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Diffstat (limited to 'Modules/_ctypes/libffi/src/aarch64/sysv.S')
| -rw-r--r-- | Modules/_ctypes/libffi/src/aarch64/sysv.S | 333 |
1 files changed, 0 insertions, 333 deletions
diff --git a/Modules/_ctypes/libffi/src/aarch64/sysv.S b/Modules/_ctypes/libffi/src/aarch64/sysv.S deleted file mode 100644 index 169eab804e..0000000000 --- a/Modules/_ctypes/libffi/src/aarch64/sysv.S +++ /dev/null @@ -1,333 +0,0 @@ -/* Copyright (c) 2009, 2010, 2011, 2012 ARM Ltd. - -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> - -#ifdef HAVE_MACHINE_ASM_H -#include <machine/asm.h> -#else -#ifdef __USER_LABEL_PREFIX__ -#define CONCAT1(a, b) CONCAT2(a, b) -#define CONCAT2(a, b) a ## b - -/* Use the right prefix for global labels. */ -#define CNAME(x) CONCAT1 (__USER_LABEL_PREFIX__, x) -#else -#define CNAME(x) x -#endif -#endif - -#define cfi_adjust_cfa_offset(off) .cfi_adjust_cfa_offset off -#define cfi_rel_offset(reg, off) .cfi_rel_offset reg, off -#define cfi_restore(reg) .cfi_restore reg -#define cfi_def_cfa_register(reg) .cfi_def_cfa_register reg - - .text - .globl CNAME(ffi_call_SYSV) -#ifdef __ELF__ - .type CNAME(ffi_call_SYSV), #function -#endif -#ifdef __APPLE__ - .align 2 -#endif - -/* ffi_call_SYSV() - - Create a stack frame, setup an argument context, call the callee - and extract the result. - - The maximum required argument stack size is provided, - ffi_call_SYSV() allocates that stack space then calls the - prepare_fn to populate register context and stack. The - argument passing registers are loaded from the register - context and the callee called, on return the register passing - register are saved back to the context. Our caller will - extract the return value from the final state of the saved - register context. - - Prototype: - - extern unsigned - ffi_call_SYSV (void (*)(struct call_context *context, unsigned char *, - extended_cif *), - struct call_context *context, - extended_cif *, - size_t required_stack_size, - void (*fn)(void)); - - Therefore on entry we have: - - x0 prepare_fn - x1 &context - x2 &ecif - x3 bytes - x4 fn - - This function uses the following stack frame layout: - - == - saved x30(lr) - x29(fp)-> saved x29(fp) - saved x24 - saved x23 - saved x22 - sp' -> saved x21 - ... - sp -> (constructed callee stack arguments) - == - - Voila! */ - -#define ffi_call_SYSV_FS (8 * 4) - - .cfi_startproc -CNAME(ffi_call_SYSV): - stp x29, x30, [sp, #-16]! - cfi_adjust_cfa_offset (16) - cfi_rel_offset (x29, 0) - cfi_rel_offset (x30, 8) - - mov x29, sp - cfi_def_cfa_register (x29) - sub sp, sp, #ffi_call_SYSV_FS - - stp x21, x22, [sp, #0] - cfi_rel_offset (x21, 0 - ffi_call_SYSV_FS) - cfi_rel_offset (x22, 8 - ffi_call_SYSV_FS) - - stp x23, x24, [sp, #16] - cfi_rel_offset (x23, 16 - ffi_call_SYSV_FS) - cfi_rel_offset (x24, 24 - ffi_call_SYSV_FS) - - mov x21, x1 - mov x22, x2 - mov x24, x4 - - /* Allocate the stack space for the actual arguments, many - arguments will be passed in registers, but we assume - worst case and allocate sufficient stack for ALL of - the arguments. */ - sub sp, sp, x3 - - /* unsigned (*prepare_fn) (struct call_context *context, - unsigned char *stack, extended_cif *ecif); - */ - mov x23, x0 - mov x0, x1 - mov x1, sp - /* x2 already in place */ - blr x23 - - /* Preserve the flags returned. */ - mov x23, x0 - - /* Figure out if we should touch the vector registers. */ - tbz x23, #AARCH64_FFI_WITH_V_BIT, 1f - - /* Load the vector argument passing registers. */ - ldp q0, q1, [x21, #8*32 + 0] - ldp q2, q3, [x21, #8*32 + 32] - ldp q4, q5, [x21, #8*32 + 64] - ldp q6, q7, [x21, #8*32 + 96] -1: - /* Load the core argument passing registers. */ - ldp x0, x1, [x21, #0] - ldp x2, x3, [x21, #16] - ldp x4, x5, [x21, #32] - ldp x6, x7, [x21, #48] - - /* Don't forget x8 which may be holding the address of a return buffer. - */ - ldr x8, [x21, #8*8] - - blr x24 - - /* Save the core argument passing registers. */ - stp x0, x1, [x21, #0] - stp x2, x3, [x21, #16] - stp x4, x5, [x21, #32] - stp x6, x7, [x21, #48] - - /* Note nothing useful ever comes back in x8! */ - - /* Figure out if we should touch the vector registers. */ - tbz x23, #AARCH64_FFI_WITH_V_BIT, 1f - - /* Save the vector argument passing registers. */ - stp q0, q1, [x21, #8*32 + 0] - stp q2, q3, [x21, #8*32 + 32] - stp q4, q5, [x21, #8*32 + 64] - stp q6, q7, [x21, #8*32 + 96] -1: - /* All done, unwind our stack frame. */ - ldp x21, x22, [x29, # - ffi_call_SYSV_FS] - cfi_restore (x21) - cfi_restore (x22) - - ldp x23, x24, [x29, # - ffi_call_SYSV_FS + 16] - cfi_restore (x23) - cfi_restore (x24) - - mov sp, x29 - cfi_def_cfa_register (sp) - - ldp x29, x30, [sp], #16 - cfi_adjust_cfa_offset (-16) - cfi_restore (x29) - cfi_restore (x30) - - ret - - .cfi_endproc -#ifdef __ELF__ - .size CNAME(ffi_call_SYSV), .-CNAME(ffi_call_SYSV) -#endif - -#define ffi_closure_SYSV_FS (8 * 2 + AARCH64_CALL_CONTEXT_SIZE) - -/* ffi_closure_SYSV - - Closure invocation glue. This is the low level code invoked directly by - the closure trampoline to setup and call a closure. - - On entry x17 points to a struct trampoline_data, x16 has been clobbered - all other registers are preserved. - - We allocate a call context and save the argument passing registers, - then invoked the generic C ffi_closure_SYSV_inner() function to do all - the real work, on return we load the result passing registers back from - the call context. - - On entry - - extern void - ffi_closure_SYSV (struct trampoline_data *); - - struct trampoline_data - { - UINT64 *ffi_closure; - UINT64 flags; - }; - - This function uses the following stack frame layout: - - == - saved x30(lr) - x29(fp)-> saved x29(fp) - saved x22 - saved x21 - ... - sp -> call_context - == - - Voila! */ - - .text - .globl CNAME(ffi_closure_SYSV) -#ifdef __APPLE__ - .align 2 -#endif - .cfi_startproc -CNAME(ffi_closure_SYSV): - stp x29, x30, [sp, #-16]! - cfi_adjust_cfa_offset (16) - cfi_rel_offset (x29, 0) - cfi_rel_offset (x30, 8) - - mov x29, sp - cfi_def_cfa_register (x29) - - sub sp, sp, #ffi_closure_SYSV_FS - - stp x21, x22, [x29, #-16] - cfi_rel_offset (x21, -16) - cfi_rel_offset (x22, -8) - - /* Load x21 with &call_context. */ - mov x21, sp - /* Preserve our struct trampoline_data * */ - mov x22, x17 - - /* Save the rest of the argument passing registers. */ - stp x0, x1, [x21, #0] - stp x2, x3, [x21, #16] - stp x4, x5, [x21, #32] - stp x6, x7, [x21, #48] - /* Don't forget we may have been given a result scratch pad address. - */ - str x8, [x21, #64] - - /* Figure out if we should touch the vector registers. */ - ldr x0, [x22, #8] - tbz x0, #AARCH64_FFI_WITH_V_BIT, 1f - - /* Save the argument passing vector registers. */ - stp q0, q1, [x21, #8*32 + 0] - stp q2, q3, [x21, #8*32 + 32] - stp q4, q5, [x21, #8*32 + 64] - stp q6, q7, [x21, #8*32 + 96] -1: - /* Load &ffi_closure.. */ - ldr x0, [x22, #0] - mov x1, x21 - /* Compute the location of the stack at the point that the - trampoline was called. */ - add x2, x29, #16 - - bl CNAME(ffi_closure_SYSV_inner) - - /* Figure out if we should touch the vector registers. */ - ldr x0, [x22, #8] - tbz x0, #AARCH64_FFI_WITH_V_BIT, 1f - - /* Load the result passing vector registers. */ - ldp q0, q1, [x21, #8*32 + 0] - ldp q2, q3, [x21, #8*32 + 32] - ldp q4, q5, [x21, #8*32 + 64] - ldp q6, q7, [x21, #8*32 + 96] -1: - /* Load the result passing core registers. */ - ldp x0, x1, [x21, #0] - ldp x2, x3, [x21, #16] - ldp x4, x5, [x21, #32] - ldp x6, x7, [x21, #48] - /* Note nothing useful is returned in x8. */ - - /* We are done, unwind our frame. */ - ldp x21, x22, [x29, #-16] - cfi_restore (x21) - cfi_restore (x22) - - mov sp, x29 - cfi_def_cfa_register (sp) - - ldp x29, x30, [sp], #16 - cfi_adjust_cfa_offset (-16) - cfi_restore (x29) - cfi_restore (x30) - - ret - .cfi_endproc -#ifdef __ELF__ - .size CNAME(ffi_closure_SYSV), .-CNAME(ffi_closure_SYSV) -#endif |