xpcom/reflect/xptcall/src/md/unix/xptcstubs_asm_mips.S@b8a032363ba2 (annotated)
xpcom/reflect/xptcall/src/md/unix/xptcstubs_asm_mips.S
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* -*- Mode: asm; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | /* This code is for MIPS using the O32 ABI. */ |
| michael@0 | 7 | |
| michael@0 | 8 | #ifdef ANDROID |
| michael@0 | 9 | #include <asm/regdef.h> |
| michael@0 | 10 | #include <asm/asm.h> |
| michael@0 | 11 | #include <machine/asm.h> |
| michael@0 | 12 | #else |
| michael@0 | 13 | #include <sys/regdef.h> |
| michael@0 | 14 | #include <sys/asm.h> |
| michael@0 | 15 | #endif |
| michael@0 | 16 | |
| michael@0 | 17 | # NARGSAVE is the argument space in the callers frame, including extra |
| michael@0 | 18 | # 'shadowed' space for the argument registers. The minimum of 4 |
| michael@0 | 19 | # argument slots is sometimes predefined in the header files. |
| michael@0 | 20 | #ifndef NARGSAVE |
| michael@0 | 21 | #define NARGSAVE 4 |
| michael@0 | 22 | #endif |
| michael@0 | 23 | |
| michael@0 | 24 | #define LOCALSZ 2 /* gp, ra */ |
| michael@0 | 25 | #define FRAMESZ ((((NARGSAVE+LOCALSZ)*SZREG)+ALSZ)&ALMASK) |
| michael@0 | 26 | |
| michael@0 | 27 | #define RAOFF (FRAMESZ - (1*SZREG)) |
| michael@0 | 28 | #define GPOFF (FRAMESZ - (2*SZREG)) |
| michael@0 | 29 | |
| michael@0 | 30 | #define A0OFF (FRAMESZ + (0*SZREG)) |
| michael@0 | 31 | #define A1OFF (FRAMESZ + (1*SZREG)) |
| michael@0 | 32 | #define A2OFF (FRAMESZ + (2*SZREG)) |
| michael@0 | 33 | #define A3OFF (FRAMESZ + (3*SZREG)) |
| michael@0 | 34 | |
| michael@0 | 35 | .text |
| michael@0 | 36 | |
| michael@0 | 37 | #define STUB_ENTRY(x) \ |
| michael@0 | 38 | .if x < 10; \ |
| michael@0 | 39 | .globl _ZN14nsXPTCStubBase5Stub ##x ##Ev; \ |
| michael@0 | 40 | .type _ZN14nsXPTCStubBase5Stub ##x ##Ev,@function; \ |
| michael@0 | 41 | .aent _ZN14nsXPTCStubBase5Stub ##x ##Ev,0; \ |
| michael@0 | 42 | _ZN14nsXPTCStubBase5Stub ##x ##Ev:; \ |
| michael@0 | 43 | SETUP_GP; \ |
| michael@0 | 44 | li t0,x; \ |
| michael@0 | 45 | b sharedstub; \ |
| michael@0 | 46 | .elseif x < 100; \ |
| michael@0 | 47 | .globl _ZN14nsXPTCStubBase6Stub ##x ##Ev; \ |
| michael@0 | 48 | .type _ZN14nsXPTCStubBase6Stub ##x ##Ev,@function; \ |
| michael@0 | 49 | .aent _ZN14nsXPTCStubBase6Stub ##x ##Ev,0; \ |
| michael@0 | 50 | _ZN14nsXPTCStubBase6Stub ##x ##Ev:; \ |
| michael@0 | 51 | SETUP_GP; \ |
| michael@0 | 52 | li t0,x; \ |
| michael@0 | 53 | b sharedstub; \ |
| michael@0 | 54 | .elseif x < 1000; \ |
| michael@0 | 55 | .globl _ZN14nsXPTCStubBase7Stub ##x ##Ev; \ |
| michael@0 | 56 | .type _ZN14nsXPTCStubBase7Stub ##x ##Ev,@function; \ |
| michael@0 | 57 | .aent _ZN14nsXPTCStubBase7Stub ##x ##Ev,0; \ |
| michael@0 | 58 | _ZN14nsXPTCStubBase7Stub ##x ##Ev:; \ |
| michael@0 | 59 | SETUP_GP; \ |
| michael@0 | 60 | li t0,x; \ |
| michael@0 | 61 | b sharedstub; \ |
| michael@0 | 62 | .else; \ |
| michael@0 | 63 | .err; \ |
| michael@0 | 64 | .endif |
| michael@0 | 65 | |
| michael@0 | 66 | # SENTINEL_ENTRY is handled in the cpp file. |
| michael@0 | 67 | #define SENTINEL_ENTRY(x) |
| michael@0 | 68 | |
| michael@0 | 69 | # |
| michael@0 | 70 | # open a dummy frame for the function entries |
| michael@0 | 71 | # |
| michael@0 | 72 | .align 2 |
| michael@0 | 73 | .type dummy,@function |
| michael@0 | 74 | .ent dummy, 0 |
| michael@0 | 75 | .frame sp, FRAMESZ, ra |
| michael@0 | 76 | dummy: |
| michael@0 | 77 | SETUP_GP |
| michael@0 | 78 | |
| michael@0 | 79 | #include "xptcstubsdef.inc" |
| michael@0 | 80 | |
| michael@0 | 81 | sharedstub: |
| michael@0 | 82 | subu sp, FRAMESZ |
| michael@0 | 83 | |
| michael@0 | 84 | # specify the save register mask for gp, ra, a0-a3 |
| michael@0 | 85 | .mask 0x900000F0, RAOFF-FRAMESZ |
| michael@0 | 86 | |
| michael@0 | 87 | sw ra, RAOFF(sp) |
| michael@0 | 88 | SAVE_GP(GPOFF) |
| michael@0 | 89 | |
| michael@0 | 90 | # Micro-optimization: a0 is already loaded, and its slot gets |
| michael@0 | 91 | # ignored by PrepareAndDispatch, so no need to save it here. |
| michael@0 | 92 | # sw a0, A0OFF(sp) |
| michael@0 | 93 | sw a1, A1OFF(sp) |
| michael@0 | 94 | sw a2, A2OFF(sp) |
| michael@0 | 95 | sw a3, A3OFF(sp) |
| michael@0 | 96 | |
| michael@0 | 97 | la t9, PrepareAndDispatch |
| michael@0 | 98 | |
| michael@0 | 99 | # t0 is methodIndex |
| michael@0 | 100 | move a1, t0 |
| michael@0 | 101 | # have a2 point to the begin of the argument space on stack |
| michael@0 | 102 | addiu a2, sp, FRAMESZ |
| michael@0 | 103 | |
| michael@0 | 104 | # PrepareAndDispatch(that, methodIndex, args) |
| michael@0 | 105 | jalr t9 |
| michael@0 | 106 | |
| michael@0 | 107 | # Micro-optimization: Using jalr explicitly has the side-effect |
| michael@0 | 108 | # of not triggering .cprestore. This is ok because we have no |
| michael@0 | 109 | # gp reference below this point. It also allows better |
| michael@0 | 110 | # instruction sscheduling. |
| michael@0 | 111 | # lw gp, GPOFF(fp) |
| michael@0 | 112 | |
| michael@0 | 113 | lw ra, RAOFF(sp) |
| michael@0 | 114 | addiu sp, FRAMESZ |
| michael@0 | 115 | j ra |
| michael@0 | 116 | END(dummy) |
