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crtstuff.c: Move list heads before code that uses them. 

* crtstuff.c: Move list heads before code that uses them.
        (__JCR_LIST__): Remove initial null.
        (frame_dummy, __frame_dummy): Do java registration here ...
        (__do_global_ctors_aux): ... not here.

From-SVN: r45022
This commit is contained in:
Richard Henderson 2001-08-18 20:53:34 -07:00 committed by Richard Henderson
parent 6ca3c22fd1
commit 213f974a3a
2 changed files with 92 additions and 94 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2001-08-18 Richard Henderson <rth@redhat.com>
* crtstuff.c: Move list heads before code that uses them.
(__JCR_LIST__): Remove initial null.
(frame_dummy, __frame_dummy): Do java registration here ...
(__do_global_ctors_aux): ... not here.
2001-08-18 Richard Henderson <rth@redhat.com>
* flow.c (mark_regs_live_at_end): Use regs_invalidated_by_call.

179
gcc/crtstuff.c
View File

@ -98,6 +98,9 @@ extern void *__deregister_frame_info (void *)
extern void *__deregister_frame_info_bases (void *)
TARGET_ATTRIBUTE_WEAK;
/* Likewise for _Jv_RegisterClasses. */
extern void _Jv_RegisterClasses (void *) TARGET_ATTRIBUTE_WEAK;
#ifndef OBJECT_FORMAT_MACHO
#ifdef OBJECT_FORMAT_ELF
@ -118,6 +121,69 @@ typedef void (*func_ptr) (void);
#ifdef INIT_SECTION_ASM_OP
/* NOTE: In order to be able to support SVR4 shared libraries, we arrange
to have one set of symbols { __CTOR_LIST__, __DTOR_LIST__, __CTOR_END__,
__DTOR_END__ } per root executable and also one set of these symbols
per shared library. So in any given whole process image, we may have
multiple definitions of each of these symbols. In order to prevent
these definitions from conflicting with one another, and in order to
ensure that the proper lists are used for the initialization/finalization
of each individual shared library (respectively), we give these symbols
only internal (i.e. `static') linkage, and we also make it a point to
refer to only the __CTOR_END__ symbol in crtend.o and the __DTOR_LIST__
symbol in crtbegin.o, where they are defined. */
/* The -1 is a flag to __do_global_[cd]tors indicating that this table
does not start with a count of elements. */
#ifdef CTOR_LIST_BEGIN
CTOR_LIST_BEGIN;
#elif defined(CTORS_SECTION_ASM_OP)
/* Hack: force cc1 to switch to .data section early, so that assembling
__CTOR_LIST__ does not undo our behind-the-back change to .ctors. */
static func_ptr force_to_data[1] __attribute__ ((__unused__)) = { };
asm (CTORS_SECTION_ASM_OP);
STATIC func_ptr __CTOR_LIST__[1]
__attribute__ ((__unused__, aligned(sizeof(func_ptr))))
= { (func_ptr) (-1) };
#else
STATIC func_ptr __CTOR_LIST__[1]
__attribute__ ((__unused__, section(".ctors"), aligned(sizeof(func_ptr))))
= { (func_ptr) (-1) };
#endif /* __CTOR_LIST__ alternatives */
#ifdef DTOR_LIST_BEGIN
DTOR_LIST_BEGIN;
#elif defined(DTORS_SECTION_ASM_OP)
asm (DTORS_SECTION_ASM_OP);
STATIC func_ptr __DTOR_LIST__[1]
__attribute__ ((aligned(sizeof(func_ptr))))
= { (func_ptr) (-1) };
#else
STATIC func_ptr __DTOR_LIST__[1]
__attribute__((section(".dtors"), aligned(sizeof(func_ptr))))
= { (func_ptr) (-1) };
#endif /* __DTOR_LIST__ alternatives */
#ifdef EH_FRAME_SECTION_NAME
/* Stick a label at the beginning of the frame unwind info so we can register
and deregister it with the exception handling library code. */
#ifdef INIT_SECTION_ASM_OP
STATIC
#endif
char __EH_FRAME_BEGIN__[]
__attribute__((section(EH_FRAME_SECTION_NAME), aligned(4)))
= { };
#endif /* EH_FRAME_SECTION_NAME */
#ifdef JCR_SECTION_NAME
/* Stick a label at the beginning of the java class registration info
so we can register them properly. */
STATIC void *__JCR_LIST__[]
__attribute__ ((unused, section(JCR_SECTION_NAME), aligned(sizeof(void*))))
= { };
#endif /* JCR_SECTION_NAME */
#ifdef OBJECT_FORMAT_ELF
/* Declare the __dso_handle variable. It should have a unique value
@ -162,8 +228,6 @@ extern void __cxa_finalize (void *) TARGET_ATTRIBUTE_WEAK;
the list we left off processing, and we resume at that point,
should we be re-invoked. */
static char __EH_FRAME_BEGIN__[];
static func_ptr __DTOR_LIST__[];
static void
__do_global_dtors_aux (void)
{
@ -214,7 +278,7 @@ fini_dummy (void)
asm (TEXT_SECTION_ASM_OP);
}
#ifdef EH_FRAME_SECTION_NAME
#if defined(EH_FRAME_SECTION_NAME) || defined(JCR_SECTION_NAME)
/* Stick a call to __register_frame_info into the .init section. For some
reason calls with no arguments work more reliably in .init, so stick the
call in another function. */
@ -222,6 +286,7 @@ fini_dummy (void)
static void
frame_dummy (void)
{
#ifdef EH_FRAME_SECTION_NAME
static struct object object;
#if defined(CRT_GET_RFIB_TEXT) || defined(CRT_GET_RFIB_DATA)
void *tbase, *dbase;
@ -241,6 +306,11 @@ frame_dummy (void)
if (__register_frame_info)
__register_frame_info (__EH_FRAME_BEGIN__, &object);
#endif
#endif /* EH_FRAME_SECTION_NAME */
#ifdef JCR_SECTION_NAME
if (__JCR_LIST__[0] && _Jv_RegisterClasses)
_Jv_RegisterClasses (__JCR_LIST__);
#endif /* JCR_SECTION_NAME */
}
static void __attribute__ ((__unused__))
@ -253,7 +323,7 @@ init_dummy (void)
#endif
asm (TEXT_SECTION_ASM_OP);
}
#endif /* EH_FRAME_SECTION_NAME */
#endif /* EH_FRAME_SECTION_NAME || JCR_SECTION_NAME */
#else /* OBJECT_FORMAT_ELF */
@ -308,15 +378,13 @@ __do_global_ctors_aux (void) /* prologue goes in .init section */
#endif /* OBJECT_FORMAT_ELF */
#else /* defined(INIT_SECTION_ASM_OP) */
#else /* INIT_SECTION_ASM_OP */
#ifdef HAS_INIT_SECTION
/* This case is used by the Irix 6 port, which supports named sections but
not an SVR4-style .fini section. __do_global_dtors can be non-static
in this case because we protect it with -hidden_symbol. */
static char __EH_FRAME_BEGIN__[];
static func_ptr __DTOR_LIST__[];
void
__do_global_dtors (void)
{
@ -330,88 +398,27 @@ __do_global_dtors (void)
#endif
}
#ifdef EH_FRAME_SECTION_NAME
#if defined(EH_FRAME_SECTION_NAME) || defined(JCR_SECTION_NAME)
/* Define a function here to call __register_frame. crtend.o is linked in
after libgcc.a, and hence can't call libgcc.a functions directly. That
can lead to unresolved function references. */
void
__frame_dummy (void)
{
#ifdef EH_FRAME_SECTION_NAME
static struct object object;
if (__register_frame_info)
__register_frame_info (__EH_FRAME_BEGIN__, &object);
}
#endif
#endif
#endif /* defined(INIT_SECTION_ASM_OP) */
/* NOTE: In order to be able to support SVR4 shared libraries, we arrange
to have one set of symbols { __CTOR_LIST__, __DTOR_LIST__, __CTOR_END__,
__DTOR_END__ } per root executable and also one set of these symbols
per shared library. So in any given whole process image, we may have
multiple definitions of each of these symbols. In order to prevent
these definitions from conflicting with one another, and in order to
ensure that the proper lists are used for the initialization/finalization
of each individual shared library (respectively), we give these symbols
only internal (i.e. `static') linkage, and we also make it a point to
refer to only the __CTOR_END__ symbol in crtend.o and the __DTOR_LIST__
symbol in crtbegin.o, where they are defined. */
/* The -1 is a flag to __do_global_[cd]tors indicating that this table
does not start with a count of elements. */
#ifdef CTOR_LIST_BEGIN
CTOR_LIST_BEGIN;
#elif defined(CTORS_SECTION_ASM_OP)
/* Hack: force cc1 to switch to .data section early, so that assembling
__CTOR_LIST__ does not undo our behind-the-back change to .ctors. */
static func_ptr force_to_data[1] __attribute__ ((__unused__)) = { };
asm (CTORS_SECTION_ASM_OP);
STATIC func_ptr __CTOR_LIST__[1]
__attribute__ ((__unused__, aligned(sizeof(func_ptr))))
= { (func_ptr) (-1) };
#else
STATIC func_ptr __CTOR_LIST__[1]
__attribute__ ((__unused__, section(".ctors"), aligned(sizeof(func_ptr))))
= { (func_ptr) (-1) };
#endif
#ifdef DTOR_LIST_BEGIN
DTOR_LIST_BEGIN;
#elif defined(DTORS_SECTION_ASM_OP)
asm (DTORS_SECTION_ASM_OP);
STATIC func_ptr __DTOR_LIST__[1]
__attribute__ ((aligned(sizeof(func_ptr))))
= { (func_ptr) (-1) };
#else
STATIC func_ptr __DTOR_LIST__[1]
__attribute__((section(".dtors"), aligned(sizeof(func_ptr))))
= { (func_ptr) (-1) };
#endif
#ifdef EH_FRAME_SECTION_NAME
/* Stick a label at the beginning of the frame unwind info so we can register
and deregister it with the exception handling library code. */
#ifdef INIT_SECTION_ASM_OP
STATIC
#endif
char __EH_FRAME_BEGIN__[]
__attribute__((section(EH_FRAME_SECTION_NAME), aligned(4)))
= { };
#endif /* EH_FRAME_SECTION_NAME */
#ifdef JCR_SECTION_NAME
/* Stick a label at the beginning of the java class registration info
so we can register them properly. */
STATIC void *__JCR_LIST__[]
__attribute__ ((unused, section(JCR_SECTION_NAME), aligned(sizeof(func_ptr))))
= { 0 };
#endif /* JCR_SECTION_NAME */
if (__JCR_LIST__[0] && _Jv_RegisterClasses)
_Jv_RegisterClasses (__JCR_LIST__);
#endif
}
#endif /* EH_FRAME_SECTION_NAME || JCR_SECTION_NAME */
#endif /* HAS_INIT_SECTION */
#endif /* INIT_SECTION_ASM_OP */
#endif /* defined(CRT_BEGIN) */
#ifdef CRT_END
@ -420,25 +427,11 @@ STATIC void *__JCR_LIST__[]
#ifdef OBJECT_FORMAT_ELF
#ifdef JCR_SECTION_NAME
extern void _Jv_RegisterClasses (void *) __attribute__((weak));
static void *__JCR_END__[];
#endif
static func_ptr __CTOR_END__[];
static void
__do_global_ctors_aux (void)
{
func_ptr *p;
#ifdef JCR_SECTION_NAME
void **jcr;
if (_Jv_RegisterClasses)
{
for (jcr = __JCR_END__ - 1; *jcr != NULL; jcr--);
if (*(jcr + 1))
_Jv_RegisterClasses (jcr + 1);
}
#endif
for (p = __CTOR_END__ - 1; *p != (func_ptr) -1; p--)
(*p) ();
}
@ -505,14 +498,12 @@ asm (TEXT_SECTION_ASM_OP);
not an SVR4-style .init section. __do_global_ctors can be non-static
in this case because we protect it with -hidden_symbol. */
static func_ptr __CTOR_END__[];
#ifdef EH_FRAME_SECTION_NAME
extern void __frame_dummy (void);
#endif
void
__do_global_ctors (void)
{
func_ptr *p;
#ifdef EH_FRAME_SECTION_NAME
#if defind(EH_FRAME_SECTION_NAME) || defined(JCR_SECTION_NAME)
__frame_dummy ();
#endif
for (p = __CTOR_END__ - 1; *p != (func_ptr) -1; p--)