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rt: Implement __morestack for 64-bit mac. Doesn't unwind yet

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This commit is contained in:
Brian Anderson 2011-12-01 18:33:06 -08:00
parent 8bf3d85b9d
commit 3e5b314c0b
1 changed files with 5 additions and 10 deletions
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15
src/rt/arch/x86_64/morestack.S
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@ -48,16 +48,12 @@
.type MORESTACK,@function
#endif
#if defined(__linux__)
#if defined(__linux__) || defined(__APPLE__)
MORESTACK:
.cfi_startproc
# Set up a normal backtrace
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset %rbp, -16
movq %rsp, %rbp
.cfi_def_cfa_register %rbp
// FIXME: libgcc also saves rax. not sure if we need to
@ -79,9 +75,9 @@ MORESTACK:
pushq %rcx // Address of stack arguments
pushq %r10 // The amount of stack needed
leaq UPCALL_NEW_STACK@PLT(%rip), %rsi
movq UPCALL_NEW_STACK@GOTPCREL(%rip), %rsi
movq %rsp, %rdi
call UPCALL_CALL_C@PLT
call UPCALL_CALL_C@GOTPCREL
// Pop the new_stack_args struct
addq $24, %rsp
@ -106,15 +102,14 @@ MORESTACK:
// Align the stack again
pushq $0
leaq UPCALL_DEL_STACK@PLT(%rip), %rsi
movq UPCALL_DEL_STACK@GOTPCREL(%rip), %rsi
movq $0, %rdi
call UPCALL_CALL_C@PLT
call UPCALL_CALL_C@GOTPCREL
addq $8, %rsp
popq %rbp
ret
.cfi_endproc
#else
MORESTACK:
ret