mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 18:36:37 +00:00
ce60d4d5d5
The i386 subarch happens to pull in original NR_syscalls. Maybe we can
make that work for all host arch, but for now just avoid the clash by
using an all-upper-case name.
CC arch/um/kernel/skas/syscall.o/data/linux-2.6/arch/um/kernel/skas/syscall.c:13:1: warning: "NR_syscalls" redefined
In file included from /data/linux-2.6/arch/x86/include/asm/unistd.h:3,
from /data/linux-2.6/arch/um/sys-i386/shared/sysdep/syscalls.h:6,
from /data/linux-2.6/arch/um/kernel/skas/syscall.c:10:
/data/linux-2.6/arch/x86/include/asm/unistd_32.h:349:1: warning: this is the location of the previous definition
Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
/*
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* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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* Licensed under the GPL
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*/
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#include "linux/kernel.h"
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#include "linux/ptrace.h"
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#include "kern_util.h"
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#include "sysdep/ptrace.h"
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#include "sysdep/syscalls.h"
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extern int syscall_table_size;
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#define NR_SYSCALLS (syscall_table_size / sizeof(void *))
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void handle_syscall(struct uml_pt_regs *r)
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{
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struct pt_regs *regs = container_of(r, struct pt_regs, regs);
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long result;
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int syscall;
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syscall_trace(r, 0);
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/*
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* This should go in the declaration of syscall, but when I do that,
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* strace -f -c bash -c 'ls ; ls' breaks, sometimes not tracing
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* children at all, sometimes hanging when bash doesn't see the first
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* ls exit.
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* The assembly looks functionally the same to me. This is
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* gcc version 4.0.1 20050727 (Red Hat 4.0.1-5)
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* in case it's a compiler bug.
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*/
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syscall = UPT_SYSCALL_NR(r);
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if ((syscall >= NR_SYSCALLS) || (syscall < 0))
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result = -ENOSYS;
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else result = EXECUTE_SYSCALL(syscall, regs);
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REGS_SET_SYSCALL_RETURN(r->gp, result);
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syscall_trace(r, 1);
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}
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