syscall_emul.hh (10495:75d2f19fecce) syscall_emul.hh (10496:0a5a8ecd0ec6)
1/*
2 * Copyright (c) 2012-2013 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software

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72#include "base/types.hh"
73#include "config/the_isa.hh"
74#include "cpu/base.hh"
75#include "cpu/thread_context.hh"
76#include "debug/SyscallVerbose.hh"
77#include "mem/page_table.hh"
78#include "mem/se_translating_port_proxy.hh"
79#include "sim/byteswap.hh"
1/*
2 * Copyright (c) 2012-2013 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software

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72#include "base/types.hh"
73#include "config/the_isa.hh"
74#include "cpu/base.hh"
75#include "cpu/thread_context.hh"
76#include "debug/SyscallVerbose.hh"
77#include "mem/page_table.hh"
78#include "mem/se_translating_port_proxy.hh"
79#include "sim/byteswap.hh"
80#include "sim/emul_driver.hh"
80#include "sim/process.hh"
81#include "sim/syscallreturn.hh"
82#include "sim/system.hh"
83
84///
85/// System call descriptor.
86///
87class SyscallDesc {

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599 ThreadContext *tc)
600{
601 int index = 0;
602 int fd = process->getSyscallArg(tc, index);
603 unsigned req = process->getSyscallArg(tc, index);
604
605 DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", fd, req);
606
81#include "sim/process.hh"
82#include "sim/syscallreturn.hh"
83#include "sim/system.hh"
84
85///
86/// System call descriptor.
87///
88class SyscallDesc {

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600 ThreadContext *tc)
601{
602 int index = 0;
603 int fd = process->getSyscallArg(tc, index);
604 unsigned req = process->getSyscallArg(tc, index);
605
606 DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", fd, req);
607
607 if (fd < 0 || process->sim_fd(fd) < 0) {
608 Process::FdMap *fdObj = process->sim_fd_obj(fd);
609
610 if (fdObj == NULL) {
608 // doesn't map to any simulator fd: not a valid target fd
609 return -EBADF;
610 }
611
611 // doesn't map to any simulator fd: not a valid target fd
612 return -EBADF;
613 }
614
615 if (fdObj->driver != NULL) {
616 return fdObj->driver->ioctl(process, tc, req);
617 }
618
612 if (OS::isTtyReq(req)) {
613 return -ENOTTY;
614 }
615
616 warn("Unsupported ioctl call: ioctl(%d, 0x%x, ...) @ \n",
617 fd, req, tc->pcState());
618 return -ENOTTY;
619}

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624 ThreadContext *tc, int index)
625{
626 std::string path;
627
628 if (!tc->getMemProxy().tryReadString(path,
629 process->getSyscallArg(tc, index)))
630 return -EFAULT;
631
619 if (OS::isTtyReq(req)) {
620 return -ENOTTY;
621 }
622
623 warn("Unsupported ioctl call: ioctl(%d, 0x%x, ...) @ \n",
624 fd, req, tc->pcState());
625 return -ENOTTY;
626}

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631 ThreadContext *tc, int index)
632{
633 std::string path;
634
635 if (!tc->getMemProxy().tryReadString(path,
636 process->getSyscallArg(tc, index)))
637 return -EFAULT;
638
632 if (path == "/dev/sysdev0") {
633 // This is a memory-mapped high-resolution timer device on Alpha.
634 // We don't support it, so just punt.
635 warn("Ignoring open(%s, ...)\n", path);
636 return -ENOENT;
637 }
638
639 int tgtFlags = process->getSyscallArg(tc, index);
640 int mode = process->getSyscallArg(tc, index);
641 int hostFlags = 0;
642
643 // translate open flags
644 for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) {
645 if (tgtFlags & OS::openFlagTable[i].tgtFlag) {
646 tgtFlags &= ~OS::openFlagTable[i].tgtFlag;

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656 hostFlags |= O_BINARY;
657#endif
658
659 // Adjust path for current working directory
660 path = process->fullPath(path);
661
662 DPRINTF(SyscallVerbose, "opening file %s\n", path.c_str());
663
639 int tgtFlags = process->getSyscallArg(tc, index);
640 int mode = process->getSyscallArg(tc, index);
641 int hostFlags = 0;
642
643 // translate open flags
644 for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) {
645 if (tgtFlags & OS::openFlagTable[i].tgtFlag) {
646 tgtFlags &= ~OS::openFlagTable[i].tgtFlag;

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656 hostFlags |= O_BINARY;
657#endif
658
659 // Adjust path for current working directory
660 path = process->fullPath(path);
661
662 DPRINTF(SyscallVerbose, "opening file %s\n", path.c_str());
663
664 if (startswith(path, "/dev/")) {
665 std::string filename = path.substr(strlen("/dev/"));
666 if (filename == "sysdev0") {
667 // This is a memory-mapped high-resolution timer device on Alpha.
668 // We don't support it, so just punt.
669 warn("Ignoring open(%s, ...)\n", path);
670 return -ENOENT;
671 }
672
673 EmulatedDriver *drv = process->findDriver(filename);
674 if (drv != NULL) {
675 // the driver's open method will allocate a fd from the
676 // process if necessary.
677 return drv->open(process, tc, mode, hostFlags);
678 }
679
680 // fall through here for pass through to host devices, such as
681 // /dev/zero
682 }
683
664 int fd;
665 int local_errno;
666 if (startswith(path, "/proc/") || startswith(path, "/system/") ||
667 startswith(path, "/platform/") || startswith(path, "/sys/")) {
668 // It's a proc/sys entry and requires special handling
669 fd = OS::openSpecialFile(path, process, tc);
670 local_errno = ENOENT;
671 } else {

--- 801 unchanged lines hidden --- 		684 int fd;
685 int local_errno;
686 if (startswith(path, "/proc/") || startswith(path, "/system/") ||
687 startswith(path, "/platform/") || startswith(path, "/sys/")) {
688 // It's a proc/sys entry and requires special handling
689 fd = OS::openSpecialFile(path, process, tc);
690 local_errno = ENOENT;
691 } else {

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