mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-01 11:52:47 +00:00
338 lines
8.5 KiB
ArmAsm
338 lines
8.5 KiB
ArmAsm
// The content of this file is AArch64-only:
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#if defined(__aarch64__)
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#include "sanitizer_common/sanitizer_asm.h"
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#if !defined(__APPLE__)
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.section .bss
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.type __tsan_pointer_chk_guard, %object
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ASM_SIZE(ASM_TSAN_SYMBOL_INTERCEPTOR(__tsan_pointer_chk_guard))
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__tsan_pointer_chk_guard:
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.zero 8
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#endif
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#if defined(__APPLE__)
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.align 2
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.section __DATA,__nl_symbol_ptr,non_lazy_symbol_pointers
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.long _setjmp$non_lazy_ptr
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_setjmp$non_lazy_ptr:
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.indirect_symbol _setjmp
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.long 0
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.section __DATA,__nl_symbol_ptr,non_lazy_symbol_pointers
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.long __setjmp$non_lazy_ptr
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__setjmp$non_lazy_ptr:
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.indirect_symbol __setjmp
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.long 0
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.section __DATA,__nl_symbol_ptr,non_lazy_symbol_pointers
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.long _sigsetjmp$non_lazy_ptr
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_sigsetjmp$non_lazy_ptr:
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.indirect_symbol _sigsetjmp
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.long 0
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#endif
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#if !defined(__APPLE__)
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.section .text
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#else
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.section __TEXT,__text
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.align 3
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#endif
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#if !defined(__APPLE__)
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// GLIBC mangles the function pointers in jmp_buf (used in {set,long}*jmp
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// functions) by XORing them with a random guard pointer. For AArch64 it is a
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// global variable rather than a TCB one (as for x86_64/powerpc) and althought
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// its value is exported by the loader, it lies within a private GLIBC
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// namespace (meaning it should be only used by GLIBC itself and the ABI is
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// not stable). So InitializeGuardPtr obtains the pointer guard value by
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// issuing a setjmp and checking the resulting pointers values against the
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// original ones.
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ASM_HIDDEN(_Z18InitializeGuardPtrv)
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.global _Z18InitializeGuardPtrv
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ASM_TYPE_FUNCTION(ASM_TSAN_SYMBOL_INTERCEPTOR(_Z18InitializeGuardPtrv))
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_Z18InitializeGuardPtrv:
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CFI_STARTPROC
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// Allocates a jmp_buf for the setjmp call.
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stp x29, x30, [sp, -336]!
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CFI_DEF_CFA_OFFSET (336)
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CFI_OFFSET (29, -336)
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CFI_OFFSET (30, -328)
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add x29, sp, 0
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CFI_DEF_CFA_REGISTER (29)
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add x0, x29, 24
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// Call libc setjmp that mangle the stack pointer value
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adrp x1, :got:_ZN14__interception12real__setjmpE
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ldr x1, [x1, #:got_lo12:_ZN14__interception12real__setjmpE]
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ldr x1, [x1]
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blr x1
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// glibc setjmp mangles both the frame pointer (FP, pc+4 on blr) and the
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// stack pointer (SP). FP will be placed on ((uintptr*)jmp_buf)[11] and
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// SP at ((uintptr*)jmp_buf)[13].
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// The mangle operation is just 'value' xor 'pointer guard value' and
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// if we know the original value (SP) and the expected one, we can derive
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// the guard pointer value.
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mov x0, sp
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// Loads the mangled SP pointer.
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ldr x1, [x29, 128]
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eor x0, x0, x1
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adrp x2, __tsan_pointer_chk_guard
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str x0, [x2, #:lo12:__tsan_pointer_chk_guard]
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ldp x29, x30, [sp], 336
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CFI_RESTORE (30)
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CFI_RESTORE (19)
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CFI_DEF_CFA (31, 0)
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ret
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CFI_ENDPROC
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ASM_SIZE(ASM_TSAN_SYMBOL_INTERCEPTOR(_Z18InitializeGuardPtrv))
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#endif
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ASM_HIDDEN(__tsan_setjmp)
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.comm _ZN14__interception11real_setjmpE,8,8
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.globl ASM_TSAN_SYMBOL_INTERCEPTOR(setjmp)
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ASM_TYPE_FUNCTION(ASM_TSAN_SYMBOL_INTERCEPTOR(setjmp))
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ASM_TSAN_SYMBOL_INTERCEPTOR(setjmp):
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CFI_STARTPROC
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// save env parameters for function call
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stp x29, x30, [sp, -32]!
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CFI_DEF_CFA_OFFSET (32)
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CFI_OFFSET (29, -32)
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CFI_OFFSET (30, -24)
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// Adjust the SP for previous frame
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add x29, sp, 0
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CFI_DEF_CFA_REGISTER (29)
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// Save jmp_buf
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str x19, [sp, 16]
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CFI_OFFSET (19, -16)
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mov x19, x0
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#if !defined(__APPLE__)
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// SP pointer mangling (see glibc setjmp)
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adrp x2, __tsan_pointer_chk_guard
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ldr x2, [x2, #:lo12:__tsan_pointer_chk_guard]
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add x0, x29, 32
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eor x1, x2, x0
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#else
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add x0, x29, 32
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mov x1, x0
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#endif
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// call tsan interceptor
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bl ASM_TSAN_SYMBOL(__tsan_setjmp)
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// restore env parameter
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mov x0, x19
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ldr x19, [sp, 16]
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ldp x29, x30, [sp], 32
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CFI_RESTORE (30)
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CFI_RESTORE (19)
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CFI_DEF_CFA (31, 0)
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// tail jump to libc setjmp
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#if !defined(__APPLE__)
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adrp x1, :got:_ZN14__interception11real_setjmpE
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ldr x1, [x1, #:got_lo12:_ZN14__interception11real_setjmpE]
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ldr x1, [x1]
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#else
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adrp x1, _setjmp$non_lazy_ptr@page
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add x1, x1, _setjmp$non_lazy_ptr@pageoff
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ldr x1, [x1]
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#endif
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br x1
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CFI_ENDPROC
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ASM_SIZE(ASM_TSAN_SYMBOL_INTERCEPTOR(setjmp))
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.comm _ZN14__interception12real__setjmpE,8,8
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.globl ASM_TSAN_SYMBOL_INTERCEPTOR(_setjmp)
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ASM_TYPE_FUNCTION(ASM_TSAN_SYMBOL_INTERCEPTOR(_setjmp))
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ASM_TSAN_SYMBOL_INTERCEPTOR(_setjmp):
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CFI_STARTPROC
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// save env parameters for function call
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stp x29, x30, [sp, -32]!
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CFI_DEF_CFA_OFFSET (32)
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CFI_OFFSET (29, -32)
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CFI_OFFSET (30, -24)
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// Adjust the SP for previous frame
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add x29, sp, 0
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CFI_DEF_CFA_REGISTER (29)
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// Save jmp_buf
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str x19, [sp, 16]
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CFI_OFFSET (19, -16)
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mov x19, x0
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#if !defined(__APPLE__)
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// SP pointer mangling (see glibc setjmp)
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adrp x2, __tsan_pointer_chk_guard
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ldr x2, [x2, #:lo12:__tsan_pointer_chk_guard]
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add x0, x29, 32
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eor x1, x2, x0
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#else
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add x0, x29, 32
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mov x1, x0
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#endif
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// call tsan interceptor
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bl ASM_TSAN_SYMBOL(__tsan_setjmp)
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// Restore jmp_buf parameter
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mov x0, x19
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ldr x19, [sp, 16]
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ldp x29, x30, [sp], 32
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CFI_RESTORE (30)
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CFI_RESTORE (19)
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CFI_DEF_CFA (31, 0)
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// tail jump to libc setjmp
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#if !defined(__APPLE__)
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adrp x1, :got:_ZN14__interception12real__setjmpE
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ldr x1, [x1, #:got_lo12:_ZN14__interception12real__setjmpE]
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ldr x1, [x1]
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#else
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adrp x1, __setjmp$non_lazy_ptr@page
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add x1, x1, __setjmp$non_lazy_ptr@pageoff
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ldr x1, [x1]
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#endif
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br x1
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CFI_ENDPROC
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ASM_SIZE(ASM_TSAN_SYMBOL_INTERCEPTOR(_setjmp))
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.comm _ZN14__interception14real_sigsetjmpE,8,8
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.globl ASM_TSAN_SYMBOL_INTERCEPTOR(sigsetjmp)
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ASM_TYPE_FUNCTION(ASM_TSAN_SYMBOL_INTERCEPTOR(sigsetjmp))
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ASM_TSAN_SYMBOL_INTERCEPTOR(sigsetjmp):
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CFI_STARTPROC
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// save env parameters for function call
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stp x29, x30, [sp, -32]!
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CFI_DEF_CFA_OFFSET (32)
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CFI_OFFSET (29, -32)
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CFI_OFFSET (30, -24)
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// Adjust the SP for previous frame
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add x29, sp, 0
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CFI_DEF_CFA_REGISTER (29)
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// Save jmp_buf and savesigs
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stp x19, x20, [sp, 16]
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CFI_OFFSET (19, -16)
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CFI_OFFSET (20, -8)
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mov w20, w1
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mov x19, x0
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#if !defined(__APPLE__)
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// SP pointer mangling (see glibc setjmp)
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adrp x2, __tsan_pointer_chk_guard
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ldr x2, [x2, #:lo12:__tsan_pointer_chk_guard]
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add x0, x29, 32
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eor x1, x2, x0
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#else
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add x0, x29, 32
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mov x1, x0
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#endif
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// call tsan interceptor
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bl ASM_TSAN_SYMBOL(__tsan_setjmp)
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// restore env parameter
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mov w1, w20
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mov x0, x19
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ldp x19, x20, [sp, 16]
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ldp x29, x30, [sp], 32
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CFI_RESTORE (30)
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CFI_RESTORE (29)
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CFI_RESTORE (19)
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CFI_RESTORE (20)
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CFI_DEF_CFA (31, 0)
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// tail jump to libc sigsetjmp
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#if !defined(__APPLE__)
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adrp x2, :got:_ZN14__interception14real_sigsetjmpE
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ldr x2, [x2, #:got_lo12:_ZN14__interception14real_sigsetjmpE]
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ldr x2, [x2]
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#else
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adrp x2, _sigsetjmp$non_lazy_ptr@page
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add x2, x2, _sigsetjmp$non_lazy_ptr@pageoff
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ldr x2, [x2]
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#endif
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br x2
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CFI_ENDPROC
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ASM_SIZE(ASM_TSAN_SYMBOL_INTERCEPTOR(sigsetjmp))
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#if !defined(__APPLE__)
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.comm _ZN14__interception16real___sigsetjmpE,8,8
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.globl ASM_TSAN_SYMBOL_INTERCEPTOR(__sigsetjmp)
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ASM_TYPE_FUNCTION(ASM_TSAN_SYMBOL_INTERCEPTOR(__sigsetjmp))
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ASM_TSAN_SYMBOL_INTERCEPTOR(__sigsetjmp):
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CFI_STARTPROC
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// save env parameters for function call
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stp x29, x30, [sp, -32]!
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CFI_DEF_CFA_OFFSET (32)
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CFI_OFFSET (29, -32)
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CFI_OFFSET (30, -24)
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// Adjust the SP for previous frame
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add x29, sp, 0
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CFI_DEF_CFA_REGISTER (29)
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// Save jmp_buf and savesigs
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stp x19, x20, [sp, 16]
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CFI_OFFSET (19, -16)
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CFI_OFFSET (20, -8)
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mov w20, w1
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mov x19, x0
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#if !defined(__APPLE__)
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// SP pointer mangling (see glibc setjmp)
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adrp x2, __tsan_pointer_chk_guard
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ldr x2, [x2, #:lo12:__tsan_pointer_chk_guard]
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add x0, x29, 32
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eor x1, x2, x0
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#endif
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// call tsan interceptor
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bl ASM_TSAN_SYMBOL(__tsan_setjmp)
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mov w1, w20
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mov x0, x19
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ldp x19, x20, [sp, 16]
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ldp x29, x30, [sp], 32
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CFI_RESTORE (30)
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CFI_RESTORE (29)
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CFI_RESTORE (19)
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CFI_RESTORE (20)
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CFI_DEF_CFA (31, 0)
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// tail jump to libc __sigsetjmp
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#if !defined(__APPLE__)
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adrp x2, :got:_ZN14__interception16real___sigsetjmpE
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ldr x2, [x2, #:got_lo12:_ZN14__interception16real___sigsetjmpE]
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ldr x2, [x2]
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#else
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adrp x2, ASM_TSAN_SYMBOL(__sigsetjmp)@page
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add x2, x2, ASM_TSAN_SYMBOL(__sigsetjmp)@pageoff
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#endif
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br x2
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CFI_ENDPROC
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ASM_SIZE(ASM_TSAN_SYMBOL_INTERCEPTOR(__sigsetjmp))
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#endif
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#if defined(__linux__)
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/* We do not need executable stack. */
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.section .note.GNU-stack,"",@progbits
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#endif
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#endif
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