diff options
Diffstat (limited to 'newlib/libc/sys/rtems/crt0.c')
| -rw-r--r-- | newlib/libc/sys/rtems/crt0.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/newlib/libc/sys/rtems/crt0.c b/newlib/libc/sys/rtems/crt0.c new file mode 100644 index 00000000000..5c5b0f66120 --- /dev/null +++ b/newlib/libc/sys/rtems/crt0.c @@ -0,0 +1,48 @@ +void rtems_provides_crt0( void ) {} +/* + * RTEMS Fake crt0 + * + * Each RTEMS BSP provides its own crt0 and linker script. Unfortunately + * this means that crt0 and the linker script are not available as + * each tool is configured. Without a crt0 and linker script, some + * targets do not successfully link "conftest.c" during the configuration + * process. So this fake crt0.c provides all the symbols required to + * successfully link a program. The resulting program will not run + * but this is enough to satisfy the autoconf macro AC_PROG_CC. + */ + +/* RTEMS provides some of its own routines including a Malloc family */ + +void *malloc() { return 0; } +void *realloc() { return 0; } +void free() { ; } +void abort() { ; } +int raise() { return -1; } + +/* The PowerPC expects certain symbols to be defined in the linker script. */ + +#if defined(__PPC__) + int __SDATA_START__; int __SDATA2_START__; + int __GOT_START__; int __GOT_END__; + int __GOT2_START__; int __GOT2_END__; + int __SBSS_END__; int __SBSS2_END__; + int __FIXUP_START__; int __FIXUP_END__; + int __EXCEPT_START__; int __EXCEPT_END__; + int __init; int __fini; +#endif + +/* The hppa expects this to be defined in the real crt0.s. + * Also for some reason, the hppa1.1 does not find atexit() + * during the AC_PROG_CC tests. + */ + +#if defined(__hppa__) +/* + asm ( ".subspa \$GLOBAL\$,QUAD=1,ALIGN=8,ACCESS=0x1f,SORT=40"); + asm ( ".export \$global\$" ); + asm ( "\$global\$:"); +*/ + + int atexit(void (*function)(void)) { return 0; } +#endif + |