* sysdeps/sparc/sparc32/elf.S: Rewrite for __libc_start_main. * sysdeps/sparc/sparc64/elf.S: Likewise.
* sysdeps/sparc/sparc32/elf.S: Rewrite for __libc_start_main. * sysdeps/sparc/sparc64/elf.S: Likewise. 1998-04-06 Richard Henderson <rth@cygnus.com>
This commit is contained in:
Richard Henderson
parent
deb2f929b5
commit
a55400166d
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@ -1,3 +1,8 @@
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1998-04-06 Richard Henderson <rth@cygnus.com>
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* sysdeps/sparc/sparc32/elf.S: Rewrite for __libc_start_main.
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* sysdeps/sparc/sparc64/elf.S: Likewise.
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1998-04-06 Richard Henderson <rth@cygnus.com>
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* sysdeps/unix/sysv/linux/sparc/sparc32/socket.S: Revert 03-01 change,
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@ -1,5 +1,5 @@
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/* Startup code for elf32-sparc
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Copyright (C) 1997 Free Software Foundation, Inc.
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Copyright (C) 1997, 1998 Free Software Foundation, Inc.
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Contributed by Richard Henderson <richard@gnu.ai.mit.edu>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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@ -31,56 +31,30 @@ _start:
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mov %g0, %fp
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sub %sp, 6*4, %sp
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/* Save %g1. When starting a binary via the dynamic linker, %g1
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contains the address of the shared library termination function,
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which we will register below with atexit() to be called by exit().
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If we are statically linked, this will be NULL. */
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/* Do essential libc initialization (sp points to argc, argv, and envp) */
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call __libc_init_first
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mov %g1, %l0
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/* Now that we have the proper stack frame, register library termination
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function, if there is any: */
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cmp %l0, 0
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beq 1f
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nop
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call atexit
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mov %l0, %o0
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1:
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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], %o0
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add %sp, 23*4, %o1
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sll %o0, 2, %o2
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add %o2, %o1, %o2
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sethi %hi(__environ), %g2
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add %o2, 4, %o2
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st %o2, [%g2+%lo(__environ)]
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ld [%sp+22*4], %o1
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add %sp, 23*4, %o2
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mov %o0, %l0 /* tuck them away */
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mov %o1, %l1
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/* Load the addresses of the user entry points. */
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sethi %hi(main), %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), %o0
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or %o3, %lo(_init), %o3
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or %o4, %lo(_fini), %o4
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/* Call _init, the entry point to our own .init section. */
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call _init
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mov %o2, %l2
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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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/* Register our .fini section with atexit. */
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sethi %hi(_fini), %o0
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call atexit
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add %o0, %lo(_fini), %o0
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/* Call the user's main and exit with its return value. */
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mov %l0, %o0
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mov %l1, %o1
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call main
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mov %l2, %o2
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call exit
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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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.size _start, .-_start
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@ -1,5 +1,5 @@
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/* Startup code for elf64-sparc
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Copyright (C) 1997 Free Software Foundation, Inc.
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Copyright (C) 1997, 1998 Free Software Foundation, Inc.
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Contributed by Richard Henderson <richard@gnu.ai.mit.edu>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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@ -26,68 +26,48 @@
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.type _start,#function
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_start:
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/* First order of business is to load %g4 with our base address. */
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sethi %uhi(_start), %g4
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or %g4, %ulo(_start), %g4
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sllx %g4, 32, %g4
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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*8, %sp
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/* Save %g1. When starting a binary via the dynamic linker, %g1
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contains the address of the shared library termination function,
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which we will register below with atexit() to be called by exit().
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If we are statically linked, this will be NULL. */
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/* Do essential libc initialization (sp points to argc, argv, and envp) */
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call __libc_init_first
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mov %g1, %l0
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/* Now that we have the proper stack frame, register library termination
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function, if there is any: */
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brz,pn %l0, 1f
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nop
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call atexit
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mov %l0, %o0
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1:
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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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plus the bias we added, plus the magic v9 STACK_BIAS. */
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ldx [%sp+STACK_BIAS+22*8], %o0
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add %sp, STACK_BIAS+23*8, %o1
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sllx %o0, 3, %o2
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add %o2, %o1, %o2
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sethi %hi(__environ), %g2
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add %o2, 8, %o2
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add %g2, %g4, %g2
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stx %o2, [%g2+%lo(__environ)]
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ldx [%sp+STACK_BIAS+22*8], %o1
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add %sp, STACK_BIAS+23*8, %o2
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mov %o0, %l0 /* tuck them away */
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mov %o1, %l1
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/* Load the addresses of the user entry points. */
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sethi %uhi(main), %o0
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sethi %uhi(_init), %o3
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sethi %uhi(_fini), %o4
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or %o0, %ulo(main), %o0
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or %o3, %ulo(_init), %o3
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or %o4, %ulo(_fini), %o4
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sethi %hi(main), %i0
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sethi %hi(_init), %i3
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sethi %hi(_fini), %i4
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sllx %o0, 32, %o0
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or %i0, %lo(main), %i0
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sllx %o3, 32, %o3
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or %i3, %lo(_init), %i3
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sllx %o4, 32, %o4
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or %i4, %lo(_fini), %i4
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or %o0, %i0, %o0
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or %o3, %i3, %o3
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or %o4, %i4, %o4
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/* Call _init, the entry point to our own .init section. */
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call _init
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mov %o2, %l2
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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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/* Register our .fini section with atexit. */
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sethi %hi(_fini), %o0
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add %o0, %g4, %o0
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call atexit
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add %o0, %lo(_fini), %o0
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/* Call the user's main and exit with its return value. */
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mov %l0, %o0
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mov %l1, %o1
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call main
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mov %l2, %o2
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call exit
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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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illtrap 0
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.size _start,.-_start
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.size _start, .-_start
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