File gdb-tdep-handle-pipe2-syscall-for-amd64.patch of Package gdb

Overview Repositories Revisions Requests Users Attributes Meta

File gdb-tdep-handle-pipe2-syscall-for-amd64.patch of Package gdb (Revision 0523fc379070243affe2506e13ba9316)

Currently displaying revision 0523fc379070243affe2506e13ba9316 , Show latest

[gdb/tdep] Handle pipe2 syscall for amd64

When running test-case gdb.reverse/pipe-reverse.exp on openSUSE Tumbleweed,
I run into:
...
(gdb) continue^M
Continuing.^M
Process record and replay target doesn't support syscall number 293^M
Process record: failed to record execution log.^M
^M
Program stopped.^M
0x00007ffff7daabdb in pipe () from /lib64/libc.so.6^M
(gdb) FAIL: gdb.reverse/pipe-reverse.exp: continue to breakpoint: marker2
...

The current glibc on Tumbleweed is 2.35, which contains commit
"linux: Implement pipe in terms of __NR_pipe2", and consequently syscall pipe2
is used in stead of syscall pipe.

There is already support added for syscall pipe2 for aarch64 (which only has
syscall pipe2, not syscall pipe), so enable the same for amd64, by:
- adding amd64_sys_pipe2 in enum amd64_syscall
- translating amd64_sys_pipe2 to gdb_sys_pipe2 in amd64_canonicalize_syscall

Tested on x86_64-linux, specifically on:
- openSUSE Tumbleweed (with glibc 2.35), and
- openSUSE Leap 15.3 (with glibc 2.31).

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29056

---
 gdb/amd64-linux-tdep.c | 3 +++
 gdb/amd64-linux-tdep.h | 1 +
 2 files changed, 4 insertions(+)

diff --git a/gdb/amd64-linux-tdep.c b/gdb/amd64-linux-tdep.c
index 0e5194fbeee..9a0759d639c 100644
--- a/gdb/amd64-linux-tdep.c
+++ b/gdb/amd64-linux-tdep.c
@@ -460,6 +460,9 @@ amd64_canonicalize_syscall (enum amd64_syscall syscall_number)
   case amd64_x32_sys_pipe:
     return gdb_sys_pipe;
 
+  case amd64_sys_pipe2:
+    return gdb_sys_pipe2;
+
   case amd64_sys_select:
   case amd64_x32_sys_select:
     return gdb_sys_select;
diff --git a/gdb/amd64-linux-tdep.h b/gdb/amd64-linux-tdep.h
index 4a41b3b8245..184b0c86f07 100644
--- a/gdb/amd64-linux-tdep.h
+++ b/gdb/amd64-linux-tdep.h
@@ -320,6 +320,7 @@ enum amd64_syscall {
   amd64_sys_sync_file_range = 277,
   amd64_sys_vmsplice = 278,
   amd64_sys_move_pages = 279,
+  amd64_sys_pipe2 = 293
 };
 
 /* Enum that defines the syscall identifiers for x32 linux.

Places

File gdb-tdep-handle-pipe2-syscall-for-amd64.patch of Package gdb (Revision 0523fc379070243affe2506e13ba9316)

Places