[binutils-gdb] gdb/linux-nat: xfer_memory_partial return E_IO on error

[Lancelot SIX <lsix@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=284b6bb5c639735735246c4c60c0e06427e5c449

commit 284b6bb5c639735735246c4c60c0e06427e5c449
Author: Lancelot SIX <lancelot.six@amd.com>
Date:   Wed May 25 09:37:54 2022 +0100

    gdb/linux-nat: xfer_memory_partial return E_IO on error
    
    When accessing /proc/PID/mem, if pread64/pwrite64/read/write encounters
    an error and return -1, linux_proc_xfer_memory_partial return
    TARGET_XFER_EOF.
    
    I think it should return TARGET_XFER_E_IO in this case.  TARGET_XFER_EOF
    is returned when pread64/pwrite64/read/frite returns 0, which indicates
    that the address space is gone and the whole process has exited or
    execed.
    
    This patch makes this change.
    
    Regression tested on x86_64-linux-gnu.
    
    Change-Id: I6030412459663b8d7933483fdda22a6c2c5d7221

Diff:
---
 gdb/linux-nat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gdb/linux-nat.c b/gdb/linux-nat.c
index 3b5400896bc..b9164e621db 100644
--- a/gdb/linux-nat.c
+++ b/gdb/linux-nat.c
@@ -3917,7 +3917,7 @@ linux_proc_xfer_memory_partial (gdb_byte *readbuf, const gdb_byte *writebuf,
       linux_nat_debug_printf ("accessing fd %d for pid %d failed: %s (%d)",
 			      fd, inferior_ptid.pid (),
 			      safe_strerror (errno), errno);
-      return TARGET_XFER_EOF;
+      return TARGET_XFER_E_IO;
     }
   else if (ret == 0)
     {