Differences From Artifact [6c6e2ed7b7]:
- File src/forwarding/forwarding-amd64-elf.S — part of check-in [3695e89467] at 2013-12-25 00:01:08 on branch trunk — Make section .ctors "aw". (user: js, size: 3755) [annotate] [blame] [check-ins using]
To Artifact [55f7a74c19]:
- File
src/forwarding/forwarding-amd64-elf.S
— part of check-in
[0c332aa2d2]
at
2013-12-27 02:07:14
on branch trunk
— Rework forwarding API and ABI.
It matches the Apple API and ABI now and the forwarding handler itself
determines whether it should forward or not.This moves handling of +[resolve{Class,Instance}Method:] to the runtime
and allows adding new kinds of forwarding without changing the runtime.Also fixes a potential stack problem in the forwarding for MIPS. (user: js, size: 4529) [annotate] [blame] [check-ins using]
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36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 | movdqa %xmm2, -0x70(%rbp) movdqa %xmm3, -0x80(%rbp) movdqa %xmm4, -0x90(%rbp) movdqa %xmm5, -0xA0(%rbp) movdqa %xmm6, -0xB0(%rbp) movdqa %xmm7, -0xC0(%rbp) leaq sel_forwardingTargetForSelector_(%rip), %rsi call objc_msg_lookup@PLT movq -0x10(%rbp), %rdi leaq sel_forwardingTargetForSelector_(%rip), %rsi movq -0x18(%rbp), %rdx call *%rax movq %rax, -0x10(%rbp) movq %rax, %rdi movq -0x18(%rbp), %rsi call objc_msg_lookup@PLT movq %rax, %r11 | > > > > > > > > > > > > > > > > > | 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 | movdqa %xmm2, -0x70(%rbp) movdqa %xmm3, -0x80(%rbp) movdqa %xmm4, -0x90(%rbp) movdqa %xmm5, -0xA0(%rbp) movdqa %xmm6, -0xB0(%rbp) movdqa %xmm7, -0xC0(%rbp) call object_getClass@PLT movq %rax, %rdi leaq sel_forwardingTargetForSelector_(%rip), %rsi call class_respondsToSelector@PLT testq %rax, %rax jz fail movq -0x10(%rbp), %rdi leaq sel_forwardingTargetForSelector_(%rip), %rsi call objc_msg_lookup@PLT movq -0x10(%rbp), %rdi leaq sel_forwardingTargetForSelector_(%rip), %rsi movq -0x18(%rbp), %rdx call *%rax testq %rax, %rax jz fail cmpq -0x10(%rbp), %rax je fail movq %rax, -0x10(%rbp) movq %rax, %rdi movq -0x18(%rbp), %rsi call objc_msg_lookup@PLT movq %rax, %r11 |
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70 71 72 73 74 75 76 77 78 79 80 81 82 83 | movq -0x10(%rbp), %rdi movq -0x8(%rbp), %rax movq %rbp, %rsp popq %rbp jmpq *%r11 .type of_forward, %function .size of_forward, .-of_forward of_forward_stret: pushq %rbp movq %rsp, %rbp | > > > > > > > > > | 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 | movq -0x10(%rbp), %rdi movq -0x8(%rbp), %rax movq %rbp, %rsp popq %rbp jmpq *%r11 fail: movq -0x10(%rbp), %rdi movq -0x18(%rbp), %rsi movq %rbp, %rsp popq %rbp jmp of_method_not_found@PLT .type of_forward, %function .size of_forward, .-of_forward of_forward_stret: pushq %rbp movq %rsp, %rbp |
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96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 | movdqa %xmm3, -0x80(%rbp) movdqa %xmm4, -0x90(%rbp) movdqa %xmm5, -0xA0(%rbp) movdqa %xmm6, -0xB0(%rbp) movdqa %xmm7, -0xC0(%rbp) movq %rsi, %rdi leaq sel_forwardingTargetForSelector_(%rip), %rsi call objc_msg_lookup@PLT movq -0x18(%rbp), %rdi leaq sel_forwardingTargetForSelector_(%rip), %rsi movq -0x20(%rbp), %rdx call *%rax movq %rax, -0x18(%rbp) movq %rax, %rdi movq -0x20(%rbp), %rsi call objc_msg_lookup_stret@PLT movq %rax, %r11 | > > > > > > > > > > > > > > > > > | 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 | movdqa %xmm3, -0x80(%rbp) movdqa %xmm4, -0x90(%rbp) movdqa %xmm5, -0xA0(%rbp) movdqa %xmm6, -0xB0(%rbp) movdqa %xmm7, -0xC0(%rbp) movq %rsi, %rdi call object_getClass@PLT movq %rax, %rdi leaq sel_forwardingTargetForSelector_(%rip), %rsi call class_respondsToSelector@PLT testq %rax, %rax jz fail_stret movq -0x18(%rbp), %rdi leaq sel_forwardingTargetForSelector_(%rip), %rsi call objc_msg_lookup@PLT movq -0x18(%rbp), %rdi leaq sel_forwardingTargetForSelector_(%rip), %rsi movq -0x20(%rbp), %rdx call *%rax testq %rax, %rax jz fail_stret cmpq -0x18(%rbp), %rax je fail_stret movq %rax, -0x18(%rbp) movq %rax, %rdi movq -0x20(%rbp), %rsi call objc_msg_lookup_stret@PLT movq %rax, %r11 |
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130 131 132 133 134 135 136 137 138 139 140 141 142 143 | movq -0x10(%rbp), %rdi movq -0x8(%rbp), %rax movq %rbp, %rsp popq %rbp jmpq *%r11 .type of_forward_stret, %function .size of_forward_stret, .-of_forward_stret init: leaq module(%rip), %rdi jmp __objc_exec_class@PLT | > > > > > > > > > > | 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 | movq -0x10(%rbp), %rdi movq -0x8(%rbp), %rax movq %rbp, %rsp popq %rbp jmpq *%r11 fail_stret: movq -0x10(%rbp), %rdi movq -0x18(%rbp), %rsi movq -0x20(%rbp), %rdx movq %rbp, %rsp popq %rbp jmp of_method_not_found_stret@PLT .type of_forward_stret, %function .size of_forward_stret, .-of_forward_stret init: leaq module(%rip), %rdi jmp __objc_exec_class@PLT |
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