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libthread: use libc functions in ucontext for macOS (#417)

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Xiao-Yong 2020-06-15 22:18:03 -05:00 committed by GitHub
parent c3d31baca0
commit 329831171d
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3 changed files with 3 additions and 81 deletions
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44
src/libthread/Darwin-x86_64-asm.s
View file

@ -1,44 +0,0 @@
.text
.align 8
.globl _libthread_getmcontext
_libthread_getmcontext:
movq $1, 0*8(%rdi) // rax
movq %rbx, 1*8(%rdi)
movq %rcx, 2*8(%rdi)
movq %rdx, 3*8(%rdi)
movq %rsi, 4*8(%rdi)
movq %rdi, 5*8(%rdi)
movq %rbp, 6*8(%rdi)
movq %rsp, 7*8(%rdi)
movq %r8, 8*8(%rdi)
movq %r9, 9*8(%rdi)
movq %r10, 10*8(%rdi)
movq %r11, 11*8(%rdi)
movq %r12, 12*8(%rdi)
movq %r13, 13*8(%rdi)
movq %r14, 14*8(%rdi)
movq %r15, 15*8(%rdi)
movq $0, %rax
ret
.globl _libthread_setmcontext
_libthread_setmcontext:
movq 0*8(%rdi), %rax
movq 1*8(%rdi), %rbx
movq 2*8(%rdi), %rcx
movq 3*8(%rdi), %rdx
movq 4*8(%rdi), %rsi
// %rdi later
movq 6*8(%rdi), %rbp
movq 7*8(%rdi), %rsp
movq 8*8(%rdi), %r8
movq 9*8(%rdi), %r9
movq 10*8(%rdi), %r10
movq 11*8(%rdi), %r11
movq 12*8(%rdi), %r12
movq 13*8(%rdi), %r13
movq 14*8(%rdi), %r14
movq 15*8(%rdi), %r15
movq 5*8(%rdi), %rdi
ret

4
src/libthread/sysofiles.sh
View file

@ -15,14 +15,14 @@ esac
# Various libc don't supply swapcontext, makecontext, so we do.
case "$SYSNAME-$OBJTYPE" in
Darwin-x86_64 | Linux-arm | Linux-sparc64 | NetBSD-arm | OpenBSD-386 | OpenBSD-power | OpenBSD-x86_64)
Linux-arm | Linux-sparc64 | NetBSD-arm | OpenBSD-386 | OpenBSD-power | OpenBSD-x86_64)
echo $OBJTYPE-ucontext.o
;;
esac
# A few libc don't supply setcontext, getcontext, so we do.
case "$SYSNAME-$OBJTYPE" in
Darwin-x86_64 | Linux-arm | Linux-sparc64 | OpenBSD-386 | OpenBSD-power | OpenBSD-x86_64)
Linux-arm | Linux-sparc64 | OpenBSD-386 | OpenBSD-power | OpenBSD-x86_64)
echo $SYSNAME-$OBJTYPE-asm.o
;;
esac

36
src/libthread/threadimpl.h
View file

@ -7,7 +7,7 @@
#include <signal.h>
#if !defined(__OpenBSD__)
# if defined(__APPLE__)
# define _XOPEN_SOURCE /* for Snow Leopard */
# define _XOPEN_SOURCE /* for Snow Leopard */
# endif
# include <ucontext.h>
#endif
@ -15,31 +15,6 @@
#include "libc.h"
#include "thread.h"
#if defined(__APPLE__)
/*
* OS X before 10.5 (Leopard) does not provide
* swapcontext nor makecontext, so we have to use our own.
* In theory, Leopard does provide them, but when we use
* them, they seg fault. Maybe we're using them wrong.
* So just use our own versions, even on Leopard.
*/
# define mcontext libthread_mcontext
# define mcontext_t libthread_mcontext_t
# define ucontext libthread_ucontext
# define ucontext_t libthread_ucontext_t
# define swapcontext libthread_swapcontext
# define makecontext libthread_makecontext
# if defined(__i386__)
# include "386-ucontext.h"
# elif defined(__x86_64__)
# include "x86_64-ucontext.h"
# elif defined(__ppc__) || defined(__power__)
# include "power-ucontext.h"
# else
# error "unknown architecture"
# endif
#endif
#if defined(__OpenBSD__)
# define mcontext libthread_mcontext
# define mcontext_t libthread_mcontext_t
@ -82,15 +57,6 @@ enum
struct Context
{
ucontext_t uc;
#ifdef __APPLE__
/*
* On Snow Leopard, etc., the context routines exist,
* so we use them, but apparently they write past the
* end of the ucontext_t. Sigh. We put some extra
* scratch space here for them.
*/
uchar buf[1024];
#endif
};
struct Execjob