musl/arch/sh/crt_arch.h
Rich Felker 4fcb48275a generalize sh entry point asm not to assume call dests fit in 12 bits
this assumption is borderline-unsafe to begin with, and fails badly
with -ffunction-sections since the linker can move the callee
arbitrarily far away when it lies in a different section.
2015-11-02 18:11:36 -05:00

79 lines
1.3 KiB
C

#ifdef __SH_FDPIC__
__asm__(
".text \n"
".global " START " \n"
START ": \n"
" tst r8, r8 \n"
" bf 1f \n"
" mov #68, r3 \n"
" add r3, r3 \n"
" mov #8, r4 \n"
" swap.w r4, r4 \n"
" trapa #31 \n"
" nop \n"
" nop \n"
" nop \n"
" nop \n"
"1: nop \n"
#ifndef SHARED
" mov r8, r4 \n"
" mova 1f, r0 \n"
" mov.l 1f, r5 \n"
" mov.l 1f+4, r6 \n"
" add r0, r5 \n"
" mov.l 4f, r1 \n"
"5: bsrf r1 \n"
" add r0, r6 \n"
" mov r0, r12 \n"
#endif
" mov r10, r5 \n"
" mov r15, r4 \n"
" mov.l r9, @-r15 \n"
" mov.l r8, @-r15 \n"
" mov #-16, r0 \n"
" mov.l 2f, r1 \n"
"3: bsrf r1 \n"
" and r0, r15 \n"
".align 2 \n"
"1: .long __ROFIXUP_LIST__@PCREL \n"
" .long __ROFIXUP_END__@PCREL + 4 \n"
"2: .long " START "_c@PCREL - (3b+4-.) \n"
#ifndef SHARED
"4: .long __fdpic_fixup@PCREL - (5b+4-.) \n"
#endif
);
#ifndef SHARED
#include "fdpic_crt.h"
#endif
#else
__asm__(
".text \n"
".global " START " \n"
START ": \n"
" mova 1f, r0 \n"
" mov.l 1f, r5 \n"
" add r0, r5 \n"
" mov r15, r4 \n"
" mov #-16, r0 \n"
" mov.l 2f, r1 \n"
"3: bsrf r1 \n"
" and r0, r15 \n"
".align 2 \n"
".weak _DYNAMIC \n"
".hidden _DYNAMIC \n"
"1: .long _DYNAMIC-. \n"
"2: .long " START "_c@PCREL - (3b+4-.) \n"
);
#endif
/* used by gcc for switching the FPU between single and double precision */
#ifdef SHARED
__attribute__((__visibility__("hidden")))
#endif
const unsigned long __fpscr_values[2] = { 0, 0x80000 };