diff options
Diffstat (limited to 'ldso/ldso/arc/resolve.S')
| -rw-r--r-- | ldso/ldso/arc/resolve.S | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/ldso/ldso/arc/resolve.S b/ldso/ldso/arc/resolve.S new file mode 100644 index 000000000..891f66b97 --- /dev/null +++ b/ldso/ldso/arc/resolve.S @@ -0,0 +1,57 @@ +/* + * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com) + * + * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball. + */ + +#include <sysdep.h> +#include <sys/syscall.h> + +; Save the registers which resolver could possibly clobber +; r0-r9: args to the function - symbol being resolved +; r10-r12 are already clobbered by PLTn, PLT0 thus neednot be saved + +.macro SAVE_CALLER_SAVED + push_s r0 + push_s r1 + push_s r2 + push_s r3 + st.a r4, [sp, -4] + st.a r5, [sp, -4] + st.a r6, [sp, -4] + st.a r7, [sp, -4] + st.a r8, [sp, -4] + st.a r9, [sp, -4] + push_s blink +.endm + +.macro RESTORE_CALLER_SAVED_BUT_R0 + ld.ab blink,[sp, 4] + ld.ab r9, [sp, 4] + ld.ab r8, [sp, 4] + ld.ab r7, [sp, 4] + ld.ab r6, [sp, 4] + ld.ab r5, [sp, 4] + ld.ab r4, [sp, 4] + pop_s r3 + pop_s r2 + pop_s r1 +.endm + +; Upon entry, PLTn, which led us here, sets up the following regs +; r11 = Module info (tpnt pointer as expected by resolver) +; r12 = PC of the PLTn itself - needed by resolver to find +; corresponding .rela.plt entry + +ENTRY(_dl_linux_resolve) + ; args to func being resolved, which resolver might clobber + SAVE_CALLER_SAVED + + mov_s r1, r12 + bl.d _dl_linux_resolver + mov r0, r11 + + RESTORE_CALLER_SAVED_BUT_R0 + j_s.d [r0] ; r0 has resolved function addr + pop_s r0 ; restore first arg to resolved call +END(_dl_linux_resolve) |