diff options
Diffstat (limited to 'wirish')
| -rw-r--r-- | wirish/rules.mk | 7 | ||||
| -rw-r--r-- | wirish/start.S | 27 | ||||
| -rw-r--r-- | wirish/start_c.c | 65 |
3 files changed, 97 insertions, 2 deletions
diff --git a/wirish/rules.mk b/wirish/rules.mk index 6aa0904..1bf6245 100644 --- a/wirish/rules.mk +++ b/wirish/rules.mk @@ -12,8 +12,9 @@ WIRISH_INCLUDES := -I$(d) -I$(d)/comm -I$(d)/boards CFLAGS_$(d) := $(WIRISH_INCLUDES) $(LIBMAPLE_INCLUDES) # Local rules and targets -cSRCS_$(d) := +sSRCS_$(d) := start.S +cSRCS_$(d) := start_c.c cppSRCS_$(d) := wirish_math.cpp \ Print.cpp \ boards.cpp \ @@ -34,10 +35,12 @@ cppSRCS_$(d) := wirish_math.cpp \ ext_interrupts.cpp \ wirish_digital.cpp +sFILES_$(d) := $(sSRCS_$(d):%=$(d)/%) cFILES_$(d) := $(cSRCS_$(d):%=$(d)/%) cppFILES_$(d) := $(cppSRCS_$(d):%=$(d)/%) -OBJS_$(d) := $(cFILES_$(d):%.c=$(BUILD_PATH)/%.o) \ +OBJS_$(d) := $(sFILES_$(d):%.S=$(BUILD_PATH)/%.o) \ + $(cFILES_$(d):%.c=$(BUILD_PATH)/%.o) \ $(cppFILES_$(d):%.cpp=$(BUILD_PATH)/%.o) DEPS_$(d) := $(OBJS_$(d):%.o=%.d) diff --git a/wirish/start.S b/wirish/start.S new file mode 100644 index 0000000..4d1d405 --- /dev/null +++ b/wirish/start.S @@ -0,0 +1,27 @@ +/* + * The authors hereby grant permission to use, copy, modify, distribute, + * and license this software and its documentation for any purpose, provided + * that existing copyright notices are retained in all copies and that this + * notice is included verbatim in any distributions. No written agreement, + * license, or royalty fee is required for any of the authorized uses. + * Modifications to this software may be copyrighted by their authors + * and need not follow the licensing terms described here, provided that + * the new terms are clearly indicated on the first page of each file where + * they apply. + */ + + .text + .code 16 + .thumb_func + + .globl _start + .type _start, %function +_start: + .fnstart + ldr r1,=__cs3_stack + mov sp,r1 + ldr r1,=__cs3_start_c + bx r1 + .pool + .cantunwind + .fnend diff --git a/wirish/start_c.c b/wirish/start_c.c new file mode 100644 index 0000000..cb96fc5 --- /dev/null +++ b/wirish/start_c.c @@ -0,0 +1,65 @@ +/* CS3 start_c routine. + * + * Copyright (c) 2006, 2007 CodeSourcery Inc + * + * The authors hereby grant permission to use, copy, modify, distribute, + * and license this software and its documentation for any purpose, provided + * that existing copyright notices are retained in all copies and that this + * notice is included verbatim in any distributions. No written agreement, + * license, or royalty fee is required for any of the authorized uses. + * Modifications to this software may be copyrighted by their authors + * and need not follow the licensing terms described here, provided that + * the new terms are clearly indicated on the first page of each file where + * they apply. + */ + +#include <stddef.h> + +extern void __libc_init_array (void); + +extern int main (int, char **, char **); + +extern void exit (int) __attribute__ ((noreturn, weak)); + +extern char _data, _edata; +extern char _bss, _ebss; + +struct rom_img_cfg { + long long *img_start; +}; + +extern char _lm_rom_img_cfgp; + +void __attribute__ ((noreturn)) +__cs3_start_c (void) +{ + struct rom_img_cfg *img_cfg = (struct rom_img_cfg*)&_lm_rom_img_cfgp; + long long *src; + long long *dst; + int exit_code; + + /* Initialize .data, if necessary. */ + src = img_cfg->img_start; + dst = (long long*)&_data; + if (src != dst) { + while (dst < (long long*)&_edata) { + *dst++ = *src++; + } + } + + /* Zero .bss. */ + dst = (long long*)&_bss; + while (dst < (long long*)&_ebss) { + *dst++ = 0; + } + + /* Run initializers. */ + __libc_init_array (); + + exit_code = main (0, NULL, NULL); + if (exit) + exit (exit_code); + /* If exit is NULL, make sure we don't return. */ + for (;;) + continue; +} |