/* * This function is _not_ called directly. It is jumped to (so no return * address is on the stack) when attempting to use a symbol that has not yet * been resolved. The first time a jump symbol (such as a function call inside * a shared library) is used (before it gets resolved) it will jump here to * _dl_linux_resolve. When we get called the stack looks like this: * reloc_entry * tpnt * * This function saves all the registers, puts a copy of reloc_entry and tpnt * on the stack (as function arguments) then make the function call * _dl_linux_resolver(tpnt, reloc_entry). _dl_linux_resolver() figures out * where the jump symbol is _really_ supposed to have jumped to and returns * that to us. Once we have that, we overwrite tpnt with this fixed up * address. We then clean up after ourselves, put all the registers back how we * found them, then we jump to the fixed up address, which is where the jump * symbol that got us here really wanted to jump to in the first place. * -Erik Andersen */ #define sl r10 #define fp r11 #define ip r12 .text .globl _dl_linux_resolve .type _dl_linux_resolve,%function .align 4; _dl_linux_resolve: stmdb sp!, {r0, r1, r2, r3, sl, fp} sub r1, ip, lr sub r1, r1, #4 add r1, r1, r1 ldr r0, [lr, #-4] mov r3,r0 bl _dl_linux_resolver mov ip, r0 ldmia sp!, {r0, r1, r2, r3, sl, fp, lr} mov pc,ip .size _dl_linux_resolve, .-_dl_linux_resolve
