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arm64: rework compat syscall macros

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The generated asm/unistd_compat_32.h header file now contains
macros that can be used directly in the vdso and the signal
trampolines, so remove the duplicate definitions.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2024-05-08 23:50:07 +02:00
parent e632bca07c
commit d2a4a07190
5 changed files with 22 additions and 37 deletions
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10
arch/arm64/include/asm/seccomp.h
View File

@ -8,13 +8,13 @@
#ifndef _ASM_SECCOMP_H
#define _ASM_SECCOMP_H
#include <asm/unistd.h>
#include <asm/unistd_compat_32.h>
#ifdef CONFIG_COMPAT
#define __NR_seccomp_read_32 __NR_compat_read
#define __NR_seccomp_write_32 __NR_compat_write
#define __NR_seccomp_exit_32 __NR_compat_exit
#define __NR_seccomp_sigreturn_32 __NR_compat_rt_sigreturn
#define __NR_seccomp_read_32 __NR_compat32_read
#define __NR_seccomp_write_32 __NR_compat32_write
#define __NR_seccomp_exit_32 __NR_compat32_exit
#define __NR_seccomp_sigreturn_32 __NR_compat32_rt_sigreturn
#endif /* CONFIG_COMPAT */
#include <asm-generic/seccomp.h>

15
arch/arm64/include/asm/unistd.h
View File

@ -16,21 +16,6 @@
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_SYS_VFORK
/*
* Compat syscall numbers used by the AArch64 kernel.
*/
#define __NR_compat_restart_syscall 0
#define __NR_compat_exit 1
#define __NR_compat_read 3
#define __NR_compat_write 4
#define __NR_compat_gettimeofday 78
#define __NR_compat_sigreturn 119
#define __NR_compat_rt_sigreturn 173
#define __NR_compat_clock_gettime 263
#define __NR_compat_clock_getres 264
#define __NR_compat_clock_gettime64 403
#define __NR_compat_clock_getres_time64 406
/*
* The following SVCs are ARM private.
*/

12
arch/arm64/include/asm/vdso/compat_gettimeofday.h
View File

@ -8,7 +8,7 @@
#ifndef __ASSEMBLY__
#include <asm/barrier.h>
#include <asm/unistd.h>
#include <asm/unistd_compat_32.h>
#include <asm/errno.h>
#include <asm/vdso/compat_barrier.h>
@ -24,7 +24,7 @@ int gettimeofday_fallback(struct __kernel_old_timeval *_tv,
register struct timezone *tz asm("r1") = _tz;
register struct __kernel_old_timeval *tv asm("r0") = _tv;
register long ret asm ("r0");
register long nr asm("r7") = __NR_compat_gettimeofday;
register long nr asm("r7") = __NR_compat32_gettimeofday;
asm volatile(
" swi #0\n"
@ -41,7 +41,7 @@ long clock_gettime_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
register struct __kernel_timespec *ts asm("r1") = _ts;
register clockid_t clkid asm("r0") = _clkid;
register long ret asm ("r0");
register long nr asm("r7") = __NR_compat_clock_gettime64;
register long nr asm("r7") = __NR_compat32_clock_gettime64;
asm volatile(
" swi #0\n"
@ -58,7 +58,7 @@ long clock_gettime32_fallback(clockid_t _clkid, struct old_timespec32 *_ts)
register struct old_timespec32 *ts asm("r1") = _ts;
register clockid_t clkid asm("r0") = _clkid;
register long ret asm ("r0");
register long nr asm("r7") = __NR_compat_clock_gettime;
register long nr asm("r7") = __NR_compat32_clock_gettime;
asm volatile(
" swi #0\n"
@ -75,7 +75,7 @@ int clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
register struct __kernel_timespec *ts asm("r1") = _ts;
register clockid_t clkid asm("r0") = _clkid;
register long ret asm ("r0");
register long nr asm("r7") = __NR_compat_clock_getres_time64;
register long nr asm("r7") = __NR_compat32_clock_getres_time64;
asm volatile(
" swi #0\n"
@ -92,7 +92,7 @@ int clock_getres32_fallback(clockid_t _clkid, struct old_timespec32 *_ts)
register struct old_timespec32 *ts asm("r1") = _ts;
register clockid_t clkid asm("r0") = _clkid;
register long ret asm ("r0");
register long nr asm("r7") = __NR_compat_clock_getres;
register long nr asm("r7") = __NR_compat32_clock_getres;
asm volatile(
" swi #0\n"

4
arch/arm64/kernel/signal32.c
View File

@ -17,7 +17,7 @@
#include <asm/signal32.h>
#include <asm/traps.h>
#include <linux/uaccess.h>
#include <asm/unistd.h>
#include <asm/unistd_compat_32.h>
#include <asm/vdso.h>
struct compat_vfp_sigframe {
@ -451,7 +451,7 @@ int compat_setup_frame(int usig, struct ksignal *ksig, sigset_t *set,
void compat_setup_restart_syscall(struct pt_regs *regs)
{
regs->regs[7] = __NR_compat_restart_syscall;
regs->regs[7] = __NR_compat32_restart_syscall;
}
/*

18
arch/arm64/kernel/sigreturn32.S
View File

@ -13,7 +13,7 @@
* need two 16-bit instructions.
*/
#include <asm/unistd.h>
#include <asm/unistd_compat_32.h>
.section .rodata
.globl __aarch32_sigret_code_start
@ -22,26 +22,26 @@ __aarch32_sigret_code_start:
/*
* ARM Code
*/
.byte __NR_compat_sigreturn, 0x70, 0xa0, 0xe3 // mov r7, #__NR_compat_sigreturn
.byte __NR_compat_sigreturn, 0x00, 0x00, 0xef // svc #__NR_compat_sigreturn
.byte __NR_compat32_sigreturn, 0x70, 0xa0, 0xe3 // mov r7, #__NR_compat32_sigreturn
.byte __NR_compat32_sigreturn, 0x00, 0x00, 0xef // svc #__NR_compat32_sigreturn
/*
* Thumb code
*/
.byte __NR_compat_sigreturn, 0x27 // svc #__NR_compat_sigreturn
.byte __NR_compat_sigreturn, 0xdf // mov r7, #__NR_compat_sigreturn
.byte __NR_compat32_sigreturn, 0x27 // svc #__NR_compat32_sigreturn
.byte __NR_compat32_sigreturn, 0xdf // mov r7, #__NR_compat32_sigreturn
/*
* ARM code
*/
.byte __NR_compat_rt_sigreturn, 0x70, 0xa0, 0xe3 // mov r7, #__NR_compat_rt_sigreturn
.byte __NR_compat_rt_sigreturn, 0x00, 0x00, 0xef // svc #__NR_compat_rt_sigreturn
.byte __NR_compat32_rt_sigreturn, 0x70, 0xa0, 0xe3 // mov r7, #__NR_compat32_rt_sigreturn
.byte __NR_compat32_rt_sigreturn, 0x00, 0x00, 0xef // svc #__NR_compat32_rt_sigreturn
/*
* Thumb code
*/
.byte __NR_compat_rt_sigreturn, 0x27 // svc #__NR_compat_rt_sigreturn
.byte __NR_compat_rt_sigreturn, 0xdf // mov r7, #__NR_compat_rt_sigreturn
.byte __NR_compat32_rt_sigreturn, 0x27 // svc #__NR_compat32_rt_sigreturn
.byte __NR_compat32_rt_sigreturn, 0xdf // mov r7, #__NR_compat32_rt_sigreturn
.globl __aarch32_sigret_code_end
__aarch32_sigret_code_end: