sim: testsuite: add support for $pwd replacements

Extend the common test framework to support $pwd replacements in
settings.  This allows replacing the custom cris @exedir@ with it.

sim/testsuite/cris/c/badldso3.c

@@ -2,7 +2,7 @@
 #notarget: cris*-*-elf
 #xerror:
 #cc: additional_flags=-Wl,-dynamic-linker,/compilercheck.x
-#sim: --sysroot=@exedir@
+#sim: --sysroot=$pwd
 #output: *: could not load ELF interpreter `*' for program `*'\n
  */
 #include "hello.c"

sim/testsuite/cris/c/c.exp

@@ -121,10 +121,6 @@ foreach src [lsort [glob -nocomplain $srcdir/$subdir/*.c]] {
 	    return
 	}
 
-	# Replace specific substitutions:
-	# @exedir@ is where the test-program is located.
-	regsub -all "@exedir@" $opt_val "[pwd]" opt_val
-
 	# Multiple of these options concatenate, they don't override.
 	if { $opt_name == "output" || $opt_name == "progoptions" } {
 	    set opt_val "$opts($opt_name)$opt_val"

sim/testsuite/cris/c/clone2.c

@@ -1,6 +1,6 @@
 /* Make sure the thread system trivially works with trace output.
 #notarget: cris*-*-elf
-#sim: --cris-trace=basic --trace-file=@exedir@/clone2.tmp
+#sim: --cris-trace=basic --trace-file=$pwd/clone2.tmp
 #output: got: a\nthen: bc\nexit: 0\n
 */
 #include "clone1.c"

sim/testsuite/cris/c/hellodyn.c

@@ -1,4 +1,4 @@
 /*
-#sim: --sysroot=@exedir@
+#sim: --sysroot=$pwd
  */
 #include "hello.c"

sim/testsuite/cris/c/hellodyn2.c

@@ -1,4 +1,4 @@
 /*
-#sim: --sysroot=@exedir@ --load-vma
+#sim: --sysroot=$pwd --load-vma
  */
 #include "hello.c"

sim/testsuite/cris/c/hellodyn3.c

@@ -3,6 +3,6 @@
    ld.so.cache (having no absolute path specified for the executable
    falls back on loading through the same mechanisms as a DSO).
 #notarget: *-*-elf
-#sim: --sysroot=@exedir@ @exedir@/lib/ld.so.1 --library-path /
+#sim: --sysroot=$pwd $pwd/lib/ld.so.1 --library-path /
  */
 #include "hello.c"

sim/testsuite/cris/c/openpf1.c

@@ -1,5 +1,5 @@
 /* Check that --sysroot is applied to open(2).
-#sim: --sysroot=@exedir@
+#sim: --sysroot=$pwd
 
    We assume, with EXE being the name of the executable:
    - The simulator executes with cwd the same directory where the executable

sim/testsuite/cris/c/openpf4.c

@@ -1,5 +1,5 @@
 /* Basic file operations, now *with* sysroot.
-#sim: --sysroot=@exedir@
+#sim: --sysroot=$pwd
 */
 #define PREFIX "/"
 #include "openpf3.c"

sim/testsuite/cris/c/openpf5.c

@@ -1,6 +1,6 @@
 /* Check that TRT happens when error on too many opened files.
 #notarget: cris*-*-elf
-#sim: --sysroot=@exedir@
+#sim: --sysroot=$pwd
 */
 #include <stddef.h>
 #include <stdlib.h>

sim/testsuite/cris/c/readlink3.c

@@ -1,6 +1,6 @@
 /* Simulator options:
 #notarget: cris*-*-elf
-#sim: --sysroot=@exedir@
+#sim: --sysroot=$pwd
 */
 #define SYSROOTED 1
 #include "readlink2.c"

sim/testsuite/cris/c/readlink6.c

@@ -1,5 +1,5 @@
 /* Check that rare readlink calls don't cause the simulator to abort.
 #notarget: cris*-*-elf
-#sim: --argv0 @exedir@/readlink6.c.x
+#sim: --argv0 $pwd/readlink6.c.x
 */
 #include "readlink2.c"

sim/testsuite/cris/c/readlink8.c

@@ -1,6 +1,6 @@
 /* Check that rare readlink calls don't cause the simulator to abort.
 #notarget: cris*-*-elf
-#sim: --sysroot=@exedir@ --env-unset PWD
+#sim: --sysroot=$pwd --env-unset PWD
  */
 #define SYSROOTED 1
 #include "readlink2.c"

sim/testsuite/cris/c/readlink9.c

@@ -1,6 +1,6 @@
 /* Check that odd cases of readlink work.
 #notarget: cris*-*-elf
-#cc: additional_flags=-DX="@exedir@"
+#cc: additional_flags=-DX="$pwd"
 */
 
 #include <unistd.h>

sim/testsuite/cris/c/seek2.c

@@ -1,4 +1,4 @@
 /* Simulator options:
-#sim: --sysroot=@exedir@/
+#sim: --sysroot=$pwd/
 */
 #include "seek1.c"

sim/testsuite/cris/c/stat3.c

@@ -1,5 +1,5 @@
 /* Simulator options:
-#sim: --sysroot=@exedir@
+#sim: --sysroot=$pwd
 */
 #include <sys/types.h>
 #include <sys/stat.h>

sim/testsuite/cris/c/stat4.c

@@ -1,6 +1,6 @@
 /* Simulator options:
 #notarget: cris*-*-elf
-#sim: --sysroot=@exedir@
+#sim: --sysroot=$pwd
 */
 
 #include <sys/types.h>

sim/testsuite/cris/c/truncate2.c

@@ -1,5 +1,5 @@
 /*
-#sim: --sysroot=@exedir@
+#sim: --sysroot=$pwd
 #notarget: cris*-*-elf
 */
 #define PREFIX "/"

sim/testsuite/cris/hw/rv-n-cris/rvc.exp

@@ -99,6 +99,7 @@ proc slurp_rv { file } {
 	if [regexp $pat $line xxx cmd] {
 	    # match!
 	    set cmd [string map [list \
+		{$pwd} [pwd] \
 		{$srcdir} "$srcdir" \
 		{$subdir} "$subdir" \
 	    ] "$cmd"]

sim/testsuite/lib/sim-defs.exp

@@ -447,6 +447,7 @@ proc slurp_options { file } {
 	if [regexp $pat $line xxx opt_name opt_machs opt_val] {
 	    # match!
 	    set opt_val [string map [list \
+		{$pwd} [pwd] \
 		{$srcdir} "$srcdir" \
 		{$subdir} "$subdir" \
 	    ] "$opt_val"]