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Remove the get_term() function. It pretty much can't work for

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FreeBSD, and makes ugly diffs with the other crt1.c's. Leave
behind a comment (words supplied by Thomas Moestl) that explain
the issue.

OK'ed by:	tmm
This commit is contained in:
Mark Murray 2003-01-26 23:01:36 +00:00
parent a61617ed46
commit 34893fe49b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=109903
1 changed files with 7 additions and 36 deletions
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43
lib/csu/sparc64/crt1.c
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@ -65,51 +65,29 @@ extern int etext;
char **environ;
const char *__progname = "";
/*
* Grab %g1 before it gets used for anything by the compiler.
* Sparc ELF psABI specifies a termination routine (if any) will be in
* %g1
*/
static __inline fptr
get_term(void)
{
fptr retval;
#if 0
#ifdef __GNUC__
__asm__ volatile("mov %%g1,%0" : "=r"(retval));
#else
retval = (fptr)0; /* XXXX Fix this for other compilers */
#endif
#else
retval = (fptr)0; /* XXXX temporary */
#endif
return(retval);
}
/* The entry function. */
/*
* %o0 holds ps_strings pointer. For Solaris compat and/or shared
* libraries, if %g1 is not 0, it is a routine to pass to atexit().
* (By passing the pointer in the usual argument register, we avoid
* having to do any inline assembly, except to recover %g1.)
* %o0 holds ps_strings pointer.
*
* Note: kernel may (is not set in stone yet) pass ELF aux vector in %o1,
* but for now we do not use it here.
*
* The SPARC compliance definitions specifies that the kernel pass the
* address of a function to be executed on exit in %g1. We do not make
* use of it as it is quite broken, because gcc can use this register
* as a temporary, so it is not safe from C code. Its even more broken
* for dynamic executables since rtld runs first.
*/
/* ARGSUSED */
void
_start(char **ap, void (*cleanup)(void), struct Struct_Obj_Entry *obj __unused,
struct ps_strings *ps_strings __unused)
{
void (*term)(void);
int argc;
char **argv;
char **env;
const char *s;
term = get_term();
argc = *(long *)(void *)ap;
argv = ap + 1;
env = ap + 2 + argc;
@ -123,13 +101,6 @@ _start(char **ap, void (*cleanup)(void), struct Struct_Obj_Entry *obj __unused,
__sparc_utrap_setup();
/*
* If the kernel or a shared library wants us to call
* a termination function, arrange to do so.
*/
if (term)
atexit(term);
if (&_DYNAMIC != NULL)
atexit(cleanup);