85 lines
1.5 KiB
ArmAsm
85 lines
1.5 KiB
ArmAsm
.thumb
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.syntax unified
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start:
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// <-
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push {r0-r4, lr}
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sub sp, #0x44
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ldr r4, [r3, #0x14]
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cmp r4, #0
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beq actually_eval
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ldr r3, vn_getpath
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mov r1, sp
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movs r0, #0x40
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add r2, sp, #0x40
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str r0, [r2]
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mov r0, r4
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blx r3
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cmp r0, #28
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beq enospc
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cmp r0, #0
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bne actually_eval
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enospc:
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# that error's okay...
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mov r0, sp
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adr r1, string
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movs r2, #19 ;# "/private/var/mobile"
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ldr r3, memcmp
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blx r3
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cmp r0, #0
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bne allow
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mov r0, sp
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adr r1, string
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movs r2, #49 ;# "/private/var/mobile/Library/Preferences/com.apple"
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ldr r3, memcmp
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blx r3
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cmp r0, #0
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beq actually_eval
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mov r0, sp
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adr r1, string
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movs r2, #39 ;# "/private/var/mobile/Library/Preferences"
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ldr r3, memcmp
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blx r3
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cmp r0, #0
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bne actually_eval
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allow:
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# it's not in /var/mobile but we have a path, let it through
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add sp, #0x44
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pop {r0}
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movs r1, #0
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str r1, [r0]
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movs r1, #0x18
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strb r1, [r0, #4]
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pop {r1-r4, pc}
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actually_eval:
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add sp, #0x44
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ldr r0, [sp, #5*4]
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mov lr, r0
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ldr r1, orig_addr
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mov r9, r1
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pop {r0-r4}
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add sp, #4
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#ifndef __ARM_ARCH_7A__
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bx pc
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.align 2
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.arm
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#endif
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.long c_sb_evaluate_orig1
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.long c_sb_evaluate_orig2
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.long c_sb_evaluate_orig3
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.long c_sb_evaluate_orig4
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bx r9
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.align 2
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string: .ascii "/private/var/mobile/Library/Preferences/com.apple"
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.align 2
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orig_addr: .long c_sb_evaluate_jumpto
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memcmp: .long c_memcmp
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vn_getpath: .long c_vn_getpath
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