Commit initial alpha bits, to facilitate in-tree dev.

This code is not yet working.

1 files changed, 401 insertions, 0 deletions

diff --git a/libexec/ld.so/alpha/rtld_machine.c b/libexec/ld.so/alpha/rtld_machine.c
new file mode 100644
index 00000000000..3ce9c1dc4d0
--- /dev/null
+++ b/libexec/ld.so/alpha/rtld_machine.c
@@ -0,0 +1,401 @@
+/*	$OpenBSD: rtld_machine.c,v 1.1 2001/05/14 22:18:21 niklas Exp $ */
+
+/*
+ * Copyright (c) 1999 Dale Rahn
+ * Copyright (c) 2001 Niklas Hallqvist
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed under OpenBSD by
+ *	Dale Rahn.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#define _DYN_LOADER
+
+#include <sys/types.h>
+#include <sys/cdefs.h>
+
+#include <machine/elf_machdep.h>
+
+#include <nlist.h>
+#include <link.h>
+
+#include "syscall.h"
+#include "archdep.h"
+#include "resolve.h"
+
+void
+_dl_bcopy(void *src, void *dest, int size)
+{
+	unsigned char *psrc, *pdest;
+	int i;
+	psrc = src;
+	pdest = dest;
+	for (i = 0; i < size; i++) {
+		pdest[i] = psrc[i];
+	}
+}
+
+int
+_dl_md_reloc(elf_object_t *object, int rel, int relasz)
+{
+	int	i;
+	int	numrela;
+	int	fails = 0;
+	Elf64_Addr loff;
+	Elf64_Rela  *relas;
+	/* for jmp table relocations */
+	Elf64_Addr *pltcall;
+	Elf64_Addr *plttable;
+
+	Elf64_Addr * first_rela;
+
+	loff   = object->load_offs;
+	numrela = object->Dyn.info[relasz] / sizeof(Elf64_Rela);
+	relas = (Elf64_Rela *)(object->Dyn.info[rel]);
+
+#ifdef DL_PRINTF_DEBUG
+_dl_printf("loff 0x%lx object relocation size %x, numrela %x\n", loff,
+	object->Dyn.info[relasz], numrela);
+#endif
+
+	if((object->status & STAT_RELOC_DONE) || !relas) {
+		return(0);
+	}
+	/* for plt relocation usage */
+	if (object->Dyn.info[DT_JMPREL] != 0) {
+		/* resolver stub not set up */
+		Elf64_Addr val;
+
+		first_rela = (Elf64_Addr *)
+		(((Elf64_Rela *)(object->Dyn.info[DT_JMPREL]))->r_offset
+			+ loff);
+		/* Need to construct table to do jumps */
+		pltcall = (Elf64_Addr *)(first_rela) - 12;
+#ifdef DL_PRINTF_DEBUG
+_dl_printf("creating pltcall at %p\n", pltcall);
+_dl_printf("md_reloc( jumprel %p\n", first_rela );
+#endif
+		plttable = (Elf64_Addr *)
+			((Elf64_Addr)first_rela) + (2 *
+			(object->Dyn.info[DT_PLTRELSZ]/sizeof(Elf64_Rela))
+			);
+
+#ifdef DL_PRINTF_DEBUG
+_dl_printf("md_reloc:  plttbl size %x\n", 
+			(object->Dyn.info[DT_PLTRELSZ]/sizeof(Elf64_Rela))
+);
+_dl_printf("md_reloc: plttable %p\n", plttable);
+#endif
+	} else {
+		first_rela = NULL;
+	}
+
+	for(i = 0; i < numrela; i++, relas++) {
+		Elf64_Addr *r_addr = (Elf64_Addr *)(relas->r_offset + loff);
+		Elf64_Addr ooff;
+		const Elf64_Sym *sym, *this;
+		const char *symn;
+
+#if 0
+_dl_printf("%d offset 0x%lx info 0x%lx addend 0x%lx\n", i, relas->r_offset, relas->r_info, relas->r_addend);
+#endif
+
+		if(ELF64_R_SYM(relas->r_info) == 0xffffff) {
+			continue;
+		}
+
+		sym = object->dyn.symtab;
+		sym += ELF64_R_SYM(relas->r_info);
+		this = sym;
+		symn = object->dyn.strtab + sym->st_name;
+
+		if(ELF64_R_SYM(relas->r_info) &&
+		   !(ELF64_ST_BIND(sym->st_info) == STB_LOCAL &&
+		     ELF64_ST_TYPE (sym->st_info) == STT_NOTYPE)) {
+			
+			ooff = _dl_find_symbol(symn, _dl_objects, &this, 0, 1);
+			if(!this && ELF64_ST_BIND(sym->st_info) == STB_GLOBAL) {
+				_dl_printf("%s:"
+					" %s :can't resolve reference '%s'\n",
+					_dl_progname, object->load_name,
+					symn);
+				fails++;
+			}
+
+		}
+
+#if 0
+_dl_printf("reloc %d\n", ELF64_R_TYPE(relas->r_info));
+#endif
+		switch(ELF64_R_TYPE(relas->r_info)) {
+#if 1
+		case R_TYPE(REFQUAD):
+			if(ELF64_ST_BIND(sym->st_info) == STB_LOCAL &&
+			   (ELF64_ST_TYPE(sym->st_info) == STT_SECTION ||
+			    ELF64_ST_TYPE(sym->st_info) == STT_NOTYPE) ) {
+				*r_addr = ooff + relas->r_addend;
+			} else {
+				*r_addr = ooff + this->st_value +
+					relas->r_addend;
+			}
+			break;
+#endif
+		case R_TYPE(RELATIVE):
+#if 0
+_dl_printf("sym info %d r_addr %p relas %p\n", sym->st_info, r_addr, relas);
+#endif
+			if(ELF64_ST_BIND(sym->st_info) == STB_LOCAL &&
+			   (ELF64_ST_TYPE(sym->st_info) == STT_SECTION ||
+			    ELF64_ST_TYPE(sym->st_info) == STT_NOTYPE) ) {
+#if 0
+_dl_printf("addend 0x%lx\n", relas->r_addend);
+_dl_printf("*r_addr 0x%lx\n", *r_addr);
+#endif
+				*r_addr = loff + relas->r_addend;
+#if 0
+_dl_printf("*r_addr 0x%lx\n", *r_addr);
+#endif
+
+#ifdef DL_PRINTF_DEBUG
+_dl_printf("rel1 r_addr %p val %lx loff %lx ooff %lx addend %lx\n", r_addr,
+loff + relas->r_addend, loff, ooff, relas->r_addend);
+#endif
+
+			} else {
+#if 0
+_dl_printf("this %p\n", this);
+#endif
+				*r_addr = loff + this->st_value +
+					relas->r_addend;
+			}
+			break;
+		case R_TYPE(JMP_SLOT):
+		   {
+			Elf64_Addr val = ooff + this->st_value +
+				relas->r_addend - (Elf64_Addr)r_addr;
+			if (!(((val & 0xfe000000) == 0x00000000) || 
+				((val &  0xfe000000) == 0xfe000000)))
+			{
+				int index;
+#ifdef DL_PRINTF_DEBUG
+_dl_printf(" ooff %lx, sym val %lx, addend %lx"
+	" r_addr %lx symn [%s] -> %x\n",
+	ooff, this->st_value, relas->r_addend,
+	r_addr, symn, val);
+#endif
+				/* if offset is > RELOC_24 deal with it */
+				index = (r_addr - first_rela) >> 1;
+
+				if (index > (2 << 14)) {
+
+					/* addis r11,r11,.PLTtable@ha*/
+					val = (index*4 >> 16) +
+						((index*4 & 0x00008000) >> 15);
+					r_addr[0] = 0x3d600000 | val;
+					val = (Elf64_Addr)pltcall -
+						(Elf64_Addr)&r_addr[2];
+					r_addr[1] = 0x396b0000 | val; 
+					val &= ~0xfc000000;
+					val |=  0x48000000;
+					r_addr[2] = val;
+
+				} else {
+#ifdef DL_PRINTF_DEBUG
+	_dl_printf("  index %d, pltcall %x r_addr %lx\n",
+		index, pltcall, r_addr);
+#endif
+
+					r_addr[0] = 0x39600000 | (index * 4);
+					val = (Elf64_Addr)pltcall -
+						(Elf64_Addr)&r_addr[1];
+					val &= ~0xfc000000;
+					val |=  0x48000000;
+					r_addr[1] = val;
+
+				}
+				_dl_dcbf(r_addr);
+				_dl_dcbf(&r_addr[2]);
+				val= ooff + this->st_value +
+					relas->r_addend;
+#ifdef DL_PRINTF_DEBUG
+		_dl_printf(" symn [%s] val 0x%x\n", symn, val);
+#endif
+				plttable[index] = val;
+			} else {
+				/* if the offset is small enough, 
+				 * branch directy to the dest
+				 */
+				val &= ~0xfc000000;
+				val |=  0x48000000;
+				*r_addr = val;	
+				_dl_dcbf(r_addr);
+			}
+		   }
+
+			break;
+		case R_TYPE(GLOB_DAT):
+			*r_addr = ooff + this->st_value + relas->r_addend;
+			break;
+#if 0
+#ifdef DL_PRINTF_DEBUG
+		/* should not be supported ??? */
+		case RELOC_REL24:
+			{
+			Elf64_Addr val = ooff + this->st_value +
+				relas->r_addend - (Elf64_Addr)r_addr;
+			if ((val & 0xfe000000 != 0) &&
+				(val & 0xfe000000 != 0xfe000000))
+			{
+				/* invalid offset */
+				_dl_exit(20);
+			}
+			val &= ~0xfc000003;
+			val |=  (*r_addr & 0xfc000003);
+			*r_addr = val;	
+				
+			_dl_dcbf(r_addr);
+			}
+#endif
+			break;
+		case RELOC_REL14_TAKEN:
+			/* val |= 1 << (31-10) XXX? */
+		case RELOC_REL14:
+		case RELOC_REL14_NTAKEN:
+			{
+			Elf64_Addr val = ooff + this->st_value +
+				relas->r_addend - (Elf64_Addr)r_addr;
+			if (((val & 0xffff8000) != 0) &&
+				((val & 0xffff8000) != 0xffff8000))
+			{
+				/* invalid offset */
+				_dl_exit(20);
+			}
+			val &= ~0xffff0003;
+			val |=  (*r_addr & 0xffff0003);
+			*r_addr = val;	
+#ifdef DL_PRINTF_DEBUG
+			_dl_printf("rel 14 %lx val %lx\n", 
+				r_addr, val);
+#endif
+				
+			_dl_dcbf(r_addr);
+			}
+			break;
+#endif
+		case R_TYPE(COPY):
+#ifdef DL_PRINTF_DEBUG
+			_dl_printf("copy r_addr %lx, sym %x [%s] size %d val %lx\n",
+				r_addr, sym, symn, sym->st_size,
+				(ooff + this->st_value+
+				relas->r_addend)
+
+				);
+#endif
+{
+	/* we need to find a symbol, that is not in the current object,
+	 * start looking at the beginning of the list, searching all objects
+	 * but _not_ the current object, first one found wins.
+	 */
+	elf_object_t *cobj;
+	const Elf64_Sym *cpysrc = NULL;
+	Elf64_Addr src_loff;
+	int size;
+	for (cobj = _dl_objects;
+		cobj != NULL && cpysrc == NULL;
+		cobj = cobj->next)
+	{
+		if (object != cobj) {
+
+			/* only look in this object */
+			src_loff = _dl_find_symbol(symn, cobj,
+				&cpysrc, 1, 1);
+		}
+	}
+	if (cpysrc == NULL) {
+		_dl_printf("symbol not found [%s] \n", symn);
+	} else {
+		size  = sym->st_size;
+		if (sym->st_size != cpysrc->st_size) {
+			_dl_printf("symbols size differ [%s] \n", symn);
+			size = sym->st_size < cpysrc->st_size ?
+				sym->st_size : cpysrc->st_size;
+		}
+#ifdef DL_PRINTF_DEBUG
+_dl_printf(" found other symbol at %x size %d\n", 
+		src_loff + cpysrc->st_value,  cpysrc->st_size);
+#endif
+		_dl_bcopy((void *)(src_loff + cpysrc->st_value),
+			(void *)(ooff + this->st_value+ relas->r_addend),
+			size);
+	}
+}
+			break;
+		case R_TYPE(NONE):
+			break;
+
+		default:
+			_dl_printf("%s:"
+				" %s: unsupported relocation '%s' %d at %lx\n",
+					_dl_progname, object->load_name, symn,
+					ELF64_R_TYPE(relas->r_info), r_addr );
+			_dl_exit(1);
+		}
+	}
+	object->status |= STAT_RELOC_DONE;
+#if 0
+_dl_printf("<\n");
+#endif
+	return(fails);
+}
+
+/*
+ *	Relocate the Global Offset Table (GOT). Currently we don't
+ *	do lazy evaluation here because the GNU linker doesn't
+ *	follow the ABI spec which says that if an external symbol
+ *	is referenced by other relocations than CALL16 and 26 it
+ *	should not be given a stub and have a zero value in the
+ *	symbol table. By not doing so, we can't use pointers to
+ *	external functions and use them in comparitions...
+ */
+void
+_dl_md_reloc_got(elf_object_t *object, int lazy)
+{
+	/* relocations all done via rela relocations above */
+}
+
+/* should not be defined here, but is is 32 for all powerpc 603-G4 */
+#define CACHELINESIZE 32
+void
+_dl_syncicache(char *from, size_t len)
+{
+        int l = len;
+	unsigned int off = 0;
+
+	while (off < len) {
+                off += CACHELINESIZE;
+        }
+}