* Copyright (c) 1999-2011 Apple Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
- *
+ *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this
* file.
- *
+ *
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
+ *
* @APPLE_LICENSE_HEADER_END@
*/
/*
*
* | STRING AREA |
* +-------------+
- * | 0 |
+ * | 0 |
* +-------------+
* | apple[n] |
* +-------------+
* :
* +-------------+
- * | apple[0] |
- * +-------------+
+ * | apple[0] |
+ * +-------------+
* | 0 |
* +-------------+
* | env[n] |
*/
-
- // Hack to make _offset_to_dyld_all_image_infos work
- // Without this local symbol, assembler will error out about in subtraction expression
- // The real _dyld_all_image_infos (non-weak) _dyld_all_image_infos is defined in dyld_gdb.o
- // and the linker with throw this one away and use the real one instead.
- .section __DATA,__datacoal_nt,coalesced
- .globl _dyld_all_image_infos
- .weak_definition _dyld_all_image_infos
-_dyld_all_image_infos: .long 0
-
-
+#include <TargetConditionals.h>
.globl __dyld_start
-#ifdef __i386__
- .data
-__dyld_start_static_picbase:
- .long L__dyld_start_picbase
-Lmh: .long ___dso_handle
-
- .text
- .align 2
-# stable entry points into dyld
- .globl _stub_binding_helper
-_stub_binding_helper:
- jmp _stub_binding_helper_interface
- nop
- nop
- nop
- .globl _dyld_func_lookup
-_dyld_func_lookup:
- jmp __Z18lookupDyldFunctionPKcPm
- nop
- nop
- nop
-_offset_to_dyld_all_image_infos:
- .long _dyld_all_image_infos - . + 0x1010
- .long 0
- # space for future stable entry points
- .space 16
-
-
-
+#if __i386__ && !TARGET_OS_SIMULATOR
.text
.align 4, 0x90
.globl __dyld_start
movl %esp,%ebp # pointer to base of kernel frame
andl $-16,%esp # force SSE alignment
subl $32,%esp # room for locals and outgoing parameters
-
+
call L__dyld_start_picbase
-L__dyld_start_picbase:
+L__dyld_start_picbase:
popl %ebx # set %ebx to runtime value of picbase
- movl Lmh-L__dyld_start_picbase(%ebx), %ecx # ecx = prefered load address
- movl __dyld_start_static_picbase-L__dyld_start_picbase(%ebx), %eax
- subl %eax, %ebx # ebx = slide = L__dyld_start_picbase - [__dyld_start_static_picbase]
- addl %ebx, %ecx # ecx = actual load address
- # call dyldbootstrap::start(app_mh, argc, argv, slide, dyld_mh, &startGlue)
+ # call dyldbootstrap::start(app_mh, argc, argv, dyld_mh, &startGlue)
+ subl $L__dyld_start_picbase-__dyld_start, %ebx # ebx = &__dyld_start
+ subl $0x1000, %ebx # ebx = load address of dyld
movl %edx,(%esp) # param1 = app_mh
- movl 4(%ebp),%eax
+ movl 4(%ebp),%eax
movl %eax,4(%esp) # param2 = argc
- lea 8(%ebp),%eax
+ lea 8(%ebp),%eax
movl %eax,8(%esp) # param3 = argv
- movl %ebx,12(%esp) # param4 = slide
- movl %ecx,16(%esp) # param5 = actual load address
+ movl %ebx,12(%esp) # param4 = dyld load address
lea 28(%esp),%eax
- movl %eax,20(%esp) # param6 = &startGlue
- call __ZN13dyldbootstrap5startEPK12macho_headeriPPKclS2_Pm
+ movl %eax,16(%esp) # param5 = &startGlue
+ call __ZN13dyldbootstrap5startEPKN5dyld311MachOLoadedEiPPKcS3_Pm
movl 28(%esp),%edx
cmpl $0,%edx
jne Lnew
movl $0,%ebp # restore ebp back to zero
jmp *%eax # jump to the entry point
- # LC_MAIN case, set up stack for call to main()
+ # LC_MAIN case, set up stack for call to main()
Lnew: movl 4(%ebp),%ebx
movl %ebx,(%esp) # main param1 = argc
leal 8(%ebp),%ecx
movl %ebx,12(%esp) # main param4 = apple
pushl %edx # simulate return address into _start in libdyld
jmp *%eax # jump to main(argc,argv,env,apple) with return address set to _start
-
-
- .globl dyld_stub_binding_helper
-dyld_stub_binding_helper:
- hlt
-L_end:
-#endif /* __i386__ */
+#endif /* __i386__ && !TARGET_OS_SIMULATOR*/
-#if __x86_64__
- .data
- .align 3
-__dyld_start_static:
- .quad __dyld_start
-
-# stable entry points into dyld
- .text
- .align 2
- .globl _stub_binding_helper
-_stub_binding_helper:
- jmp _stub_binding_helper_interface
- nop
- nop
- nop
- .globl _dyld_func_lookup
-_dyld_func_lookup:
- jmp __Z18lookupDyldFunctionPKcPm
- nop
- nop
- nop
-_offset_to_dyld_all_image_infos:
- .long _dyld_all_image_infos - . + 0x1010
- .long 0
- # space for future stable entry points
- .space 16
-
+#if __x86_64__ && !TARGET_OS_SIMULATOR
.text
.align 2,0x90
.globl __dyld_start
movq %rsp,%rbp # pointer to base of kernel frame
andq $-16,%rsp # force SSE alignment
subq $16,%rsp # room for local variables
-
- # call dyldbootstrap::start(app_mh, argc, argv, slide, dyld_mh, &startGlue)
+
+ # call dyldbootstrap::start(app_mh, argc, argv, dyld_mh, &startGlue)
movl 8(%rbp),%esi # param2 = argc into %esi
leaq 16(%rbp),%rdx # param3 = &argv[0] into %rdx
- movq __dyld_start_static(%rip), %r8
- leaq __dyld_start(%rip), %rcx
- subq %r8, %rcx # param4 = slide into %rcx
- leaq ___dso_handle(%rip),%r8 # param5 = dyldsMachHeader
- leaq -8(%rbp),%r9
- call __ZN13dyldbootstrap5startEPK12macho_headeriPPKclS2_Pm
+ leaq ___dso_handle(%rip),%rcx # param4 = dyldsMachHeader into %rcx
+ leaq -8(%rbp),%r8 # param5 = &glue into %r8
+ call __ZN13dyldbootstrap5startEPKN5dyld311MachOLoadedEiPPKcS3_Pm
movq -8(%rbp),%rdi
cmpq $0,%rdi
jne Lnew
addq $8,%rsp # remove the mh argument, and debugger end frame marker
movq $0,%rbp # restore ebp back to zero
jmp *%rax # jump to the entry point
-
- # LC_MAIN case, set up stack for call to main()
+
+ # LC_MAIN case, set up stack for call to main()
Lnew: addq $16,%rsp # remove local variables
pushq %rdi # simulate return address into _start in libdyld
movq 8(%rbp),%rdi # main param1 = argc into %rdi
testq %r8,%r8 # look for NULL ending env[] array
jne Lapple # main param4 = apple into %rcx
jmp *%rax # jump to main(argc,argv,env,apple) with return address set to _start
-
-#endif /* __x86_64__ */
+#endif /* __x86_64__ && !TARGET_OS_SIMULATOR*/
#if __arm__
- .syntax unified
- .data
- .align 2
-__dyld_start_static_picbase:
- .long L__dyld_start_picbase
-
- .text
- .align 2
- .globl _stub_binding_helper
-_stub_binding_helper:
- b _stub_binding_helper_interface
- nop
-
- .globl _dyld_func_lookup
-_dyld_func_lookup:
- b _branch_to_lookupDyldFunction
- nop
-
-_offset_to_dyld_all_image_infos:
- .long _dyld_all_image_infos - . + 0x1010
- .long 0
- # space for future stable entry points
- .space 16
-
-
- // Hack to make ___dso_handle work
- // Without this local symbol, assembler will error out about in subtraction expression
- // The real ___dso_handle (non-weak) sythesized by the linker
- // Since this one is weak, the linker will throw this one away and use the real one instead.
- .data
- .globl ___dso_handle
- .weak_definition ___dso_handle
-___dso_handle: .long 0
-
.text
.align 2
__dyld_start:
mov r8, sp // save stack pointer
sub sp, #16 // make room for outgoing parameters
- bic sp, sp, #7 // force 8-byte alignment
-
- // call dyldbootstrap::start(app_mh, argc, argv, slide, dyld_mh, &startGlue)
-
- ldr r3, L__dyld_start_picbase_ptr
-L__dyld_start_picbase:
- sub r0, pc, #8 // load actual PC
- ldr r3, [r0, r3] // load expected PC
- sub r3, r0, r3 // r3 = slide
+ bic sp, sp, #15 // force 16-byte alignment
+ // call dyldbootstrap::start(app_mh, argc, argv, dyld_mh, &startGlue)
ldr r0, [r8] // r0 = mach_header
ldr r1, [r8, #4] // r1 = argc
add r2, r8, #8 // r2 = argv
-
- ldr r4, Lmh
-L3: add r4, r4, pc
- str r4, [sp, #0] // [sp] = dyld_mh
+ adr r3, __dyld_start
+ sub r3 ,r3, #0x1000 // r3 = dyld_mh
add r4, sp, #12
- str r4, [sp, #4] // [sp+4] = &startGlue
-
- bl __ZN13dyldbootstrap5startEPK12macho_headeriPPKclS2_Pm
+ str r4, [sp, #0] // [sp] = &startGlue
+
+ bl __ZN13dyldbootstrap5startEPKN5dyld311MachOLoadedEiPPKcS3_Pm
ldr r5, [sp, #12]
cmp r5, #0
bne Lnew
-
+
// traditional case, clean up stack and jump to result
add sp, r8, #4 // remove the mach_header argument.
bx r0 // jump to the program's entry point
mov r5, r0 // save address of main() for later use
ldr r0, [r8, #4] // main param1 = argc
add r1, r8, #8 // main param2 = argv
- add r2, r1, r0, lsl #2
+ add r2, r1, r0, lsl #2
add r2, r2, #4 // main param3 = &env[0]
mov r3, r2
Lapple: ldr r4, [r3]
bne Lapple // main param4 = apple
bx r5
- .align 2
-L__dyld_start_picbase_ptr:
- .long __dyld_start_static_picbase-L__dyld_start_picbase
-Lmh: .long ___dso_handle-L3-8
-
- .text
- .align 2
-_branch_to_lookupDyldFunction:
- // arm has no "bx label" instruction, so need this island in case lookupDyldFunction() is in thumb
- ldr ip, L2
-L1: ldr pc, [pc, ip]
-L2: .long _lookupDyldFunction_ptr-8-L1
-
- .data
- .align 2
-_lookupDyldFunction_ptr:
- .long __Z18lookupDyldFunctionPKcPm
-
-
- .text
- .globl dyld_stub_binding_helper
-dyld_stub_binding_helper:
- trap
-
-L_end:
#endif /* __arm__ */
-/*
- * dyld calls this function to terminate a process.
- * It has a label so that CrashReporter can distinguish this
- * termination from a random crash. rdar://problem/4764143
- */
+
+
+
+#if __arm64__ && !TARGET_OS_SIMULATOR
.text
.align 2
- .globl _dyld_fatal_error
-_dyld_fatal_error:
-#if __arm__
- trap
- nop
-#elif __x86_64__ || __i386__
- int3
- nop
+ .globl __dyld_start
+__dyld_start:
+ mov x28, sp
+ and sp, x28, #~15 // force 16-byte alignment of stack
+ mov x0, #0
+ mov x1, #0
+ stp x1, x0, [sp, #-16]! // make aligned terminating frame
+ mov fp, sp // set up fp to point to terminating frame
+ sub sp, sp, #16 // make room for local variables
+#if __LP64__
+ ldr x0, [x28] // get app's mh into x0
+ ldr x1, [x28, #8] // get argc into x1 (kernel passes 32-bit int argc as 64-bits on stack to keep alignment)
+ add x2, x28, #16 // get argv into x2
#else
- #error unknown architecture
+ ldr w0, [x28] // get app's mh into x0
+ ldr w1, [x28, #4] // get argc into x1 (kernel passes 32-bit int argc as 64-bits on stack to keep alignment)
+ add w2, w28, #8 // get argv into x2
#endif
+ adrp x3,___dso_handle@page
+ add x3,x3,___dso_handle@pageoff // get dyld's mh in to x4
+ mov x4,sp // x5 has &startGlue
+
+ // call dyldbootstrap::start(app_mh, argc, argv, dyld_mh, &startGlue)
+ bl __ZN13dyldbootstrap5startEPKN5dyld311MachOLoadedEiPPKcS3_Pm
+ mov x16,x0 // save entry point address in x16
+#if __LP64__
+ ldr x1, [sp]
+#else
+ ldr w1, [sp]
+#endif
+ cmp x1, #0
+ b.ne Lnew
-#if __arm__
- // work around for: <rdar://problem/6530727> gdb-1109: notifier in dyld does not work if it is in thumb
- .text
- .align 2
- .globl _gdb_image_notifier
- .private_extern _gdb_image_notifier
-_gdb_image_notifier:
- bx lr
+ // LC_UNIXTHREAD way, clean up stack and jump to result
+#if __LP64__
+ add sp, x28, #8 // restore unaligned stack pointer without app mh
+#else
+ add sp, x28, #4 // restore unaligned stack pointer without app mh
+#endif
+#if __arm64e__
+ braaz x16 // jump to the program's entry point
+#else
+ br x16 // jump to the program's entry point
#endif
+ // LC_MAIN case, set up stack for call to main()
+Lnew: mov lr, x1 // simulate return address into _start in libdyld.dylib
+#if __LP64__
+ ldr x0, [x28, #8] // main param1 = argc
+ add x1, x28, #16 // main param2 = argv
+ add x2, x1, x0, lsl #3
+ add x2, x2, #8 // main param3 = &env[0]
+ mov x3, x2
+Lapple: ldr x4, [x3]
+ add x3, x3, #8
+#else
+ ldr w0, [x28, #4] // main param1 = argc
+ add x1, x28, #8 // main param2 = argv
+ add x2, x1, x0, lsl #2
+ add x2, x2, #4 // main param3 = &env[0]
+ mov x3, x2
+Lapple: ldr w4, [x3]
+ add x3, x3, #4
+#endif
+ cmp x4, #0
+ b.ne Lapple // main param4 = apple
+#if __arm64e__
+ braaz x16
+#else
+ br x16
+#endif
+#endif // __arm64__ && !TARGET_OS_SIMULATOR
+// When iOS 10.0 simulator runs on 10.11, abort_with_payload() does not exist,
+// so it falls back and uses dyld_fatal_error().
+#if TARGET_OS_SIMULATOR
+ .text
+ .align 2
+ .globl _dyld_fatal_error
+_dyld_fatal_error:
+#if __arm64__ || __arm64e__
+ brk #3
+#else
+ int3
+#endif
+ nop
+#endif
+
projects / apple / dyld.git / blobdiff