vasilito
ff4ff35918
Red Bear OS is a full fork. All sources must be available from git clone with zero network access. Removed gitignore rules that excluded fetched source trees under recipes/*/source/, local/recipes/kde/*/source/, local/recipes/qt/*/source/, and vendor source trees. Build artifacts (target/, build/, source.tar, *.o, *.so) remain excluded. 127291 files added — kernel, relibc, base, bootloader, pkgar, all KDE/Qt frameworks, mesa, wayland, DRM drivers, and every other recipe source.
174 lines
4.4 KiB
ArmAsm
174 lines
4.4 KiB
ArmAsm
/* -----------------------------------------------------------------------
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sysv.S - Copyright (c) 1998 Geoffrey Keating
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Copyright (C) 2007 Free Software Foundation, Inc
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PowerPC Assembly glue.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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``Software''), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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----------------------------------------------------------------------- */
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#define LIBFFI_ASM
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#include <fficonfig.h>
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#include <ffi.h>
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#include <powerpc/asm.h>
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#ifndef POWERPC64
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FFI_HIDDEN(ffi_call_SYSV)
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ENTRY(ffi_call_SYSV)
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.cfi_startproc
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/* Save the old stack pointer as AP. */
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mr %r10,%r1
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.cfi_def_cfa_register 10
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/* Allocate the stack space we need. */
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stwux %r1,%r1,%r8
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/* Save registers we use. */
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mflr %r9
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stw %r28,-16(%r10)
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stw %r29,-12(%r10)
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stw %r30, -8(%r10)
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stw %r31, -4(%r10)
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stw %r9, 4(%r10)
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.cfi_offset 65, 4
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.cfi_offset 31, -4
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.cfi_offset 30, -8
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.cfi_offset 29, -12
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.cfi_offset 28, -16
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/* Save arguments over call... */
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stw %r7, -20(%r10) /* closure, */
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mr %r31,%r6 /* flags, */
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mr %r30,%r5 /* rvalue, */
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mr %r29,%r4 /* function address, */
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mr %r28,%r10 /* our AP. */
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.cfi_def_cfa_register 28
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/* Call ffi_prep_args_SYSV. */
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mr %r4,%r1
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bl ffi_prep_args_SYSV@local
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/* Now do the call. */
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/* Set up cr1 with bits 4-7 of the flags. */
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mtcrf 0x40,%r31
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/* Get the address to call into CTR. */
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mtctr %r29
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/* Load all those argument registers. */
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lwz %r3,-24-(8*4)(%r28)
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lwz %r4,-24-(7*4)(%r28)
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lwz %r5,-24-(6*4)(%r28)
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lwz %r6,-24-(5*4)(%r28)
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bf- 5,1f
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nop
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lwz %r7,-24-(4*4)(%r28)
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lwz %r8,-24-(3*4)(%r28)
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lwz %r9,-24-(2*4)(%r28)
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lwz %r10,-24-(1*4)(%r28)
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nop
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1:
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#ifndef __NO_FPRS__
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/* Load all the FP registers. */
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bf- 6,2f
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lfd %f1,-24-(8*4)-(8*8)(%r28)
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lfd %f2,-24-(8*4)-(7*8)(%r28)
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lfd %f3,-24-(8*4)-(6*8)(%r28)
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lfd %f4,-24-(8*4)-(5*8)(%r28)
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nop
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lfd %f5,-24-(8*4)-(4*8)(%r28)
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lfd %f6,-24-(8*4)-(3*8)(%r28)
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lfd %f7,-24-(8*4)-(2*8)(%r28)
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lfd %f8,-24-(8*4)-(1*8)(%r28)
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#endif
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2:
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/* Make the call. */
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lwz %r11, -20(%r28)
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bctrl
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/* Now, deal with the return value. */
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mtcrf 0x03,%r31 /* cr6-cr7 */
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bt- 31,L(small_struct_return_value)
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bt- 30,L(done_return_value)
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#ifndef __NO_FPRS__
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bt- 29,L(fp_return_value)
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#endif
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stw %r3,0(%r30)
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bf+ 27,L(done_return_value)
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stw %r4,4(%r30)
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bf 26,L(done_return_value)
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stw %r5,8(%r30)
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stw %r6,12(%r30)
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/* Fall through... */
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L(done_return_value):
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/* Restore the registers we used and return. */
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lwz %r9, 4(%r28)
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lwz %r31, -4(%r28)
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mtlr %r9
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lwz %r30, -8(%r28)
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lwz %r29,-12(%r28)
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lwz %r28,-16(%r28)
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.cfi_remember_state
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/* At this point we don't have a cfa register. Say all our
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saved regs have been restored. */
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.cfi_same_value 65
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.cfi_same_value 31
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.cfi_same_value 30
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.cfi_same_value 29
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.cfi_same_value 28
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/* Hopefully this works.. */
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.cfi_def_cfa_register 1
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.cfi_offset 1, 0
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lwz %r1,0(%r1)
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.cfi_same_value 1
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blr
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#ifndef __NO_FPRS__
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L(fp_return_value):
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.cfi_restore_state
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bf 27,L(float_return_value)
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stfd %f1,0(%r30)
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bf 26,L(done_return_value)
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stfd %f2,8(%r30)
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b L(done_return_value)
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L(float_return_value):
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stfs %f1,0(%r30)
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b L(done_return_value)
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#endif
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L(small_struct_return_value):
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/*
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* The C code always allocates a properly-aligned 8-byte bounce
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* buffer to make this assembly code very simple. Just write out
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* r3 and r4 to the buffer to allow the C code to handle the rest.
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*/
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stw %r3, 0(%r30)
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stw %r4, 4(%r30)
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b L(done_return_value)
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.cfi_endproc
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END(ffi_call_SYSV)
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#if defined __ELF__ && defined __linux__
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.section .note.GNU-stack,"",@progbits
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#endif
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#endif
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