[binutils-gdb] gdb/aarch64: record/replay support for RPRFM, PRFM (reg), PRFUM

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=f6c1ca239d932db39a6f19d9bd343f4f4fddba76

commit f6c1ca239d932db39a6f19d9bd343f4f4fddba76
Author: Ezra Sitorus <[email protected]>
Date:   Mon May 18 13:34:38 2026 +0100

    gdb/aarch64: record/replay support for RPRFM, PRFM (reg), PRFUM
    
    The PRFM (register) instruction variant was unsupported. This is added
    along with RPRFM and PRFUM.
    
    No testcase has been added as these are hint instructions which don't
    modify registers/memory.
    
    The full testsuite was done on aarch64-none-linux-gnu without RPRFM.
    The gdb.arch and gdb.reverse tests were run on Shrinkwrap with RPRFM
    support.
    
    Approved-By: Luis Machado <[email protected]>

Diff:
---
 gdb/aarch64-tdep.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/gdb/aarch64-tdep.c b/gdb/aarch64-tdep.c
index 4befaa2720d..a5e586a735c 100644
--- a/gdb/aarch64-tdep.c
+++ b/gdb/aarch64-tdep.c
@@ -5827,6 +5827,11 @@ aarch64_record_load_store (aarch64_insn_decode_record *aarch64_insn_r)
       else
 	if (size_bits != 0x03)
 	  ld_flag = 0x01;
+	else if (size_bits == 0x3 && vector_flag == 0x0 && opc == 0x2)
+	  {
+	    /* PRFM (register) or RPRFM */
+	    return AARCH64_RECORD_SUCCESS;
+	  }
 	else
 	  return AARCH64_RECORD_UNKNOWN;
 
@@ -5857,7 +5862,7 @@ aarch64_record_load_store (aarch64_insn_decode_record *aarch64_insn_r)
 	  aarch64_insn_r->reg_rec_count = 1;
 	}
     }
-  /* Load/store register (immediate and unprivileged) instructions.  */
+  /* Load/store register (immediate and unprivileged) instructions and PRFUM.  */
   else if ((insn_bits24_27 & 0x0b) == 0x08 && insn_bits28_29 == 0x03
 	   && !insn_bit21)
     {
@@ -5876,7 +5881,11 @@ aarch64_record_load_store (aarch64_insn_decode_record *aarch64_insn_r)
 	if (size_bits != 0x03)
 	  ld_flag = 0x01;
 	else
-	  return AARCH64_RECORD_UNKNOWN;
+	  if (insn_bits10_11 == 0)
+	    /* PRFUM instruction.  */
+	    return AARCH64_RECORD_SUCCESS;
+      else
+	return AARCH64_RECORD_UNKNOWN;
 
       if (!ld_flag)
 	{