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newlib-cygwin/newlib/libc/sys/h8300hms/crt0.S

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import newlib-2000-02-17 snapshot
2000-02-17 19:39:52 +00:00
; h8/300 and h8/300h start up file.
* libc/sys/h8300hms/setarch.h: New file. * libc/sys/h8300hms/close.S, libc/sys/h8300hms/fstat.S, libc/sys/h8300hms/lseek.S, libc/sys/h8300hms/open.S, libc/sys/h8300hms/read.S, libc/sys/h8300hms/stat.S, libc/sys/h8300hms/write.S, libc/sys/h8300hms/crt0.S: Use it.
2003-06-10 07:44:30 +00:00
#include "setarch.h"
import newlib-2000-02-17 snapshot
2000-02-17 19:39:52 +00:00
#ifdef __H8300__
.section .text
.global _start
_start:
mov.w #_stack,sp
mov.w #_edata,r0
Minor improvement to H8 startup code Basically the startup code needs to clear memory from _edata to _end. In the past it's been done with a fairly naive copy loop. This changes the code to just call memset and let memset figure out a sensible way to handle the operation given the size and alignment requirements. I don't have performance data on this. I cobbled it together some time ago in response to seeing some of the GCC tests with larger .bss sections taking an insane amount of time to just get from _start to main. With the fixes to the H8 decoder in the simulator it may not matter nearly as much anymore. This has been in my tester for months. Naturally it does not cause any regressions in the H8 port.
2023-12-31 09:08:21 -07:00
mov.w #_end,r2
sub.w r1,r1
sub.w r0,r2
jsr @_memset
2001-09-04 Jason Merrill <jason_merrill@redhat.com> * libc/sys/h8300hms/crt0.S: Support ELF initialization.
2001-09-04 19:05:44 +00:00
#ifdef __ELF__
2001-09-07 Jeff Law <law@redhat.com> * libc/sys/h8300hms/crt0.S: For H8/300H and H8/S, load address of __fini with "mov.l" instead of "mov.w".
2001-09-07 18:21:33 +00:00
mov.l #__fini,r0
2001-09-04 Jason Merrill <jason_merrill@redhat.com> * libc/sys/h8300hms/crt0.S: Support ELF initialization.
2001-09-04 19:05:44 +00:00
jsr @_atexit
2003-03-18 D.Venkatasubramanian <dvenkat@noida.hcltech.com> * libc/include/sys/h8300hms/crt0.S[__SIMULATOR__]: Add commandline support. * configure.host (h8300*-*-*): Added comment regarding -D__SIMULATOR__ flag to support simulator only extensions.
2003-03-18 20:38:04 +00:00
#ifdef __SIMULATOR__
jsr @0xcc
#endif
2001-09-04 Jason Merrill <jason_merrill@redhat.com> * libc/sys/h8300hms/crt0.S: Support ELF initialization.
2001-09-04 19:05:44 +00:00
jsr @__init
#else
2003-03-18 D.Venkatasubramanian <dvenkat@noida.hcltech.com> * libc/include/sys/h8300hms/crt0.S[__SIMULATOR__]: Add commandline support. * configure.host (h8300*-*-*): Added comment regarding -D__SIMULATOR__ flag to support simulator only extensions.
2003-03-18 20:38:04 +00:00
#ifdef __SIMULATOR__
jsr @0xcc
#endif
import newlib-2000-02-17 snapshot
2000-02-17 19:39:52 +00:00
jsr @___main
2001-09-04 Jason Merrill <jason_merrill@redhat.com> * libc/sys/h8300hms/crt0.S: Support ELF initialization.
2001-09-04 19:05:44 +00:00
#endif
import newlib-2000-02-17 snapshot
2000-02-17 19:39:52 +00:00
jsr @_main
jsr @_exit
.section .stack
_stack: .word 1
#endif
#ifdef __H8300H__
.section .text
.global _start
_start:
mov.l #_stack,sp
mov.l #_edata,er0
Minor improvement to H8 startup code Basically the startup code needs to clear memory from _edata to _end. In the past it's been done with a fairly naive copy loop. This changes the code to just call memset and let memset figure out a sensible way to handle the operation given the size and alignment requirements. I don't have performance data on this. I cobbled it together some time ago in response to seeing some of the GCC tests with larger .bss sections taking an insane amount of time to just get from _start to main. With the fixes to the H8 decoder in the simulator it may not matter nearly as much anymore. This has been in my tester for months. Naturally it does not cause any regressions in the H8 port.
2023-12-31 09:08:21 -07:00
mov.l #_end,er2
sub.w r1,r1
sub.l er0,er2
jsr @_memset
2001-09-04 Jason Merrill <jason_merrill@redhat.com> * libc/sys/h8300hms/crt0.S: Support ELF initialization.
2001-09-04 19:05:44 +00:00
#ifdef __ELF__
* libc/sys/h8300hms/crt0.S (_start): Fix register sizes in call to atexit().
2003-06-24 18:13:35 +00:00
mov.l #__fini,er0
2001-09-04 Jason Merrill <jason_merrill@redhat.com> * libc/sys/h8300hms/crt0.S: Support ELF initialization.
2001-09-04 19:05:44 +00:00
jsr @_atexit
2003-03-18 D.Venkatasubramanian <dvenkat@noida.hcltech.com> * libc/include/sys/h8300hms/crt0.S[__SIMULATOR__]: Add commandline support. * configure.host (h8300*-*-*): Added comment regarding -D__SIMULATOR__ flag to support simulator only extensions.
2003-03-18 20:38:04 +00:00
#ifdef __SIMULATOR__
jsr @0xcc
#endif
2001-09-04 Jason Merrill <jason_merrill@redhat.com> * libc/sys/h8300hms/crt0.S: Support ELF initialization.
2001-09-04 19:05:44 +00:00
jsr @__init
#else
2003-03-18 D.Venkatasubramanian <dvenkat@noida.hcltech.com> * libc/include/sys/h8300hms/crt0.S[__SIMULATOR__]: Add commandline support. * configure.host (h8300*-*-*): Added comment regarding -D__SIMULATOR__ flag to support simulator only extensions.
2003-03-18 20:38:04 +00:00
#ifdef __SIMULATOR__
jsr @0xcc
#endif
import newlib-2000-02-17 snapshot
2000-02-17 19:39:52 +00:00
jsr @___main
2001-09-04 Jason Merrill <jason_merrill@redhat.com> * libc/sys/h8300hms/crt0.S: Support ELF initialization.
2001-09-04 19:05:44 +00:00
#endif
import newlib-2000-02-17 snapshot
2000-02-17 19:39:52 +00:00
jsr @_main
jsr @_exit
.section .stack
_stack: .long 1
#endif
2003-07-02 Richard Sandiford <rsandifo@redhat.com> * libc/machine/h8300/Makefile.am (lib_a_SOURCES): Add h8sx_strcpy.S. * libc/machine/h8300/defines.h (LEN): New macro. * libc/machine/h8300/memcpy.S: Add h8sx version. * libc/machine/h8300/memset.S: Likewise. * libc/machine/h8300/strcmp.S: Likewise. * libc/machine/h8300/setjmp.S: Use h8sx move instructions. * libc/machine/h8300/h8sx_strcpy.S: New file. 2003-06-30 Richard Sandiford <rsandifo@redhat.com> * libc/include/machine/ieeefp.h: Extend __H8300S__ handling to __H8300SX__. * libc/include/machine/setjmp.h: Likewise. * libc/include/sys/config.h: Likewise. * libc/machine/h8300/defines.h: Likewise. * libc/machine/h8300/setjmp.S: Likewise. * libc/machine/h8300/strcmp.S: Likewise. * libc/sys/h8300hms/close.S: Likewise. * libc/sys/h8300hms/fstat.S: Likewise. * libc/sys/h8300hms/lseek.S: Likewise. * libc/sys/h8300hms/read.S: Likewise. * libc/sys/h8300hms/write.S: Likewise. * libc/sys/h8300hms/crt0.S: Likewise. * libc/machine/h8300/setarch.h: Use .h8300sx or .h8300sxn if __H8300SX__ is defined. * libc/sys/h8300hms/setarch.h: Likewise.
2004-06-22 21:54:52 +00:00
#if defined (__H8300S__) || defined (__H8300SX__)
* libc/sys/h8300hms/setarch.h: New file. * libc/sys/h8300hms/close.S, libc/sys/h8300hms/fstat.S, libc/sys/h8300hms/lseek.S, libc/sys/h8300hms/open.S, libc/sys/h8300hms/read.S, libc/sys/h8300hms/stat.S, libc/sys/h8300hms/write.S, libc/sys/h8300hms/crt0.S: Use it.
2003-06-10 07:44:30 +00:00
import newlib-2000-02-17 snapshot
2000-02-17 19:39:52 +00:00
.section .text
.global _start
_start:
mov.l #_stack,sp
mov.l #_edata,er0
Minor improvement to H8 startup code Basically the startup code needs to clear memory from _edata to _end. In the past it's been done with a fairly naive copy loop. This changes the code to just call memset and let memset figure out a sensible way to handle the operation given the size and alignment requirements. I don't have performance data on this. I cobbled it together some time ago in response to seeing some of the GCC tests with larger .bss sections taking an insane amount of time to just get from _start to main. With the fixes to the H8 decoder in the simulator it may not matter nearly as much anymore. This has been in my tester for months. Naturally it does not cause any regressions in the H8 port.
2023-12-31 09:08:21 -07:00
mov.l #_end,er2
sub.w r1,r1
sub.l er0,er2
jsr @_memset
2001-09-04 Jason Merrill <jason_merrill@redhat.com> * libc/sys/h8300hms/crt0.S: Support ELF initialization.
2001-09-04 19:05:44 +00:00
#ifdef __ELF__
* libc/sys/h8300hms/crt0.S (_start): Fix register sizes in call to atexit().
2003-06-24 18:13:35 +00:00
mov.l #__fini,er0
2001-09-04 Jason Merrill <jason_merrill@redhat.com> * libc/sys/h8300hms/crt0.S: Support ELF initialization.
2001-09-04 19:05:44 +00:00
jsr @_atexit
2003-03-18 D.Venkatasubramanian <dvenkat@noida.hcltech.com> * libc/include/sys/h8300hms/crt0.S[__SIMULATOR__]: Add commandline support. * configure.host (h8300*-*-*): Added comment regarding -D__SIMULATOR__ flag to support simulator only extensions.
2003-03-18 20:38:04 +00:00
#ifdef __SIMULATOR__
jsr @0xcc
#endif
2001-09-04 Jason Merrill <jason_merrill@redhat.com> * libc/sys/h8300hms/crt0.S: Support ELF initialization.
2001-09-04 19:05:44 +00:00
jsr @__init
#else
2003-03-18 D.Venkatasubramanian <dvenkat@noida.hcltech.com> * libc/include/sys/h8300hms/crt0.S[__SIMULATOR__]: Add commandline support. * configure.host (h8300*-*-*): Added comment regarding -D__SIMULATOR__ flag to support simulator only extensions.
2003-03-18 20:38:04 +00:00
#ifdef __SIMULATOR__
jsr @0xcc
#endif
import newlib-2000-02-17 snapshot
2000-02-17 19:39:52 +00:00
jsr @___main
2001-09-04 Jason Merrill <jason_merrill@redhat.com> * libc/sys/h8300hms/crt0.S: Support ELF initialization.
2001-09-04 19:05:44 +00:00
#endif
import newlib-2000-02-17 snapshot
2000-02-17 19:39:52 +00:00
jsr @_main
jsr @_exit
.section .stack
_stack: .long 1
#endif
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