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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
-rw-r--r--arch/sparc/isa_traits.hh32
-rw-r--r--arch/sparc/linux/process.cc125
-rw-r--r--base/loader/elf_object.cc53
-rw-r--r--cpu/exec_context.hh14
-rw-r--r--sim/process.cc2
-rw-r--r--sim/syscall_emul.cc114
-rw-r--r--sim/syscall_emul.hh48
11 files changed, 328 insertions, 193 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),
diff --git a/arch/sparc/isa_traits.hh b/arch/sparc/isa_traits.hh
index 5a58bbaef..7f654e33b 100644
--- a/arch/sparc/isa_traits.hh
+++ b/arch/sparc/isa_traits.hh
@@ -78,7 +78,21 @@ namespace SparcISA
// semantically meaningful register indices
ZeroReg = 0 // architecturally meaningful
// the rest of these depend on the ABI
- };
+ SyscallNumReg = 1,
+ ArgumentReg0 = 8,
+ ArgumentReg1 = 9,
+ ArgumentReg2 = 10,
+ ArgumentReg3 = 11,
+ ArgumentReg4 = 12,
+ ArgumentReg5 = 13,
+ StackPoniterReg = 14,
+ ReturnAddressReg = 31, // Post Call, precall, 15
+ ReturnValueReg = 8, // Post return, 24 is pre-return.
+ // Some OS use a second register (o1) to return a second value
+ // for some syscalls
+ SyscallPseudoReturnReg = 9,
+ FramePointerReg = 30
+};
typedef uint64_t IntReg;
class IntRegFile
@@ -455,6 +469,22 @@ namespace SparcISA
*/
template <class XC>
static void zeroRegisters(XC *xc);
+
+ static inline setSyscallReturn(SyscallReturn return_value, RegFile *regs)
+ {
+ // check for error condition. SPARC syscall convention is to
+ // indicate success/failure in reg the carry bit of the ccr
+ // and put the return value itself in the standard return value reg ().
+ if (return_value.successful()) {
+ // no error
+ regs->miscRegFile.ccrFields.iccFields.c = 0;
+ regs->intRegFile[ReturnValueReg] = return_value.value();
+ } else {
+ // got an error, return details
+ regs->miscRegFile.ccrFields.iccFields.c = 1;
+ regs->intRegFile[ReturnValueReg] = -return_value.value();
+ }
+ }
};
const int VMPageSize = TheISA::VMPageSize;
diff --git a/arch/sparc/linux/process.cc b/arch/sparc/linux/process.cc
index ebfbb2f64..456f99b32 100644
--- a/arch/sparc/linux/process.cc
+++ b/arch/sparc/linux/process.cc
@@ -41,30 +41,6 @@
using namespace std;
using namespace SparcISA;
-/// 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
@@ -77,95 +53,38 @@ unameFunc(SyscallDesc *desc, int callnum, Process *process,
strcpy(name->nodename, "m5.eecs.umich.edu");
strcpy(name->release, "2.4.20");
strcpy(name->version, "#1 Mon Aug 18 11:32:15 EDT 2003");
- strcpy(name->machine, "alpha");
+ strcpy(name->machine, "sparc");
name.copyOut(xc->mem);
return 0;
}
-/// Target osf_getsysyinfo() handler. Even though this call is
-/// borrowed from Tru64, the subcases that get used appear to be
-/// different in practice from those used by Tru64 processes.
-static SyscallReturn
-osf_getsysinfoFunc(SyscallDesc *desc, int callnum, Process *process,
- ExecContext *xc)
-{
- unsigned op = xc->getSyscallArg(0);
- // unsigned nbytes = xc->getSyscallArg(2);
-
- switch (op) {
-
- case 45: { // GSI_IEEE_FP_CONTROL
- TypedBufferArg<uint64_t> fpcr(xc->getSyscallArg(1));
- // I don't think this exactly matches the HW FPCR
- *fpcr = 0;
- fpcr.copyOut(xc->mem);
- return 0;
- }
-
- default:
- cerr << "osf_getsysinfo: unknown op " << op << endl;
- abort();
- break;
- }
-
- return 1;
-}
-
-/// Target osf_setsysinfo() handler.
-static SyscallReturn
-osf_setsysinfoFunc(SyscallDesc *desc, int callnum, Process *process,
- ExecContext *xc)
-{
- unsigned op = xc->getSyscallArg(0);
- // unsigned nbytes = xc->getSyscallArg(2);
-
- switch (op) {
-
- case 14: { // SSI_IEEE_FP_CONTROL
- TypedBufferArg<uint64_t> fpcr(xc->getSyscallArg(1));
- // I don't think this exactly matches the HW FPCR
- fpcr.copyIn(xc->mem);
- DPRINTFR(SyscallVerbose, "osf_setsysinfo(SSI_IEEE_FP_CONTROL): "
- " setting FPCR to 0x%x\n", gtoh(*(uint64_t*)fpcr));
- return 0;
- }
-
- default:
- cerr << "osf_setsysinfo: unknown op " << op << endl;
- abort();
- break;
- }
-
- return 1;
-}
-
SyscallDesc SparcLinuxProcess::syscallDescs[] = {
/* 0 */ SyscallDesc("restart_syscall", unimplimentedFunc);
- /* 1 */ SyscallDesc("exit", unimplimentedFunc);
+ /* 1 */ SyscallDesc("exit", exitFunc);
/* 2 */ SyscallDesc("fork", unimplimentedFunc);
- /* 3 */ SyscallDesc("read", unimplimentedFunc);
- /* 4 */ SyscallDesc("write", unimplimentedFunc);
- /* 5 */ SyscallDesc("open", unimplimentedFunc);
- /* 6 */ SyscallDesc("close", unimplimentedFunc);
+ /* 3 */ SyscallDesc("read", readFunc);
+ /* 4 */ SyscallDesc("write", writeFunc);
+ /* 5 */ SyscallDesc("open", openFunc<Linux>);
+ /* 6 */ SyscallDesc("close", closeFinc);
/* 7 */ SyscallDesc("wait4", unimplimentedFunc);
/* 8 */ SyscallDesc("creat", unimplimentedFunc);
/* 9 */ SyscallDesc("link", unimplimentedFunc);
- /* 10 */ SyscallDesc("unlink", unimplimentedFunc);
+ /* 10 */ SyscallDesc("unlink", unlinkFunc);
/* 11 */ SyscallDesc("execv", unimplimentedFunc);
/* 12 */ SyscallDesc("chdir", unimplimentedFunc);
- /* 13 */ SyscallDesc("chown", unimplimentedFunc);
+ /* 13 */ SyscallDesc("chown", chownFunc);
/* 14 */ SyscallDesc("mknod", unimplimentedFunc);
- /* 15 */ SyscallDesc("chmod", unimplimentedFunc);
+ /* 15 */ SyscallDesc("chmod", chmodFunc<Linux>);
/* 16 */ SyscallDesc("lchown", unimplimentedFunc);
- /* 17 */ SyscallDesc("brk", unimplimentedFunc);
+ /* 17 */ SyscallDesc("brk", obreakFunc);
/* 18 */ SyscallDesc("perfctr", unimplimentedFunc);
- /* 19 */ SyscallDesc("lseek", unimplimentedFunc);
- /* 20 */ SyscallDesc("getpid", unimplimentedFunc);
+ /* 19 */ SyscallDesc("lseek", lseekFunc);
+ /* 20 */ SyscallDesc("getpid", getpidFunc);
/* 21 */ SyscallDesc("capget", unimplimentedFunc);
/* 22 */ SyscallDesc("capset", unimplimentedFunc);
- /* 23 */ SyscallDesc("setuid", unimplimentedFunc);
- /* 24 */ SyscallDesc("getuid", unimplimentedFunc);
+ /* 23 */ SyscallDesc("setuid", setuidFunc);
+ /* 24 */ SyscallDesc("getuid", getuidFunc);
/* 25 */ SyscallDesc("time", unimplimentedFunc);
/* 26 */ SyscallDesc("ptrace", unimplimentedFunc);
/* 27 */ SyscallDesc("alarm", unimplimentedFunc);
@@ -183,15 +102,15 @@ SyscallDesc SparcLinuxProcess::syscallDescs[] = {
/* 39 */ SyscallDesc("sendfile", unimplimentedFunc);
/* 40 */ SyscallDesc("lstat", unimplimentedFunc);
/* 41 */ SyscallDesc("dup", unimplimentedFunc);
- /* 42 */ SyscallDesc("pipe", unimplimentedFunc);
+ /* 42 */ SyscallDesc("pipe", pipePseudoFunc);
/* 43 */ SyscallDesc("times", unimplimentedFunc);
/* 44 */ SyscallDesc("getuid32", unimplimentedFunc);
/* 45 */ SyscallDesc("umount2", unimplimentedFunc);
/* 46 */ SyscallDesc("setgid", unimplimentedFunc);
- /* 47 */ SyscallDesc("getgid", unimplimentedFunc);
+ /* 47 */ SyscallDesc("getgid", getgidFunc);
/* 48 */ SyscallDesc("signal", unimplimentedFunc);
- /* 49 */ SyscallDesc("geteuid", unimplimentedFunc);
- /* 50 */ SyscallDesc("getegid", unimplimentedFunc);
+ /* 49 */ SyscallDesc("geteuid", geteuidFunc);
+ /* 50 */ SyscallDesc("getegid", getegidFunc);
/* 51 */ SyscallDesc("acct", unimplimentedFunc);
/* 52 */ SyscallDesc("memory_ordering", unimplimentedFunc);
/* 53 */ SyscallDesc("getgid32", unimplimentedFunc);
@@ -330,7 +249,7 @@ SyscallDesc SparcLinuxProcess::syscallDescs[] = {
/* 186 */ SyscallDesc("fremovexattr", unimplimentedFunc);
/* 187 */ SyscallDesc("tkill", unimplimentedFunc);
/* 188 */ SyscallDesc("exit_group", unimplimentedFunc);
- /* 189 */ SyscallDesc("uname", unimplimentedFunc);
+ /* 189 */ SyscallDesc("uname", unameFunc);
/* 190 */ SyscallDesc("init_module", unimplimentedFunc);
/* 191 */ SyscallDesc("personality", unimplimentedFunc);
/* 192 */ SyscallDesc("remap_file_pages", unimplimentedFunc);
@@ -338,7 +257,7 @@ SyscallDesc SparcLinuxProcess::syscallDescs[] = {
/* 194 */ SyscallDesc("epoll_ctl", unimplimentedFunc);
/* 195 */ SyscallDesc("epoll_wait", unimplimentedFunc);
/* 196 */ SyscallDesc("ioprio_set", unimplimentedFunc);
- /* 197 */ SyscallDesc("getppid", unimplimentedFunc);
+ /* 197 */ SyscallDesc("getppid", getppidFunc);
/* 198 */ SyscallDesc("sigaction", unimplimentedFunc);
/* 199 */ SyscallDesc("sgetmask", unimplimentedFunc);
/* 200 */ SyscallDesc("ssetmask", unimplimentedFunc);
@@ -437,6 +356,10 @@ SparcLinuxProcess::SparcLinuxProcess(const std::string &name,
: LiveProcess(name, objFile, stdin_fd, stdout_fd, stderr_fd, argv, envp),
Num_Syscall_Descs(sizeof(syscallDescs) / sizeof(SyscallDesc))
{
+ // The sparc syscall table must be <= 283 entries because that is all there
+ // is space for.
+ assert(Num_Syscall_Descs <= 283);
+
init_regs->intRegFile[0] = 0;
}
diff --git a/base/loader/elf_object.cc b/base/loader/elf_object.cc
index fd69c9e56..791c6f6de 100644
--- a/base/loader/elf_object.cc
+++ b/base/loader/elf_object.cc
@@ -75,15 +75,6 @@ ElfObject::tryFile(const string &fname, int fd, size_t len, uint8_t *data)
return NULL;
}
else {
-// if (ehdr.e_ident[EI_CLASS] == ELFCLASS32)
-// panic("32 bit ELF Binary, Not Supported");
- /* @todo this emachine value isn't offical yet.
- * so we probably shouldn't check it. */
-// if (ehdr.e_machine != EM_ALPHA)
-// panic("Non Alpha Binary, Not Supported");
-
- elf_end(elf);
-
//Detect the architecture
//Versioning issues in libelf need to be resolved to get the correct
//SPARC constants.
@@ -109,17 +100,61 @@ ElfObject::tryFile(const string &fname, int fd, size_t len, uint8_t *data)
//Detect the operating system
switch (ehdr.e_ident[EI_OSABI])
{
+
case ELFOSABI_LINUX:
opSys = ObjectFile::Linux;
break;
case ELFOSABI_SOLARIS:
opSys = ObjectFile::Solaris;
+ break;
case ELFOSABI_TRU64:
opSys = ObjectFile::Tru64;
+ break;
default:
opSys = ObjectFile::UnknownOpSys;
}
+ //take a look at the .note.ABI section
+ //It can let us know what's what.
+ if (opSys == ObjectFile::UnknownOpSys)
+ {
+ Elf_Scn *section;
+ GElf_Shdr shdr;
+ Elf_Data *data;
+ uint32_t osAbi;;
+ int secIdx = 1;
+
+ // Get the first section
+ section = elf_getscn(elf, secIdx);
+
+ // While there are no more sections
+ while (section != NULL) {
+ gelf_getshdr(section, &shdr);
+ if (shdr.sh_type == SHT_NOTE && !strcmp(".note.ABI-tag",
+ elf_strptr(elf, ehdr.e_shstrndx, shdr.sh_name))) {
+ // we have found a ABI note section
+ // Check the 5th 32bit word for OS 0 == linux, 1 == hurd,
+ // 2 == solaris, 3 == freebsd
+ data = elf_rawdata(section, NULL);
+ assert(data->d_buf);
+ if(ehdr.e_ident[EI_DATA] == ELFDATA2LSB)
+ osAbi = htole(((uint32_t*)data->d_buf)[4]);
+ else
+ osAbi = htobe(((uint32_t*)data->d_buf)[4]);
+
+ switch(osAbi) {
+ case 0:
+ opSys = ObjectFile::Linux;
+ break;
+ case 2:
+ opSys = ObjectFile::Solaris;
+ break;
+ }
+ } // if section found
+ section = elf_getscn(elf, ++secIdx);
+ } // while sections
+ }
+ elf_end(elf);
return new ElfObject(fname, fd, len, data, arch, opSys);
}
}
diff --git a/cpu/exec_context.hh b/cpu/exec_context.hh
index bc3551b4f..97bfc5f0d 100644
--- a/cpu/exec_context.hh
+++ b/cpu/exec_context.hh
@@ -464,19 +464,7 @@ class ExecContext
void setSyscallReturn(SyscallReturn return_value)
{
- // 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).
- const int RegA3 = 19; // only place this is used
- if (return_value.successful()) {
- // no error
- regs.intRegFile[RegA3] = 0;
- regs.intRegFile[TheISA::ReturnValueReg] = return_value.value();
- } else {
- // got an error, return details
- regs.intRegFile[RegA3] = (TheISA::IntReg) -1;
- regs.intRegFile[TheISA::ReturnValueReg] = -return_value.value();
- }
+ TheISA::setSyscallReturn(return_value, &regs);
}
void syscall()
diff --git a/sim/process.cc b/sim/process.cc
index fddd9a0b9..894beeb05 100644
--- a/sim/process.cc
+++ b/sim/process.cc
@@ -354,7 +354,7 @@ LiveProcess::syscall(ExecContext *xc)
{
num_syscalls++;
- int64_t callnum = xc->regs.intRegFile[ReturnValueReg];
+ int64_t callnum = xc->regs.intRegFile[SyscallNumReg];
SyscallDesc *desc = getDesc(callnum);
if (desc == NULL)
diff --git a/sim/syscall_emul.cc b/sim/syscall_emul.cc
index d22dde3b8..682d11267 100644
--- a/sim/syscall_emul.cc
+++ b/sim/syscall_emul.cc
@@ -324,4 +324,118 @@ fcntlFunc(SyscallDesc *desc, int num, Process *process,
}
}
+SyscallReturn
+pipePseudoFunc(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[SyscallPseudoReturnReg] = sim_fds[1];
+ return sim_fds[0];
+}
+
+
+SyscallReturn
+getpidPseudoFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ // Make up a PID. There's no interprocess communication in
+ // fake_syscall mode, so there's no way for a process to know it's
+ // not getting a unique value.
+
+ xc->regs.intRegFile[SyscallPseudoReturnReg] = 99;
+ return 100;
+}
+
+
+SyscallReturn
+getuidPseudoFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ // Make up a UID and EUID... it shouldn't matter, and we want the
+ // simulation to be deterministic.
+
+ // EUID goes in r20.
+ xc->regs.intRegFile[SyscallPseudoReturnReg] = 100; // EUID
+ return 100; // UID
+}
+
+
+SyscallReturn
+getgidPseudoFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ // Get current group ID. EGID goes in r20.
+ xc->regs.intRegFile[SyscallPseudoReturnReg] = 100;
+ return 100;
+}
+
+
+SyscallReturn
+setuidFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ // can't fathom why a benchmark would call this.
+ warn("Ignoring call to setuid(%d)\n", xc->getSyscallArg(0));
+ return 0;
+}
+
+SyscallReturn
+getpidFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ // Make up a PID. There's no interprocess communication in
+ // fake_syscall mode, so there's no way for a process to know it's
+ // not getting a unique value.
+
+ xc->regs.intRegFile[SyscallPseudoReturnReg] = 99;
+ return 100;
+}
+
+SyscallReturn
+getppidFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ return 99;
+}
+
+SyscallReturn
+getuidFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ return 100; // UID
+}
+
+SyscallReturn
+geteuidFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ return 100; // UID
+}
+
+SyscallReturn
+getgidFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ return 100;
+}
+
+SyscallReturn
+getegidFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ return 100;
+}
+
diff --git a/sim/syscall_emul.hh b/sim/syscall_emul.hh
index eca9f79e0..539358b8f 100644
--- a/sim/syscall_emul.hh
+++ b/sim/syscall_emul.hh
@@ -243,6 +243,54 @@ SyscallReturn fchownFunc(SyscallDesc *desc, int num,
SyscallReturn fcntlFunc(SyscallDesc *desc, int num,
Process *process, ExecContext *xc);
+/// Target setuid() handler.
+SyscallReturn setuidFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target getpid() handler.
+SyscallReturn getpidFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target getuid() handler.
+SyscallReturn getuidFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target getgid() handler.
+SyscallReturn getgidFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target getppid() handler.
+SyscallReturn getppidFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target geteuid() handler.
+SyscallReturn geteuidFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target getegid() handler.
+SyscallReturn getegidFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+
+
+/// Pseudo Funcs - These functions use a different return convension,
+/// returning a second value in a register other than the normal return register
+SyscallReturn pipePseudoFunc(SyscallDesc *desc, int num,
+ Process *process, ExecContext *xc);
+
+/// Target getpidPseudo() handler.
+SyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target getuidPseudo() handler.
+SyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+/// Target getgidPseudo() handler.
+SyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num,
+ Process *p, ExecContext *xc);
+
+
/// This struct is used to build an target-OS-dependent table that
/// maps the target's open() flags to the host open() flags.
struct OpenFlagTransTable {
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-23 20:23:13 +0000