51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
/*
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* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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#include "linux/sys.h"
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#include "linux/ptrace.h"
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#include "asm/errno.h"
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#include "asm/unistd.h"
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#include "asm/ptrace.h"
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#include "asm/current.h"
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#include "sysdep/syscalls.h"
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#include "kern_util.h"
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#include "syscall.h"
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void handle_syscall(union 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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#ifdef UML_CONFIG_SYSCALL_DEBUG
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int index;
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index = record_syscall_start(UPT_SYSCALL_NR(r));
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#endif
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syscall_trace(r, 0);
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current->thread.nsyscalls++;
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nsyscalls++;
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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->skas.regs, result);
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syscall_trace(r, 1);
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#ifdef UML_CONFIG_SYSCALL_DEBUG
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record_syscall_end(index, result);
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#endif
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}
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