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authorNathan Sidwell <nathan@codesourcery.com>2006-10-08 00:08:48 +0400
committerNathan Sidwell <nathan@codesourcery.com>2006-10-08 00:08:48 +0400
commitd36ae2cec9355bd721f470cf4924c01fa3be04f7 (patch)
tree71bfeef819cda1fa27d095e2ed5cc2f70cb96b60 /libgloss/m68k/cf-hosted.S
parent92859c43ce9afb1ee0c5c8e0d2ab92276d4afc70 (diff)
* m68k/Makefile.in: Adjust Coldfire rules. (BDM_CRT0, BDM_BSP, BDM_OBJS, BDM_ISRS): Rename to ... (CF_CRT0, CF_BSP, CF_OBJS, CF_ISRS): ... here. Adjust. (BDM_OTHER_OBJS): Remove. (BDM_SYSOBJS): Rename to ... (UNHOSTED_OBJS): ... here. Adjust. (UNHOSTED_BSP, HOSTED_OBJS, HOSTED_BSP): New. (CF_HOSTED_SCRIPTS): New. (CF_SCRIPTS, CF_SOURCES): Adjust. * m68k/cf.sc: Add IO library variable. * m68k/bdm-crt0.S, m68k/bdm-crt1.c, m68k/bdm-isrs.c, m68k/bdm-sbrk.c, m68k/bdm-semihost.S: Rename to ... * m68k/cf-crt0.S, m68k/cf-crt1.c, m68k/cf-isrs.c, m68k/cf-sbrk.c, m68k/cf-hosted.S: ... here. * m68k/cf-exit.c: New. * m68k/bdm-gdb.h, m68k/bdm-semihost.h: Merge into ... * m68k/io.h: ... here. Add unhosted support. Adjust conversion function names. * m68k/bdm-gdb.c: Rename to ... * m68k/io-gdb.c: ... here. Adjust names of conversion functions. * m68k/bdm-close.c, m68k/bdm-exit.c, m68k/bdm-fstat.c, m68k/bdm-gettimeofday.c, m68k/bdm-isatty.c, m68k/bdm-lseek.c, m68k/bdm-open.c, m68k/bdm-read.c, m68k/bdm-rename.c, m68k/bdm-stat.c, m68k/bdm-system.c, m68k/bdm-time.c, m68k/bdm-unlink.c, m68k/bdm-write.c: Rename to ... * m68k/io-close.c, m68k/io-exit.c, m68k/io-fstat.c, m68k/io-gettimeofday.c, m68k/io-isatty.c, m68k/io-lseek.c, m68k/io-open.c, m68k/io-read.c, m68k/io-rename.c, m68k/io-stat.c, m68k/io-system.c, m68k/io-time.c, m68k/io-unlink.c, m68k/io-write.c: ... here. Include io.h. Adjust for hosted & unhosted libraries. Adjust names of gdb conversion functions.
Diffstat (limited to 'libgloss/m68k/cf-hosted.S')
-rw-r--r--libgloss/m68k/cf-hosted.S38
1 files changed, 38 insertions, 0 deletions
diff --git a/libgloss/m68k/cf-hosted.S b/libgloss/m68k/cf-hosted.S
new file mode 100644
index 000000000..9cf88209c
--- /dev/null
+++ b/libgloss/m68k/cf-hosted.S
@@ -0,0 +1,38 @@
+/*
+ * cf-hosted.S --
+ *
+ * Copyright (c) 2006 CodeSourcery Inc
+ *
+ * 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.
+ */
+
+/* Semihosting function. The debugger intercepts the halt, and
+ determines that it is followed by the sentinel pattern. */
+
+ .globl __hosted
+__hosted:
+ linkw %fp,#0
+ movel %fp@(8),%d0
+ movel %fp@(12),%d1
+ .align 4
+
+ /* The halt sequence must be 'nop; halt' and aligned to a 4 byte
+ boundary. */
+ nop
+ halt
+
+ /* This sentinel instruction value must be immediately after
+ the halt instruction. The debugger will adjust the pc, so
+ that it is never executed. This instruction is
+ 'movec %sp,0'. */
+ .long 0x4e7bf000
+ unlk %fp
+ rts