Commit Graph

22 Commits

Author SHA1 Message Date
Alexander Fedotov dfffe68303 Align libgloss/arm and libc/sys/arm sources: HeapInfo and __heap_limit
Applied changes from commit 8d98f95:

	* arm/crt0.S: Initialise __heap_limit when ARM_RDI_MONITOR is defined.
	* arm/syscalls.c: define __heap_limit global symbol.
	* arm/syscalls.c (_sbrk): Honour __heap_limit.

Applied changes from commit 8d98f95:
	Fixed semihosting for ARM when heapinfo not provided by debugger
2019-08-05 13:00:53 +01:00
Alexander Fedotov 37e80fbb1c Align libgloss/arm and libc/sys/arm sources: Fix GetCmdLine semihosting directives
Applied changes from the commit 9b11672:

	When simulating arm code, the target program startup code (crt0) uses
	semihosting invocations to get the command line from the simulator. The
	simulator returns the command line and its size into the area passed in
	parameter. (ARM 32-bit specifications :
	http://infocenter.arm.com/help/topic/com.arm.doc.dui0058d/DUI0058.pdf
	chapter "5.4.19 SYS_GET_CMDLINE").

	The memory area pointed by the semihosting register argument is located
	in .text section (usually not writtable (RX)).

	If we run this code on a simulator that respects this rights properties
	(qemu user-mode for instance), the command line will not be written to
	the .text program memory, in particular the length of the string. The
	program runs with an empty command line. This problem hasn't been seen
	earlier probably because qemu user-mode is not so much used, but this can
	happen with another simulator that refuse to write in a read-only segment.

	With this modification, the command line can be correctly passed to the
	target program.

	Changes:
	- newlib/libc/sys/arm/crt0.S : Arguments passed to the
	AngelSWI_Reason_GetCmdLine semihosting invocation are placed into .data
	section instead of .text
2019-08-05 13:00:53 +01:00
Alexander Fedotov 942f60d714 Stack Pointer and Stack Limit initialization refactored.
SP initialization changes:
  1. set default value in semihosting case as well
  2. moved existing SP & SL init code for processor modes in separate routine and made it as "hook"
  3. init SP for processor modes in Thumb mode as well

Add new macro FN_RETURN, FN_EH_START and FN_EH_END.
2019-07-23 10:00:06 +02:00
Alexander Fedotov a0b0a4a018 Align comments and spaces in libgloss/arm/crt0.S and newlib/libc/sys/arm/crt0.S to ease further code alignment. 2019-04-12 14:34:47 +01:00
Christophe Lyon 630808d2a2 Make more macro checks ARMv8-M baseline proof.
Commit 69f4c40291 improved most
macro checks to be ARMv8-M baseline proof, but missed a few
occurrences which otherwise fail to build when using a CPU setting
such as cortex-m0 or cortex-m23. This patch brings the same
changes as the ones that were committed to libgloss at that time.

	newlib:
	* libc/sys/arm/crt0.S: Use THUMB1_ONLY rather than
	__ARM_ARCH_6M__.
2019-04-11 14:20:21 +00:00
Thomas Preud'homme 69f4c40291 Make macro checks ARMv8-M baseline proof
libgloss:

        * arm/Makefile.in: Add newlib/libc/machine/arm to the include path if
        newlib is present.
        * arm/arm.h: Include acle-compat.h.
        (THUMB_V7_V6M): Rename to ...
        (PREFER_THUMB): This.  Use ACLE macros __ARM_ARCH_ISA_ARM instead of
        __ARM_ARCH_6M__ to decide whether to define it.
        (THUMB1_ONLY): Define for Thumb-1 only targets.
        (THUMB_V7M_V6M): Rename to ...
        (THUMB_VXM): This.  Defined based on __ARM_ARCH_ISA_ARM, excluding
        ARMv7.
        * arm/crt0.S: Use THUMB1_ONLY rather than __ARM_ARCH_6M__,
        !__ARM_ARCH_ISA_ARM rather than THUMB_V7M_V6M for fp enabling, and
        PREFER_THUMB rather than THUMB_V7_V6M.  Rename other occurences of
        THUMB_V7M_V6M to THUMB_VXM.
        * arm/linux-crt0.c: Likewise.
        * arm/redboot-crt0.S: Likewise.
        * arm/swi.h: Likewise.
        * arm/trap.S: Likewise.

newlib:

        * libc/machine/arm/memcpy-stub.c: Use ACLE macros __ARM_ARCH_ISA_THUMB
        and __ARM_ARCH_ISA_ARM to check for Thumb-2 only targets rather than
        __ARM_ARCH and __ARM_ARCH_PROFILE.
        * libc/machine/arm/memcpy.S: Likewise.
        * libc/machine/arm/setjmp.S: Likewise for Thumb-1 only target and
        include acle-compat.h.
        * libc/machine/arm/strcmp.S: Likewise for Thumb-1 and Thumb-2 only
        target and include acle-compat.h.
        * libc/sys/arm/arm.h: Include acle-compat.h.
        (THUMB_V7_V6M): Rename to ...
        (PREFER_THUMB): This.  Use ACLE macro __ARM_ARCH_ISA_ARM instead of
        __ARM_ARCH_6M__ to decide whether to define it.
        (THUMB1_ONLY): Define for Thumb-1 only targets.
        (THUMB_V7M_V6M): Rename to ...
        (THUMB_VXM): This.  Defined based on __ARM_ARCH_ISA_ARM, excluding
        ARMv7.
        * libc/sys/arm/crt0.S: Use PREFER_THUMB rather than THUMB_V7_V6M and
        rename THUMB_V7M_V6M into THUMB_VXM.
        * libc/sys/arm/swi.h: Likewise.
2016-01-28 11:26:37 +01:00
Corinna Vinschen 454b880298 * libc/sys/arm/crt0.S: Remove 'start'. 2013-08-12 11:28:28 +00:00
Jeff Johnston e480bc80c3 2011-12-13 Richard Earnshaw <rearnsha@arm.com>
Thomas Klein  <th.r.klein@web.de>

        * libc/sys/arm/crt0.S: Manually set the target architecture
        when compiling for Thumb1 on EABI targets.
        Don't use SWI on M-profile cores.
        Avoid v6-only Thumb-1 MOV instruction.
2011-12-13 22:40:45 +00:00
Nick Clifton eefc33184a oops - fix typo in previous delta. 2011-10-11 09:29:56 +00:00
Nick Clifton fa5c739c6e oops - omitted from previous delta. 2011-10-11 07:38:33 +00:00
Jeff Johnston 9bbe6d5d28 2006-02-07 Paul Brook <paul@codesourcery.com>
* libc/machine/arm/setjmp.S: Add Thumb-2 support.
        * libc/sys/arm/crt0.S: Add Thumb-2 startup code.
        * libc/sys/arm/libcfunc.c (do_AngelSWI): Use AngelSWIInsn.
        * libc/sys/arm/swi.h (AngelSWIInsn, AngelSWIAsm): Define.
        * libc/sys/arm/trap.S: Disable for Thumb-2.
2006-02-07 18:44:54 +00:00
Jeff Johnston 108d7dd833 2005-07-19 Paul Brook <paul@codesourcery.com>
* libc/sys/arm/crt0.S: Ensure doubleword stack alignment.
2005-07-19 15:14:16 +00:00
Jeff Johnston f7a74742e6 2005-01-07 Paul Brook <paul@codesourcery.com>
* configure.in: Add test for .init_array.
        * configure: Regenerate.
        * newlib.hin: Add HAVE_INITFINI_ARRAY.
        * libc/misc/Makefile.am: Add init.c
        * libc/misc/Makefile.in: Regenerate.
        * libc/misc/init.c: New file.
        * libc/sys/arm/crt0.S: Call __libc_{init,fini}_array instead of
        _init/_fini if they exist.
2005-01-07 18:04:39 +00:00
Jeff Johnston a330d85a45 2004-11-26 Paul Brook <paul@codesourcery.com>
* libc/sys/arm/crt0.S (_start): Add .cantunwind annotation.
2004-11-26 16:42:10 +00:00
Nick Clifton 1f176167c5 Fix bugs in previous delta 2002-11-18 16:30:55 +00:00
Nick Clifton 28ecb2f58e Add NULL to end of argv array. 2002-11-18 15:21:24 +00:00
Thomas Fitzsimmons bfc27bae1a * Various formatting and whitespace changes. 2002-04-30 18:23:40 +00:00
Nick Clifton e9853806c7 For __USES_INITFINI__ preserve the argument vector before calling the
initialisation functions.
2001-12-05 11:51:43 +00:00
Anthony Green 28f8744e02 Add __stack_base__ 2001-11-13 03:31:14 +00:00
Nick Clifton b244a68909 oops omitted in previous delta 2001-09-18 15:42:41 +00:00
Jeff Johnston ba2048d3ca Wed Jun 28 14:08:00 2000 Keith Walker <keith.walker@arm.com>
* libc/sys/arm/crt0.S (.LC30): Added missing length parameter
        to argument list for AngelSWI_Reason_GetCmdLine.
2000-06-28 18:14:14 +00:00
Christopher Faylor 8a0efa53e4 import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00