import newlib-2000-02-17 snapshot

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 0000000..5c5b0f6
--- /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
+