Re: [RFC PATCH v4 27/29] Hexagon (linux-user/hexagon) Linux user emulation

[Laurent Vivier]

Le 28/09/2020 à 19:28, Taylor Simpson a écrit :
> Implementation of Linux user emulation for Hexagon
> Some common files modified in addition to new files in linux-user/hexagon
> 
> Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>  linux-user/hexagon/sockbits.h       |  18 ++
>  linux-user/hexagon/syscall_nr.h     | 343 
> ++++++++++++++++++++++++++++++++++++
>  linux-user/hexagon/target_cpu.h     |  44 +++++
>  linux-user/hexagon/target_elf.h     |  40 +++++
>  linux-user/hexagon/target_fcntl.h   |  18 ++
>  linux-user/hexagon/target_signal.h  |  34 ++++
>  linux-user/hexagon/target_structs.h |  46 +++++
>  linux-user/hexagon/target_syscall.h |  36 ++++
>  linux-user/hexagon/termbits.h       |  18 ++
>  linux-user/qemu.h                   |   2 +
>  linux-user/syscall_defs.h           |  33 ++++
>  linux-user/elfload.c                |  16 ++
>  linux-user/hexagon/cpu_loop.c       |  99 +++++++++++
>  linux-user/hexagon/signal.c         | 276 +++++++++++++++++++++++++++++
>  linux-user/hexagon/meson.build      |  22 +++
>  linux-user/meson.build              |   1 +
>  scripts/gensyscalls.sh              |   3 +-
>  17 files changed, 1048 insertions(+), 1 deletion(-)
>  create mode 100644 linux-user/hexagon/sockbits.h
>  create mode 100644 linux-user/hexagon/syscall_nr.h
>  create mode 100644 linux-user/hexagon/target_cpu.h
>  create mode 100644 linux-user/hexagon/target_elf.h
>  create mode 100644 linux-user/hexagon/target_fcntl.h
>  create mode 100644 linux-user/hexagon/target_signal.h
>  create mode 100644 linux-user/hexagon/target_structs.h
>  create mode 100644 linux-user/hexagon/target_syscall.h
>  create mode 100644 linux-user/hexagon/termbits.h
>  create mode 100644 linux-user/hexagon/cpu_loop.c
>  create mode 100644 linux-user/hexagon/signal.c
>  create mode 100644 linux-user/hexagon/meson.build
> 
...
> diff --git a/linux-user/hexagon/meson.build b/linux-user/hexagon/meson.build
> new file mode 100644
> index 0000000..7158e52
> --- /dev/null
> +++ b/linux-user/hexagon/meson.build
> @@ -0,0 +1,22 @@
> +##
> +##  Copyright(c) 2020 Qualcomm Innovation Center, Inc. All Rights Reserved.
> +##
> +##  This program is free software; you can redistribute it and/or modify
> +##  it under the terms of the GNU General Public License as published by
> +##  the Free Software Foundation; either version 2 of the License, or
> +##  (at your option) any later version.
> +##
> +##  This program is distributed in the hope that it will be useful,
> +##  but WITHOUT ANY WARRANTY; without even the implied warranty of
> +##  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> +##  GNU General Public License for more details.
> +##
> +##  You should have received a copy of the GNU General Public License
> +##  along with this program; if not, see <http://www.gnu.org/licenses/>.
> +##
> +
> +syscall_nr_generators += {
> +  'hexagon': generator(sh,
> +                       arguments: [ 'cat', 'syscall_nr.h', '>', '@OUTPUT@' ],
> +                     output: '@BASENAME@_nr.h')

Why do we need that?
The syscall_nr_generators is used to generate syscall_nr.h from syscall.tbl

> +}
> diff --git a/linux-user/meson.build b/linux-user/meson.build
> index 2b94e4b..8b1dfc8 100644
> --- a/linux-user/meson.build
> +++ b/linux-user/meson.build
> @@ -22,6 +22,7 @@ syscall_nr_generators = {}
>  
>  subdir('alpha')
>  subdir('arm')
> +subdir('hexagon')

so you don't need that either

>  subdir('hppa')
>  subdir('i386')
>  subdir('m68k')
> diff --git a/scripts/gensyscalls.sh b/scripts/gensyscalls.sh
> index b7b8456..e2ee60a 100755
> --- a/scripts/gensyscalls.sh
> +++ b/scripts/gensyscalls.sh
> @@ -53,7 +53,7 @@ read_includes()
>  
>  filter_defines()
>  {
> -    grep -e "#define __NR_" -e "#define __NR3264"
> +    grep -e "#define __NR_" -e "#define __NR3264" | grep -v __NR_syscalls

Why do you remove __NR_syscalls?

>  }
>  
>  rename_defines()
> @@ -99,4 +99,5 @@ generate_syscall_nr openrisc 32 
> "$output/linux-user/openrisc/syscall_nr.h"
>  
>  generate_syscall_nr riscv 32 "$output/linux-user/riscv/syscall32_nr.h"
>  generate_syscall_nr riscv 64 "$output/linux-user/riscv/syscall64_nr.h"
> +generate_syscall_nr hexagon 32 "$output/linux-user/hexagon/syscall_nr.h"

Please, move this line to the previous block (that generates
syscall_nr.h and not syscallXX_nr.h)

>  rm -fr "$TMP"
> 

Thanks,
Laurent