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#include "objc.h"
.text
.align _PAGE_SHIFT
#ifdef __arm__
.thumb_func _remap_start
.thumb
#endif
.globl _remap_start
_remap_start:
.set i, 0
#define my_rpe (0b + (_PAGE_SIZE - i * TRAMPOLINE_SIZE + i * TRAMP_INFO_PAGE_ENTRY_SIZE))
.rept TRAMPOLINES_PER_PAGE
0:
#if defined(__x86_64__)
/* double push for align */
push %rdi; push %rsi; push %rdx; push %rcx; push %r8; push %r9; push %r9
lea my_rpe(%rip), %rdx
mov 8(%rdx), %rdi
mov 16(%rdx), %rsi
call *(%rdx)
pop %r9; pop %r9; pop %r8; pop %rcx; pop %rdx; pop %rsi; pop %rdi
jmp *%rax
#elif defined(__i386__)
call 1f
1:
pop %edx
lea my_rpe-1b(%edx), %edx
push 8(%edx)
push 4(%edx)
call *(%edx)
add $$8, %esp
jmp *%eax
#elif defined(__arm__)
push {r0-r4, lr} /* r4 for align */
mov r3, #:lower16:(my_rpe - (1f + 2))
add r3, pc
1:
ldr r0, [r3, #4]
ldr r1, [r3, #8]
ldr r2, [r3]
blx r2
mov r9, r0
pop {r0-r4, lr}
bx r9
#elif defined(__arm64__)
stp x30, x8, [sp, #-0x10]!
stp x7, x6, [sp, #-0x10]!
stp x5, x4, [sp, #-0x10]!
stp x3, x2, [sp, #-0x10]!
stp x1, x0, [sp, #-0x10]!
ldr x0, my_rpe+8
ldr x1, my_rpe+0x10
ldr x2, my_rpe
blr x2
mov x9, x0
ldp x1, x0, [sp], #0x10
ldp x3, x2, [sp], #0x10
ldp x5, x4, [sp], #0x10
ldp x7, x6, [sp], #0x10
ldp x30, x8, [sp], #0x10
br x9
#else
#error No forwarding assembly definition for this arch
#endif
.set i, i + 1
.endr
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