48 lines
1019 B
C
48 lines
1019 B
C
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/errno.h>
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#include <linux/nospec.h>
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#include <linux/ptrace.h>
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#include <linux/syscalls.h>
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#include <asm/syscall.h>
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long compat_arm_syscall(struct pt_regs *regs);
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asmlinkage long do_ni_syscall(struct pt_regs *regs)
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{
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#ifdef CONFIG_COMPAT
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long ret;
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if (is_compat_task()) {
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ret = compat_arm_syscall(regs);
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if (ret != -ENOSYS)
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return ret;
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}
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#endif
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return sys_ni_syscall();
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}
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static long __invoke_syscall(struct pt_regs *regs, syscall_fn_t syscall_fn)
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{
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return syscall_fn(regs->regs[0], regs->regs[1], regs->regs[2],
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regs->regs[3], regs->regs[4], regs->regs[5]);
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}
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asmlinkage void invoke_syscall(struct pt_regs *regs, unsigned int scno,
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unsigned int sc_nr,
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const syscall_fn_t syscall_table[])
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{
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long ret;
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if (scno < sc_nr) {
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syscall_fn_t syscall_fn;
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syscall_fn = syscall_table[array_index_nospec(scno, sc_nr)];
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ret = __invoke_syscall(regs, syscall_fn);
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} else {
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ret = do_ni_syscall(regs);
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}
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regs->regs[0] = ret;
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}
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