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authorAli Saidi <saidi@eecs.umich.edu>2006-03-09 15:42:09 -0500
committerAli Saidi <saidi@eecs.umich.edu>2006-03-09 15:42:09 -0500
commitce3a6343b6c54e95d63403d46c9ddea384e49476 (patch)
tree2acc56fa5c2ea2230658ed9b23a17364a241fdab /sim/syscall_emul.cc
parentab67095b2a43b5f2d44d1e1a517d1079ddf9f104 (diff)
downloadgem5-ce3a6343b6c54e95d63403d46c9ddea384e49476.tar.xz
no more common syscall emulation, now common for everyone
check abi-tag note section of elf binary for OS add pseudo functions (moved from alpha and made to be generic) move setsyscallreturn into isa traits arch/alpha/SConscript: no more common syscall emulation, now common for everyone arch/alpha/isa_traits.hh: move setsyscallreturn into isa description arch/alpha/linux/process.cc: arch/alpha/tru64/process.cc: use generic functions rather than alpha specific ones arch/sparc/isa_traits.hh: have consts for generic pseudo syscalls arch/sparc/linux/process.cc: use generic functions base/loader/elf_object.cc: check abi-tag note section of elf binary for OS cpu/exec_context.hh: move syssyscallreturn into isa traits sim/process.cc: find call num with a more generic sim/syscall_emul.cc: sim/syscall_emul.hh: add pseudo functions (moved from alpha and made to be generic) --HG-- extra : convert_revision : 5a31024ecde7e39b830365ddd84593ea501a34d2
Diffstat (limited to 'sim/syscall_emul.cc')
-rw-r--r--sim/syscall_emul.cc114
1 files changed, 114 insertions, 0 deletions
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;
+}
+