add sample program of lvgl over PEG for 5gen brain

x1/event_dumper/libbrain/Makefile

@@ -0,0 +1,23 @@
+CROSS_COMPILE := arm-linux-gnueabihf-
+AS := $(CROSS_COMPILE)as
+AR := $(CROSS_COMPILE)ar
+
+TARGET := libbrain.a
+OBJS := sys.o
+
+ASFLAGS := -W
+ARFLAGS := -crs
+
+.PHONY:
+all: $(TARGET)
+
+.PHONY:
+clean:
+	-rm -f $(TARGET) *.o
+
+%.o: %.s
+	$(AS) $(ASFLAGS) $< -o $@
+
+$(TARGET): $(OBJS)
+	$(AR) $(ARFLAGS) $@ $^
+

x1/event_dumper/libbrain/libbrain.h

@@ -0,0 +1,57 @@
+#ifndef H_LIB_BRAIN_H
+#define H_LIB_BRAIN_H
+
+typedef unsigned long size_t;
+typedef void FILE;
+typedef void* DIR;
+
+struct stat {
+    unsigned int flags;
+    unsigned int st_atim;
+    unsigned int st_mtim;
+    unsigned int st_ctim;
+    size_t st_size;
+};
+
+struct dirent {
+    unsigned int type;
+    size_t size;
+    size_t filename_length;
+    char filename[260];
+};
+
+enum {
+    SEEK_SET = 0,
+    SEEK_CUR,
+    SEEK_END,
+};
+
+void *malloc(size_t size);
+void *realloc(void* ptr, size_t size);
+int free(void *ptr);
+void *memcpy(void *dst, const void *src, size_t n);
+void *memset(void *ptr, int ch, size_t n);
+FILE *fopen(const char *filename, const char *mode);
+int fclose(FILE *stream);
+int ftell(FILE *stream);
+size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream);
+size_t fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream);
+int fseek(FILE *stream, int offset, int whence);
+int feof(FILE *stream);
+int fflush(FILE *stream);
+int fgetc(FILE *stream);
+char *fgets(char *s, int n, FILE *stream);
+int fputc(int ch, FILE *stream);
+int fputs(const char *str, FILE *stream);
+int ferror(FILE *stream);
+int remove(const char *filepath);
+int rename(const char *oldpath, const char *newpath);
+int mkdir(const char *pathname);
+int stat(const char *filepath, struct stat *buf);
+int closedir(DIR *dirp);
+struct dirent *readdir(DIR *dirp);
+DIR *opendir(const char *pathname);
+
+int printf(const char *fmt,...);
+
+#endif

x1/event_dumper/libbrain/sys.s

@@ -0,0 +1,39 @@
+.text
+.align 4
+
+.macro thunk name, addr
+.global \name
+.type   \name, %function
+\name:
+    ldr     pc, [pc, #-4]
+    .word   \addr
+.endm
+
+thunk malloc,   0x600063c4
+thunk free,     0x600063c8
+thunk realloc,  0x600063d0
+
+thunk fopen,    0x60006400
+thunk fclose,   0x60006404
+thunk ftell,    0x60006408
+thunk fread,    0x6000640c
+thunk fwrite,   0x60006410
+thunk feof,     0x60006418
+thunk fflush,   0x6000641c
+thunk fgetc,    0x60006420
+thunk fgets,    0x60006424
+thunk fputc,    0x60006428
+thunk fputs,    0x6000642c
+thunk ferror,   0x60006430
+thunk remove,   0x60006434
+thunk rename,   0x60006438
+thunk mkdir,    0x6000643c
+thunk stat,     0x60006444
+
+thunk closedir, 0x6000644c
+thunk readdir,  0x60006450
+thunk opendir,  0x60006454
+
+thunk printf,   0x60092004
+thunk memset,   0x60092108
+thunk memcpy,   0x60092118