diff options
Diffstat (limited to 'arch/alpha')
| -rw-r--r-- | arch/alpha/alpha_linux_process.cc | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/arch/alpha/alpha_linux_process.cc b/arch/alpha/alpha_linux_process.cc index 783b189cc..16ebcca7b 100644 --- a/arch/alpha/alpha_linux_process.cc +++ b/arch/alpha/alpha_linux_process.cc @@ -41,6 +41,31 @@ using namespace std; using namespace AlphaISA; +/// Target pipe() handler. Even though this is a generic Posix call, +/// the Alpha return convention is funky, so that makes it +/// Alpha-specific. +SyscallReturn +pipeFunc(SyscallDesc *desc, int callnum, Process *process, + ExecContext *xc) +{ + int fds[2], sim_fds[2]; + int pipe_retval = pipe(fds); + + if (pipe_retval < 0) { + // error + return pipe_retval; + } + + sim_fds[0] = process->alloc_fd(fds[0]); + sim_fds[1] = process->alloc_fd(fds[1]); + + // Alpha Linux convention for pipe() is that fd[0] is returned as + // the return value of the function, and fd[1] is returned in r20. + xc->regs.intRegFile[20] = sim_fds[1]; + return sim_fds[0]; +} + + /// Target uname() handler. static SyscallReturn unameFunc(SyscallDesc *desc, int callnum, Process *process, @@ -159,7 +184,7 @@ SyscallDesc AlphaLinuxProcess::syscallDescs[] = { /* 39 */ SyscallDesc("setpgid", unimplementedFunc), /* 40 */ SyscallDesc("osf_old_lstat", unimplementedFunc), /* 41 */ SyscallDesc("dup", unimplementedFunc), - /* 42 */ SyscallDesc("pipe", unimplementedFunc), + /* 42 */ SyscallDesc("pipe", pipeFunc), /* 43 */ SyscallDesc("osf_set_program_attributes", unimplementedFunc), /* 44 */ SyscallDesc("osf_profil", unimplementedFunc), /* 45 */ SyscallDesc("open", openFunc<Linux>), |