t-m68hc11-gas (T_CPPFLAGS): Add _ctor and _dtor.
* config/m68hc11/t-m68hc11-gas (T_CPPFLAGS): Add _ctor and _dtor. * config/m68hc11/larith.asm (_exit): Split in several sub-sections merged by linker script to get a final _exit(). (__do_global_dtors): New for destructor handling in specific exit section. (__do_global_ctors): New for constructors in specific install section. (__map_data_section): Map data sections before running constructors. * config/m68hc11/m68hc11.h (INT_ASM_OP): Define to use .word. (CTORS_SECTION_ASM_OP): Define to put in readonly section. (DTORS_SECTION_ASM_OP): Likewise. (CTORS_SECTION_FUNCTION): Define to force a reference to __do_global_ctors. (DTORS_SECTION_FUNCTION): Likewise for __do_global_dtors. From-SVN: r44611
This commit is contained in:
Stephane Carrez
Stephane Carrez
parent
9ebeebda15
commit
70a5787eaa
@ -1,3 +1,19 @@
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2001-08-03 Stephane Carrez <Stephane.Carrez@worldnet.fr>
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* config/m68hc11/t-m68hc11-gas (T_CPPFLAGS): Add _ctor and _dtor.
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* config/m68hc11/larith.asm (_exit): Split in several sub-sections
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merged by linker script to get a final _exit().
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(__do_global_dtors): New for destructor handling in specific exit
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section.
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(__do_global_ctors): New for constructors in specific install section.
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(__map_data_section): Map data sections before running constructors.
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* config/m68hc11/m68hc11.h (INT_ASM_OP): Define to use .word.
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(CTORS_SECTION_ASM_OP): Define to put in readonly section.
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(DTORS_SECTION_ASM_OP): Likewise.
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(CTORS_SECTION_FUNCTION): Define to force a reference to
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__do_global_ctors.
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(DTORS_SECTION_FUNCTION): Likewise for __do_global_dtors.
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2001-08-03 Daniel Berlin <dan@cgsoftware.com>
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* ChangeLog: Fix date on previous ChangeLog entry for GCSE.
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@ -179,13 +179,26 @@ __premain:
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;;
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;; Exit operation. Just loop forever and wait for interrupts.
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;; (no other place to go)
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;; This operation is split in several pieces collected together by
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;; the linker script. This allows to support destructors at the
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;; exit stage while not impacting program sizes when there is no
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;; destructors.
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;;
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.sect .text
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.globl _exit
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;; _exit:
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;; *(.fini0) /* Beginning of finish code (_exit symbol). */
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;; *(.fini1) /* Place holder for applications. */
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;; *(.fini2) /* C++ destructors. */
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;; *(.fini3) /* Place holder for applications. */
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;; *(.fini4) /* Runtime exit. */
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;;
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.sect .fini0,"ax",@progbits
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.globl _exit
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.globl exit
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.weak exit
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exit:
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_exit:
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.sect .fini4,"ax",@progbits
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fatal:
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cli
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wai
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@ -1035,7 +1048,7 @@ A_low_B_low:
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#ifdef L_map_data
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.sect .install3,"ax",@progbits
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.sect .install2,"ax",@progbits
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.globl __map_data_section
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__map_data_section:
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@ -1063,7 +1076,7 @@ Done:
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#ifdef L_init_bss
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.sect .install3,"ax",@progbits
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.sect .install2,"ax",@progbits
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.globl __init_bss_section
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__init_bss_section:
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@ -1083,7 +1096,58 @@ Loop:
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Done:
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#endif
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#ifdef L_ctor
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; End of constructor table
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.sect .install3,"ax",@progbits
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.globl __do_global_ctors
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__do_global_ctors:
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; Start from the end - sizeof(void*)
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ldx #__CTOR_END__-2
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ctors_loop:
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cpx #__CTOR_LIST__
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blt ctors_done
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pshx
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ldx 0,x
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jsr 0,x
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pulx
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dex
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dex
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bra ctors_loop
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ctors_done:
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#endif
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#ifdef L_dtor
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.sect .fini3,"ax",@progbits
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.globl __do_global_dtors
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;;
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;; This piece of code is inserted in the _exit() code by the linker.
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;;
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__do_global_dtors:
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pshb ; Save exit code
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psha
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ldx #__DTOR_LIST__
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dtors_loop:
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cpx #__DTOR_END__
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bge dtors_done
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pshx
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ldx 0,x
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jsr 0,x
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pulx
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inx
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inx
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bra dtors_loop
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dtors_done:
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pula ; Restore exit code
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pulb
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#endif
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;-----------------------------------------
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; end required gcclib code
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;-----------------------------------------
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@ -1580,6 +1580,52 @@ do { \
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/* Output before uninitialized data. */
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#define BSS_SECTION_ASM_OP ("\t.sect\t.bss")
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/* This is the pseudo-op used to generate a reference to a specific
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symbol in some section. It is only used in machine-specific
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configuration files, typically only in ASM_OUTPUT_CONSTRUCTOR and
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ASM_OUTPUT_DESTRUCTOR. This is the same for all known svr4
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assemblers, except those in targets that don't use 32-bit pointers.
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Those should override INT_ASM_OP. Yes, the name of the macro is
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misleading. */
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#undef INT_ASM_OP
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#define INT_ASM_OP "\t.word\t"
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/* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
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Same as config/elfos.h but don't mark these section SHF_WRITE since
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there is no shared library problem. */
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#undef CTORS_SECTION_ASM_OP
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#define CTORS_SECTION_ASM_OP "\t.section\t.ctors,\"a\""
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#undef DTORS_SECTION_ASM_OP
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#define DTORS_SECTION_ASM_OP "\t.section\t.dtors,\"a\""
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#undef CTORS_SECTION_FUNCTION
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#define CTORS_SECTION_FUNCTION \
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void \
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ctors_section () \
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{ \
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if (in_section != in_ctors) \
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{ \
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fprintf (asm_out_file, "\t.globl\t__do_global_ctors\n"); \
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fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP); \
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in_section = in_ctors; \
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} \
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}
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#undef DTORS_SECTION_FUNCTION
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#define DTORS_SECTION_FUNCTION \
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void \
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dtors_section () \
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{ \
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if (in_section != in_dtors) \
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{ \
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fprintf (asm_out_file, "\t.globl\t__do_global_dtors\n"); \
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fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP); \
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in_section = in_dtors; \
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} \
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}
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/* This is how to begin an assembly language file. Most svr4 assemblers want
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at least a .file directive to come first, and some want to see a .version
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directive come right after that. Here we just establish a default
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@ -24,7 +24,8 @@ LIB1ASMFUNCS = _mulsi3 \
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_regs_d3_4 _regs_d5_6 _regs_d7_8 _regs_d9_16 _regs_d17_32 \
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_premain __exit _abort _cleanup \
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_adddi3 _subdi3 _notdi2 \
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_ashrhi3 _lshrhi3 _lshlhi3 _ashrqi3 _lshlqi3 _map_data _init_bss
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_ashrhi3 _lshrhi3 _lshlhi3 _ashrqi3 _lshlqi3 _map_data _init_bss \
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_ctor _dtor
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TARGET_LIBGCC2_CFLAGS = -DUSE_GAS -DIN_GCC
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