blob: 79f26ff59a9a36e7af70819e8713f40cdb5bb0e1 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
#ifdef __ELF__
.section .text.tinygo_scanCurrentStack
.global tinygo_scanCurrentStack
tinygo_scanCurrentStack:
#else // Darwin
.global _tinygo_scanCurrentStack
_tinygo_scanCurrentStack:
#endif
// Save callee-saved registers.
pushq %rbx
pushq %rbp
pushq %r12
pushq %r13
pushq %r14
pushq %r15
// Scan the stack.
subq $8, %rsp // adjust the stack before the call to maintain 16-byte alignment
movq %rsp, %rdi
#ifdef __ELF__
callq tinygo_scanstack
#else
callq _tinygo_scanstack // Darwin
#endif
// Restore the stack pointer. Registers do not need to be restored as they
// were only pushed to be discoverable by the GC.
addq $56, %rsp
retq
#ifdef __ELF__
.section .text.tinygo_longjmp
.global tinygo_longjmp
tinygo_longjmp:
#else // Darwin
.global _tinygo_longjmp
_tinygo_longjmp:
#endif
// Note: the code we jump to assumes rax is set to a non-zero value if we
// jump from here, so we use rax as the temporary value for jumpPC.
movq 0(%rdi), %rsp // jumpSP
movq 8(%rdi), %rax // jumpPC
jmpq *%rax
#ifdef __MACH__ // Darwin
// allow these symbols to stripped as dead code
.subsections_via_symbols
#endif
|
