diff options
Diffstat (limited to 'gcc/config/ia64/crtbegin.asm')
| -rw-r--r-- | gcc/config/ia64/crtbegin.asm | 128 |
1 files changed, 121 insertions, 7 deletions
diff --git a/gcc/config/ia64/crtbegin.asm b/gcc/config/ia64/crtbegin.asm index b77ad98..d44df5b 100644 --- a/gcc/config/ia64/crtbegin.asm +++ b/gcc/config/ia64/crtbegin.asm @@ -26,12 +26,17 @@ __CTOR_LIST__: __DTOR_LIST__: data8 -1 +.section .IA_64.unwind +__EH_FRAME_BEGIN__: + .section .sdata +5: data8 @segrel(6f) .type dtor_ptr#,@object .size dtor_ptr#,8 dtor_ptr: data8 __DTOR_LIST__# + 8 +/* A handle for __cxa_finalize to manage c++ local destructors. */ .global __dso_handle# .type __dso_handle#,@object .size __dso_handle#,8 @@ -45,6 +50,16 @@ __dso_handle: data8 0 #endif +/* The frame object. */ +/* ??? How can we rationally keep this size correct? */ + +.section .bss + .type frame_object#,@object + .size frame_object#,56 + .align 8 +frame_object: + .zero 56 + /* * Fragment of the ELF _fini routine that invokes our dtor cleanup. * @@ -65,38 +80,55 @@ __dso_handle: ;; } -.text +/* + * Fragment of the ELF _init routine that sets up the frame info. + */ + +.section .init,"ax","progbits" + { .mfb + st8 [r12] = gp, -16 + br.call.sptk.many b0 = __do_frame_setup# + ;; + } + { .mmi + adds r12 = 16, r12 + ;; + ld8 gp = [r12] + ;; + } +.section .text .align 16 .proc __do_global_dtors_aux# - __do_global_dtors_aux: #ifndef SHARED { .mii - alloc loc2 = ar.pfs, 0, 3, 0, 0 + alloc loc3 = ar.pfs, 0, 4, 1, 0 addl loc0 = @gprel(dtor_ptr#), gp mov loc1 = b0 } + mov loc2 = gp #else /* if (__cxa_finalize) __cxa_finalize(__dso_handle) */ { .mii - alloc loc2 = ar.pfs, 1, 3, 0, 0 + alloc loc3 = ar.pfs, 0, 4, 1, 0 addl loc0 = @gprel(dtor_ptr#), gp addl r16 = @ltoff(@fptr(__cxa_finalize#)), gp ;; } + mov loc2 = gp { .mmi ld8 r16 = [r16] ;; - addl r32 = @ltoff(__dso_handle#), gp + addl out0 = @ltoff(__dso_handle#), gp cmp.ne p7, p0 = r0, r16 ;; } { .mmi - ld8 r32 = [r32] + ld8 out0 = [out0] (p7) ld8 r18 = [r16], 8 mov loc1 = b0 ;; @@ -139,9 +171,36 @@ __do_global_dtors_aux: cmp.ne p6, p0 = r0, r16 (p6) br.cond.sptk.few 0b } + mov gp = loc2 + ;; + /* + if (__deregister_frame_info) + __deregister_frame_info(__EH_FRAME_BEGIN__) + */ + { .mii + addl r16 = @ltoff(@fptr(__deregister_frame_info#)), gp + addl out0 = @ltoff(__EH_FRAME_BEGIN__#), gp + ;; + } + { .mmi + ld8 r16 = [r16] + ld8 out0 = [out0] + ;; + } + { .mmi + cmp.ne p7, p0 = r0, r16 + ;; +(p7) ld8 r18 = [r16], 8 + ;; + } + { .mib +(p7) ld8 gp = [r16] +(p7) mov b6 = r18 +(p7) br.call.sptk.many b0 = b6 + } { .mii mov b0 = loc1 - mov ar.pfs = loc2 + mov ar.pfs = loc3 } { .bbb br.ret.sptk.many b0 @@ -149,6 +208,61 @@ __do_global_dtors_aux: } .endp __do_global_dtors_aux# + .proc __do_frame_setup# +__do_frame_setup: + /* + if (__register_frame_info) + __register_frame_info(__EH_FRAME_BEGIN__) + */ + { .mii + alloc loc3 = ar.pfs, 0, 4, 2, 0 + addl r16 = @ltoff(@fptr(__register_frame_info#)), gp + addl out0 = @ltoff(__EH_FRAME_BEGIN__#), gp + ;; + } + addl out1 = @ltoff(frame_object#), gp + ;; + /* frame_object.pc_base = segment_base_offset; + pc_base is at offset 0 within frame_object. */ +6: + mov loc0 = ip + addl loc1 = @gprel(5b), gp + ;; + ld8 loc1 = [loc1] + ld8 out1 = [out1] + ;; + sub loc2 = loc0, loc1 + ;; + st8 [out1] = loc2 + { .mmi + ld8 r16 = [r16] + ld8 out0 = [out0] + mov loc0 = b0 + ;; + } + { .mmi + cmp.ne p7, p0 = r0, r16 + ;; +(p7) ld8 r18 = [r16], 8 + ;; + } + { .mib +(p7) ld8 gp = [r16] +(p7) mov b6 = r18 +(p7) br.call.sptk.many b0 = b6 + } + { .mii + mov b0 = loc0 + mov ar.pfs = loc3 + } + { .bbb + br.ret.sptk.many b0 + ;; + } + .endp __do_frame_setup# + #ifdef SHARED .weak __cxa_finalize# #endif +.weak __deregister_frame_info# +.weak __register_frame_info# |