Turns out I wasn't building the syscall libraries. Do so.

plat/linux/libsys/.distr

@@ -0,0 +1,20 @@
+brk.c
+build.mk
+close.c
+creat.c
+errno.s
+_exit.c
+getpid.c
+gettimeofday.c
+_hol0.s
+isatty.c
+kill.c
+libsys.h
+lseek.c
+open.c
+pmfile
+read.c
+sbrk.c
+signal.c
+syscalls.h
+write.c

plat/linux/libsys/_exit.c

@@ -0,0 +1,14 @@
+/* $Source: /cvsroot/tack/Ack/plat/linux386/libsys/_exit.c,v $
+ * $State: Exp $
+ * $Revision: 1.1 $
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include "libsys.h"
+
+void _exit(int status)
+{
+	_syscall(__NR_exit, status, 0, 0);
+}

plat/linux/libsys/_hol0.s

@@ -0,0 +1,20 @@
+#
+! $Source: /cvsroot/tack/Ack/plat/linux386/libsys/_hol0.s,v $
+! $State: Exp $
+! $Revision: 1.1 $
+
+! Declare segments (the order is important).
+
+.sect .text
+.sect .rom
+.sect .data
+.sect .bss
+
+.sect .text
+
+! 
+! This data block is used to store information about the current line number
+! and file.
+
+.define hol0
+.comm hol0, 8

plat/linux/libsys/brk.c

@@ -0,0 +1,17 @@
+/* $Source: /cvsroot/tack/Ack/plat/linux386/libsys/brk.c,v $
+ * $State: Exp $
+ * $Revision: 1.1 $
+ */
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include "libsys.h"
+
+int brk(void* end)
+{
+	int e = _syscall(__NR_brk, (quad) end, 0, 0);
+	if (e == -1)
+		errno = ENOMEM;
+	return e;
+}

plat/linux/libsys/build.mk

@@ -0,0 +1,27 @@
+define build-liblinux-impl
+
+$(call reset)
+$(eval objdir := $(PLATFORM))
+$(call ackfile, plat/linux/liblinux/_exit.c)
+$(call ackfile, plat/linux/liblinux/_hol0.s)
+$(call ackfile, plat/linux/liblinux/brk.c)
+$(call ackfile, plat/linux/liblinux/close.c)
+$(call ackfile, plat/linux/liblinux/creat.c)
+$(call ackfile, plat/linux/liblinux/errno.s)
+$(call ackfile, plat/linux/liblinux/getpid.c)
+$(call ackfile, plat/linux/liblinux/gettimeofday.c)
+$(call ackfile, plat/linux/liblinux/isatty.c)
+$(call ackfile, plat/linux/liblinux/kill.c)
+$(call ackfile, plat/linux/liblinux/lseek.c)
+$(call ackfile, plat/linux/liblinux/open.c)
+$(call ackfile, plat/linux/liblinux/read.c)
+$(call ackfile, plat/linux/liblinux/sbrk.c)
+$(call ackfile, plat/linux/liblinux/signal.c)
+$(call ackfile, plat/linux/liblinux/write.c)
+
+$(call acklibrary, $(OBJDIR)/$D/liblinux.a)
+$(call installto, $(PLATIND)/$(PLATFORM)/liblinux.a)
+
+endef
+
+build-liblinux = $(eval $(build-liblinux-impl))

plat/linux/libsys/close.c

@@ -0,0 +1,14 @@
+/* $Source: /cvsroot/tack/Ack/plat/linux386/libsys/close.c,v $
+ * $State: Exp $
+ * $Revision: 1.1 $
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include "libsys.h"
+
+int close(int fd)
+{
+	return _syscall(__NR_close, fd, 0, 0);
+}

plat/linux/libsys/creat.c

@@ -0,0 +1,13 @@
+/* $Source: /cvsroot/tack/Ack/plat/linux386/libsys/creat.c,v $
+ * $State: Exp $
+ * $Revision: 1.1 $
+ */
+
+#include <stdlib.h>
+#include <unistd.h>
+#include "libsys.h"
+
+int creat(const char* filename, int mode)
+{
+	return open(filename, O_CREAT|O_WRONLY|O_TRUNC, mode);
+}

plat/linux/libsys/errno.s

@@ -0,0 +1,28 @@
+#
+! $Source: /cvsroot/tack/Ack/plat/linux386/libsys/errno.s,v $
+! $State: Exp $
+! $Revision: 1.1 $
+
+! Declare segments (the order is important).
+
+.sect .text
+.sect .rom
+.sect .data
+.sect .bss
+
+#define D(e) .define e; e
+
+.sect .data
+
+! Define various ACK error numbers. Note that these are *not* ANSI C
+! errnos, and are used for different purposes.
+
+D(ERANGE)         = 1
+D(ESET)           = 2
+D(EIDIVZ)         = 6
+D(EHEAP)          = 17
+D(EILLINS)        = 18
+D(EODDZ)          = 19
+D(ECASE)          = 20
+D(EBADMON)        = 25
+

plat/linux/libsys/getpid.c

@@ -0,0 +1,14 @@
+/* $Source: /cvsroot/tack/Ack/plat/linux386/libsys/getpid.c,v $
+ * $State: Exp $
+ * $Revision: 1.1 $
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include "libsys.h"
+
+pid_t getpid(void)
+{
+	return _syscall(__NR_getpid, 0, 0, 0);
+}

plat/linux/libsys/gettimeofday.c

@@ -0,0 +1,16 @@
+/* $Source: /cvsroot/tack/Ack/plat/linux386/libsys/gettimeofday.c,v $
+ * $State: Exp $
+ * $Revision: 1.1 $
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <sys/time.h>
+#include <time.h>
+#include <unistd.h>
+#include "libsys.h"
+
+int gettimeofday(struct timeval *tv, struct timezone *tz)
+{
+	return _syscall(__NR_gettimeofday, (quad) tv, (quad) tz, 0);
+}

plat/linux/libsys/isatty.c

@@ -0,0 +1,13 @@
+/* $Source: /cvsroot/tack/Ack/plat/linux386/libsys/isatty.c,v $
+ * $State: Exp $
+ * $Revision: 1.1 $
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+
+int isatty(int fd)
+{
+	return 0;
+}

plat/linux/libsys/kill.c

@@ -0,0 +1,14 @@
+/* $Source: /cvsroot/tack/Ack/plat/linux386/libsys/kill.c,v $
+ * $State: Exp $
+ * $Revision: 1.1 $
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include "libsys.h"
+
+int kill(pid_t pid, int signum)
+{
+	return _syscall(__NR_kill, pid, signum, 0);
+}

plat/linux/libsys/libsys.h

@@ -0,0 +1,15 @@
+/* $Source: /cvsroot/tack/Ack/plat/linux386/libsys/libsys.h,v $
+ * $State: Exp $
+ * $Revision: 1.1 $
+ */
+
+#ifndef LIBSYS_H
+#define LIBSYS_H
+
+#include "syscalls.h"
+
+typedef unsigned long quad;
+
+extern quad _syscall(int op, quad p1, quad p2, quad p3); 
+
+#endif

plat/linux/libsys/lseek.c

@@ -0,0 +1,14 @@
+/* $Source: /cvsroot/tack/Ack/plat/linux386/libsys/lseek.c,v $
+ * $State: Exp $
+ * $Revision: 1.1 $
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include "libsys.h"
+
+off_t lseek(int fd, off_t offset, int whence)
+{
+	return _syscall(__NR_lseek, fd, offset, whence);
+}

plat/linux/libsys/open.c

@@ -0,0 +1,25 @@
+/* $Source: /cvsroot/tack/Ack/plat/linux386/libsys/open.c,v $
+ * $State: Exp $
+ * $Revision: 1.1 $
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include "libsys.h"
+
+int open(const char* path, int access, ...)
+{
+	int mode = 0;
+	
+	if (access & O_CREAT)
+	{
+		va_list ap;
+		va_start(ap, access);
+		mode = va_arg(ap, int);
+		va_end(ap);
+	}
+	
+	return _syscall(__NR_open, (quad) path, access, mode);
+}

plat/linux/libsys/read.c

@@ -0,0 +1,14 @@
+/* $Source: /cvsroot/tack/Ack/plat/linux386/libsys/read.c,v $
+ * $State: Exp $
+ * $Revision: 1.1 $
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include "libsys.h"
+
+int read(int fd, void* buffer, size_t count)
+{
+	return _syscall(__NR_read, fd, (quad) buffer, count);
+}

plat/linux/libsys/sbrk.c

@@ -0,0 +1,39 @@
+/* $Source$
+ * $State$
+ * $Revision$
+ */
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include "libsys.h"
+
+#define	OUT_OF_MEMORY (void*)(-1)	/* sbrk returns this on failure */
+
+static char* current = NULL;
+ 
+void* sbrk(intptr_t increment)
+{
+	char* old;
+	char* new;
+	char* actual;
+	
+	if (!current)
+		current = (char*) _syscall(__NR_brk, 0, 0, 0);
+
+	if (increment == 0)
+		return current;
+		
+	old = current;
+	new = old + increment;
+
+	actual = (char*) _syscall(__NR_brk, (quad) new, 0, 0);
+	if (actual < new)
+	{
+		errno = ENOMEM;
+		return OUT_OF_MEMORY;
+	}
+		
+	current = actual;
+	return old;
+}

plat/linux/libsys/signal.c

@@ -0,0 +1,14 @@
+/* $Source: /cvsroot/tack/Ack/plat/linux386/libsys/signal.c,v $
+ * $State: Exp $
+ * $Revision: 1.1 $
+ */
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <signal.h>
+#include "libsys.h"
+
+sighandler_t signal(int signum, sighandler_t handler)
+{
+	return (sighandler_t) _syscall(__NR_signal, signum, (quad) handler, 0);
+}

plat/linux/libsys/syscalls.h

@@ -0,0 +1,328 @@
+/* $Source: /cvsroot/tack/Ack/plat/linux386/libsys/syscalls.h,v $
+* $State: Exp $
+* $Revision: 1.1 $
+*/
+
+#ifndef SYSCALLS_H
+#define SYSCALLS_H
+
+/* Linux system calls. */
+
+#define __NR_restart_syscall 0
+#define __NR_exit 1
+#define __NR_fork 2
+#define __NR_read 3
+#define __NR_write 4
+#define __NR_open 5
+#define __NR_close 6
+#define __NR_waitpid 7
+#define __NR_creat 8
+#define __NR_link 9
+#define __NR_unlink 10
+#define __NR_execve 11
+#define __NR_chdir 12
+#define __NR_time 13
+#define __NR_mknod 14
+#define __NR_chmod 15
+#define __NR_lchown 16
+#define __NR_break 17
+#define __NR_oldstat 18
+#define __NR_lseek 19
+#define __NR_getpid 20
+#define __NR_mount 21
+#define __NR_umount 22
+#define __NR_setuid 23
+#define __NR_getuid 24
+#define __NR_stime 25
+#define __NR_ptrace 26
+#define __NR_alarm 27
+#define __NR_oldfstat 28
+#define __NR_pause 29
+#define __NR_utime 30
+#define __NR_stty 31
+#define __NR_gtty 32
+#define __NR_access 33
+#define __NR_nice 34
+#define __NR_ftime 35
+#define __NR_sync 36
+#define __NR_kill 37
+#define __NR_rename 38
+#define __NR_mkdir 39
+#define __NR_rmdir 40
+#define __NR_dup 41
+#define __NR_pipe 42
+#define __NR_times 43
+#define __NR_prof 44
+#define __NR_brk 45
+#define __NR_setgid 46
+#define __NR_getgid 47
+#define __NR_signal 48
+#define __NR_geteuid 49
+#define __NR_getegid 50
+#define __NR_acct 51
+#define __NR_umount2 52
+#define __NR_lock 53
+#define __NR_ioctl 54
+#define __NR_fcntl 55
+#define __NR_mpx 56
+#define __NR_setpgid 57
+#define __NR_ulimit 58
+#define __NR_oldolduname 59
+#define __NR_umask 60
+#define __NR_chroot 61
+#define __NR_ustat 62
+#define __NR_dup2 63
+#define __NR_getppid 64
+#define __NR_getpgrp 65
+#define __NR_setsid 66
+#define __NR_sigaction 67
+#define __NR_sgetmask 68
+#define __NR_ssetmask 69
+#define __NR_setreuid 70
+#define __NR_setregid 71
+#define __NR_sigsuspend 72
+#define __NR_sigpending 73
+#define __NR_sethostname 74
+#define __NR_setrlimit 75
+#define __NR_getrlimit 76 /* Back compatible 2Gig limited rlimit */
+#define __NR_getrusage 77
+#define __NR_gettimeofday 78
+#define __NR_settimeofday 79
+#define __NR_getgroups 80
+#define __NR_setgroups 81
+#define __NR_select 82
+#define __NR_symlink 83
+#define __NR_oldlstat 84
+#define __NR_readlink 85
+#define __NR_uselib 86
+#define __NR_swapon 87
+#define __NR_reboot 88
+#define __NR_readdir 89
+#define __NR_mmap 90
+#define __NR_munmap 91
+#define __NR_truncate 92
+#define __NR_ftruncate 93
+#define __NR_fchmod 94
+#define __NR_fchown 95
+#define __NR_getpriority 96
+#define __NR_setpriority 97
+#define __NR_profil 98
+#define __NR_statfs 99
+#define __NR_fstatfs 100
+#define __NR_ioperm 101
+#define __NR_socketcall 102
+#define __NR_syslog 103
+#define __NR_setitimer 104
+#define __NR_getitimer 105
+#define __NR_stat 106
+#define __NR_lstat 107
+#define __NR_fstat 108
+#define __NR_olduname 109
+#define __NR_iopl 110
+#define __NR_vhangup 111
+#define __NR_idle 112
+#define __NR_vm86old 113
+#define __NR_wait4 114
+#define __NR_swapoff 115
+#define __NR_sysinfo 116
+#define __NR_ipc 117
+#define __NR_fsync 118
+#define __NR_sigreturn 119
+#define __NR_clone 120
+#define __NR_setdomainname 121
+#define __NR_uname 122
+#define __NR_modify_ldt 123
+#define __NR_adjtimex 124
+#define __NR_mprotect 125
+#define __NR_sigprocmask 126
+#define __NR_create_module 127
+#define __NR_init_module 128
+#define __NR_delete_module 129
+#define __NR_get_kernel_syms 130
+#define __NR_quotactl 131
+#define __NR_getpgid 132
+#define __NR_fchdir 133
+#define __NR_bdflush 134
+#define __NR_sysfs 135
+#define __NR_personality 136
+#define __NR_afs_syscall 137 /* Syscall for Andrew File System */
+#define __NR_setfsuid 138
+#define __NR_setfsgid 139
+#define __NR__llseek 140
+#define __NR_getdents 141
+#define __NR__newselect 142
+#define __NR_flock 143
+#define __NR_msync 144
+#define __NR_readv 145
+#define __NR_writev 146
+#define __NR_getsid 147
+#define __NR_fdatasync 148
+#define __NR__sysctl 149
+#define __NR_mlock 150
+#define __NR_munlock 151
+#define __NR_mlockall 152
+#define __NR_munlockall 153
+#define __NR_sched_setparam 154
+#define __NR_sched_getparam 155
+#define __NR_sched_setscheduler 156
+#define __NR_sched_getscheduler 157
+#define __NR_sched_yield 158
+#define __NR_sched_get_priority_max 159
+#define __NR_sched_get_priority_min 160
+#define __NR_sched_rr_get_interval 161
+#define __NR_nanosleep 162
+#define __NR_mremap 163
+#define __NR_setresuid 164
+#define __NR_getresuid 165
+#define __NR_vm86 166
+#define __NR_query_module 167
+#define __NR_poll 168
+#define __NR_nfsservctl 169
+#define __NR_setresgid 170
+#define __NR_getresgid 171
+#define __NR_prctl 172
+#define __NR_rt_sigreturn 173
+#define __NR_rt_sigaction 174
+#define __NR_rt_sigprocmask 175
+#define __NR_rt_sigpending 176
+#define __NR_rt_sigtimedwait 177
+#define __NR_rt_sigqueueinfo 178
+#define __NR_rt_sigsuspend 179
+#define __NR_pread64 180
+#define __NR_pwrite64 181
+#define __NR_chown 182
+#define __NR_getcwd 183
+#define __NR_capget 184
+#define __NR_capset 185
+#define __NR_sigaltstack 186
+#define __NR_sendfile 187
+#define __NR_getpmsg 188/* some people actually want streams */
+#define __NR_putpmsg 189/* some people actually want streams */
+#define __NR_vfork 190
+#define __NR_ugetrlimit 191/* SuS compliant getrlimit */
+#define __NR_mmap2 192
+#define __NR_truncate64 193
+#define __NR_ftruncate64 194
+#define __NR_stat64 195
+#define __NR_lstat64 196
+#define __NR_fstat64 197
+#define __NR_lchown32 198
+#define __NR_getuid32 199
+#define __NR_getgid32 200
+#define __NR_geteuid32 201
+#define __NR_getegid32 202
+#define __NR_setreuid32 203
+#define __NR_setregid32 204
+#define __NR_getgroups32 205
+#define __NR_setgroups32 206
+#define __NR_fchown32 207
+#define __NR_setresuid32 208
+#define __NR_getresuid32 209
+#define __NR_setresgid32 210
+#define __NR_getresgid32 211
+#define __NR_chown32 212
+#define __NR_setuid32 213
+#define __NR_setgid32 214
+#define __NR_setfsuid32 215
+#define __NR_setfsgid32 216
+#define __NR_pivot_root 217
+#define __NR_mincore 218
+#define __NR_madvise 219
+#define __NR_getdents64 220
+#define __NR_fcntl64 221
+#define __NR_gettid 224
+#define __NR_readahead 225
+#define __NR_setxattr 226
+#define __NR_lsetxattr 227
+#define __NR_fsetxattr 228
+#define __NR_getxattr 229
+#define __NR_lgetxattr 230
+#define __NR_fgetxattr 231
+#define __NR_listxattr 232
+#define __NR_llistxattr 233
+#define __NR_flistxattr 234
+#define __NR_removexattr 235
+#define __NR_lremovexattr 236
+#define __NR_fremovexattr 237
+#define __NR_tkill 238
+#define __NR_sendfile64 239
+#define __NR_futex 240
+#define __NR_sched_setaffinity 241
+#define __NR_sched_getaffinity 242
+#define __NR_set_thread_area 243
+#define __NR_get_thread_area 244
+#define __NR_io_setup 245
+#define __NR_io_destroy 246
+#define __NR_io_getevents 247
+#define __NR_io_submit 248
+#define __NR_io_cancel 249
+#define __NR_fadvise64 250
+#define __NR_exit_group 252
+#define __NR_lookup_dcookie 253
+#define __NR_epoll_create 254
+#define __NR_epoll_ctl 255
+#define __NR_epoll_wait 256
+#define __NR_remap_file_pages 257
+#define __NR_set_tid_address 258
+#define __NR_timer_create 259
+#define __NR_timer_settime (__NR_timer_create+1)
+#define __NR_timer_gettime (__NR_timer_create+2)
+#define __NR_timer_getoverrun (__NR_timer_create+3)
+#define __NR_timer_delete (__NR_timer_create+4)
+#define __NR_clock_settime (__NR_timer_create+5)
+#define __NR_clock_gettime (__NR_timer_create+6)
+#define __NR_clock_getres (__NR_timer_create+7)
+#define __NR_clock_nanosleep (__NR_timer_create+8)
+#define __NR_statfs64 268
+#define __NR_fstatfs64 269
+#define __NR_tgkill 270
+#define __NR_utimes 271
+#define __NR_fadvise64_64 272
+#define __NR_vserver 273
+#define __NR_mbind 274
+#define __NR_get_mempolicy 275
+#define __NR_set_mempolicy 276
+#define __NR_mq_open 277
+#define __NR_mq_unlink (__NR_mq_open+1)
+#define __NR_mq_timedsend (__NR_mq_open+2)
+#define __NR_mq_timedreceive (__NR_mq_open+3)
+#define __NR_mq_notify (__NR_mq_open+4)
+#define __NR_mq_getsetattr (__NR_mq_open+5)
+#define __NR_kexec_load 283
+#define __NR_waitid 284
+#define __NR_add_key 286
+#define __NR_request_key 287
+#define __NR_keyctl 288
+#define __NR_ioprio_set 289
+#define __NR_ioprio_get 290
+#define __NR_inotify_init 291
+#define __NR_inotify_add_watch 292
+#define __NR_inotify_rm_watch 293
+#define __NR_migrate_pages 294
+#define __NR_openat 295
+#define __NR_mkdirat 296
+#define __NR_mknodat 297
+#define __NR_fchownat 298
+#define __NR_futimesat 299
+#define __NR_fstatat64 300
+#define __NR_unlinkat 301
+#define __NR_renameat 302
+#define __NR_linkat 303
+#define __NR_symlinkat 304
+#define __NR_readlinkat 305
+#define __NR_fchmodat 306
+#define __NR_faccessat 307
+#define __NR_pselect6 308
+#define __NR_ppoll 309
+#define __NR_unshare 310
+#define __NR_set_robust_list 311
+#define __NR_get_robust_list 312
+#define __NR_splice 313
+#define __NR_sync_file_range 314
+#define __NR_tee 315
+#define __NR_vmsplice 316
+
+#define concat(x, y) x##y
+#define MAPPED_SYSCALL(p, n) .define concat(p,n); concat(p,n): xor eax, eax; movb al, concat(__NR_,n); jmp __mapped_syscall
+
+#endif

plat/linux/libsys/write.c

@@ -0,0 +1,14 @@
+/* $Source: /cvsroot/tack/Ack/plat/linux386/libsys/write.c,v $
+ * $State: Exp $
+ * $Revision: 1.1 $
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include "libsys.h"
+
+int write(int fd, void* buffer, size_t count)
+{
+	return _syscall(__NR_write, fd, (quad) buffer, count);
+}