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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 by Wolfgang Solfrank. * 4. Neither the name of the University nor the names of its contributors * may 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. */ /* * arm run-time link editor entry points. */ #include #include .text /* * _rtl(int version, struct crt_ldso *crtp) */ .align 0 .type _rtl,#function _rtl: @@ crt0 calls us here mov ip, sp @@ Allocate stack frame stmfd sp!, {sl, fp, ip, lr, pc} sub fp, ip, #4 ldr r3, [r1, #0] @@ base address of ld.so (first field) @@ setup arguments for rtld() ldr sl, GOTaddr @@ get pc-rel offset for GOT add sl, pc, sl @@ here is the GOT L1: ldr r2, DYNAMICaddr ldr r2, [sl, r2] @@ 1st entry in GOT is our __DYNAMIC add r2, r2, r3 @@ add load address ldr lr, rtldaddr @@ get GOT offset for function ldr lr, [sl, lr] @@ get function address add r3, lr, r3 @@ and relocate mov lr, pc mov pc, r3 @@ _rtld(version, crtp, DYNAMIC) ldmea fp, {sl, fp, ip, pc} .align 0 GOTaddr: .word __GLOBAL_OFFSET_TABLE_ + (. - (L1+4) ) DYNAMICaddr: .word __DYNAMIC rtldaddr: .word _rtld @@ First call to a procedure generally comes through here for @@ binding. ENTRY(binder_entry) stmfd sp!, {r0-fp, ip, lr, pc} @@ save all regs in standard frame @@ (ip and lr to be fixed later) add fp, sp, #(15-1)*4 @@ get new fp add r0, fp, #4 @@ compute old sp str r0, [fp, #-8] @@ fixup saved ip sub r0, ip, #(8+12) @@ make it point to the jmpslot bl _binder str r0, [fp] @@ return value from _binder() @@ == actual address of function ldmfa fp, {r0-fp, sp, lr, pc} @@ restore regs @ 1.1 log @Add support for PIC code. Add support for ld.so @ text @d1 1 a1 1 /* $NetBSD$ */ @