From c13ea339dccf54261f753424ff9eb516d97b34a1 Mon Sep 17 00:00:00 2001
From: Steve Reinhardt <stever@eecs.umich.edu>
Date: Thu, 23 Feb 2006 08:16:59 -0500
Subject: Add pipe() syscall to Alpha Linux emulation.
arch/alpha/alpha_linux_process.cc:
Add pipeFunc.
--HG--
extra : convert_revision : c094d2dff993d5e60bc43b7cd4b9586c15c634a3
---
arch/alpha/alpha_linux_process.cc | 27 ++++++++++++++++++++++++++-
1 file changed, 26 insertions(+), 1 deletion(-)
(limited to 'arch')
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>),
--
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