* microblaze/Makefile.in: Add LINUX_BSP.
* microblaze/elf-gloss-linux.ld: New file.
* microblaze/elf-gloss-linux.specs: Likewise.
* microblaze/linux-crt0.S: Likewise.
* microblaze/linux-inbyte.c: Likewise.
* microblaze/linux-outbyte.c: Likewise.
* microblaze/linux-syscalls-wrap.c: Likewise.
* microblaze/linux-syscalls.S: Likewise.
* microblaze/linux-syscalls.h: Likewise.
+2013-07-23 Nagaraju Mekala <nagaraju.mekala@xilinx.com>
+
+ * microblaze/_exception_handler.S: Adjust to be weak.
+
+2013-07-23 Edgar E. Iglesias <edgar.iglesias@xilinx.com>
+
+ * microblaze/Makefile.in: Add LINUX_BSP.
+ * microblaze/elf-gloss-linux.ld: New file.
+ * microblaze/elf-gloss-linux.specs: Likewise.
+ * microblaze/linux-crt0.S: Likewise.
+ * microblaze/linux-inbyte.c: Likewise.
+ * microblaze/linux-outbyte.c: Likewise.
+ * microblaze/linux-syscalls-wrap.c: Likewise.
+ * microblaze/linux-syscalls.S: Likewise.
+ * microblaze/linux-syscalls.h: Likewise.
+
2013-07-17 Yaakov Selkowitz <yselkowitz@users.sourceforge.net>
* lm32/configure: Regenerate.
xil_malloc.o xil_sbrk.o xil_printf.o
SCRIPTS = xilinx.ld
+# Tiny Linux BSP.
+LINUX_BSP = libgloss-linux.a
+CRT += linux-crt0.o
+LINUX_OBJS = linux-syscalls.o linux-syscalls-wrap.o
+LINUX_OBJS += linux-outbyte.o linux-inbyte.o
+LINUX_SCRIPTS = elf-gloss-linux.specs
+
CPU = @CPU@
#### Host specific Makefile fragment comes in here.
@host_makefile_frag@
-all: ${CRT} ${LIB}
+all: ${CRT} ${LIB} ${LINUX_BSP}
-install: ${CRT} ${LIB}
+install: ${CRT} ${LIB} install-linux
@for crt in ${CRT}; do \
$(INSTALL_PROGRAM) $${crt} $(DESTDIR)$(tooldir)/lib${MULTISUBDIR}/$${crt}; \
done
$(INSTALL_PROGRAM) ${LIB} $(DESTDIR)$(tooldir)/lib${MULTISUBDIR}
$(INSTALL_PROGRAM) $(srcdir)/${SCRIPTS} $(DESTDIR)$(tooldir)/lib/
+install-linux: ${LINUX_BSP}
+ $(INSTALL_PROGRAM) ${LINUX_BSP} $(DESTDIR)$(tooldir)/lib${MULTISUBDIR}
+ set -e; for x in ${LINUX_SCRIPTS}; do ${INSTALL_DATA} ${srcdir}/${objtype}$$x $(DESTDIR)${tooldir}/lib${MULTISUBDIR}/$$x; done
+
crt0.o: crt0.S
crt1.o: crt1.S
crt2.o: crt2.S
crt3.o: crt3.S
crt4.o: crt4.S
+linux-crt0.o: linux-crt0.S
crtinit.o: crtinit.S
sim-crtinit.o: sim-crtinit.S
sim-pgcrtinit.o: sim-pgcrtinit.S
${AR} ${ARFLAGS} $@ ${OBJS}
${RANLIB} $@
+${LINUX_BSP}: ${LINUX_OBJS}
+ ${AR} ${ARFLAGS} $@ ${LINUX_OBJS}
+ ${RANLIB} $@
+
.PHONY: info dvi doc install-info clean-info
info doc dvi:
install-info:
*/
.text
- .globl _exception_handler # Exception Handler Label
.align 2
+ .weakext _exception_handler
+ .ent _exception_handler
+ .type _exception_handler, @function
_exception_handler:
- rtsd r17, 0
- nop
+ addi r11,r11,8
+ bra r11
--- /dev/null
+/* Default linker script, for normal executables */
+/*OUTPUT_FORMAT("elf32-microblaze", "", "") */
+/*SEARCH_DIR("/proj/fv1/gnu_builds/head/mb/release/lin/mb/microblaze-xilinx-elf/lib");*/
+/*SEARCH_DIR("/proj/fv1/gnu_builds/head/mb/release/lin/mb/microblaze-xilinx-elf/lib");*/
+OUTPUT_ARCH(microblaze)
+ENTRY(_start)
+_TEXT_START_ADDR = DEFINED(_TEXT_START_ADDR) ? _TEXT_START_ADDR : 0x50;
+
+PHDRS
+{
+ text PT_LOAD FILEHDR PHDRS;
+ data PT_LOAD;
+ bss PT_LOAD;
+}
+
+SECTIONS
+{
+ . = SIZEOF_HEADERS;
+ _ftext = .;
+ .text : {
+ *(.text)
+ *(.text.*)
+ *(.gnu.linkonce.t.*)
+ } : text
+ _etext = .;
+ .init : { KEEP (*(.init)) } =0
+ .fini : { KEEP (*(.fini)) } =0
+ PROVIDE (__CTOR_LIST__ = .);
+ PROVIDE (___CTOR_LIST__ = .);
+ .ctors :
+ {
+ /* gcc uses crtbegin.o to find the start of
+ the constructors, so we make sure it is
+ first. Because this is a wildcard, it
+ doesn't matter if the user does not
+ actually link against crtbegin.o; the
+ linker won't look for a file to match a
+ wildcard. The wildcard also means that it
+ doesn't matter which directory crtbegin.o
+ is in. */
+ KEEP (*crtbegin.o(.ctors))
+ /* We don't want to include the .ctor section from
+ from the crtend.o file until after the sorted ctors.
+ The .ctor section from the crtend file contains the
+ end of ctors marker and it must be last */
+ KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
+ KEEP (*(SORT(.ctors.*)))
+ KEEP (*(.ctors))
+ } : text
+ PROVIDE (__CTOR_END__ = .);
+ PROVIDE (___CTOR_END__ = .);
+ PROVIDE (__DTOR_LIST__ = .);
+ PROVIDE (___DTOR_LIST__ = .);
+ .dtors :
+ {
+ KEEP (*crtbegin.o(.dtors))
+ KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
+ KEEP (*(SORT(.dtors.*)))
+ KEEP (*(.dtors))
+ } : text
+ PROVIDE (__DTOR_END__ = .);
+ PROVIDE (___DTOR_END__ = .);
+ . = ALIGN(4);
+ _frodata = . ;
+ .rodata : {
+ *(.rodata)
+ *(.rodata.*)
+ *(.gnu.linkonce.r.*)
+ CONSTRUCTORS; /* Is this needed? */
+ } : text
+ _erodata = .;
+ /* New page. */
+ . += 0x1000;
+ /* Alignments by 8 to ensure that _SDA2_BASE_ on a word boundary */
+ /* Note that .sdata2 and .sbss2 must be contiguous */
+ . = ALIGN(8);
+ _ssrw = .;
+ .sdata2 : {
+ *(.sdata2)
+ *(.sdata2.*)
+ *(.gnu.linkonce.s2.*)
+ } : data
+ . = ALIGN(4);
+ .sbss2 : {
+ PROVIDE (__sbss2_start = .);
+ *(.sbss2)
+ *(.sbss2.*)
+ *(.gnu.linkonce.sb2.*)
+ PROVIDE (__sbss2_end = .);
+ } : data
+ . = ALIGN(8);
+ _essrw = .;
+ _ssrw_size = _essrw - _ssrw;
+ PROVIDE (_SDA2_BASE_ = _ssrw + (_ssrw_size / 2 ));
+ . = ALIGN(4);
+ _fdata = .;
+ .data : {
+ *(.data)
+ *(.gnu.linkonce.d.*)
+ CONSTRUCTORS; /* Is this needed? */
+ PROVIDE (__bss_start = .);
+ } : data
+ _edata = . ;
+ /* Added to handle pic code */
+ .got : {
+ *(.got)
+ }
+ .got1 : {
+ *(.got1)
+ }
+ .got2 : {
+ *(.got2)
+ }
+ /* Added by Sathya to handle C++ exceptions */
+ .eh_frame : {
+ *(.eh_frame)
+ }
+ .jcr : {
+ *(.jcr)
+ . = ALIGN(4096);
+ }
+ .gcc_except_table : {
+ *(.gcc_except_table)
+ }
+ . = ALIGN(4096);
+ /* Alignments by 8 to ensure that _SDA_BASE_ on a word boundary */
+ /* Note that .sdata and .sbss must be contiguous */
+ . = ALIGN(8);
+ _ssro = .;
+ .sdata : {
+ *(.sdata)
+ *(.sdata.*)
+ *(.gnu.linkonce.s.*)
+ }
+ . = ALIGN(4);
+ .sbss : {
+ PROVIDE (__sbss_start = .);
+ *(.sbss)
+ *(.sbss.*)
+ *(.gnu.linkonce.sb.*)
+ PROVIDE (__sbss_end = .);
+ }
+ . = ALIGN(8);
+ _essro = .;
+ _ssro_size = _essro - _ssro;
+ PROVIDE (_SDA_BASE_ = _ssro + (_ssro_size / 2 ));
+ . = ALIGN(4);
+ _fbss = .;
+ .bss : {
+ PROVIDE (__bss_start = .);
+ *(.bss)
+ *(.bss.*)
+ *(.gnu.linkonce.b.*)
+ *(COMMON)
+ . = ALIGN(4);
+ PROVIDE (__bss_end = .);
+ . = ALIGN(4096);
+ } : bss
+}
--- /dev/null
+%rename link old_link
+%rename lib libc
+
+*link:
+%(old_link) -defsym _TEXT_START_ADDR=0x10000 -z max-page-size=4096 -z common-page-size=4096 --no-omagic
+
+*libgloss:
+-lgloss-linux
+
+*lib:
+-start-group -lgloss-linux -lxil-linux -lc -lm -end-group
+
+*startfile:
+linux-crt0%O%s crtbegin%O%s
--- /dev/null
+/* linux-crt0 -- Startup routines for the Linux BSP.
+ *
+ * Copyright (c) 2011 Edgar E. Iglesias
+ *
+ * The authors hereby grant permission to use, copy, modify, distribute,
+ * and license this software and its documentation for any purpose, provided
+ * that existing copyright notices are retained in all copies and that this
+ * notice is included verbatim in any distributions. No written agreement,
+ * license, or royalty fee is required for any of the authorized uses.
+ * Modifications to this software may be copyrighted by their authors
+ * and need not follow the licensing terms described here, provided that
+ * the new terms are clearly indicated on the first page of each file where
+ * they apply.
+ */
+
+ .section .text
+ .globl _start
+ .ent _start
+ .type _start, @function
+_start:
+ la r13, r0, _SDA_BASE_
+ la r2, r0, _SDA2_BASE_
+
+ brlid r15, __init
+ nop
+
+ lwi r5, r1, 0
+ addik r6, r1, 4
+
+ # Add argc * 4.
+ addk r7, r5, r5
+ addk r7, r7, r7
+
+ brlid r15, main
+ # Now add 4 + r1 (i.e r6) in the delayslot.
+ addk r7, r7, r6
+
+ brlid r15, exit
+ addik r5, r3, 0
+ .size _start, . - _start
+ .end _start
+
+ /* Replacement for the GCC provided crti.S. This one avoids the
+ setup of stack protection regs (which result in privilieged
+ insn exceptions when running in user-space). */
+ .section .init, "ax"
+ .global __init
+ .align 2
+__init:
+ addik r1, r1, -8
+ sw r15, r0, r1
+
+ .section .fini, "ax"
+ .global __fini
+ .align 2
+__fini:
+ addik r1, r1, -8
+ sw r15, r0, r1
--- /dev/null
+int inbyte(void)
+{
+ char ch = 0;
+ read(0, &ch, 1);
+ return ch;
+}
--- /dev/null
+void outbyte (unsigned char c)
+{
+ _write(1, &c, 1);
+}
--- /dev/null
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+int isatty (int fd) {
+ return 1;
+}
--- /dev/null
+/* linux-syscalls - Syscall interface to microblaze linux
+ *
+ * Copyright (c) 2011 Edgar E. Iglesias
+ *
+ * The authors hereby grant permission to use, copy, modify, distribute,
+ * and license this software and its documentation for any purpose, provided
+ * that existing copyright notices are retained in all copies and that this
+ * notice is included verbatim in any distributions. No written agreement,
+ * license, or royalty fee is required for any of the authorized uses.
+ * Modifications to this software may be copyrighted by their authors
+ * and need not follow the licensing terms described here, provided that
+ * the new terms are clearly indicated on the first page of each file where
+ * they apply.
+ */
+
+#include "linux-syscalls.h"
+
+#define FUNC(name) .type name, %function; name:
+
+#define GLOBAL(name) .global name; FUNC(name)
+#define SIZE(name) .size name, .-name
+
+# define SYSCALL_BODY(name) \
+ addik r12, r0, SYS_ ## name; \
+ brki r14, 8; \
+ rtsd r15, 8; \
+ nop;
+
+# define SYSCALL(name) \
+ GLOBAL(_ ## name); \
+ SYSCALL_BODY(name); \
+ SIZE(_ ## name)
+
+SYSCALL(brk)
+SYSCALL(exit)
+SYSCALL(read)
+SYSCALL(write)
+SYSCALL(open)
+SYSCALL(close)
+SYSCALL(lseek)
+SYSCALL(fstat)
+SYSCALL(unlink)
+SYSCALL(getpid)
+SYSCALL(kill)
+SYSCALL(rt_sigaction)
--- /dev/null
+/** Linux system call interface for the MicroBlaze processor.
+ * Copyright (c) 2009 Edgar E. Iglesias.
+ *
+ * Permission to use, copy, modify, and distribute this software
+ * is freely granted, provided that this notice is preserved.
+ */
+
+#define SYS_exit 1
+#define SYS_fork 2
+#define SYS_read 3
+#define SYS_write 4
+#define SYS_open 5
+#define SYS_close 6
+#define SYS_waitpid 7
+#define SYS_creat 8
+#define SYS_link 9
+#define SYS_unlink 10
+#define SYS_execve 11
+#define SYS_chdir 12
+#define SYS_time 13
+
+#define SYS_lseek 19
+#define SYS_getpid 20
+#define SYS_kill 37
+#define SYS_brk 45
+#define SYS_fstat 108
+
+#define SYS_rt_sigaction 174
git://sourceware.org / newlib-cygwin.git / commitdiff