Implement getrusage

Implement getrusage.
These fields of struct rusage are not supported and always set to zero at this time
long ru_nswap;           /* swaps */
long ru_inblock;         /* block input operations */
long ru_oublock;         /* block output operations */
long ru_msgsnd;          /* messages sent */
long ru_msgrcv;          /* messages received */
long ru_nvcsw;           /* voluntary context switches */
long ru_nivcsw;          /* involuntary context switches */

test75.c is the unit test for this new function

Change-Id: I3f1eb69de1fce90d087d76773b09021fc6106539

lib/libc/sys-minix/Makefile.inc

@@ -18,7 +18,8 @@ SRCS+= 	accept.c access.c adjtime.c bind.c brk.c sbrk.c m_closefrom.c getsid.c \
 	sigprocmask.c socket.c socketpair.c stat.c statvfs.c symlink.c \
 	sync.c syscall.c sysuname.c truncate.c umask.c unlink.c write.c \
 	utimensat.c utimes.c futimes.c lutimes.c futimens.c \
-	_exit.c _ucontext.c environ.c __getcwd.c vfork.c sizeup.c init.c
+	_exit.c _ucontext.c environ.c __getcwd.c vfork.c sizeup.c init.c \
+	getrusage.c
 
 # Minix specific syscalls.
 SRCS+= cprofile.c lseek64.c sprofile.c _mcontext.c

lib/libc/sys-minix/getrusage.c

@@ -0,0 +1,32 @@
+#include <sys/cdefs.h>
+#include "namespace.h"
+#include <lib.h>
+
+#include <unistd.h>
+#include <sys/resource.h>
+
+int getrusage(int who, struct rusage *r_usage)
+{
+	int rc;
+	message m;
+	m.RU_WHO = who;
+	m.RU_RUSAGE_ADDR = r_usage;
+
+	if (r_usage == NULL) {
+		errno = EFAULT;
+		return -1;
+	}
+	if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	memset(r_usage, 0, sizeof(struct rusage));
+	if ((rc = _syscall(PM_PROC_NR, GETRUSAGE, &m)) < 0)
+		return rc;
+	m.RU_RUSAGE_ADDR = r_usage;
+	if ((rc = _syscall(VFS_PROC_NR, GETRUSAGE, &m)) < 0)
+		return rc;
+	m.RU_RUSAGE_ADDR = r_usage;
+	return _syscall(VM_PROC_NR, VM_GETRUSAGE, &m);
+}

lib/libc/sys/Makefile.inc

@@ -228,7 +228,7 @@ MAN+=	accept.2 access.2 acct.2 bind.2 brk.2 chdir.2 \
 	flock.2 fork.2 fsync.2 getcontext.2 getdents.2 \
 	getfh.2 getvfsstat.2 getgid.2 getgroups.2 \
 	getitimer.2 getlogin.2 getpeername.2 getpgrp.2 getpid.2 \
-	getpriority.2 getrlimit.2 getrusage.2 getsid.2 getsockname.2 \
+	getpriority.2 getrlimit.2 getsid.2 getsockname.2 \
 	getsockopt.2 gettimeofday.2 getuid.2 intro.2 ioctl.2 issetugid.2 \
 	kill.2 kqueue.2 ktrace.2 \
 	lfs_bmapv.2 lfs_markv.2 lfs_segclean.2 lfs_segwait.2 \
@@ -244,7 +244,7 @@ MAN+=	accept.2 access.2 acct.2 bind.2 brk.2 chdir.2 \
 	mprotect.2 mremap.2 msgctl.2 msgget.2 msgrcv.2 msgsnd.2 msync.2 \
 	munmap.2 nanosleep.2 nfssvc.2 ntp_adjtime.2 open.2 pathconf.2 pipe.2 
 .else
-MAN+=	adjtime.2 clock_settime.2 pipe.2 
+MAN+=	adjtime.2 clock_settime.2 pipe.2 getrusage.2
 .endif # !defined(__MINIX)
 .if !defined(__MINIX)
 MAN+=	pmc_control.2 poll.2 posix_fadvise.2 profil.2 ptrace.2 __quotactl.2 \

lib/libexec/exec_elf.c

@@ -228,6 +228,11 @@ int libexec_load_elf(struct exec_info *execi)
 		if(first || startv > vaddr) startv = vaddr;
 		first = 0;
 
+		if ((ph->p_flags & PF_X) != 0 && execi->text_size < seg_membytes)
+			execi->text_size = seg_membytes;
+		else
+			execi->data_size = seg_membytes;
+
 		if(try_mmap && execi->memmap(execi, vaddr, fbytes, foffset, clearend, mmap_prot) == OK) {
 #if ELF_DEBUG
 			printf("libexec: mmap 0x%lx-0x%lx done, clearend 0x%x\n",

lib/libexec/libexec.h

@@ -32,6 +32,8 @@ struct exec_info {
     int allow_setuid;                   /* Allow set{u,g}id execution? */
     vir_bytes stack_size;		/* Desired stack size */
     vir_bytes load_offset;		/* Desired load offset */
+    vir_bytes text_size;		/* Text segment size */
+    vir_bytes data_size;		/* Data segment size */
     off_t filesize;			/* How big is the file */
 
     /* Callback pointers for use by libexec */