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@@ -1,9 +1,110 @@
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/*
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$Id$
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*/
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+ .section ".text"
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+ .align 4
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+ .global _start
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+ .type _start,#function
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+_start:
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+ /* Terminate the stack frame, and reserve space for functions to
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+ drop their arguments. */
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+ mov %g0, %fp
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+ sub %sp, 6*4, %sp
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+
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+ /* Extract the arguments and environment as encoded on the stack. The
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+ argument info starts after one register window (16 words) past the SP. */
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+ ld [%sp+22*4], %o2
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+ sethi %hi(operatingsystem_parameter_argc),%o1
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+ or %o1,%lo(operatingsystem_parameter_argc),%o1
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+ st %o2, [%o1]
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+
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+ add %sp, 23*4, %o0
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+ sethi %hi(operatingsystem_parameter_argv),%o1
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+ or %o1,%lo(operatingsystem_parameter_argv),%o1
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+ st %o0, [%o1]
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+
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+ /* envp=(argc+1)*4+argv */
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+ inc %o2
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+ sll %o2, 2, %o2
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+ add %o2, %o0, %o2
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+ sethi %hi(operatingsystem_parameter_envp),%o1
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+ or %o1,%lo(operatingsystem_parameter_envp),%o1
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+ st %o2, [%o1]
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+
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+ /* reload the addresses for C startup code */
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+ ld [%sp+22*4], %o1
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+ add %sp, 23*4, %o2
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+
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+
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+ /* Load the addresses of the user entry points. */
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+ sethi %hi(main_stub), %o0
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+ sethi %hi(_init), %o3
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+ sethi %hi(_fini), %o4
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+ or %o0, %lo(main_stub), %o0
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+ or %o3, %lo(_init), %o3
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+ or %o4, %lo(_fini), %o4
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+
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+ /* When starting a binary via the dynamic linker, %g1 contains the
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+ address of the shared library termination function, which will be
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+ registered with atexit(). If we are statically linked, this will
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+ be NULL. */
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+ mov %g1, %o5
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+
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+ /* Let libc do the rest of the initialization, and call main. */
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+ call __libc_start_main
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+ nop
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+
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+ /* Die very horribly if exit returns. */
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+ unimp
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+
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+ .size _start, .-_start
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+
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+ main_stub:
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+ /* Initialize gmon */
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+ sethi %hi(_start), %o0
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+ sethi %hi(_etext), %o1
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+ or %o0, %lo(_start), %o0
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+ or %o1, %lo(_etext), %o1
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+ call monstartup
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+ nop
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+
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+ sethi %hi(_mcleanup), %o0
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+ or %o0, %lo(_mcleanup), %o0
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+ call atexit
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+ nop
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+
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+ /* start the program */
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+ call PASCALMAIN
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+ nop
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+
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+ ba _haltproc
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+ nop
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+
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+ .globl _haltproc
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+ .type _haltproc,@function
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+ _haltproc:
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+ mov 1, %g1 /* "exit" system call */
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+ sethi %hi(operatingsystem_result),%o0
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+ or %o0,%lo(operatingsystem_result),%o0
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+ ldsh [%o0], %o0 /* give exit status to parent process*/
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+ ta 0x10 /* dot the system call */
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+ nop /* delay slot */
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+ /* Die very horribly if exit returns. */
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+ unimp
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+
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+.data
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+
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+ .comm ___fpc_brk_addr,4 /* heap management */
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+
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+ .comm operatingsystem_parameter_envp,4
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+ .comm operatingsystem_parameter_argc,4
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+ .comm operatingsystem_parameter_argv,4
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/*
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$Log$
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- Revision 1.3 2003-05-23 21:09:14 florian
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+ Revision 1.4 2004-11-05 21:36:36 florian
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+ * initial implementation
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+
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+ Revision 1.3 2003/05/23 21:09:14 florian
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+ dummy implementation readded to satisfy makefile
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*/
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florian