Acelogic
1510d8c6ce
An EL2 monitor/hypervisor and toolchain that boots macOS 27 on the ASUS A16 (Snapdragon X2 Elite), with an Adreno Metal plug-in and IOGPU kext, and air2ir3, an AIR to Mesa ir3 shader compiler. MIT, with GPL-2.0 components listed in LICENSE and THIRD_PARTY_NOTICES.md. No Apple, Qualcomm, ASUS or Microsoft binaries are included.
48 lines
2.4 KiB
C
48 lines
2.4 KiB
C
/* SPDX-License-Identifier: MIT */
|
|
#include "sep-bootstrap.h"
|
|
|
|
static uint32_t u32(const uint8_t *p)
|
|
{
|
|
return (uint32_t)p[0]|(uint32_t)p[1]<<8|(uint32_t)p[2]<<16|(uint32_t)p[3]<<24;
|
|
}
|
|
enum sep_bootstrap_result sep_bootstrap_parse(const struct sep_bootstrap_reader *r,
|
|
uint64_t size,struct sep_bootstrap *out)
|
|
{
|
|
if(!r || !r->read || !out || size!=0x14000)return SEP_BOOTSTRAP_BAD_SIZE;
|
|
uint8_t directory[64],data[36];
|
|
if(!r->read(r->ctx,0,sizeof directory,directory))return SEP_BOOTSTRAP_READ_FAILED;
|
|
const uint32_t names[3]={0x504e4943,0x464c4147,0x53434f54};
|
|
const uint32_t lengths[3]={0x8000,0x4000,0x4000};
|
|
uint32_t offsets[3]={0,0,0};
|
|
if(u32(directory+48)!=0x6e756c6c || u32(directory+52) ||
|
|
u32(directory+56) || u32(directory+60))return SEP_BOOTSTRAP_BAD_DIRECTORY;
|
|
for(unsigned i=0;i<3;i++) {
|
|
const uint8_t *entry=directory+16*i;
|
|
uint32_t name=u32(entry),length=u32(entry+4),offset=u32(entry+8);
|
|
unsigned kind=0;while(kind<3 && names[kind]!=name)kind++;
|
|
if(kind==3 || offsets[kind] || u32(entry+12) || length!=lengths[kind] ||
|
|
offset<0x4000 || (offset&0x3fff) || offset>size-length)
|
|
return SEP_BOOTSTRAP_BAD_DIRECTORY;
|
|
for(unsigned j=0;j<3;j++)if(offsets[j] &&
|
|
offset<offsets[j]+lengths[j] && offsets[j]<offset+length)
|
|
return SEP_BOOTSTRAP_BAD_DIRECTORY;
|
|
offsets[kind]=offset;
|
|
}
|
|
if(!r->read(r->ctx,offsets[0],4,data))return SEP_BOOTSTRAP_READ_FAILED;
|
|
if(u32(data)!=1)return SEP_BOOTSTRAP_BAD_CONTENT;
|
|
if(!r->read(r->ctx,offsets[1],sizeof data,data))return SEP_BOOTSTRAP_READ_FAILED;
|
|
if(u32(data)!=32)return SEP_BOOTSTRAP_BAD_CONTENT;
|
|
const uint32_t flags[4]={0x78415254,0x5345504f,0x66697073,0x53455044};
|
|
for(unsigned i=0;i<4;i++)if(u32(data+4+i*8)!=flags[i] || u32(data+8+i*8))
|
|
return SEP_BOOTSTRAP_BAD_CONTENT;
|
|
if(!r->read(r->ctx,offsets[2],sizeof data,data))return SEP_BOOTSTRAP_READ_FAILED;
|
|
if(u32(data)!=32)return SEP_BOOTSTRAP_BAD_CONTENT;
|
|
const char scot[32]="This is my wonderful test data!";
|
|
for(unsigned i=0;i<32;i++)if(data[i+4]!=(uint8_t)scot[i])return SEP_BOOTSTRAP_BAD_CONTENT;
|
|
/* All reads and policy checks precede publication of the parsed result. */
|
|
out->panic_offset=offsets[0];out->panic_size=lengths[0];
|
|
out->flags_offset=offsets[1];out->scot_offset=offsets[2];
|
|
for(unsigned i=0;i<4;i++)out->flags[i]=0;
|
|
return SEP_BOOTSTRAP_OK;
|
|
}
|