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Remove _global_impure_ptr indirection

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Remove the pointer indirection through the read-only _global_impure_ptr and
directly use a externally visible _impure_data object of type struct _reent.
This enables the static initialization of global data structures in a follow up
patch.  In addition, we get rid of a machine-specific file.
This commit is contained in:
Sebastian Huber 2022-05-03 14:51:55 +02:00
parent 357d7fcc6a
commit ad51d0006a
7 changed files with 13 additions and 52 deletions
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21
newlib/Makefile.in
View File

@ -816,7 +816,7 @@ check_PROGRAMS =
@HAVE_LIBC_MACHINE_SPU_TRUE@ libc/machine/spu/ferror.c libc/machine/spu/fflush.c libc/machine/spu/fgetc.c libc/machine/spu/fgetpos.c libc/machine/spu/fgets.c libc/machine/spu/fileno.c libc/machine/spu/fiprintf.S \
@HAVE_LIBC_MACHINE_SPU_TRUE@ libc/machine/spu/fiscanf.S libc/machine/spu/fopen.c libc/machine/spu/fprintf.S libc/machine/spu/fputc.c libc/machine/spu/fputs.c libc/machine/spu/fread.c libc/machine/spu/freopen.c \
@HAVE_LIBC_MACHINE_SPU_TRUE@ libc/machine/spu/fscanf.S libc/machine/spu/fseek.c libc/machine/spu/fsetpos.c libc/machine/spu/ftell.c libc/machine/spu/fwrite.c libc/machine/spu/getc.c libc/machine/spu/getchar.c \
@HAVE_LIBC_MACHINE_SPU_TRUE@ libc/machine/spu/gets.c libc/machine/spu/impure.c libc/machine/spu/iprintf.S libc/machine/spu/iscanf.S libc/machine/spu/memcmp.c libc/machine/spu/memcpy.c libc/machine/spu/memmove.c \
@HAVE_LIBC_MACHINE_SPU_TRUE@ libc/machine/spu/gets.c libc/machine/spu/iprintf.S libc/machine/spu/iscanf.S libc/machine/spu/memcmp.c libc/machine/spu/memcpy.c libc/machine/spu/memmove.c \
@HAVE_LIBC_MACHINE_SPU_TRUE@ libc/machine/spu/memset.c libc/machine/spu/perror.c libc/machine/spu/printf.S libc/machine/spu/putc.c libc/machine/spu/putchar.c libc/machine/spu/puts.c libc/machine/spu/remove.c \
@HAVE_LIBC_MACHINE_SPU_TRUE@ libc/machine/spu/rename.c libc/machine/spu/rewind.c libc/machine/spu/scanf.S libc/machine/spu/setbuf.c libc/machine/spu/setvbuf.c libc/machine/spu/siprintf.S libc/machine/spu/siscanf.S \
@HAVE_LIBC_MACHINE_SPU_TRUE@ libc/machine/spu/sleep.c libc/machine/spu/sniprintf.S libc/machine/spu/snprintf.S libc/machine/spu/sprintf.S libc/machine/spu/sscanf.S libc/machine/spu/stdio.c libc/machine/spu/strcat.c \
@ -2131,7 +2131,6 @@ am__objects_51 = libc/ssp/libc_a-chk_fail.$(OBJEXT) \
@HAVE_LIBC_MACHINE_SPU_TRUE@ libc/machine/spu/libc_a-getc.$(OBJEXT) \
@HAVE_LIBC_MACHINE_SPU_TRUE@ libc/machine/spu/libc_a-getchar.$(OBJEXT) \
@HAVE_LIBC_MACHINE_SPU_TRUE@ libc/machine/spu/libc_a-gets.$(OBJEXT) \
@HAVE_LIBC_MACHINE_SPU_TRUE@ libc/machine/spu/libc_a-impure.$(OBJEXT) \
@HAVE_LIBC_MACHINE_SPU_TRUE@ libc/machine/spu/libc_a-iprintf.$(OBJEXT) \
@HAVE_LIBC_MACHINE_SPU_TRUE@ libc/machine/spu/libc_a-iscanf.$(OBJEXT) \
@HAVE_LIBC_MACHINE_SPU_TRUE@ libc/machine/spu/libc_a-memcmp.$(OBJEXT) \
@ -8812,9 +8811,6 @@ libc/machine/spu/libc_a-getchar.$(OBJEXT): \
libc/machine/spu/libc_a-gets.$(OBJEXT): \
libc/machine/spu/$(am__dirstamp) \
libc/machine/spu/$(DEPDIR)/$(am__dirstamp)
libc/machine/spu/libc_a-impure.$(OBJEXT): \
libc/machine/spu/$(am__dirstamp) \
libc/machine/spu/$(DEPDIR)/$(am__dirstamp)
libc/machine/spu/libc_a-iprintf.$(OBJEXT): \
libc/machine/spu/$(am__dirstamp) \
libc/machine/spu/$(DEPDIR)/$(am__dirstamp)
@ -12121,7 +12117,6 @@ distclean-compile:
@AMDEP_TRUE@@am__include@ @am__quote@libc/machine/spu/$(DEPDIR)/libc_a-getc.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@libc/machine/spu/$(DEPDIR)/libc_a-getchar.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@libc/machine/spu/$(DEPDIR)/libc_a-gets.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@libc/machine/spu/$(DEPDIR)/libc_a-impure.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@libc/machine/spu/$(DEPDIR)/libc_a-iprintf.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@libc/machine/spu/$(DEPDIR)/libc_a-iscanf.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@libc/machine/spu/$(DEPDIR)/libc_a-malloc_ea.Po@am__quote@
@ -33451,20 +33446,6 @@ libc/machine/spu/libc_a-gets.obj: libc/machine/spu/gets.c
@AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
@am__fastdepCC_FALSE@ $(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CFLAGS) $(CFLAGS) -c -o libc/machine/spu/libc_a-gets.obj `if test -f 'libc/machine/spu/gets.c'; then $(CYGPATH_W) 'libc/machine/spu/gets.c'; else $(CYGPATH_W) '$(srcdir)/libc/machine/spu/gets.c'; fi`
libc/machine/spu/libc_a-impure.o: libc/machine/spu/impure.c
@am__fastdepCC_TRUE@ $(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CFLAGS) $(CFLAGS) -MT libc/machine/spu/libc_a-impure.o -MD -MP -MF libc/machine/spu/$(DEPDIR)/libc_a-impure.Tpo -c -o libc/machine/spu/libc_a-impure.o `test -f 'libc/machine/spu/impure.c' || echo '$(srcdir)/'`libc/machine/spu/impure.c
@am__fastdepCC_TRUE@ $(AM_V_at)$(am__mv) libc/machine/spu/$(DEPDIR)/libc_a-impure.Tpo libc/machine/spu/$(DEPDIR)/libc_a-impure.Po
@AMDEP_TRUE@@am__fastdepCC_FALSE@ $(AM_V_CC)source='libc/machine/spu/impure.c' object='libc/machine/spu/libc_a-impure.o' libtool=no @AMDEPBACKSLASH@
@AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
@am__fastdepCC_FALSE@ $(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CFLAGS) $(CFLAGS) -c -o libc/machine/spu/libc_a-impure.o `test -f 'libc/machine/spu/impure.c' || echo '$(srcdir)/'`libc/machine/spu/impure.c
libc/machine/spu/libc_a-impure.obj: libc/machine/spu/impure.c
@am__fastdepCC_TRUE@ $(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CFLAGS) $(CFLAGS) -MT libc/machine/spu/libc_a-impure.obj -MD -MP -MF libc/machine/spu/$(DEPDIR)/libc_a-impure.Tpo -c -o libc/machine/spu/libc_a-impure.obj `if test -f 'libc/machine/spu/impure.c'; then $(CYGPATH_W) 'libc/machine/spu/impure.c'; else $(CYGPATH_W) '$(srcdir)/libc/machine/spu/impure.c'; fi`
@am__fastdepCC_TRUE@ $(AM_V_at)$(am__mv) libc/machine/spu/$(DEPDIR)/libc_a-impure.Tpo libc/machine/spu/$(DEPDIR)/libc_a-impure.Po
@AMDEP_TRUE@@am__fastdepCC_FALSE@ $(AM_V_CC)source='libc/machine/spu/impure.c' object='libc/machine/spu/libc_a-impure.obj' libtool=no @AMDEPBACKSLASH@
@AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
@am__fastdepCC_FALSE@ $(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CFLAGS) $(CFLAGS) -c -o libc/machine/spu/libc_a-impure.obj `if test -f 'libc/machine/spu/impure.c'; then $(CYGPATH_W) 'libc/machine/spu/impure.c'; else $(CYGPATH_W) '$(srcdir)/libc/machine/spu/impure.c'; fi`
libc/machine/spu/libc_a-memcmp.o: libc/machine/spu/memcmp.c
@am__fastdepCC_TRUE@ $(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libc_a_CPPFLAGS) $(CPPFLAGS) $(libc_a_CFLAGS) $(CFLAGS) -MT libc/machine/spu/libc_a-memcmp.o -MD -MP -MF libc/machine/spu/$(DEPDIR)/libc_a-memcmp.Tpo -c -o libc/machine/spu/libc_a-memcmp.o `test -f 'libc/machine/spu/memcmp.c' || echo '$(srcdir)/'`libc/machine/spu/memcmp.c
@am__fastdepCC_TRUE@ $(AM_V_at)$(am__mv) libc/machine/spu/$(DEPDIR)/libc_a-memcmp.Tpo libc/machine/spu/$(DEPDIR)/libc_a-memcmp.Po

9
newlib/libc/include/sys/reent.h
View File

@ -821,7 +821,12 @@ extern __FILE __sf[3];
#endif
extern struct _reent *_impure_ptr __ATTRIBUTE_IMPURE_PTR__;
extern struct _reent *const _global_impure_ptr __ATTRIBUTE_IMPURE_PTR__;
#ifndef __ATTRIBUTE_IMPURE_DATA__
#define __ATTRIBUTE_IMPURE_DATA__
#endif
extern struct _reent _impure_data __ATTRIBUTE_IMPURE_DATA__;
void _reclaim_reent (struct _reent *);
@ -836,7 +841,7 @@ void _reclaim_reent (struct _reent *);
# define _REENT _impure_ptr
#endif /* __SINGLE_THREAD__ || !__DYNAMIC_REENT__ */
#define _GLOBAL_REENT _global_impure_ptr
#define _GLOBAL_REENT (&_impure_data)
#ifdef _REENT_GLOBAL_ATEXIT
extern struct _atexit *_global_atexit; /* points to head of LIFO stack */

2
newlib/libc/machine/spu/Makefile.inc
View File

@ -3,7 +3,7 @@ libc_a_SOURCES += \
%D%/ferror.c %D%/fflush.c %D%/fgetc.c %D%/fgetpos.c %D%/fgets.c %D%/fileno.c %D%/fiprintf.S \
%D%/fiscanf.S %D%/fopen.c %D%/fprintf.S %D%/fputc.c %D%/fputs.c %D%/fread.c %D%/freopen.c \
%D%/fscanf.S %D%/fseek.c %D%/fsetpos.c %D%/ftell.c %D%/fwrite.c %D%/getc.c %D%/getchar.c \
%D%/gets.c %D%/impure.c %D%/iprintf.S %D%/iscanf.S %D%/memcmp.c %D%/memcpy.c %D%/memmove.c \
%D%/gets.c %D%/iprintf.S %D%/iscanf.S %D%/memcmp.c %D%/memcpy.c %D%/memmove.c \
%D%/memset.c %D%/perror.c %D%/printf.S %D%/putc.c %D%/putchar.c %D%/puts.c %D%/remove.c \
%D%/rename.c %D%/rewind.c %D%/scanf.S %D%/setbuf.c %D%/setvbuf.c %D%/siprintf.S %D%/siscanf.S \
%D%/sleep.c %D%/sniprintf.S %D%/snprintf.S %D%/sprintf.S %D%/sscanf.S %D%/stdio.c %D%/strcat.c \

14
newlib/libc/machine/spu/impure.c
View File

@ -1,14 +0,0 @@
#include <reent.h>
/* Note that there is a copy of this in sys/reent.h. */
#ifndef __ATTRIBUTE_IMPURE_PTR__
#define __ATTRIBUTE_IMPURE_PTR__
#endif
#ifndef __ATTRIBUTE_IMPURE_DATA__
#define __ATTRIBUTE_IMPURE_DATA__
#endif
struct _reent __ATTRIBUTE_IMPURE_DATA__ _impure_data = _REENT_INIT(_impure_data);
struct _reent *__ATTRIBUTE_IMPURE_PTR__ _impure_ptr = &_impure_data;
struct _reent *const __ATTRIBUTE_IMPURE_PTR__ _global_impure_ptr = &_impure_data;

1
newlib/libc/machine/spu/sys/errno.h
View File

@ -27,7 +27,6 @@ extern "C" {
#include <sys/reent.h>
extern struct _reent _impure_data;
#define errno (_impure_data._errno)
/* Please don't use these variables directly.

16
newlib/libc/reent/impure.c
View File

@ -1,14 +1,5 @@
#include <reent.h>
/* Note that there is a copy of this in sys/reent.h. */
#ifndef __ATTRIBUTE_IMPURE_PTR__
#define __ATTRIBUTE_IMPURE_PTR__
#endif
#ifndef __ATTRIBUTE_IMPURE_DATA__
#define __ATTRIBUTE_IMPURE_DATA__
#endif
/* Redeclare these symbols locally as weak so that the file containing
their definitions (along with a lot of other stuff) isn't sucked in
unless they are actually used by other compilation units. This is
@ -20,9 +11,8 @@ extern const struct __sFILE_fake __sf_fake_stdout _ATTRIBUTE ((weak));
extern const struct __sFILE_fake __sf_fake_stderr _ATTRIBUTE ((weak));
#endif
static struct _reent __ATTRIBUTE_IMPURE_DATA__ impure_data = _REENT_INIT (impure_data);
struct _reent __ATTRIBUTE_IMPURE_DATA__ _impure_data = _REENT_INIT (_impure_data);
#ifdef __CYGWIN__
extern struct _reent reent_data __attribute__ ((alias("impure_data")));
extern struct _reent reent_data __attribute__ ((alias("_impure_data")));
#endif
struct _reent *__ATTRIBUTE_IMPURE_PTR__ _impure_ptr = &impure_data;
struct _reent *const __ATTRIBUTE_IMPURE_PTR__ _global_impure_ptr = &impure_data;
struct _reent *__ATTRIBUTE_IMPURE_PTR__ _impure_ptr = &_impure_data;

2
winsup/cygwin/dcrt0.cc
View File

@ -816,7 +816,7 @@ static inline void
main_thread_sinit ()
{
__sinit (_impure_ptr);
/* At this point, _impure_ptr == _global_impure_ptr == _GLOBAL_REENT is
/* At this point, _impure_ptr == _GLOBAL_REENT is
initialized, but _REENT == _my_tls.local_clib doesn't know about it.
It has been copied over from _GLOBAL_REENT in _cygtls::init_thread
*before* the initialization took place.