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lfs: Call UnMountArchive before Mount, Prevent potential issues in the RegisterArchive interface

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fangrong 2025-09-28 15:44:04 +08:00 committed by TuxSH
parent 407c18e6fd
commit d3d9a63bf2
3 changed files with 18 additions and 4 deletions
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16
sysmodules/loader/source/patcher.c
View File

@ -148,7 +148,7 @@ static u32 findFunctionStart(u8 *code, u32 pos)
return 0xFFFFFFFF;
}
static inline bool findLayeredFsSymbols(u8 *code, u32 size, u32 *fsMountArchive, u32 *fsRegisterArchive, u32 *fsTryOpenFile, u32 *fsOpenFileDirectly)
static inline bool findLayeredFsSymbols(u8 *code, u32 size, u32 *fsMountArchive, u32 *fsRegisterArchive, u32 *fsTryOpenFile, u32 *fsOpenFileDirectly, u32 *fsUnMountArchive)
{
u32 found = 0,
*temp = NULL;
@ -165,6 +165,12 @@ static inline bool findLayeredFsSymbols(u8 *code, u32 size, u32 *fsMountArchive,
case 0xE24DD028:
if(addr <= size - 16 && *fsMountArchive == 0xFFFFFFFF && addr32[1] == 0xE1A04000 && addr32[2] == 0xE59F60A8 && addr32[3] == 0xE3A0C001) temp = fsMountArchive;
break;
case 0xE2844001:
if(addr <= size - 12 && *fsUnMountArchive == 0xFFFFFFFF && addr32[1] == 0xE3540020 && addr32[2] == 0x3AFFFFF0) temp = fsUnMountArchive;
break;
case 0xE353003A:
if(addr <= size - 12 && *fsUnMountArchive == 0xFFFFFFFF && (addr32[1] & 0xFFFFFF0F) == 0x0A000009 && (addr32[2] & 0xFFFF0FF0) == 0xE1A00400) temp = fsUnMountArchive;
break;
case 0xE3500008:
if(addr <= size - 12 && *fsRegisterArchive == 0xFFFFFFFF && (addr32[1] & 0xFFF00FF0) == 0xE1800400 && (addr32[2] & 0xFFF00FF0) == 0xE1800FC0) temp = fsRegisterArchive;
break;
@ -183,14 +189,14 @@ static inline bool findLayeredFsSymbols(u8 *code, u32 size, u32 *fsMountArchive,
if(*temp != 0xFFFFFFFF)
{
found++;
if(found == 4) break;
if(found == 5) break;
}
temp = NULL;
}
}
return found == 4;
return found == 5;
}
static inline bool findLayeredFsPayloadOffset(u8 *code, u32 size, u32 roSize, u32 dataSize, u32 roAddress, u32 dataAddress, u32 *payloadOffset, u32 *pathOffset, u32 *pathAddress)
@ -569,6 +575,7 @@ static inline bool patchLayeredFs(u64 progId, u8 *code, u32 size, u32 textSize,
if(!archiveId) return true;
u32 fsMountArchive = 0xFFFFFFFF,
fsUnMountArchive = 0xFFFFFFFF,
fsRegisterArchive = 0xFFFFFFFF,
fsTryOpenFile = 0xFFFFFFFF,
fsOpenFileDirectly = 0xFFFFFFFF,
@ -576,7 +583,7 @@ static inline bool patchLayeredFs(u64 progId, u8 *code, u32 size, u32 textSize,
pathOffset = 0,
pathAddress = 0xDEADCAFE;
if(!findLayeredFsSymbols(code, textSize, &fsMountArchive, &fsRegisterArchive, &fsTryOpenFile, &fsOpenFileDirectly) ||
if(!findLayeredFsSymbols(code, textSize, &fsMountArchive, &fsRegisterArchive, &fsTryOpenFile, &fsOpenFileDirectly, &fsUnMountArchive) ||
!findLayeredFsPayloadOffset(code, textSize, roSize, dataSize, roAddress, dataAddress, &payloadOffset, &pathOffset, &pathAddress)) return false;
static const char *updateRomFsMounts[] = { "ro2:",
@ -625,6 +632,7 @@ static inline bool patchLayeredFs(u64 progId, u8 *code, u32 size, u32 textSize,
romfsRedirPatchHook2 = MAKE_BRANCH(payloadOffset + (u32)&romfsRedirPatchHook2 - (u32)romfsRedirPatch, fsTryOpenFile + 4);
romfsRedirPatchCustomPath = pathAddress;
romfsRedirPatchFsMountArchive = 0x100000 + fsMountArchive;
romfsRedirPatchFsUnMountArchive = 0x100000 + fsUnMountArchive;
romfsRedirPatchFsRegisterArchive = 0x100000 + fsRegisterArchive;
romfsRedirPatchArchiveId = archiveId;
memcpy(&romfsRedirPatchUpdateRomFsMount, updateRomFsMount, 4);

1
sysmodules/loader/source/romfsredir.h
View File

@ -10,6 +10,7 @@ extern u32 romfsRedirPatchSubstituted2, romfsRedirPatchHook2;
extern u32 romfsRedirPatchArchiveName;
extern u32 romfsRedirPatchFsMountArchive;
extern u32 romfsRedirPatchFsUnMountArchive;
extern u32 romfsRedirPatchFsRegisterArchive;
extern u32 romfsRedirPatchArchiveId;
extern u32 romfsRedirPatchRomFsMount;

5
sysmodules/loader/source/romfsredir.s
View File

@ -30,6 +30,9 @@ romfsRedirPatch:
cmp r3, #3
bne romfsRedirPatchSubstituted1
stmfd sp!, {r0-r4, lr}
adr r0, romfsRedirPatchArchiveName
ldr r4, romfsRedirPatchFsUnMountArchive
blx r4
sub sp, sp, #4
ldr r1, romfsRedirPatchArchiveId
mov r0, sp
@ -109,6 +112,7 @@ romfsRedirPatch:
.global romfsRedirPatchArchiveName
.global romfsRedirPatchFsMountArchive
.global romfsRedirPatchFsUnMountArchive
.global romfsRedirPatchFsRegisterArchive
.global romfsRedirPatchArchiveId
.global romfsRedirPatchRomFsMount
@ -117,6 +121,7 @@ romfsRedirPatch:
romfsRedirPatchArchiveName : .ascii "lf:\0"
romfsRedirPatchFsMountArchive : .word 0xdead0005
romfsRedirPatchFsUnMountArchive : .word 0xdead0009
romfsRedirPatchFsRegisterArchive : .word 0xdead0006
romfsRedirPatchArchiveId : .word 0xdead0007
romfsRedirPatchRomFsMount : .ascii "rom:"