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https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-04-20 04:19:27 +02:00
102 lines
2.7 KiB
ActionScript
102 lines
2.7 KiB
ActionScript
.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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/* 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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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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/* 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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/* Save initial stackpointer */
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sethi %hi(__stkptr),%o1
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or %o1,%lo(__stkptr),%o1
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st %sp, [%o1]
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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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/* 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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/* 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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/* 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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/* Die very horribly if exit returns. */
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unimp
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.size _start, .-_start
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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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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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/* start the program */
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call PASCALMAIN
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nop
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ba _haltproc
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nop
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.globl _haltproc
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.type _haltproc,@function
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_haltproc:
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mov 188, %g1 /* "exit" system call */
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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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.data
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.comm __stkptr,4
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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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