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ntdll: Implement a faster Unix call dispatcher on ARM64.

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This commit is contained in:
Alexandre Julliard 2022-11-30 22:17:19 +01:00
parent 5277c75406
commit 2332fe7935
2 changed files with 44 additions and 4 deletions
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2
dlls/ntdll/unix/loader.c
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@ -2190,7 +2190,7 @@ static void start_main_thread(void)
if (main_image_info.Machine != current_machine) load_wow64_ntdll( main_image_info.Machine );
load_apiset_dll();
ntdll_init_syscalls( 0, &syscall_table, p__wine_syscall_dispatcher );
#if defined(__i386__) || defined(__x86_64__)
#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__)
*p__wine_unix_call_dispatcher = __wine_unix_call_dispatcher;
#endif
server_init_process_done();

46
dlls/ntdll/unix/signal_arm64.c
View file

@ -1522,7 +1522,8 @@ __ASM_GLOBAL_FUNC( __wine_syscall_dispatcher,
"ldr x16, [x16, x20, lsl 3]\n\t"
"blr x16\n\t"
"mov sp, x22\n"
"3:\tldp x18, x19, [sp, #0x90]\n\t"
".L__wine_syscall_dispatcher_return:\n\t"
"ldp x18, x19, [sp, #0x90]\n\t"
"ldp x20, x21, [sp, #0xa0]\n\t"
"ldp x22, x23, [sp, #0xb0]\n\t"
"ldp x24, x25, [sp, #0xc0]\n\t"
@ -1566,12 +1567,51 @@ __ASM_GLOBAL_FUNC( __wine_syscall_dispatcher,
"ret x16\n"
"4:\tmov x0, #0xc0000000\n\t" /* STATUS_INVALID_PARAMETER */
"movk x0, #0x000d\n\t"
"b 3b\n\t"
"b .L__wine_syscall_dispatcher_return\n\t"
".globl " __ASM_NAME("__wine_syscall_dispatcher_return") "\n"
__ASM_NAME("__wine_syscall_dispatcher_return") ":\n\t"
"mov sp, x0\n\t"
"mov x0, x1\n\t"
"b 3b" )
"b .L__wine_syscall_dispatcher_return" )
/***********************************************************************
* __wine_unix_call_dispatcher
*/
__ASM_GLOBAL_FUNC( __wine_unix_call_dispatcher,
/* FIXME: use x18 directly instead */
"stp x0, x1, [sp, #-32]!\n\t"
"stp x2, x30,[sp, #16]\n\t"
"bl " __ASM_NAME("NtCurrentTeb") "\n\t"
"mov x18, x0\n\t"
"ldp x2, x30,[sp, #16]\n\t"
"ldp x0, x1, [sp], #32\n\t"
"ldr x10, [x18, #0x2f8]\n\t" /* arm64_thread_data()->syscall_frame */
"stp x18, x19, [x10, #0x90]\n\t"
"stp x20, x21, [x10, #0xa0]\n\t"
"stp x22, x23, [x10, #0xb0]\n\t"
"stp x24, x25, [x10, #0xc0]\n\t"
"stp x26, x27, [x10, #0xd0]\n\t"
"stp x28, x29, [x10, #0xe0]\n\t"
"stp q8, q9, [x10, #0x1b0]\n\t"
"stp q10, q11, [x10, #0x1d0]\n\t"
"stp q12, q13, [x10, #0x1f0]\n\t"
"stp q14, q15, [x10, #0x210]\n\t"
"mov x9, sp\n\t"
"stp x30, x9, [x10, #0xf0]\n\t"
"mrs x9, NZCV\n\t"
"stp x30, x9, [x10, #0x100]\n\t"
"mov sp, x10\n\t"
"ldr x16, [x0, x1, lsl 3]\n\t"
"mov x0, x2\n\t" /* args */
"blr x16\n\t"
"ldr w16, [sp, #0x10c]\n\t" /* frame->restore_flags */
"cbnz w16, .L__wine_syscall_dispatcher_return\n\t"
"ldr x18, [sp, #0x90]\n\t"
"ldp x16, x17, [sp, #0xf8]\n\t"
"mov sp, x16\n\t"
"ret x17" )
/***********************************************************************