Jeff Dike | e32dacb | 2005-09-03 15:57:42 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) |
| 3 | * Licensed under the GPL |
| 4 | */ |
| 5 | |
| 6 | #include "linux/sys.h" |
| 7 | #include "linux/ptrace.h" |
| 8 | #include "asm/errno.h" |
| 9 | #include "asm/unistd.h" |
| 10 | #include "asm/ptrace.h" |
| 11 | #include "asm/current.h" |
| 12 | #include "sysdep/syscalls.h" |
| 13 | #include "kern_util.h" |
| 14 | #include "syscall.h" |
| 15 | |
| 16 | void handle_syscall(union uml_pt_regs *r) |
| 17 | { |
| 18 | struct pt_regs *regs = container_of(r, struct pt_regs, regs); |
| 19 | long result; |
| 20 | int syscall; |
| 21 | #ifdef UML_CONFIG_SYSCALL_DEBUG |
| 22 | int index; |
| 23 | |
| 24 | index = record_syscall_start(UPT_SYSCALL_NR(r)); |
| 25 | #endif |
| 26 | syscall_trace(r, 0); |
| 27 | |
| 28 | current->thread.nsyscalls++; |
| 29 | nsyscalls++; |
| 30 | |
| 31 | /* This should go in the declaration of syscall, but when I do that, |
| 32 | * strace -f -c bash -c 'ls ; ls' breaks, sometimes not tracing |
| 33 | * children at all, sometimes hanging when bash doesn't see the first |
| 34 | * ls exit. |
| 35 | * The assembly looks functionally the same to me. This is |
| 36 | * gcc version 4.0.1 20050727 (Red Hat 4.0.1-5) |
| 37 | * in case it's a compiler bug. |
| 38 | */ |
| 39 | syscall = UPT_SYSCALL_NR(r); |
| 40 | if((syscall >= NR_syscalls) || (syscall < 0)) |
| 41 | result = -ENOSYS; |
| 42 | else result = EXECUTE_SYSCALL(syscall, regs); |
| 43 | |
| 44 | REGS_SET_SYSCALL_RETURN(r->skas.regs, result); |
| 45 | |
| 46 | syscall_trace(r, 1); |
| 47 | #ifdef UML_CONFIG_SYSCALL_DEBUG |
| 48 | record_syscall_end(index, result); |
| 49 | #endif |
| 50 | } |