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From: "simark at simark dot ca" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug gdb/28623] New: Missing catching return of execve syscall of
 PowerPC
Date: Wed, 24 Nov 2021 19:27:13 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D28623

            Bug ID: 28623
           Summary: Missing catching return of execve syscall of PowerPC
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: simark at simark dot ca
  Target Milestone: ---

When catching the execve syscall on other architectures, such ash x86-64, we
get an entry and return event:

    $ ./gdb -q --data-directory=3Ddata-directory m64
    Reading symbols from m64...
    (gdb) catch syscall execve
    Catchpoint 1 (syscall 'execve' [59])
    (gdb) r
    Starting program: /home/smarchi/build/binutils-gdb-all-targets/gdb/m64

    Catchpoint 1 (call to syscall execve), 0x00007ffff7ea92fb in execve () =
at
../sysdeps/unix/syscall-template.S:78
    78      ../sysdeps/unix/syscall-template.S: No such file or directory.
    (gdb) c
    Continuing.
    process 3592054 is executing new program:
/home/smarchi/build/binutils-gdb-all-targets/gdb/m64

    Catchpoint 1 (returned from syscall execve), 0x00007ffff7fd0100 in _sta=
rt
() from /lib64/ld-linux-x86-64.so.2

On PowerPC, we don't get the return:

    $ ./gdb -q -nx --data-directory=3Ddata-directory ./a.out
    Reading symbols from ./a.out...
    (gdb) catch syscall execve
    Catchpoint 1 (syscall 'execve' [11])
    (gdb) r
    Starting program: /home/simark/build/binutils-gdb/gdb/a.out

    Catchpoint 1 (call to syscall execve), 0x00007ffff7e6f18c in execve () =
from
/lib64/libc.so.6
    (gdb) c
    Continuing.
    process 98693 is executing new program:
/home/simark/build/binutils-gdb/gdb/a.out

    Catchpoint 1 (call to syscall execve), 0x00007ffff7e6f18c in execve () =
from
/lib64/libc.so.6

--=20
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