bab0c79c31
This commit adds a few odds and ends required to build wasmtime on ARM64 with the new backend. In particular, it adds: - Support for the `Arm64Call` relocation type. - Support for fetching the trap PC when a signal is received. - A hook for `SIGTRAP`, which is sent by the `brk` opcode (in contrast to x86's `SIGILL`). With the patch sequence up to and including this patch applied, `wasmtime` can now compile and successfully execute code on arm64. Not all tests pass yet, but basic Wasm/WASI tests work correctly.
38 lines
649 B
C
38 lines
649 B
C
#include <setjmp.h>
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int RegisterSetjmp(
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void **buf_storage,
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void (*body)(void*),
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void *payload) {
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jmp_buf buf;
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if (setjmp(buf) != 0) {
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return 0;
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}
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*buf_storage = &buf;
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body(payload);
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return 1;
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}
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void Unwind(void *JmpBuf) {
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jmp_buf *buf = (jmp_buf*) JmpBuf;
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longjmp(*buf, 1);
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}
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#ifdef __APPLE__
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#include <sys/ucontext.h>
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void* GetPcFromUContext(ucontext_t *cx) {
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return (void*) cx->uc_mcontext->__ss.__rip;
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}
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#endif
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#if defined(__linux__) && defined(__aarch64__)
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#include <sys/ucontext.h>
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void* GetPcFromUContext(ucontext_t *cx) {
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return (void*) cx->uc_mcontext.pc;
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}
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#endif // __linux__ && __aarch64__
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