cleaning up syscalls in preparation for x86_64 port

- hide all the legacy xxxxxx32 name cruft in syscall.h so the actual
source files can be clean and uniform across all archs.

- cleanup llseek/lseek and mmap2/mmap handling for 32/64 bit systems

- alternate implementation for nice if the target lacks nice syscall

14 files changed, 27 insertions, 24 deletions

diff --git a/src/unistd/chown.c b/src/unistd/chown.c
index 6069a2fe..b89b1735 100644
--- a/src/unistd/chown.c
+++ b/src/unistd/chown.c
@@ -3,5 +3,5 @@
 
 int chown(const char *path, uid_t uid, gid_t gid)
 {
-	return syscall3(__NR_chown32, (long)path, uid, gid);
+	return syscall3(__NR_chown, (long)path, uid, gid);
 }
diff --git a/src/unistd/fchown.c b/src/unistd/fchown.c
index 990f006d..6050b774 100644
--- a/src/unistd/fchown.c
+++ b/src/unistd/fchown.c
@@ -3,5 +3,5 @@
 
 int fchown(int fd, uid_t uid, gid_t gid)
 {
-	return syscall3(__NR_fchown32, fd, uid, gid);
+	return syscall3(__NR_fchown, fd, uid, gid);
 }
diff --git a/src/unistd/getegid.c b/src/unistd/getegid.c
index 0e626b75..33ee2057 100644
--- a/src/unistd/getegid.c
+++ b/src/unistd/getegid.c
@@ -3,5 +3,5 @@
 
 gid_t getegid(void)
 {
-	return syscall0(__NR_getegid32);
+	return syscall0(__NR_getegid);
 }
diff --git a/src/unistd/geteuid.c b/src/unistd/geteuid.c
index 39d6ac7b..cdec631a 100644
--- a/src/unistd/geteuid.c
+++ b/src/unistd/geteuid.c
@@ -3,5 +3,5 @@
 
 uid_t geteuid(void)
 {
-	return syscall0(__NR_geteuid32);
+	return syscall0(__NR_geteuid);
 }
diff --git a/src/unistd/getgid.c b/src/unistd/getgid.c
index 186635a2..8a4590be 100644
--- a/src/unistd/getgid.c
+++ b/src/unistd/getgid.c
@@ -3,5 +3,5 @@
 
 gid_t getgid(void)
 {
-	return syscall0(__NR_getgid32);
+	return syscall0(__NR_getgid);
 }
diff --git a/src/unistd/getgroups.c b/src/unistd/getgroups.c
index 6f19870e..37619b9a 100644
--- a/src/unistd/getgroups.c
+++ b/src/unistd/getgroups.c
@@ -3,6 +3,5 @@
 
 int getgroups(int count, gid_t list[])
 {
-	/* this depends on our gid_t being 32bit */
-	return syscall2(__NR_getgroups32, count, (long)list);
+	return syscall2(__NR_getgroups, count, (long)list);
 }
diff --git a/src/unistd/getuid.c b/src/unistd/getuid.c
index 9d4e53f5..cd7233d1 100644
--- a/src/unistd/getuid.c
+++ b/src/unistd/getuid.c
@@ -3,5 +3,5 @@
 
 uid_t getuid(void)
 {
-	return syscall0(__NR_getuid32);
+	return syscall0(__NR_getuid);
 }
diff --git a/src/unistd/lchown.c b/src/unistd/lchown.c
index 30e83916..a8402132 100644
--- a/src/unistd/lchown.c
+++ b/src/unistd/lchown.c
@@ -3,5 +3,5 @@
 
 int lchown(const char *path, uid_t uid, gid_t gid)
 {
-	return syscall3(__NR_lchown32, (long)path, uid, gid);
+	return syscall3(__NR_lchown, (long)path, uid, gid);
 }
diff --git a/src/unistd/lseek.c b/src/unistd/lseek.c
index 0dab2679..0152866f 100644
--- a/src/unistd/lseek.c
+++ b/src/unistd/lseek.c
@@ -4,13 +4,12 @@
 
 off_t lseek(int fd, off_t offset, int whence)
 {
-	/* optimized away at compiletime */
-	if (sizeof(long) == 8)
-		return syscall3(__NR_lseek, fd, offset, whence);
-	else {
-		off_t result;
-		return syscall5(__NR__llseek, fd, offset>>32, offset, (long)&result, whence) ? -1 : result;
-	}
+#ifdef __NR__llseek
+	off_t result;
+	return syscall5(__NR__llseek, fd, offset>>32, offset, (long)&result, whence) ? -1 : result;
+#else
+	return syscall3(__NR_lseek, fd, offset, whence);
+#endif
 }
 
 LFS64(lseek);
diff --git a/src/unistd/nice.c b/src/unistd/nice.c
index 4b28ef41..f38db678 100644
--- a/src/unistd/nice.c
+++ b/src/unistd/nice.c
@@ -1,7 +1,12 @@
 #include <unistd.h>
+#include <sys/resource.h>
 #include "syscall.h"
 
 int nice(int inc)
 {
+#ifdef __NR_nice
 	return syscall1(__NR_nice, inc);
+#else
+	return setpriority(PRIO_PROCESS, 0, getpriority(PRIO_PROCESS, 0)+inc);
+#endif
 }
diff --git a/src/unistd/setgid.c b/src/unistd/setgid.c
index 00c7a03a..42976d95 100644
--- a/src/unistd/setgid.c
+++ b/src/unistd/setgid.c
@@ -4,6 +4,6 @@
 
 int setgid(gid_t gid)
 {
-	if (libc.rsyscall) return libc.rsyscall(__NR_setgid32, gid, 0, 0, 0, 0, 0);
-	return syscall1(__NR_setgid32, gid);
+	if (libc.rsyscall) return libc.rsyscall(__NR_setgid, gid, 0, 0, 0, 0, 0);
+	return syscall1(__NR_setgid, gid);
 }
diff --git a/src/unistd/setregid.c b/src/unistd/setregid.c
index d25dab76..158753be 100644
--- a/src/unistd/setregid.c
+++ b/src/unistd/setregid.c
@@ -4,6 +4,6 @@
 
 int setregid(gid_t rgid, gid_t egid)
 {
-	if (libc.rsyscall) return libc.rsyscall(__NR_setregid32, rgid, egid, 0, 0, 0, 0);
-	return syscall2(__NR_setregid32, rgid, egid);
+	if (libc.rsyscall) return libc.rsyscall(__NR_setregid, rgid, egid, 0, 0, 0, 0);
+	return syscall2(__NR_setregid, rgid, egid);
 }
diff --git a/src/unistd/setreuid.c b/src/unistd/setreuid.c
index 0ba2277b..47c67306 100644
--- a/src/unistd/setreuid.c
+++ b/src/unistd/setreuid.c
@@ -4,6 +4,6 @@
 
 int setreuid(uid_t ruid, uid_t euid)
 {
-	if (libc.rsyscall) return libc.rsyscall(__NR_setreuid32, ruid, euid, 0, 0, 0, 0);
-	return syscall2(__NR_setreuid32, ruid, euid);
+	if (libc.rsyscall) return libc.rsyscall(__NR_setreuid, ruid, euid, 0, 0, 0, 0);
+	return syscall2(__NR_setreuid, ruid, euid);
 }
diff --git a/src/unistd/setuid.c b/src/unistd/setuid.c
index 53b74d88..9e9da61f 100644
--- a/src/unistd/setuid.c
+++ b/src/unistd/setuid.c
@@ -4,6 +4,6 @@
 
 int setuid(uid_t uid)
 {
-	if (libc.rsyscall) return libc.rsyscall(__NR_setuid32, uid, 0, 0, 0, 0, 0);
-	return syscall1(__NR_setuid32, uid);
+	if (libc.rsyscall) return libc.rsyscall(__NR_setuid, uid, 0, 0, 0, 0, 0);
+	return syscall1(__NR_setuid, uid);
 }