[LTP] [PATCH v6 1/3] Refactor regen.sh script to generate syscalls

[Cyril Hrubis]

Hi!
> +echo '
^
This adds an empty line to the start of the file.

> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/************************************************
> + * GENERATED FILE: DO NOT EDIT/PATCH THIS FILE  *
> + *  change your arch specific .in file instead  *
> + ************************************************/
> +
> +/*
> + * Here we stick all the ugly *fallback* logic for linux
> + * system call numbers (those __NR_ thingies).
> + */
> +
> +#ifndef LAPI_SYSCALLS_H__
> +#define LAPI_SYSCALLS_H__
> +
> +#include <errno.h>
> +#include <sys/syscall.h>
> +#include <asm/unistd.h>
> +
> +#ifdef TST_TEST_H__
> +#define TST_SYSCALL_BRK__(NR, SNR) ({ \
> +tst_brk(TCONF, \
> +	"syscall(%d) " SNR " not supported on your arch", NR); \
> +})
> +#else
> +inline static void dummy_cleanup(void) {}
> +
> +#define TST_SYSCALL_BRK__(NR, SNR) ({ \
> +tst_brkm(TCONF, dummy_cleanup, \
> +	"syscall(%d) " SNR " not supported on your arch", NR); \
> +})
> +#endif
> +
> +#define tst_syscall(NR, ...) ({ \
> +intptr_t tst_ret; \
> +if (NR == __LTP__NR_INVALID_SYSCALL) { \
> +	errno = ENOSYS; \
> +	tst_ret = -1; \
> +} else { \
> +	tst_ret = syscall(NR, ##__VA_ARGS__); \
> +} \
> +if (tst_ret == -1 && errno == ENOSYS) { \
> +	TST_SYSCALL_BRK__(NR, #NR); \
> +} \
> +tst_ret; \
> +})
> +
> +#define __LTP__NR_INVALID_SYSCALL -1' >${SYSCALLS_FILE}
> +
> +while IFS= read -r arch; do
> +	(
> +		echo
> +		case ${arch} in
> +		sparc64) echo "#if defined(__sparc__) && defined(__arch64__)" ;;
> +		sparc) echo "#if defined(__sparc__) && !defined(__arch64__)" ;;
> +		s390) echo "#if defined(__s390__) && !defined(__s390x__)" ;;
> +		mips64n32) echo "#if defined(__mips__) && defined(_ABIN32)" ;;
> +		mips64) echo "#if defined(__mips__) && defined(_ABI64)" ;;
> +		mipso32) echo "#if defined(__mips__) && defined(_ABIO32) && _MIPS_SZLONG == 32" ;;
> +		parisc) echo "#ifdef __hppa__" ;;
> +		loongarch64) echo "#ifdef __loongarch__" ;;
> +		arm64) echo "#ifdef __aarch64__" ;;
> +		*) echo "#ifdef __${arch}__" ;;
> +		esac
> +
> +		while read -r line; do
> +			set -- ${line}
> +			syscall_nr="__NR_$1"
> +			shift
> +
> +			echo "# ifndef ${syscall_nr}"
> +			echo "#  define ${syscall_nr} $*"
> +			echo "# endif"
> +		done <"${SCRIPT_DIR}/${arch}.in"
> +		echo "#endif"
> +		echo
> +	) >>${SYSCALLS_FILE}
> +done <${SUPPORTED_ARCH}
> +
> +(
> +	echo
> +	echo "/* Common stubs */"
> +	for num in $(awk '{print $1}' "${SCRIPT_DIR}/"*.in | sort -u); do
> +		syscall_nr="__NR_${num}"
> +		shift

This shift is not needed here anymore and generates a lot of warnings.

> +		echo "# ifndef ${syscall_nr}"
> +		echo "#  define ${syscall_nr} __LTP__NR_INVALID_SYSCALL"
> +		echo "# endif"
> +	done
> +	echo "#endif"
> +) >>${SYSCALLS_FILE}

-- 
Cyril Hrubis
chrubis@suse.cz