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runtime: support panic recovery on Xtensa

Browse Source 
Use picolibc setjmp and longjmp to save and restore the complete
Xtensa register-window state at TinyGo panic checkpoints.

Provide the target configuration and window spill helper required by
picolibc. Increment its cache version because Xtensa archives now
include another source file.
This commit is contained in:
Jake Bailey
2026-09-04 09:46:55 -07:00
committed by Ron Evans
parent a96cc30257
commit b8b831cf5c
8 changed files with 102 additions and 22 deletions
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make/release.mk
+13 -9
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@@ -15,12 +15,14 @@ build/release: tinygo gen-device $(if $(filter 1,$(USE_SYSTEM_BINARYEN)),,binary
@mkdir -p build/release/tinygo/lib/musl/src
@mkdir -p build/release/tinygo/lib/nrfx
@mkdir -p build/release/tinygo/lib/picolibc/libc
@mkdir -p build/release/tinygo/lib/picolibc/libc/machine
@mkdir -p build/release/tinygo/lib/picolibc/libm
@mkdir -p build/release/tinygo/lib/wasi-libc/dlmalloc
@mkdir -p build/release/tinygo/lib/wasi-libc/libc-bottom-half
@mkdir -p build/release/tinygo/lib/wasi-libc/libc-top-half/musl/arch
@mkdir -p build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
@mkdir -p build/release/tinygo/lib/wasi-cli/
@mkdir -p build/release/tinygo/lib/xtensa
@echo copying source files
@cp -p build/tinygo$(EXE) build/release/tinygo/bin
ifneq ($(USE_SYSTEM_BINARYEN),1)
@@ -80,15 +82,16 @@ endif
@cp -rp lib/mingw-w64/mingw-w64-headers/defaults/include build/release/tinygo/lib/mingw-w64/mingw-w64-headers/defaults
@cp -rp lib/mingw-w64/mingw-w64-headers/include build/release/tinygo/lib/mingw-w64/mingw-w64-headers
@cp -rp lib/nrfx/* build/release/tinygo/lib/nrfx
@cp -rp lib/picolibc/libc/ctype build/release/tinygo/lib/picolibc/libc
@cp -rp lib/picolibc/libc/include build/release/tinygo/lib/picolibc/libc
@cp -rp lib/picolibc/libc/locale build/release/tinygo/lib/picolibc/libc
@cp -rp lib/picolibc/libc/stdlib build/release/tinygo/lib/picolibc/libc
@cp -rp lib/picolibc/libc/string build/release/tinygo/lib/picolibc/libc
@cp -rp lib/picolibc/libc/stdio build/release/tinygo/lib/picolibc/libc
@cp -rp lib/picolibc/libm/common build/release/tinygo/lib/picolibc/libm
@cp -rp lib/picolibc/libm/math build/release/tinygo/lib/picolibc/libm
@cp -rp lib/picolibc-stdio.c build/release/tinygo/lib
@cp -rp lib/picolibc/libc/ctype build/release/tinygo/lib/picolibc/libc
@cp -rp lib/picolibc/libc/include build/release/tinygo/lib/picolibc/libc
@cp -rp lib/picolibc/libc/locale build/release/tinygo/lib/picolibc/libc
@cp -rp lib/picolibc/libc/machine/xtensa build/release/tinygo/lib/picolibc/libc/machine
@cp -rp lib/picolibc/libc/stdlib build/release/tinygo/lib/picolibc/libc
@cp -rp lib/picolibc/libc/string build/release/tinygo/lib/picolibc/libc
@cp -rp lib/picolibc/libc/stdio build/release/tinygo/lib/picolibc/libc
@cp -rp lib/picolibc/libm/common build/release/tinygo/lib/picolibc/libm
@cp -rp lib/picolibc/libm/math build/release/tinygo/lib/picolibc/libm
@cp -rp lib/picolibc-stdio.c build/release/tinygo/lib
@cp -rp lib/wasi-libc/dlmalloc/src build/release/tinygo/lib/wasi-libc/dlmalloc
@cp -rp lib/wasi-libc/libc-bottom-half/cloudlibc build/release/tinygo/lib/wasi-libc/libc-bottom-half
@cp -rp lib/wasi-libc/libc-bottom-half/headers build/release/tinygo/lib/wasi-libc/libc-bottom-half
@@ -121,6 +124,7 @@ endif
@cp -rp lib/wasi-libc/libc-top-half/musl/src/unistd build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
@cp -rp lib/wasi-libc/libc-top-half/sources build/release/tinygo/lib/wasi-libc/libc-top-half
@cp -rp lib/wasi-cli/wit build/release/tinygo/lib/wasi-cli/wit
@cp -rp lib/xtensa/include build/release/tinygo/lib/xtensa
@cp -rp ${LLVM_PROJECTDIR}/compiler-rt/lib/builtins build/release/tinygo/lib/compiler-rt-builtins
@cp -rp ${LLVM_PROJECTDIR}/compiler-rt/LICENSE.TXT build/release/tinygo/lib/compiler-rt-builtins
@cp -rp src build/release/tinygo/src