Add i368-elf-gcc v5.4 crosscompiler

Add gitea workflow
use pool memory allocator for wasm runtime
2026-02-23 19:58:18 +01:00 · 2026-02-09 13:11:55 +01:00 · 2026-02-05 23:45:13 +01:00 · 2026-02-05 23:45:03 +01:00 · 2026-02-05 17:55:37 +01:00 · 2026-02-05 17:55:22 +01:00
13 changed files with 397 additions and 190 deletions
--- a/.gitea/workflows/wasm-docker.yaml
+++ b/.gitea/workflows/wasm-docker.yaml
@ -0,0 +1,26 @@
+name: Build WASM Base Docker Image
+
+on:
+  push:
+    branches: [disabled]
+    # branches: [main]
+    # paths:
+    #   - ".gitea/workflows/wasm-docker.yaml"
+    #   - "wasm-base.dockerfile"
+
+jobs:
+  wasm-docker:
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Login to container registry
+        uses: docker/login-action@v3
+        with:
+          registry: gitea.vps.chriphost.de
+          username: ${{ secrets.CONTAINER_REGISTRY_USER }}
+          password: ${{ secrets.CONTAINER_REGISTRY_TOKEN }}
+      - name: Build WASM Base Docker Image
+        run: docker build --file wasm-base.dockerfile --tag gitea.vps.chriphost.de/christoph/wasm-base:latest .
+      - name: Push WASM Base Docker Image
+        run: docker push gitea.vps.chriphost.de/christoph/wasm-base:latest
--- a/12
+++ b/12
@ -1,8 +1,14 @@
 docker:
-	docker build -t wasm-base -f wasm-base.dockerfile . --build-arg CACHE_DATE="$(shell date)"
+	docker build -t gitea.vps.chriphost.de/christoph/wasm-base:latest -f wasm-base.dockerfile . --build-arg CACHE_DATE="$(shell date)"

 run:
-	docker run --rm -it wasm-base:latest /usr/bin/fish
+	docker run --rm -it gitea.vps.chriphost.de/christoph/wasm-base:latest /usr/bin/fish

 run-external:
-	docker run --rm -it -v "./examples:/home/ubuntu/examples" wasm-base:latest /usr/bin/fish
+	docker run --rm -it -v "./examples:/home/ubuntu/examples" gitea.vps.chriphost.de/christoph/wasm-base:latest /usr/bin/fish
+
+bochs:
+	bochs -f ./examples/arch/bochs/bochsrc-docker.txt -q
+
+bochs-host:
+	nix shell nixpkgs#bochs --command sh -c "bochs -f ./examples/arch/bochs/bochsrc-host.txt -q"
--- a/examples/Makefile_EmbedWASM
+++ b/examples/Makefile_EmbedWASM
@ -1,86 +0,0 @@
-# This makefile embeds an application compiled to WASM into a native C program.
-# The WASM module will be loaded by the WASM runtime.
-
-# Paths
-WAMR_ROOT     := /opt/wamr
-WAMRC         := /opt/wamr-wamrc/wamrc
-IWASM         := /opt/wamr-iwasm/iwasm
-WAMRC_LIB     := /opt/wamr-libvmlib
-IWASM_LIB     := /opt/wamr-libiwasm
-
-WASI_ROOT     := /opt/wasi-sdk
-WASI_CC       := $(WASI_ROOT)/bin/clang
-WASI_CFLAGS   := --target=wasm32-wasi \
-		 --sysroot=$(WASI_ROOT)/share/wasi-sysroot \
-		 -O0 -g -Wall
-
-# Embedding
-EMBED_CC      := gcc
-EMBED_INCL    := -I$(WAMR_ROOT)/core/iwasm/include \
-                 -I$(WAMR_ROOT)/core/iwasm/common \
-		 -I$(WAMR_ROOT)/core/shared/platform/linux \
-		 -I$(WAMR_ROOT)/core/shared/utils \
-		 -I$(WAMR_ROOT)/core/shared/utils/uncommon
-EMBED_SOURCES := $(WAMR_ROOT)/core/shared/utils/uncommon/bh_read_file.c # Not used when reading from buffer
-EMBED_CFLAGS  := -O0 -g -Wall $(EMBED_INCL)
-AOT_LDFLAGS   := -Wl,-rpath,$(WAMRC_LIB)
-AOT_LDLIBS    := -L$(WAMRC_LIB) -lvmlib -lm
-INTER_LDFLAGS := -Wl,-rpath,$(IWASM_LIB)
-INTER_LDLIBS  := -L$(IWASM_LIB) -liwasm -lm
-XXD           := busybox xxd
-
-# Files
-SRCS          := $(wildcard *.c)
-WASMS         := $(SRCS:.c=.wasm)
-CWASMS        := $(SRCS:.c=_wasm.c)
-AOTS          := $(SRCS:.c=.aot)
-OBJS          := $(SRCS:.c=.o)
-DEPS          := $(SRCS:.c=.d)
-HOSTS         := $(SRCS:.c=_host.elf)
-
-
-.PHONY: all build-wasms build-aots build-cwasms build-hosts clean
-
-all: build-wasms build-aots build-cwasms build-hosts
-
-# Compile to wasm bytecode using wasi-sdk
-build-wasms: $(WASMS)
-
-%.wasm: %.c
-	$(WASI_CC) $(WASI_CFLAGS) $< -o $@
-
-# Compile ahead-of-time module using wamrc
-build-aots: $(AOTS)
-
-%.aot: %.wasm
-	$(WAMRC) -o $@ $<
-
-# Convert the .aot files to C-style arrays (to embed them into the resulting host binary)
-build-cwasms: $(CWASMS)
-
-%_wasm.c: %.aot
-	$(XXD) -i $< > $@
-
-# Compile the host that will load and run the compiled wasm module
-# The compiled wasm module is embedded as C-style array
-build-hosts: $(HOSTS)
-
-# The C-style array is called %_aot, e.g. test_aot
-# We have to modify the host to refer to that with the correct name
-%_host.elf: %_wasm.c
-	cp embed/host.c embed/$*_host.c
-	sed -i \
-	    -e "s@__WASM_ARRAY_FILE__@../$*_wasm.c@g" \
-            -e "s@__WASM_ARRAY__@$*_aot@g" \
-            -e "s@__WASM_ARRAY_LEN__@$*_aot_len@g" \
-            embed/$*_host.c
-	$(EMBED_CC) $(EMBED_CFLAGS) embed/$*_host.c -o $@ $(INTER_LDFLAGS) $(INTER_LDLIBS)
-
-clean:
-	rm -f *.wasm
-	rm -f *.aot
-	rm -f *_wasm.c
-	rm -f *.d
-	rm -f *.o
-	rm -f embed/*_host.c
-	rm -f *_host.elf
--- a/examples/arch/bochs.mk
+++ b/examples/arch/bochs.mk
@ -1,36 +1,51 @@
 # C -> WASM
 WASI_ROOT := /opt/wasi-sdk
 WASI_CC := ${WASI_ROOT}/bin/clang
-WASI_CFLAGS   := --target=wasm32 \
+WASI_CFLAGS := \
+	--target=wasm32 \
 	--sysroot=${WASI_ROOT}/share/wasi-sysroot \
 	-z stack-size=4096 \
+	-O0 \
 	-nostdlib \
-				 -O0 -g -Wall \
 	-Wl,--no-entry \
-				 -Wl,--initial-memory=65536 \
 	-Wl,--export-all \
+	-Wl,--no-gc-sections \
+	-Wl,--initial-memory=65536 \
 	-Wl,--export=__heap_base \
 	-Wl,--export=__data_end

 # WASM -> Baremetal
 WAMR := /opt/wamr
 IWASM_LIB := /opt/wamr-libiwasm
-CC            := gcc
-CFLAGS        := -I. -include arch/${ARCH}/lib.c -O0 -g -m32 -fomit-frame-pointer
-LDFLAGS       := -Wl,-T linker.ld $^ -Wl,--build-id=none -static -nostdlib -m32 \
-				 -Wl,-rpath,${IWASM_LIB} -L${IWASM_LIB} -liwasm
-INCL          := -I${WAMR}/core/iwasm/include \
-				 -I${WAMR}/core/iwasm/common \
-				 -I${WAMR}/core/shared/platform/include \
-				 -I${WAMR}/core/shared/platform/linux \
-				 -I${WAMR}/core/shared/mem-alloc \
+CC := /opt/crosscompiler/bin/i686-elf-gcc
+# NOTE: When compiling I get "error: bp cannot be used in ‘asm’ here"
+#       I could remove "ebp" from the clobber list (ARCH_ASM_CLOBBER_ALL) or
+#       use the -fomit-frame-pointer flag to tell gcc it shouldn't rely on ebp for enter/leave...
+CFLAGS := \
+	-I. \
+	-O0 \
+	-m32 \
+	-ffunction-sections \
+	-fomit-frame-pointer
+LDFLAGS = \
+	-Wl,-T linker.ld \
+	$^ \
+	-Wl,--build-id=none \
+	-static \
+	-nostdlib \
+	-m32 \
+	-Wl,-rpath,${IWASM_LIB} \
+	-L${IWASM_LIB} \
+	-liwasm \
+	-lc \
+	-lgcc
+INCL := \
+	-I${WAMR}/core/iwasm/include \
 	-I${WAMR}/core/shared/utils \
-				 -I${WAMR}/core/shared/utils/uncommon
+	-I${WAMR}/core/shared/platform/baremetal \
+	-I/opt/crosscompiler/i686-elf/include
 WAMRC := /opt/wamr-wamrc/wamrc
-WAMRCFLAGS    := --target=i386 --format=object
 XXD := busybox xxd
-WASM2C        := wasm2c
-

 ################################################################
 # C -> WASM
@ -38,19 +53,17 @@ ${BUILD_DIR}/%/module.wasm: %.c
 	mkdir -p $(shell dirname $@)
 	${WASI_CC} ${WASI_CFLAGS} $< -o $@

-
 ################################################################
 # WASM -> Native Object File
 # ${BUILD_DIR}/%/system.o: ${BUILD_DIR}/%/module.wasm
-# 	${WAMRC} ${WAMRCFLAGS} -o ${BUILD_DIR}/$*/system.o ${BUILD_DIR}/$*/module.wasm
+# 	${WAMRC} --target=i386 --format=object -o ${BUILD_DIR}/$*/system.o ${BUILD_DIR}/$*/module.wasm
 #
 # ${BUILD_DIR}/startup.o: arch/bochs/startup.s
-# 	${CC} $< ${CFLAGS} -c -ffunction-sections -o $@
+# 	${CC} $< ${CFLAGS} -c -o $@
 #
 # ${BUILD_DIR}/%/system.elf: ${BUILD_DIR}/%/system.o ${BUILD_DIR}/startup.o
 # 	${CC} ${LDFLAGS} -o $@

-
 ################################################################
 # WASM -> AOT -> Loaded by Runtime
 ${BUILD_DIR}/%/module.aot: ${BUILD_DIR}/%/module.wasm
@ -66,12 +79,15 @@ ${BUILD_DIR}/%/system.o: ${BUILD_DIR}/%/module_wasm.c
 	    -e "s/__WASM_ARRAY__/build_bochs_$*_module_aot/g" \
 	    -e "s/__WASM_ARRAY_LEN__/build_bochs_$*_module_aot_len/g" \
 	    ${BUILD_DIR}/$*/module_host.c
-	${CC} ${CFLAGS} ${INCL} -c -ffunction-sections ${BUILD_DIR}/$*/module_host.c -o $@
+	${CC} ${CFLAGS} ${INCL} -c ${BUILD_DIR}/$*/module_host.c -o $@

 ${BUILD_DIR}/startup.o: arch/bochs/startup.s
-	${CC} $< ${CFLAGS} -c -ffunction-sections -o $@
+	${CC} $< ${CFLAGS} -c -o $@

-${BUILD_DIR}/%/system.elf: ${BUILD_DIR}/%/system.o ${BUILD_DIR}/startup.o
+${BUILD_DIR}/syscalls.o: syscalls.c
+	${CC} $< ${CFLAGS} -c -o $@
+
+${BUILD_DIR}/%/system.elf: ${BUILD_DIR}/%/system.o ${BUILD_DIR}/syscalls.o ${BUILD_DIR}/startup.o
 	${CC} ${LDFLAGS} -o $@

 ################################################################
@ -83,7 +99,6 @@ ${BUILD_DIR}/%/system.iso: ${BUILD_DIR}/%/system.elf
 	cp $< $(shell dirname $<)/grub/boot/system.elf
 	grub-mkrescue -o $@ $(shell dirname $<)/grub

-
 BOCHS_RUNNER_ARGS = \
 	-V arch/bochs/vgabios.bin \
 	-b arch/bochs/BIOS-bochs-latest \
@ -91,8 +106,8 @@ BOCHS_RUNNER_ARGS = \
 ${BUILD_DIR}/%/trace.pb: ${BUILD_DIR}/%/system.iso
 	${BOCHS_RUNNER} ${BOCHS_RUNNER_ARGS} -1 \
 	-f ${FAIL_TRACE} \
-	-e $(shell dirname $<)/system.elf              \
-	-i $(shell dirname $<)/system.iso              \
+	-e $(shell dirname $<)/$*/system.elf \
+	-i $(shell dirname $<)/$*/system.iso \
 	-- \
 	-Wf,--state-file=$(shell dirname $<)/state \
 	-Wf,--trace-file=$(shell dirname $<)/trace.pb \
@ -100,7 +115,6 @@ ${BUILD_DIR}/%/trace.pb: ${BUILD_DIR}/%/system.iso
 	-Wf,--end-symbol=stop_trace \
 	-Wf,--check-bounds

-
 client-%:
 	${BOCHS_RUNNER} ${BOCHS_RUNNER_ARGS} \
 	-f ${FAIL_INJECT} \
@ -144,11 +158,13 @@ import-arch-%: ${BUILD_DIR}/%/trace.pb ${HOME}/.my.cnf
 	${FAIL_IMPORT} -v ${ARCH}/$(patsubst import-arch-%,%,$@) -b ip   -t $< -e $(shell dirname $<)/system.elf -i RegisterImporter --no-gp --ip
 	${FAIL_PRUNE}  -v ${ARCH}/$(patsubst import-arch-%,%,$@) -b %% --overwrite

-
 define arch-make-targets

 build-$1: ${BUILD_DIR}/$1/system.iso

 trace-$1: ${BUILD_DIR}/$1/trace.pb

+objdump-$1:
+	objdump --disassemble --disassembler-options intel --disassembler-color=on --source ${BUILD_DIR}/$1/system.elf
+
 endef
--- a/examples/arch/bochs/bochsrc-docker.txt
+++ b/examples/arch/bochs/bochsrc-docker.txt
@ -0,0 +1,9 @@
+megs: 32
+display_library: nogui
+romimage: file=/home/ubuntu/examples/arch/bochs/BIOS-bochs-latest
+vgaromimage: file=/home/ubuntu/examples/arch/bochs/vgabios.bin
+ata0-master: type=cdrom, path=/home/ubuntu/examples/build-bochs/sum/system.iso, status=inserted
+boot: cdrom
+log: bochslog.txt
+clock: sync=realtime, time0=local
+cpu: count=1, ips=1000000
--- a/examples/arch/bochs/bochsrc-host.txt
+++ b/examples/arch/bochs/bochsrc-host.txt
@ -0,0 +1,10 @@
+megs: 32
+display_library: nogui
+romimage: file="/home/christoph/Notes/TU/MastersThesis/3 Wasm/examples/arch/bochs/BIOS-bochs-latest"
+vgaromimage: file="/home/christoph/Notes/TU/MastersThesis/3 Wasm/examples/arch/bochs/vgabios.bin"
+ata0-master: type=cdrom, path="/home/christoph/Notes/TU/MastersThesis/3 Wasm/examples/build-bochs/sum/system.iso", status=inserted
+boot: cdrom
+log: bochslog.txt
+clock: sync=realtime, time0=local
+cpu: count=1, ips=1000000
+sound: driver=dummy
--- a/examples/arch/bochs/lib.c
+++ b/examples/arch/bochs/lib.c
@ -1,4 +0,0 @@
-#pragma once
-
-#define ARCH_ASM_CLOBBER_ALL "eax", "ebx", "ecx", "edx", "esi", "edi", "ebp"
-
--- a/examples/arch/linux.mk
+++ b/examples/arch/linux.mk
@ -0,0 +1,84 @@
+# C -> WASM
+WASI_ROOT := /opt/wasi-sdk
+WASI_CC := ${WASI_ROOT}/bin/clang
+WASI_CFLAGS := --target=wasm64 \
+				 --sysroot=${WASI_ROOT}/share/wasi-sysroot \
+				 -z stack-size=4096 \
+				 -O0 -g -nostdlib \
+				 -Wl,--no-entry \
+				 -Wl,--initial-memory=65536 \
+				 -Wl,--export-all \
+				 -Wl,--export=__heap_base \
+				 -Wl,--export=__data_end
+
+# WASM -> Baremetal
+WAMR := /opt/wamr
+IWASM_LIB := /opt/wamr-libiwasm-64
+CC := gcc
+# NOTE: When compiling I get "error: bp cannot be used in ‘asm’ here"
+#       I could remove "ebp" from the clobber list (ARCH_ASM_CLOBBER_ALL) or
+#       use the -fomit-frame-pointer flag to tell gcc it shouldn't rely on ebp for enter/leave...
+CFLAGS := -I. -O0 -g -ffunction-sections -std=c11 -fomit-frame-pointer
+LDFLAGS = $^ -Wl,--build-id=none -static -nostdlib \
+		 -Wl,-rpath,${IWASM_LIB} -L${IWASM_LIB} -liwasm -lgcc
+INCL := -I${WAMR}/core/iwasm/include \
+		 -I${WAMR}/core/shared/utils \
+		 -I${WAMR}/core/shared/platform/baremetal
+WAMRC := /opt/wamr-wamrc/wamrc
+WAMRCFLAGS := --target=i386 --format=object
+XXD := busybox xxd
+
+################################################################
+# C -> WASM
+${BUILD_DIR}/%/module.wasm: %.c
+	mkdir -p $(shell dirname $@)
+	${WASI_CC} ${WASI_CFLAGS} $< -o $@
+
+################################################################
+# WASM -> Native Object File
+# ${BUILD_DIR}/%/system.o: ${BUILD_DIR}/%/module.wasm
+# 	${WAMRC} ${WAMRCFLAGS} -o ${BUILD_DIR}/$*/system.o ${BUILD_DIR}/$*/module.wasm
+#
+# ${BUILD_DIR}/startup.o: arch/bochs/startup.s
+# 	${CC} $< ${CFLAGS} -c -o $@
+#
+# ${BUILD_DIR}/%/system.elf: ${BUILD_DIR}/%/system.o ${BUILD_DIR}/startup.o
+# 	${CC} ${LDFLAGS} -o $@
+
+################################################################
+# WASM -> AOT -> Loaded by Runtime
+${BUILD_DIR}/%/module.aot: ${BUILD_DIR}/%/module.wasm
+	${WAMRC} -o $@ $<
+
+${BUILD_DIR}/%/module_wasm.c: ${BUILD_DIR}/%/module.aot
+	${XXD} -i $< > $@
+
+${BUILD_DIR}/%/system.o: ${BUILD_DIR}/%/module_wasm.c
+	cp embed/host.c ${BUILD_DIR}/$*/module_host.c
+	sed -i \
+	    -e "s/__WASM_ARRAY_FILE__/module_wasm.c/g" \
+	    -e "s/__WASM_ARRAY__/build_linux_$*_module_aot/g" \
+	    -e "s/__WASM_ARRAY_LEN__/build_linux_$*_module_aot_len/g" \
+	    ${BUILD_DIR}/$*/module_host.c
+	${CC} ${CFLAGS} ${INCL} -c ${BUILD_DIR}/$*/module_host.c -o $@
+
+${BUILD_DIR}/startup.o: arch/bochs/startup.s
+	${CC} $< ${CFLAGS} -c -o $@
+
+${BUILD_DIR}/%/system.elf: ${BUILD_DIR}/%/system.o ${BUILD_DIR}/startup.o
+	${CC} ${LDFLAGS} -o $@
+
+define arch-make-targets
+
+build-$1: ${BUILD_DIR}/$1/system.elf
+
+gdb-$1:
+	gdb --tui ${BUILD_DIR}/$1/system.elf
+
+valgrind-$1:
+	valgrind ${BUILD_DIR}/$1/system.elf
+
+objdump-$1:
+	objdump --disassemble --start-address=0x401000 --stop-address=0x401200 --disassembler-options intel --disassembler-color=on --source ${BUILD_DIR}/$1/system.elf
+
+endef
--- a/examples/embed/host.c
+++ b/examples/embed/host.c
@ -1,18 +1,14 @@
 // https://github.com/bytecodealliance/wasm-micro-runtime/blob/WAMR-2.4.4/doc/embed_wamr.md

-// #include <stdio.h>
-#include <string.h>
-
 #include "lib.c"

-// #include "bh_read_file.h"
 #include "bh_platform.h"
 #include "wasm_export.h"

 #include "__WASM_ARRAY_FILE__"

-#define STACK_SIZE (8 * 1024)
-#define HEAP_SIZE (8 * 1024)
+#define STACK_SIZE (4 * 1024)
+#define HEAP_SIZE (4 * 1024)

 // TODO: Set this up so the lsp actually finds the includes...

@ -22,14 +18,16 @@ MAIN() {
  wasm_module_inst_t module_inst;
  wasm_function_inst_t func;
  wasm_exec_env_t exec_env;
-  uint32 stack_size = 8 * 1024;
-  uint32 heap_size = 8 * 1024;

  /* initialize the wasm runtime */
+  static char global_heap_buf[HEAP_SIZE];
  RuntimeInitArgs init_args;
-  memset(&init_args, 0, sizeof(init_args));
+  memset(&init_args, 0, sizeof(RuntimeInitArgs));

-  init_args.mem_alloc_type = Alloc_With_System_Allocator;
+  init_args.mem_alloc_type = Alloc_With_Pool;
+  init_args.mem_alloc_option.pool.heap_buf = global_heap_buf;
+  init_args.mem_alloc_option.pool.heap_size = sizeof(global_heap_buf);
+  init_args.max_thread_num = 1;
  if (!wasm_runtime_full_init(&init_args)) {
    return;
  }
@ -39,14 +37,14 @@ MAIN() {
                             sizeof(error_buf));

  /* create an instance of the WASM module (WASM linear memory is ready) */
-  module_inst = wasm_runtime_instantiate(module, stack_size, heap_size,
+  module_inst = wasm_runtime_instantiate(module, STACK_SIZE, HEAP_SIZE,
                                         error_buf, sizeof(error_buf));

  /* lookup a WASM function by its name, the function signature can NULL here */
  func = wasm_runtime_lookup_function(module_inst, "wasm_module");

  /* create an execution environment to execute arbitrary WASM functions */
-  exec_env = wasm_runtime_create_exec_env(module_inst, stack_size);
+  exec_env = wasm_runtime_create_exec_env(module_inst, STACK_SIZE);

  /* arguments are always transferred in 32-bit element */
  uint32 args[1];
--- a/examples/lib.c
+++ b/examples/lib.c
@ -6,6 +6,12 @@
 #define __QUOTE(x) #x
 #define QUOTE(x) __QUOTE(x)

+#ifndef ARCH_ASM_CLOBBER_ALL
+// TODO: Is my gcc to new? It won't let me clobber ebp unless I specify
+// -fomit-frame-pointer
+#define ARCH_ASM_CLOBBER_ALL "eax", "ebx", "ecx", "edx", "esi", "edi", "ebp"
+#endif
+
 #ifndef MARKER
 #define MARKER(str)                                                            \
  __asm__ volatile(QUOTE(str) ":"                                              \
--- a/examples/linker.ld
+++ b/examples/linker.ld
@ -18,6 +18,7 @@ SECTIONS {
    /* Code and readonly data */
    .text : {
        /* fill gaps with int3 opcode to detect invalid jumps */
+        /* TODO: This crashes bochs */
        FILL(0xcc)

        /* multiboot header */
@ -55,9 +56,20 @@ SECTIONS {
        KEEP (*(".startup_stack"))
        KEEP (*(".kernel_stack"))
        *(".data*")
-        *(COMMON);
    }

+    /* Uninitialized data */
+    .bss : {
+        _sbss = .;
+        *(.bss*)
+        *(COMMON)
+        _ebss = .;
+    }
+
+    /* Align and mark end of all sections — heap starts here */
+    . = ALIGN(4096);
+    _end = .;
+
    /* Memory-mapped I/O APIC */
    _sioapic = 0xFEC00000;
    ioapic = 0xFEC00000;
--- a/examples/syscalls.c
+++ b/examples/syscalls.c
@ -0,0 +1,35 @@
+#include <errno.h>
+#include <sys/stat.h>
+
+extern char _end; /* provided by linker script */
+static char *heap_ptr = &_end;
+
+void *sbrk(int incr) {
+  char *prev = heap_ptr;
+  heap_ptr += incr;
+  return prev;
+}
+
+int write(int fd, const char *buf, int len) { return len; }
+
+int read(int fd, char *buf, int len) { return 0; }
+int close(int fd) { return -1; }
+int fstat(int fd, struct stat *st) {
+  st->st_mode = S_IFCHR;
+  return 0;
+}
+int isatty(int fd) { return 1; }
+int lseek(int fd, int offset, int whence) { return 0; }
+void _exit(int status) {
+  while (1)
+    ;
+}
+void exit(int status) {
+  while (1)
+    ;
+}
+int kill(int pid, int sig) {
+  errno = EINVAL;
+  return -1;
+}
+int getpid(void) { return 1; }
--- a/wasm-base.dockerfile
+++ b/wasm-base.dockerfile
@ -1,7 +1,72 @@
+# We need an old ubuntu version with an old enough gcc to build an old gcc...
+# This gcc can't bootstrap itself because it's target is another platform.
+FROM ubuntu:bionic AS compiler-builder
+
+RUN apt-get update \
+ && DEBIAN_FRONTEND=noninteractive TZ=Europe/Berlin apt-get install -y --no-install-recommends \
+    build-essential \
+    git \
+    ca-certificates \
+    cmake \
+    bison \
+    flex \
+    libgmp3-dev \
+    libmpc-dev \
+    libmpfr-dev \
+    texinfo \
+    libisl-dev \
+    wget \
+ && apt-get clean
+
+ARG GCCVERSION=5.4.0
+ARG BINUTILSVERSION=2.26.1
+ARG CROSSPREFIX=/opt/crosscompiler
+ARG CROSSTARGET=i686-elf
+
+# Build Binutils for cross-compilation
+WORKDIR /
+RUN wget https://ftp.gnu.org/gnu/binutils/binutils-$BINUTILSVERSION.tar.gz \
+ && tar xf binutils-$BINUTILSVERSION.tar.gz
+RUN mkdir binutils-build && cd binutils-build \
+ && /binutils-$BINUTILSVERSION/configure --target=$CROSSTARGET --prefix="$CROSSPREFIX" --with-sysroot --disable-nls --disable-werror \
+ && make -j$(nproc) \
+ && make install
+
+# Build GCC for cross-compilation
+WORKDIR /
+RUN wget https://ftp.gnu.org/gnu/gcc/gcc-$GCCVERSION/gcc-$GCCVERSION.tar.gz \
+ && tar xf gcc-$GCCVERSION.tar.gz \
+ && cd gcc-$GCCVERSION \
+ && contrib/download_prerequisites
+RUN mkdir gcc-build && cd gcc-build \
+ && PATH="$CROSSPREFIX/bin:$PATH" /gcc-$GCCVERSION/configure --target=$CROSSTARGET --prefix="$CROSSPREFIX" --disable-nls --enable-languages=c,c++ --without-headers --disable-hosted-libstdcxx --disable-libsanitizer --disable-threads \
+ && PATH="$CROSSPREFIX/bin:$PATH" make all-gcc -j$(nproc) \
+ && PATH="$CROSSPREFIX/bin:$PATH" make all-target-libgcc -j$(nproc) \
+ && PATH="$CROSSPREFIX/bin:$PATH" make install-gcc \
+ && PATH="$CROSSPREFIX/bin:$PATH" make install-target-libgcc
+ # && PATH="$CROSSPREFIX/bin:$PATH" make all-target-libstdc++-v3 -j$(nproc) \
+ # && PATH="$CROSSPREFIX/bin:$PATH" make install-target-libstdc++-v3
+
+# Build newlib
+ARG NEWLIBVERSION=4.1.0
+WORKDIR /
+RUN wget ftp://sourceware.org/pub/newlib/newlib-$NEWLIBVERSION.tar.gz \
+ && tar xf newlib-$NEWLIBVERSION.tar.gz
+RUN mkdir newlib-build && cd newlib-build \
+ && PATH="$CROSSPREFIX/bin:$PATH" /newlib-$NEWLIBVERSION/configure \
+    --target=$CROSSTARGET \
+    --prefix="$CROSSPREFIX" \
+    --disable-nls \
+    --disable-newlib-supplied-syscalls \
+ && PATH="$CROSSPREFIX/bin:$PATH" make -j$(nproc) \
+ && PATH="$CROSSPREFIX/bin:$PATH" make install
+
+# =============================================================================
+
 FROM ubuntu:noble AS wamr-builder

 RUN apt-get update \
- && DEBIAN_FRONTEND=noninteractive TZ=Europe/Berline apt-get install -y --no-install-recommends \
+ && DEBIAN_FRONTEND=noninteractive TZ=Europe/Berlin apt-get install -y --no-install-recommends \
    build-essential \
    gcc-multilib \
    g++-multilib \
@ -16,6 +81,7 @@ RUN apt-get update \
    python3-minimal \
    python3-pip \
    ninja-build \
+    wget \
 && apt-get clean

 # TODO: Can't find pthread on X86_32
@ -28,26 +94,27 @@ RUN python3 -m pip config set global.break-system-packages true
 RUN git clone https://gitea.vps.chriphost.de/christoph/wamr \
 && cd wamr \
 && git checkout WAMR-2.4.4
-WORKDIR /wamr

 # Build WAMR iwasm (vmcore standalone interpreter)
-# RUN cd product-mini/platforms/linux \
-#  && mkdir build_iwasm && cd build_iwasm \
-#  && cmake \
-#     -DWAMR_BUILD_PLATFORM=linux \
-#     -DWAMR_BUILD_TARGET=X86_64 \
-#     -DWAMR_BUILD_AOT=0 \
-#     -DWAMR_BUILD_WAMR_COMPILER=0 \
-#     -DWAMR_BUILD_INTERP=1 \
-#     -DWAMR_BUILD_FAST_INTERP=0 \
-#     -DWAMR_BUILD_JIT=0 \
-#     -DWAMR_BUILD_FAST_JIT=0 \
-#     -DWAMR_BUILD_LIBC_BUILTIN=1 \
-#     -DWAMR_BUILD_LIBC_WASI=1 \
-#     .. \
-#  && make -j$(nproc)
+WORKDIR /wamr
+RUN cd product-mini/platforms/linux \
+ && mkdir build_iwasm && cd build_iwasm \
+ && cmake \
+    -DWAMR_BUILD_PLATFORM=linux \
+    -DWAMR_BUILD_TARGET=X86_64 \
+    -DWAMR_BUILD_AOT=0 \
+    -DWAMR_BUILD_WAMR_COMPILER=0 \
+    -DWAMR_BUILD_INTERP=1 \
+    -DWAMR_BUILD_FAST_INTERP=0 \
+    -DWAMR_BUILD_JIT=0 \
+    -DWAMR_BUILD_FAST_JIT=0 \
+    -DWAMR_BUILD_LIBC_BUILTIN=1 \
+    -DWAMR_BUILD_LIBC_WASI=1 \
+    .. \
+ && make -j$(nproc)

 # Build WAMR wamrc (standalone compiler)
+WORKDIR /wamr
 RUN cd wamr-compiler \
 && ./build_llvm.sh \
 && mkdir build_wamrc && cd build_wamrc \
@ -74,9 +141,11 @@ WORKDIR /
 RUN git clone https://gitea.vps.chriphost.de/christoph/wamr wamrlib \
 && cd wamrlib \
 && git checkout WAMR-2.4.4
-WORKDIR /wamrlib
+
+# TODO: Should this stuff not be compiled with the crosscompiler?

 # Build WAMR libvmlib (compiler runtime - to compile wasm modules embedded in a native application)
+# WORKDIR /wamrlib
 # RUN cd wamr-compiler \
 #  && ./build_llvm.sh \
 #  # && ./build_llvm.sh --extra-cmake-flags "-DCMAKE_C_FLAGS=-m32 -DCMAKE_CXX_FLAGS=-m32 -DCMAKE_EXE_LINKER_FLAGS=-m32 -lstdc++" \
@ -97,6 +166,7 @@ WORKDIR /wamrlib
 #  && make -j$(nproc)

 # Build WAMR libiwasm (vmcore interpreter runtime - to run wasm modules embedded in a native application)
+WORKDIR /wamrlib
 RUN mkdir build_libiwasm && cd build_libiwasm \
 && cmake \
    -DWAMR_BUILD_PLATFORM=baremetal \
@ -110,6 +180,25 @@ RUN mkdir build_libiwasm && cd build_libiwasm \
    -DWAMR_BUILD_LIBC_BUILTIN=1 \
    -DWAMR_BUILD_LIBC_WASI=0 \
    -DWAMR_BUILD_SIMD=0 \
+    -DCMAKE_COLOR_DIAGNOSTICS=ON \
+    .. \
+ && make -j$(nproc)
+
+WORKDIR /wamrlib
+RUN mkdir build_libiwasm_64 && cd build_libiwasm_64 \
+ && cmake \
+    -DWAMR_BUILD_PLATFORM=baremetal \
+    -DWAMR_BUILD_TARGET=X86_64 \
+    -DWAMR_BUILD_AOT=0 \
+    -DWAMR_BUILD_WAMR_COMPILER=0 \
+    -DWAMR_BUILD_INTERP=1 \
+    -DWAMR_BUILD_FAST_INTERP=0 \
+    -DWAMR_BUILD_JIT=0 \
+    -DWAMR_BUILD_FAST_JIT=0 \
+    -DWAMR_BUILD_LIBC_BUILTIN=1 \
+    -DWAMR_BUILD_LIBC_WASI=0 \
+    -DWAMR_BUILD_SIMD=0 \
+    -DCMAKE_COLOR_DIAGNOSTICS=ON \
    .. \
 && make -j$(nproc)

@ -128,18 +217,24 @@ RUN apt-get update \
    neovim \
    ranger \
    wabt \
+    gdb \
+    valgrind \
    fish \
    grub-common \
    xorriso \
    grub-pc-bin \
+    bochs \
 && apt-get clean

-COPY --from=wamr-builder /wamr /opt/wamr
-COPY --from=wamr-builder /wamrlib /opt/wamrlib
+COPY --from=compiler-builder /opt/crosscompiler /opt/crosscompiler
+COPY --from=wamr-builder /wamrlib /opt/wamr
+COPY --from=wamr-builder /wamr/wamr-compiler/build_wamrc /opt/wamr/wamr-compiler/build_wamrc
+COPY --from=wamr-builder /wamr/product-mini/platforms/linux/build_iwasm /opt/wamr/product-mini/platforms/linux/build_iwasm
 RUN ln -sf /opt/wamr/product-mini/platforms/linux/build_iwasm /opt/wamr-iwasm \
 && ln -sf /opt/wamr/wamr-compiler/build_wamrc /opt/wamr-wamrc \
- && ln -sf /opt/wamrlib/wamr-compiler/build_libvmlib /opt/wamr-libvmlib \
- && ln -sf /opt/wamrlib/build_libiwasm /opt/wamr-libiwasm
+ && ln -sf /opt/wamr/wamr-compiler/build_libvmlib /opt/wamr-libvmlib \
+ && ln -sf /opt/wamr/build_libiwasm /opt/wamr-libiwasm \
+ && ln -sf /opt/wamr/build_libiwasm_64 /opt/wamr-libiwasm-64

 COPY ./examples /home/ubuntu/examples
 WORKDIR /home/ubuntu/examples
Author	SHA1	Message	Date
Christoph Urlacher	68bd098624	Add i368-elf-gcc v5.4 crosscompiler	2026-02-23 19:58:18 +01:00
Christoph Urlacher	25cb90296f	Add gitea workflow	2026-02-09 13:11:55 +01:00
Christoph Urlacher	650f457c5b	use pool memory allocator for wasm runtime	2026-02-05 23:45:13 +01:00
Christoph Urlacher	2f8f737bb8	add linux x64 arch makefile	2026-02-05 23:45:03 +01:00
Christoph Urlacher	6381727851	set correct stack_size for wamr	2026-02-05 17:55:37 +01:00
Christoph Urlacher	6307a01b6f	disable -O2	2026-02-05 17:55:22 +01:00
Christoph Urlacher	fc57777a5b	makefile: add bochs-only target	2026-02-05 17:53:08 +01:00
Christoph Urlacher	b62e56c130	dockerfile: update for baremetal platform	2026-02-05 17:52:59 +01:00
Christoph Urlacher	e742cec923	add bochsrc files	2026-02-05 17:52:13 +01:00
Christoph Urlacher	b8f4e987b7	move clobber definition into base lib.c	2026-01-29 00:55:02 +01:00