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author | samuel <samuel@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-11-20 10:13:59 +0000 |
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committer | samuel <samuel@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-11-20 10:13:59 +0000 |
commit | 3e9beaf72b6b3a74acf764df4d801bb6371b6bca (patch) | |
tree | 7291a3fa8d1015a6141ec2d5dea530351c919edb | |
parent | ff86d1b61b62c710790cfca225303327745923f6 (diff) | |
download | ruby-3e9beaf72b6b3a74acf764df4d801bb6371b6bca.tar.gz |
Initial effort to support 32-bit Linux.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65847 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
-rw-r--r-- | configure.ac | 5 | ||||
-rw-r--r-- | coroutine/x86/Context.h | 61 | ||||
-rw-r--r-- | coroutine/x86/Context.s | 39 |
3 files changed, 105 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 1f2d7d7ad9..a53e3e7ad5 100644 --- a/configure.ac +++ b/configure.ac @@ -2332,6 +2332,11 @@ AS_CASE(["$target_cpu-$target_os"], AC_DEFINE(FIBER_USE_COROUTINE, "coroutine/amd64/Context.h") AC_LIBOBJ([coroutine/amd64/Context]) ], + [*86-*], [ + AC_MSG_RESULT(x86) + AC_DEFINE(FIBER_USE_COROUTINE, "coroutine/x86/Context.h") + AC_LIBOBJ([coroutine/x86/Context]) + ] [*], [ AC_MSG_RESULT(no) ] diff --git a/coroutine/x86/Context.h b/coroutine/x86/Context.h new file mode 100644 index 0000000000..bbc60e4ff9 --- /dev/null +++ b/coroutine/x86/Context.h @@ -0,0 +1,61 @@ +// +// File file is part of the "Coroutine" project and released under the MIT License. +// +// Created by Samuel Williams on 3/11/2018. +// Copyright, 2018, by Samuel Williams. All rights reserved. +// + +#pragma once + +#include <assert.h> +#include <string.h> + +#if __cplusplus +extern "C" { +#endif + +#define COROUTINE void __attribute__((fastcall)) + +const size_t COROUTINE_REGISTERS = 4; + +// The fiber context (stack pointer). +typedef struct +{ + void **stack_pointer; +} coroutine_context; + +// The initialization function. +typedef void(* coroutine_start)(coroutine_context *from, coroutine_context *self) __attribute__((fastcall)); + +void coroutine_initialize( + coroutine_context *context, + coroutine_start start, + void *stack_pointer, + size_t stack_size +) { + /* Force 16-byte alignment */ + context->stack_pointer = (void**)((uintptr_t)stack_pointer & ~0xF); + + if (!start) { + assert(!context->stack_pointer); + /* We are main coroutine for this thread */ + return; + } + + *--context->stack_pointer = NULL; + *--context->stack_pointer = (void*)start; + + context->stack_pointer -= COROUTINE_REGISTERS; + memset(context->stack_pointer, 0, sizeof(void*) * COROUTINE_REGISTERS); +} + +coroutine_context * coroutine_transfer(coroutine_context * current, coroutine_context * target) __attribute__((fastcall)); + +inline void coroutine_destroy(coroutine_context * context) +{ + context->stack_pointer = NULL; +} + +#if __cplusplus +} +#endif diff --git a/coroutine/x86/Context.s b/coroutine/x86/Context.s new file mode 100644 index 0000000000..9b319cd8df --- /dev/null +++ b/coroutine/x86/Context.s @@ -0,0 +1,39 @@ +## +## File file is part of the "Coroutine" project and released under the MIT License. +## +## Created by Samuel Williams on 3/11/2018. +## Copyright, 2018, by Samuel Williams. All rights reserved. +## + +.text + +.globl coroutine_transfer +coroutine_transfer: + +# For older linkers +.globl _coroutine_transfer +_coroutine_transfer: + + # Save caller registers + pushl %ebp + pushl %ebx + pushl %edi + pushl %esi + + # Save caller stack pointer + movl %esp, (%ecx) + + # Restore callee stack pointer + movl (%edx), %esp + + # Restore callee stack + popl %esi + popl %edi + popl %ebx + popl %ebp + + # Save the first argument as the return value + movl %ecx, %eax + + # Jump to the address on the stack + ret |