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| author | Yuta Saito <kateinoigakukun@gmail.com> | 2022-01-15 23:10:48 +0900 |
|---|---|---|
| committer | Yuta Saito <kateinoigakukun@gmail.com> | 2022-01-19 11:19:06 +0900 |
| commit | 65f95f26ff0e7b4be4704fedc52344a26d22a4e2 (patch) | |
| tree | e4bd17869d8dd479855592f3a571aacae19e964c /wasm/setjmp_core.S | |
| parent | e41b121e94ccce9877824e55f865885bbabe40c3 (diff) | |
| download | ruby-65f95f26ff0e7b4be4704fedc52344a26d22a4e2.tar.gz | |
[wasm] add asyncify based setjmp, fiber, register scan emulation
configure.ac: setup build tools and register objects
main.c: wrap main with rb_wasm_rt_start to handle asyncify unwinds
tool/m4/ruby_wasm_tools.m4: setup default command based on WASI_SDK_PATH
environment variable. checks wasm-opt which is used for asyncify.
tool/wasm-clangw wasm/wasm-opt: a clang wrapper which replaces real
wasm-opt with do-nothing wasm-opt to avoid misoptimization before
asyncify. asyncify is performed at POSTLINK, but clang linker driver
tries to run optimization by wasm-opt unconditionally. inlining pass
at wasm level breaks asyncify's assumption, so should not optimize
before POSTLIK.
wasm/GNUmakefile.in: wasm specific rules to compile objects
Diffstat (limited to 'wasm/setjmp_core.S')
| -rw-r--r-- | wasm/setjmp_core.S | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/wasm/setjmp_core.S b/wasm/setjmp_core.S new file mode 100644 index 0000000000..4a7194056e --- /dev/null +++ b/wasm/setjmp_core.S @@ -0,0 +1,27 @@ + # extern int _rb_wasm_setjmp_internal(rb_wasm_jmp_buf *env); + .functype _rb_wasm_setjmp_internal (i32) -> (i32) + # extern int __stack_pointer; + .globaltype __stack_pointer, i32 + + # A wrapper of _rb_wasm_setjmp_internal to save and restore stack pointer + # This cannot be implemented in C because there is no way to manipulate stack pointer + # without C-epilogue. + + # extern int _rb_wasm_setjmp(rb_wasm_jmp_buf *env); + .section .text._rb_wasm_setjmp,"",@ + .globl _rb_wasm_setjmp + .type _rb_wasm_setjmp,@function +_rb_wasm_setjmp: + .functype _rb_wasm_setjmp (i32) -> (i32) + .local i32, i32 + # save sp (this local is stored in asyncify stack and restored when rewinding) + global.get __stack_pointer + local.set 1 + + local.get 0 + call _rb_wasm_setjmp_internal + + # restore sp + local.get 1 + global.set __stack_pointer + end_function |