,7 +26,7 @@
#define PKG2_SEC_KERNEL 0 #define PKG2_SEC_KERNEL 0
#define PKG2_SEC_INI1 1 #define PKG2_SEC_INI1 1
#define PKG2_NEWKERN_GET_INI1 0x44 #define PKG2_NEWKERN_GET_INI1_HEURISTIC 0xD2800015 // Offset of OP + 12 is the INI1 offset.
u32 pkg2_newkern_ini1_val; u32 pkg2_newkern_ini1_val;
u32 pkg2_newkern_ini1_start; u32 pkg2_newkern_ini1_start;