diff options
Diffstat (limited to 'js/src/ctypes/libffi/src/powerpc/sysv.S')
| -rw-r--r-- | js/src/ctypes/libffi/src/powerpc/sysv.S | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/js/src/ctypes/libffi/src/powerpc/sysv.S b/js/src/ctypes/libffi/src/powerpc/sysv.S new file mode 100644 index 0000000000..1474ce702b --- /dev/null +++ b/js/src/ctypes/libffi/src/powerpc/sysv.S @@ -0,0 +1,175 @@ +/* ----------------------------------------------------------------------- + sysv.S - Copyright (c) 1998 Geoffrey Keating + Copyright (C) 2007 Free Software Foundation, Inc + + PowerPC Assembly glue. + + Permission is hereby granted, free of charge, to any person obtaining + a copy of this software and associated documentation files (the + ``Software''), to deal in the Software without restriction, including + without limitation the rights to use, copy, modify, merge, publish, + distribute, sublicense, and/or sell copies of the Software, and to + permit persons to whom the Software is furnished to do so, subject to + the following conditions: + + The above copyright notice and this permission notice shall be included + in all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, + EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT + HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + DEALINGS IN THE SOFTWARE. + ----------------------------------------------------------------------- */ + +#define LIBFFI_ASM +#include <fficonfig.h> +#include <ffi.h> +#include <powerpc/asm.h> + +#ifndef POWERPC64 +FFI_HIDDEN(ffi_call_SYSV) +ENTRY(ffi_call_SYSV) + .cfi_startproc + /* Save the old stack pointer as AP. */ + mr %r10,%r1 + .cfi_def_cfa_register 10 + + /* Allocate the stack space we need. */ + stwux %r1,%r1,%r8 + /* Save registers we use. */ + mflr %r9 + stw %r28,-16(%r10) + stw %r29,-12(%r10) + stw %r30, -8(%r10) + stw %r31, -4(%r10) + stw %r9, 4(%r10) + .cfi_offset 65, 4 + .cfi_offset 31, -4 + .cfi_offset 30, -8 + .cfi_offset 29, -12 + .cfi_offset 28, -16 + + /* Save arguments over call... */ + stw %r7, -20(%r10) /* closure, */ + mr %r31,%r6 /* flags, */ + mr %r30,%r5 /* rvalue, */ + mr %r29,%r4 /* function address, */ + mr %r28,%r10 /* our AP. */ + .cfi_def_cfa_register 28 + + /* Call ffi_prep_args_SYSV. */ + mr %r4,%r1 + bl ffi_prep_args_SYSV@local + + /* Now do the call. */ + /* Set up cr1 with bits 4-7 of the flags. */ + mtcrf 0x40,%r31 + /* Get the address to call into CTR. */ + mtctr %r29 + /* Load all those argument registers. */ + lwz %r3,-24-(8*4)(%r28) + lwz %r4,-24-(7*4)(%r28) + lwz %r5,-24-(6*4)(%r28) + lwz %r6,-24-(5*4)(%r28) + bf- 5,1f + nop + lwz %r7,-24-(4*4)(%r28) + lwz %r8,-24-(3*4)(%r28) + lwz %r9,-24-(2*4)(%r28) + lwz %r10,-24-(1*4)(%r28) + nop +1: + +#ifndef __NO_FPRS__ + /* Load all the FP registers. */ + bf- 6,2f + lfd %f1,-24-(8*4)-(8*8)(%r28) + lfd %f2,-24-(8*4)-(7*8)(%r28) + lfd %f3,-24-(8*4)-(6*8)(%r28) + lfd %f4,-24-(8*4)-(5*8)(%r28) + nop + lfd %f5,-24-(8*4)-(4*8)(%r28) + lfd %f6,-24-(8*4)-(3*8)(%r28) + lfd %f7,-24-(8*4)-(2*8)(%r28) + lfd %f8,-24-(8*4)-(1*8)(%r28) +#endif +2: + + /* Make the call. */ + lwz %r11, -20(%r28) + bctrl + + /* Now, deal with the return value. */ + mtcrf 0x01,%r31 /* cr7 */ + bt- 31,L(small_struct_return_value) + bt- 30,L(done_return_value) +#ifndef __NO_FPRS__ + bt- 29,L(fp_return_value) +#endif + stw %r3,0(%r30) + bf+ 28,L(done_return_value) + stw %r4,4(%r30) + mtcrf 0x02,%r31 /* cr6 */ + bf 27,L(done_return_value) + stw %r5,8(%r30) + stw %r6,12(%r30) + /* Fall through... */ + +L(done_return_value): + /* Restore the registers we used and return. */ + lwz %r9, 4(%r28) + lwz %r31, -4(%r28) + mtlr %r9 + lwz %r30, -8(%r28) + lwz %r29,-12(%r28) + lwz %r28,-16(%r28) + .cfi_remember_state + /* At this point we don't have a cfa register. Say all our + saved regs have been restored. */ + .cfi_same_value 65 + .cfi_same_value 31 + .cfi_same_value 30 + .cfi_same_value 29 + .cfi_same_value 28 + /* Hopefully this works.. */ + .cfi_def_cfa_register 1 + .cfi_offset 1, 0 + lwz %r1,0(%r1) + .cfi_same_value 1 + blr + +#ifndef __NO_FPRS__ +L(fp_return_value): + .cfi_restore_state + bf 28,L(float_return_value) + stfd %f1,0(%r30) + mtcrf 0x02,%r31 /* cr6 */ + bf 27,L(done_return_value) + stfd %f2,8(%r30) + b L(done_return_value) +L(float_return_value): + stfs %f1,0(%r30) + b L(done_return_value) +#endif + +L(small_struct_return_value): + /* + * The C code always allocates a properly-aligned 8-byte bounce + * buffer to make this assembly code very simple. Just write out + * r3 and r4 to the buffer to allow the C code to handle the rest. + */ + stw %r3, 0(%r30) + stw %r4, 4(%r30) + b L(done_return_value) + .cfi_endproc + +END(ffi_call_SYSV) + +#if defined __ELF__ && defined __linux__ + .section .note.GNU-stack,"",@progbits +#endif +#endif |