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-rw-r--r--arch/alpha/SConscript1
-rw-r--r--arch/alpha/isa_traits.hh94
-rw-r--r--arch/alpha/linux/process.cc31
-rw-r--r--arch/alpha/tru64/process.cc7
4 files changed, 65 insertions, 68 deletions
diff --git a/arch/alpha/SConscript b/arch/alpha/SConscript
index 6dec2d070..ed7fd3404 100644
--- a/arch/alpha/SConscript
+++ b/arch/alpha/SConscript
@@ -65,7 +65,6 @@ full_system_sources = Split('''
# Syscall emulation (non-full-system) sources
syscall_emulation_sources = Split('''
- common_syscall_emul.cc
linux/process.cc
tru64/process.cc
process.cc
diff --git a/arch/alpha/isa_traits.hh b/arch/alpha/isa_traits.hh
index a551db485..198473918 100644
--- a/arch/alpha/isa_traits.hh
+++ b/arch/alpha/isa_traits.hh
@@ -53,6 +53,44 @@ int DTB_ASN_ASN(uint64_t reg);
int ITB_ASN_ASN(uint64_t reg);
}
+#if !FULL_SYSTEM
+class SyscallReturn {
+ public:
+ template <class T>
+ SyscallReturn(T v, bool s)
+ {
+ retval = (uint64_t)v;
+ success = s;
+ }
+
+ template <class T>
+ SyscallReturn(T v)
+ {
+ success = (v >= 0);
+ retval = (uint64_t)v;
+ }
+
+ ~SyscallReturn() {}
+
+ SyscallReturn& operator=(const SyscallReturn& s) {
+ retval = s.retval;
+ success = s.success;
+ return *this;
+ }
+
+ bool successful() { return success; }
+ uint64_t value() { return retval; }
+
+
+ private:
+ uint64_t retval;
+ bool success;
+};
+
+#endif
+
+
+
namespace AlphaISA
{
@@ -82,6 +120,7 @@ namespace AlphaISA
ProcedureValueReg = 27,
ReturnAddressReg = 26,
ReturnValueReg = 0,
+ SyscallNumReg = 0,
FramePointerReg = 15,
ArgumentReg0 = 16,
ArgumentReg1 = 17,
@@ -89,6 +128,10 @@ namespace AlphaISA
ArgumentReg3 = 19,
ArgumentReg4 = 20,
ArgumentReg5 = 21,
+ SyscallSuccessReg = 19,
+ // Some OS use a second register (o1) to return a second value
+ // for some syscalls
+ SyscallPseudoReturnReg = ArgumentReg4,
LogVMPageSize = 13, // 8K bytes
VMPageSize = (1 << LogVMPageSize),
@@ -303,6 +346,21 @@ extern const int reg_redir[NumIntRegs];
template <class XC>
void zeroRegisters(XC *xc);
+ static inline void setSyscallReturn(SyscallReturn return_value, RegFile *regs)
+ {
+ // check for error condition. Alpha syscall convention is to
+ // indicate success/failure in reg a3 (r19) and put the
+ // return value itself in the standard return value reg (v0).
+ if (return_value.successful()) {
+ // no error
+ regs->intRegFile[SyscallSuccessReg] = 0;
+ regs->intRegFile[ReturnValueReg] = return_value.value();
+ } else {
+ // got an error, return details
+ regs->intRegFile[SyscallSuccessReg] = (IntReg) -1;
+ regs->intRegFile[ReturnValueReg] = -return_value.value();
+ }
+ }
//typedef AlphaISA TheISA;
@@ -336,42 +394,6 @@ extern const int reg_redir[NumIntRegs];
const Addr MaxAddr = (Addr)-1;
};
-#if !FULL_SYSTEM
-class SyscallReturn {
- public:
- template <class T>
- SyscallReturn(T v, bool s)
- {
- retval = (uint64_t)v;
- success = s;
- }
-
- template <class T>
- SyscallReturn(T v)
- {
- success = (v >= 0);
- retval = (uint64_t)v;
- }
-
- ~SyscallReturn() {}
-
- SyscallReturn& operator=(const SyscallReturn& s) {
- retval = s.retval;
- success = s.success;
- return *this;
- }
-
- bool successful() { return success; }
- uint64_t value() { return retval; }
-
-
- private:
- uint64_t retval;
- bool success;
-};
-
-#endif
-
static inline AlphaISA::ExtMachInst
AlphaISA::makeExtMI(AlphaISA::MachInst inst, const uint64_t &pc) {
#if FULL_SYSTEM
diff --git a/arch/alpha/linux/process.cc b/arch/alpha/linux/process.cc
index d78e6a4ee..2ebdbfc0f 100644
--- a/arch/alpha/linux/process.cc
+++ b/arch/alpha/linux/process.cc
@@ -26,7 +26,6 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-#include "arch/alpha/common_syscall_emul.hh"
#include "arch/alpha/linux/process.hh"
#include "arch/alpha/isa_traits.hh"
@@ -41,29 +40,7 @@
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.
@@ -162,11 +139,11 @@ SyscallDesc AlphaLinuxProcess::syscallDescs[] = {
/* 17 */ SyscallDesc("brk", obreakFunc),
/* 18 */ SyscallDesc("osf_getfsstat", unimplementedFunc),
/* 19 */ SyscallDesc("lseek", lseekFunc),
- /* 20 */ SyscallDesc("getxpid", getpidFunc),
+ /* 20 */ SyscallDesc("getxpid", getpidPseudoFunc),
/* 21 */ SyscallDesc("osf_mount", unimplementedFunc),
/* 22 */ SyscallDesc("umount", unimplementedFunc),
/* 23 */ SyscallDesc("setuid", setuidFunc),
- /* 24 */ SyscallDesc("getxuid", getuidFunc),
+ /* 24 */ SyscallDesc("getxuid", getuidPseudoFunc),
/* 25 */ SyscallDesc("exec_with_loader", unimplementedFunc),
/* 26 */ SyscallDesc("osf_ptrace", unimplementedFunc),
/* 27 */ SyscallDesc("osf_nrecvmsg", unimplementedFunc),
@@ -184,12 +161,12 @@ SyscallDesc AlphaLinuxProcess::syscallDescs[] = {
/* 39 */ SyscallDesc("setpgid", unimplementedFunc),
/* 40 */ SyscallDesc("osf_old_lstat", unimplementedFunc),
/* 41 */ SyscallDesc("dup", unimplementedFunc),
- /* 42 */ SyscallDesc("pipe", pipeFunc),
+ /* 42 */ SyscallDesc("pipe", pipePseudoFunc),
/* 43 */ SyscallDesc("osf_set_program_attributes", unimplementedFunc),
/* 44 */ SyscallDesc("osf_profil", unimplementedFunc),
/* 45 */ SyscallDesc("open", openFunc<Linux>),
/* 46 */ SyscallDesc("osf_old_sigaction", unimplementedFunc),
- /* 47 */ SyscallDesc("getxgid", getgidFunc),
+ /* 47 */ SyscallDesc("getxgid", getgidPseudoFunc),
/* 48 */ SyscallDesc("osf_sigprocmask", ignoreFunc),
/* 49 */ SyscallDesc("osf_getlogin", unimplementedFunc),
/* 50 */ SyscallDesc("osf_setlogin", unimplementedFunc),
diff --git a/arch/alpha/tru64/process.cc b/arch/alpha/tru64/process.cc
index 58d41e3ef..16621a8e2 100644
--- a/arch/alpha/tru64/process.cc
+++ b/arch/alpha/tru64/process.cc
@@ -27,7 +27,6 @@
*/
#include "arch/alpha/isa_traits.hh"
-#include "arch/alpha/common_syscall_emul.hh"
#include "arch/alpha/tru64/process.hh"
#include "cpu/exec_context.hh"
#include "kern/tru64/tru64.hh"
@@ -179,11 +178,11 @@ SyscallDesc AlphaTru64Process::syscallDescs[] = {
/* 17 */ SyscallDesc("obreak", obreakFunc),
/* 18 */ SyscallDesc("pre_F64_getfsstat", unimplementedFunc),
/* 19 */ SyscallDesc("lseek", lseekFunc),
- /* 20 */ SyscallDesc("getpid", getpidFunc),
+ /* 20 */ SyscallDesc("getpid", getpidPseudoFunc),
/* 21 */ SyscallDesc("mount", unimplementedFunc),
/* 22 */ SyscallDesc("unmount", unimplementedFunc),
/* 23 */ SyscallDesc("setuid", setuidFunc),
- /* 24 */ SyscallDesc("getuid", getuidFunc),
+ /* 24 */ SyscallDesc("getuid", getuidPseudoFunc),
/* 25 */ SyscallDesc("exec_with_loader", unimplementedFunc),
/* 26 */ SyscallDesc("ptrace", unimplementedFunc),
/* 27 */ SyscallDesc("recvmsg", unimplementedFunc),
@@ -206,7 +205,7 @@ SyscallDesc AlphaTru64Process::syscallDescs[] = {
/* 44 */ SyscallDesc("profil", unimplementedFunc),
/* 45 */ SyscallDesc("open", openFunc<Tru64>),
/* 46 */ SyscallDesc("obsolete osigaction", unimplementedFunc),
- /* 47 */ SyscallDesc("getgid", getgidFunc),
+ /* 47 */ SyscallDesc("getgid", getgidPseudoFunc),
/* 48 */ SyscallDesc("sigprocmask", ignoreFunc),
/* 49 */ SyscallDesc("getlogin", unimplementedFunc),
/* 50 */ SyscallDesc("setlogin", unimplementedFunc),
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-25 01:58:33 +0000