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jeremybenn |
/* -----------------------------------------------------------------------
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darwin64.S - Copyright (c) 2006 Free Software Foundation, Inc.
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Copyright (c) 2008 Red Hat, Inc.
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derived from unix64.S
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x86-64 Foreign Function Interface for Darwin.
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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, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR
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OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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----------------------------------------------------------------------- */
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#ifdef __x86_64__
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#define LIBFFI_ASM
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#include
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#include
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.file "darwin64.S"
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.text
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/* ffi_call_unix64 (void *args, unsigned long bytes, unsigned flags,
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void *raddr, void (*fnaddr)(void));
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Bit o trickiness here -- ARGS+BYTES is the base of the stack frame
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for this function. This has been allocated by ffi_call. We also
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deallocate some of the stack that has been alloca'd. */
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.align 3
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.globl _ffi_call_unix64
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_ffi_call_unix64:
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LUW0:
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movq (%rsp), %r10 /* Load return address. */
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leaq (%rdi, %rsi), %rax /* Find local stack base. */
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movq %rdx, (%rax) /* Save flags. */
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movq %rcx, 8(%rax) /* Save raddr. */
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movq %rbp, 16(%rax) /* Save old frame pointer. */
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movq %r10, 24(%rax) /* Relocate return address. */
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movq %rax, %rbp /* Finalize local stack frame. */
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LUW1:
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movq %rdi, %r10 /* Save a copy of the register area. */
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movq %r8, %r11 /* Save a copy of the target fn. */
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movl %r9d, %eax /* Set number of SSE registers. */
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/* Load up all argument registers. */
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movq (%r10), %rdi
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movq 8(%r10), %rsi
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movq 16(%r10), %rdx
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movq 24(%r10), %rcx
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movq 32(%r10), %r8
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movq 40(%r10), %r9
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testl %eax, %eax
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jnz Lload_sse
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Lret_from_load_sse:
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/* Deallocate the reg arg area. */
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leaq 176(%r10), %rsp
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/* Call the user function. */
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call *%r11
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/* Deallocate stack arg area; local stack frame in redzone. */
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leaq 24(%rbp), %rsp
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movq 0(%rbp), %rcx /* Reload flags. */
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movq 8(%rbp), %rdi /* Reload raddr. */
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movq 16(%rbp), %rbp /* Reload old frame pointer. */
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LUW2:
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/* The first byte of the flags contains the FFI_TYPE. */
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movzbl %cl, %r10d
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leaq Lstore_table(%rip), %r11
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movslq (%r11, %r10, 4), %r10
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addq %r11, %r10
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jmp *%r10
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Lstore_table:
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.long Lst_void-Lstore_table /* FFI_TYPE_VOID */
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.long Lst_sint32-Lstore_table /* FFI_TYPE_INT */
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.long Lst_float-Lstore_table /* FFI_TYPE_FLOAT */
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.long Lst_double-Lstore_table /* FFI_TYPE_DOUBLE */
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.long Lst_ldouble-Lstore_table /* FFI_TYPE_LONGDOUBLE */
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.long Lst_uint8-Lstore_table /* FFI_TYPE_UINT8 */
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.long Lst_sint8-Lstore_table /* FFI_TYPE_SINT8 */
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.long Lst_uint16-Lstore_table /* FFI_TYPE_UINT16 */
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.long Lst_sint16-Lstore_table /* FFI_TYPE_SINT16 */
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.long Lst_uint32-Lstore_table /* FFI_TYPE_UINT32 */
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.long Lst_sint32-Lstore_table /* FFI_TYPE_SINT32 */
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.long Lst_int64-Lstore_table /* FFI_TYPE_UINT64 */
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.long Lst_int64-Lstore_table /* FFI_TYPE_SINT64 */
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.long Lst_struct-Lstore_table /* FFI_TYPE_STRUCT */
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.long Lst_int64-Lstore_table /* FFI_TYPE_POINTER */
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.text
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.align 3
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Lst_void:
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ret
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.align 3
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Lst_uint8:
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movzbq %al, %rax
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movq %rax, (%rdi)
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ret
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.align 3
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Lst_sint8:
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movsbq %al, %rax
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movq %rax, (%rdi)
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ret
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.align 3
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Lst_uint16:
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movzwq %ax, %rax
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movq %rax, (%rdi)
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.align 3
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Lst_sint16:
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movswq %ax, %rax
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movq %rax, (%rdi)
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ret
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.align 3
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Lst_uint32:
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movl %eax, %eax
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movq %rax, (%rdi)
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.align 3
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Lst_sint32:
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cltq
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movq %rax, (%rdi)
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ret
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.align 3
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Lst_int64:
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movq %rax, (%rdi)
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ret
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.align 3
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Lst_float:
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movss %xmm0, (%rdi)
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ret
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.align 3
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Lst_double:
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movsd %xmm0, (%rdi)
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ret
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Lst_ldouble:
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fstpt (%rdi)
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ret
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.align 3
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Lst_struct:
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leaq -20(%rsp), %rsi /* Scratch area in redzone. */
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/* We have to locate the values now, and since we don't want to
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write too much data into the user's return value, we spill the
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value to a 16 byte scratch area first. Bits 8, 9, and 10
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control where the values are located. Only one of the three
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bits will be set; see ffi_prep_cif_machdep for the pattern. */
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movd %xmm0, %r10
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movd %xmm1, %r11
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testl $0x100, %ecx
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cmovnz %rax, %rdx
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cmovnz %r10, %rax
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testl $0x200, %ecx
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cmovnz %r10, %rdx
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testl $0x400, %ecx
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cmovnz %r10, %rax
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cmovnz %r11, %rdx
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movq %rax, (%rsi)
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movq %rdx, 8(%rsi)
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/* Bits 12-31 contain the true size of the structure. Copy from
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the scratch area to the true destination. */
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shrl $12, %ecx
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rep movsb
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ret
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/* Many times we can avoid loading any SSE registers at all.
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It's not worth an indirect jump to load the exact set of
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SSE registers needed; zero or all is a good compromise. */
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.align 3
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LUW3:
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Lload_sse:
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movdqa 48(%r10), %xmm0
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movdqa 64(%r10), %xmm1
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movdqa 80(%r10), %xmm2
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movdqa 96(%r10), %xmm3
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movdqa 112(%r10), %xmm4
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movdqa 128(%r10), %xmm5
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movdqa 144(%r10), %xmm6
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movdqa 160(%r10), %xmm7
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jmp Lret_from_load_sse
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LUW4:
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.align 3
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.globl _ffi_closure_unix64
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_ffi_closure_unix64:
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LUW5:
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/* The carry flag is set by the trampoline iff SSE registers
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are used. Don't clobber it before the branch instruction. */
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leaq -200(%rsp), %rsp
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LUW6:
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movq %rdi, (%rsp)
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movq %rsi, 8(%rsp)
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movq %rdx, 16(%rsp)
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movq %rcx, 24(%rsp)
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movq %r8, 32(%rsp)
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movq %r9, 40(%rsp)
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jc Lsave_sse
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Lret_from_save_sse:
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movq %r10, %rdi
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leaq 176(%rsp), %rsi
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movq %rsp, %rdx
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leaq 208(%rsp), %rcx
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call _ffi_closure_unix64_inner
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| 225 |
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/* Deallocate stack frame early; return value is now in redzone. */
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addq $200, %rsp
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LUW7:
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| 228 |
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| 229 |
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/* The first byte of the return value contains the FFI_TYPE. */
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| 230 |
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movzbl %al, %r10d
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leaq Lload_table(%rip), %r11
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| 232 |
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movslq (%r11, %r10, 4), %r10
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| 233 |
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addq %r11, %r10
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| 234 |
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jmp *%r10
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| 235 |
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| 236 |
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Lload_table:
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| 237 |
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.long Lld_void-Lload_table /* FFI_TYPE_VOID */
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| 238 |
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.long Lld_int32-Lload_table /* FFI_TYPE_INT */
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| 239 |
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.long Lld_float-Lload_table /* FFI_TYPE_FLOAT */
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| 240 |
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.long Lld_double-Lload_table /* FFI_TYPE_DOUBLE */
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| 241 |
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.long Lld_ldouble-Lload_table /* FFI_TYPE_LONGDOUBLE */
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| 242 |
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.long Lld_int8-Lload_table /* FFI_TYPE_UINT8 */
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| 243 |
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.long Lld_int8-Lload_table /* FFI_TYPE_SINT8 */
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| 244 |
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.long Lld_int16-Lload_table /* FFI_TYPE_UINT16 */
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| 245 |
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.long Lld_int16-Lload_table /* FFI_TYPE_SINT16 */
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| 246 |
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.long Lld_int32-Lload_table /* FFI_TYPE_UINT32 */
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| 247 |
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.long Lld_int32-Lload_table /* FFI_TYPE_SINT32 */
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| 248 |
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.long Lld_int64-Lload_table /* FFI_TYPE_UINT64 */
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| 249 |
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.long Lld_int64-Lload_table /* FFI_TYPE_SINT64 */
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| 250 |
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.long Lld_struct-Lload_table /* FFI_TYPE_STRUCT */
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| 251 |
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.long Lld_int64-Lload_table /* FFI_TYPE_POINTER */
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| 252 |
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| 253 |
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.text
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| 254 |
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.align 3
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| 255 |
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Lld_void:
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| 256 |
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ret
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| 257 |
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.align 3
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| 258 |
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Lld_int8:
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| 259 |
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movzbl -24(%rsp), %eax
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| 260 |
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ret
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| 261 |
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.align 3
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| 262 |
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Lld_int16:
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| 263 |
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movzwl -24(%rsp), %eax
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| 264 |
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ret
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| 265 |
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.align 3
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| 266 |
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Lld_int32:
|
| 267 |
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movl -24(%rsp), %eax
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| 268 |
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ret
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| 269 |
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.align 3
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| 270 |
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Lld_int64:
|
| 271 |
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movq -24(%rsp), %rax
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| 272 |
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ret
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| 273 |
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.align 3
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| 274 |
|
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Lld_float:
|
| 275 |
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movss -24(%rsp), %xmm0
|
| 276 |
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ret
|
| 277 |
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.align 3
|
| 278 |
|
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Lld_double:
|
| 279 |
|
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movsd -24(%rsp), %xmm0
|
| 280 |
|
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ret
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| 281 |
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.align 3
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| 282 |
|
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Lld_ldouble:
|
| 283 |
|
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fldt -24(%rsp)
|
| 284 |
|
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ret
|
| 285 |
|
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.align 3
|
| 286 |
|
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Lld_struct:
|
| 287 |
|
|
/* There are four possibilities here, %rax/%rdx, %xmm0/%rax,
|
| 288 |
|
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%rax/%xmm0, %xmm0/%xmm1. We collapse two by always loading
|
| 289 |
|
|
both rdx and xmm1 with the second word. For the remaining,
|
| 290 |
|
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bit 8 set means xmm0 gets the second word, and bit 9 means
|
| 291 |
|
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that rax gets the second word. */
|
| 292 |
|
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movq -24(%rsp), %rcx
|
| 293 |
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movq -16(%rsp), %rdx
|
| 294 |
|
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movq -16(%rsp), %xmm1
|
| 295 |
|
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testl $0x100, %eax
|
| 296 |
|
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cmovnz %rdx, %rcx
|
| 297 |
|
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movd %rcx, %xmm0
|
| 298 |
|
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testl $0x200, %eax
|
| 299 |
|
|
movq -24(%rsp), %rax
|
| 300 |
|
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cmovnz %rdx, %rax
|
| 301 |
|
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ret
|
| 302 |
|
|
|
| 303 |
|
|
/* See the comment above Lload_sse; the same logic applies here. */
|
| 304 |
|
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.align 3
|
| 305 |
|
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LUW8:
|
| 306 |
|
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Lsave_sse:
|
| 307 |
|
|
movdqa %xmm0, 48(%rsp)
|
| 308 |
|
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movdqa %xmm1, 64(%rsp)
|
| 309 |
|
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movdqa %xmm2, 80(%rsp)
|
| 310 |
|
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movdqa %xmm3, 96(%rsp)
|
| 311 |
|
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movdqa %xmm4, 112(%rsp)
|
| 312 |
|
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movdqa %xmm5, 128(%rsp)
|
| 313 |
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movdqa %xmm6, 144(%rsp)
|
| 314 |
|
|
movdqa %xmm7, 160(%rsp)
|
| 315 |
|
|
jmp Lret_from_save_sse
|
| 316 |
|
|
|
| 317 |
|
|
LUW9:
|
| 318 |
|
|
.section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support
|
| 319 |
|
|
EH_frame1:
|
| 320 |
|
|
.set L$set$0,LECIE1-LSCIE1 /* CIE Length */
|
| 321 |
|
|
.long L$set$0
|
| 322 |
|
|
LSCIE1:
|
| 323 |
|
|
.long 0x0 /* CIE Identifier Tag */
|
| 324 |
|
|
.byte 0x1 /* CIE Version */
|
| 325 |
|
|
.ascii "zR\0" /* CIE Augmentation */
|
| 326 |
|
|
.byte 0x1 /* uleb128 0x1; CIE Code Alignment Factor */
|
| 327 |
|
|
.byte 0x78 /* sleb128 -8; CIE Data Alignment Factor */
|
| 328 |
|
|
.byte 0x10 /* CIE RA Column */
|
| 329 |
|
|
.byte 0x1 /* uleb128 0x1; Augmentation size */
|
| 330 |
|
|
.byte 0x10 /* FDE Encoding (pcrel sdata4) */
|
| 331 |
|
|
.byte 0xc /* DW_CFA_def_cfa, %rsp offset 8 */
|
| 332 |
|
|
.byte 0x7 /* uleb128 0x7 */
|
| 333 |
|
|
.byte 0x8 /* uleb128 0x8 */
|
| 334 |
|
|
.byte 0x90 /* DW_CFA_offset, column 0x10 */
|
| 335 |
|
|
.byte 0x1
|
| 336 |
|
|
.align 3
|
| 337 |
|
|
LECIE1:
|
| 338 |
|
|
.globl _ffi_call_unix64.eh
|
| 339 |
|
|
_ffi_call_unix64.eh:
|
| 340 |
|
|
LSFDE1:
|
| 341 |
|
|
.set L$set$1,LEFDE1-LASFDE1 /* FDE Length */
|
| 342 |
|
|
.long L$set$1
|
| 343 |
|
|
LASFDE1:
|
| 344 |
|
|
.long LASFDE1-EH_frame1 /* FDE CIE offset */
|
| 345 |
|
|
.quad LUW0-. /* FDE initial location */
|
| 346 |
|
|
.set L$set$2,LUW4-LUW0 /* FDE address range */
|
| 347 |
|
|
.quad L$set$2
|
| 348 |
|
|
.byte 0x0 /* Augmentation size */
|
| 349 |
|
|
.byte 0x4 /* DW_CFA_advance_loc4 */
|
| 350 |
|
|
.set L$set$3,LUW1-LUW0
|
| 351 |
|
|
.long L$set$3
|
| 352 |
|
|
|
| 353 |
|
|
/* New stack frame based off rbp. This is a itty bit of unwind
|
| 354 |
|
|
trickery in that the CFA *has* changed. There is no easy way
|
| 355 |
|
|
to describe it correctly on entry to the function. Fortunately,
|
| 356 |
|
|
it doesn't matter too much since at all points we can correctly
|
| 357 |
|
|
unwind back to ffi_call. Note that the location to which we
|
| 358 |
|
|
moved the return address is (the new) CFA-8, so from the
|
| 359 |
|
|
perspective of the unwind info, it hasn't moved. */
|
| 360 |
|
|
.byte 0xc /* DW_CFA_def_cfa, %rbp offset 32 */
|
| 361 |
|
|
.byte 0x6
|
| 362 |
|
|
.byte 0x20
|
| 363 |
|
|
.byte 0x80+6 /* DW_CFA_offset, %rbp offset 2*-8 */
|
| 364 |
|
|
.byte 0x2
|
| 365 |
|
|
.byte 0xa /* DW_CFA_remember_state */
|
| 366 |
|
|
|
| 367 |
|
|
.byte 0x4 /* DW_CFA_advance_loc4 */
|
| 368 |
|
|
.set L$set$4,LUW2-LUW1
|
| 369 |
|
|
.long L$set$4
|
| 370 |
|
|
.byte 0xc /* DW_CFA_def_cfa, %rsp offset 8 */
|
| 371 |
|
|
.byte 0x7
|
| 372 |
|
|
.byte 0x8
|
| 373 |
|
|
.byte 0xc0+6 /* DW_CFA_restore, %rbp */
|
| 374 |
|
|
|
| 375 |
|
|
.byte 0x4 /* DW_CFA_advance_loc4 */
|
| 376 |
|
|
.set L$set$5,LUW3-LUW2
|
| 377 |
|
|
.long L$set$5
|
| 378 |
|
|
.byte 0xb /* DW_CFA_restore_state */
|
| 379 |
|
|
|
| 380 |
|
|
.align 3
|
| 381 |
|
|
LEFDE1:
|
| 382 |
|
|
.globl _ffi_closure_unix64.eh
|
| 383 |
|
|
_ffi_closure_unix64.eh:
|
| 384 |
|
|
LSFDE3:
|
| 385 |
|
|
.set L$set$6,LEFDE3-LASFDE3 /* FDE Length */
|
| 386 |
|
|
.long L$set$6
|
| 387 |
|
|
LASFDE3:
|
| 388 |
|
|
.long LASFDE3-EH_frame1 /* FDE CIE offset */
|
| 389 |
|
|
.quad LUW5-. /* FDE initial location */
|
| 390 |
|
|
.set L$set$7,LUW9-LUW5 /* FDE address range */
|
| 391 |
|
|
.quad L$set$7
|
| 392 |
|
|
.byte 0x0 /* Augmentation size */
|
| 393 |
|
|
|
| 394 |
|
|
.byte 0x4 /* DW_CFA_advance_loc4 */
|
| 395 |
|
|
.set L$set$8,LUW6-LUW5
|
| 396 |
|
|
.long L$set$8
|
| 397 |
|
|
.byte 0xe /* DW_CFA_def_cfa_offset */
|
| 398 |
|
|
.byte 208,1 /* uleb128 208 */
|
| 399 |
|
|
.byte 0xa /* DW_CFA_remember_state */
|
| 400 |
|
|
|
| 401 |
|
|
.byte 0x4 /* DW_CFA_advance_loc4 */
|
| 402 |
|
|
.set L$set$9,LUW7-LUW6
|
| 403 |
|
|
.long L$set$9
|
| 404 |
|
|
.byte 0xe /* DW_CFA_def_cfa_offset */
|
| 405 |
|
|
.byte 0x8
|
| 406 |
|
|
|
| 407 |
|
|
.byte 0x4 /* DW_CFA_advance_loc4 */
|
| 408 |
|
|
.set L$set$10,LUW8-LUW7
|
| 409 |
|
|
.long L$set$10
|
| 410 |
|
|
.byte 0xb /* DW_CFA_restore_state */
|
| 411 |
|
|
|
| 412 |
|
|
.align 3
|
| 413 |
|
|
LEFDE3:
|
| 414 |
|
|
.subsections_via_symbols
|
| 415 |
|
|
|
| 416 |
|
|
#endif /* __x86_64__ */
|
