baremetal: remove unnecessary functions

CMakeLists.txt

@@ -183,6 +183,14 @@ set_target_properties (vmlib PROPERTIES PUBLIC_HEADER "${WAMR_PUBLIC_HEADERS}")
 
 set_version_info (vmlib)
 
+message("CMAKE_BUILD_TYPE: ${CMAKE_BUILD_TYPE}")
+message("CMAKE_C_FLAGS: ${CMAKE_C_FLAGS}")
+message("CMAKE_C_FLAGS_DEBUG: ${CMAKE_C_FLAGS_DEBUG}")
+message("CMAKE_C_FLAGS_RELEASE: ${CMAKE_C_FLAGS_RELEASE}")
+message("CMAKE_CXX_FLAGS: ${CMAKE_CXX_FLAGS}")
+message("CMAKE_CXX_FLAGS_DEBUG: ${CMAKE_CXX_FLAGS_DEBUG}")
+message("CMAKE_CXX_FLAGS_RELEASE: ${CMAKE_CXX_FLAGS_RELEASE}")
+
 install (TARGETS vmlib
   EXPORT iwasmTargets
   LIBRARY DESTINATION lib

core/shared/platform/baremetal/platform_init.c

@@ -1,5 +1,15 @@
 #include "platform_api_vmcore.h"
 
+void
+os_dcache_flush(void)
+{
+}
+
+void
+os_icache_flush(void *start, size_t len)
+{
+}
+
 int
 os_cond_init(korp_cond *cond)
 {
@@ -18,80 +28,71 @@ os_dumps_proc_mem_info(char *out, unsigned int size)
     return -1;
 }
 
-__attribute__((weak)) void
-bh_print_proc_mem(const char *prompt)
-{
-}
-
-__attribute__((weak)) void
-bh_log_proc_mem(const char *function, uint32 line)
-{
-}
-
-/****************************************************
- * string
- ****************************************************/
-
-// void *
-// memcpy(void *restrict dest, const void *restrict src, size_t n)
-// {
-//     unsigned char *d = (unsigned char *)dest;
-//     const unsigned char *s = (const unsigned char *)src;
-//
-//     while (n--)
-//         *d++ = *s++;
-//
-//     return dest;
-// }
-//
-// void *
-// memmove(void *dest, const void *src, size_t n)
-// {
-//     unsigned char *d = (unsigned char *)dest;
-//     const unsigned char *s = (const unsigned char *)src;
-//
-//     if (d == s || n == 0)
-//         return dest;
-//
-//     if (d < s) {
-//         /* forward copy */
-//         while (n--)
-//             *d++ = *s++;
-//     }
-//     else {
-//         /* backward copy */
-//         d += n;
-//         s += n;
-//         while (n--)
-//             *--d = *--s;
-//     }
-//
-//     return dest;
-// }
-//
-// void *
-// memset(void *dest, int c, size_t n)
-// {
-//     unsigned char *p = dest;
-//     while (n--)
-//         *p++ = (unsigned char)c;
-//     return dest;
-// }
-
 /****************************************************
  * mman
  ****************************************************/
 
+// Need os_mmap for aot_load_from_aot_file
+//
+// Stacktrace:
+// #5  0x0805e5c1 in os_mmap
+// #6  0x080524d3 in loader_mmap
+// #7  0x08059294 in create_sections
+// #8  0x08059553 in load
+// #9  0x0805966b in aot_load_from_aot_file
+// #10 0x08048c34 in wasm_runtime_load_ex
+// #11 0x08048cff in wasm_runtime_load
+// #12 0x08048112 in main
+
+// I hope this isn't too simple
+static uint8_t mmap_space[MMAP_SPACE_SIZE];
+static size_t mmap_offset = 0; // Free space begins here
+
+static size_t
+align_up(size_t x, size_t a)
+{
+    // a is a power of two, e.g., 8:
+    // x+a-1: Shift value upwards to the next alignment "bucket"
+    // a-1: 00000111, ~(a-1): 11111000 - Clears the lower bits/alignment
+    // remainder
+    return (x + a - 1) & ~(a - 1);
+}
+
 void *
 os_mmap(void *hint, size_t size, int prot, int flags, os_file_handle file)
 {
-    return NULL;
+    // Free space begins here (aligned)
+    size_t start = align_up(mmap_offset, PAGE_SIZE);
+
+    // How much we're mapping
+    size_t end = start + align_up(size, PAGE_SIZE);
+
+    if (end > MMAP_SPACE_SIZE) {
+        return NULL;
+    }
+
+    void *ptr = &mmap_space[start];
+    mmap_offset = end;
+
+    return ptr;
 }
 
 void *
 os_mremap(void *old_addr, size_t old_size, size_t new_size)
 {
-    return NULL;
+    // Map the new size
+    void *new_addr = os_mmap(NULL, new_size, 0, 0, -1);
+    if (!new_addr) {
+        return NULL;
+    }
+
+    // Copy the old memory to the new mapped address
+    if (old_addr) {
+        size_t copy_size = old_size < new_size ? old_size : new_size;
+        memcpy(new_addr, old_addr, copy_size);
+    }
+
+    return new_addr;
 }
 
 void
@@ -105,22 +106,6 @@ os_mprotect(void *addr, size_t size, int prot)
     return 0;
 }
 
-/****************************************************
- * math
- ****************************************************/
-
-double
-sqrt(double x)
-{
-    return 0.0;
-}
-
-float
-sqrtf(float x)
-{
-    return 0.0;
-}
-
 /****************************************************
  *                     Section 1                    *
  *        Interfaces required by the runtime        *

core/shared/platform/baremetal/platform_internal.h

@@ -3,13 +3,14 @@
 
 #include <inttypes.h>
 #include <stdbool.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <stdarg.h>
+
 // #include <assert.h>
 // #include <time.h>
-// #include <string.h>
-#include <stdio.h>
-// #include <stdlib.h>
-// #include <math.h>
-#include <stdarg.h>
 // #include <ctype.h>
 // #include <pthread.h>
 // #include <signal.h>
@@ -42,6 +43,9 @@ extern "C" {
 #define BH_APPLET_PRESERVED_STACK_SIZE (8 * 1024)
 #define BH_THREAD_DEFAULT_PRIORITY 0
 
+#define PAGE_SIZE 4096
+#define MMAP_SPACE_SIZE (2 * 1024 * 1024)
+
 typedef int korp_tid;
 typedef struct {
     int dummy;
@@ -77,17 +81,9 @@ os_get_invalid_handle(void)
 static inline int
 os_getpagesize()
 {
-    // TODO: What pagesize? 65536?
-    return 4096;
+    return PAGE_SIZE;
 }
 
-// void *
-// memcpy(void *restrict dest, const void *restrict src, size_t n);
-// void *
-// memmove(void *dest, const void *src, size_t n);
-// void *
-// memset(void *dest, int c, size_t n);
-
 #ifdef __cplusplus
 }
 #endif

core/shared/platform/baremetal/shared_platform.cmake

@@ -5,8 +5,6 @@ add_definitions(-DBH_PLATFORM_BAREMETAL)
 include_directories(${PLATFORM_SHARED_DIR})
 
 include_directories(${PLATFORM_SHARED_DIR}/../include)
-# file (GLOB header ${PLATFORM_SHARED_DIR}/../include/baremetal/*.h)
-# list (APPEND RUNTIME_LIB_HEADER_LIST ${header})
 
 file (GLOB_RECURSE source_all ${PLATFORM_SHARED_DIR}/*.c)
 set (PLATFORM_SHARED_SOURCE ${source_all})