target: semihosting: refresh URI to semihosting documentation

Some link if not anymore accessible.
Replace them with current one and add a backup in case one gets
not accessible anymore.

Change-Id: Iffca714555e94e5322a5daac1ea756e36bbd3a8f
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/9188
Tested-by: jenkins

doc/openocd.texi

@@ -1193,9 +1193,10 @@ monitor mode debug, only "halt mode" debug.}
 @cindex ARM semihosting
 When linked with a special runtime library provided with many
 toolchains@footnote{See chapter 8 "Semihosting" in
-@uref{http://infocenter.arm.com/help/topic/com.arm.doc.dui0203i/DUI0203I_rvct_developer_guide.pdf,
-ARM DUI 0203I}, the "RealView Compilation Tools Developer Guide".
-The CodeSourcery EABI toolchain also includes a semihosting library.},
+@uref{https://developer.arm.com/documentation/dui0203/latest/semihosting,
+ARM DUI 0203}.
+A semihosting library if available in newlib/libgloss, in U-Boot,
+in the CodeSourcery EABI toolchain, and others.},
 your target code can use I/O facilities on the debug host. That library
 provides a small set of system calls which are handled by OpenOCD.
 It can let the debugger provide your system console and a file system,

src/target/arm_semihosting.c

@@ -22,7 +22,11 @@
  * facilities on the host computer. The target application must be linked
  * against a library that forwards operation requests by using the SVC
  * instruction trapped at the Supervisor Call vector by the debugger.
- * Details can be found in chapter 8 of DUI0203I_rvct_developer_guide.pdf
+ * Details can be found in
+ * "Semihosting for AArch32 and AArch64, 2025Q1"
+ * https://github.com/ARM-software/abi-aa/releases/download/2025Q1/semihosting.pdf
+ * and in
+ * https://developer.arm.com/documentation/dui0203/latest/semihosting
  * from ARM Ltd.
  */
 

src/target/semihosting_common.c

@@ -24,8 +24,10 @@
  * instruction trapped by the debugger.
  *
  * Details can be found in
- * "Semihosting for AArch32 and AArch64, Release 2.0"
- * https://static.docs.arm.com/100863/0200/semihosting.pdf
+ * "Semihosting for AArch32 and AArch64, 2025Q1"
+ * https://github.com/ARM-software/abi-aa/releases/download/2025Q1/semihosting.pdf
+ * and in
+ * https://developer.arm.com/documentation/dui0203/latest/semihosting
  * from ARM Ltd.
  */
 

src/target/semihosting_common.h

@@ -19,8 +19,10 @@
 
 /*
  * According to:
- * "Semihosting for AArch32 and AArch64, Release 2.0"
- * https://static.docs.arm.com/100863/0200/semihosting.pdf
+ * "Semihosting for AArch32 and AArch64, 2025Q1"
+ * https://github.com/ARM-software/abi-aa/releases/download/2025Q1/semihosting.pdf
+ * and to:
+ * https://developer.arm.com/documentation/dui0203/latest/semihosting/about-semihosting/the-semihosting-interface
  * from ARM Ltd.
  *
  * The available semihosting operation numbers passed in R0 are allocated