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comparison: xpcom/reflect/xptcall/src/md/unix/xptcstubs_asm_mips.S
xpcom/reflect/xptcall/src/md/unix/xptcstubs_asm_mips.S
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:f91b1d8e0b10 |
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| 1 /* -*- Mode: asm; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 /* This code is for MIPS using the O32 ABI. */ | |
| 7 | |
| 8 #ifdef ANDROID | |
| 9 #include <asm/regdef.h> | |
| 10 #include <asm/asm.h> | |
| 11 #include <machine/asm.h> | |
| 12 #else | |
| 13 #include <sys/regdef.h> | |
| 14 #include <sys/asm.h> | |
| 15 #endif | |
| 16 | |
| 17 # NARGSAVE is the argument space in the callers frame, including extra | |
| 18 # 'shadowed' space for the argument registers. The minimum of 4 | |
| 19 # argument slots is sometimes predefined in the header files. | |
| 20 #ifndef NARGSAVE | |
| 21 #define NARGSAVE 4 | |
| 22 #endif | |
| 23 | |
| 24 #define LOCALSZ 2 /* gp, ra */ | |
| 25 #define FRAMESZ ((((NARGSAVE+LOCALSZ)*SZREG)+ALSZ)&ALMASK) | |
| 26 | |
| 27 #define RAOFF (FRAMESZ - (1*SZREG)) | |
| 28 #define GPOFF (FRAMESZ - (2*SZREG)) | |
| 29 | |
| 30 #define A0OFF (FRAMESZ + (0*SZREG)) | |
| 31 #define A1OFF (FRAMESZ + (1*SZREG)) | |
| 32 #define A2OFF (FRAMESZ + (2*SZREG)) | |
| 33 #define A3OFF (FRAMESZ + (3*SZREG)) | |
| 34 | |
| 35 .text | |
| 36 | |
| 37 #define STUB_ENTRY(x) \ | |
| 38 .if x < 10; \ | |
| 39 .globl _ZN14nsXPTCStubBase5Stub ##x ##Ev; \ | |
| 40 .type _ZN14nsXPTCStubBase5Stub ##x ##Ev,@function; \ | |
| 41 .aent _ZN14nsXPTCStubBase5Stub ##x ##Ev,0; \ | |
| 42 _ZN14nsXPTCStubBase5Stub ##x ##Ev:; \ | |
| 43 SETUP_GP; \ | |
| 44 li t0,x; \ | |
| 45 b sharedstub; \ | |
| 46 .elseif x < 100; \ | |
| 47 .globl _ZN14nsXPTCStubBase6Stub ##x ##Ev; \ | |
| 48 .type _ZN14nsXPTCStubBase6Stub ##x ##Ev,@function; \ | |
| 49 .aent _ZN14nsXPTCStubBase6Stub ##x ##Ev,0; \ | |
| 50 _ZN14nsXPTCStubBase6Stub ##x ##Ev:; \ | |
| 51 SETUP_GP; \ | |
| 52 li t0,x; \ | |
| 53 b sharedstub; \ | |
| 54 .elseif x < 1000; \ | |
| 55 .globl _ZN14nsXPTCStubBase7Stub ##x ##Ev; \ | |
| 56 .type _ZN14nsXPTCStubBase7Stub ##x ##Ev,@function; \ | |
| 57 .aent _ZN14nsXPTCStubBase7Stub ##x ##Ev,0; \ | |
| 58 _ZN14nsXPTCStubBase7Stub ##x ##Ev:; \ | |
| 59 SETUP_GP; \ | |
| 60 li t0,x; \ | |
| 61 b sharedstub; \ | |
| 62 .else; \ | |
| 63 .err; \ | |
| 64 .endif | |
| 65 | |
| 66 # SENTINEL_ENTRY is handled in the cpp file. | |
| 67 #define SENTINEL_ENTRY(x) | |
| 68 | |
| 69 # | |
| 70 # open a dummy frame for the function entries | |
| 71 # | |
| 72 .align 2 | |
| 73 .type dummy,@function | |
| 74 .ent dummy, 0 | |
| 75 .frame sp, FRAMESZ, ra | |
| 76 dummy: | |
| 77 SETUP_GP | |
| 78 | |
| 79 #include "xptcstubsdef.inc" | |
| 80 | |
| 81 sharedstub: | |
| 82 subu sp, FRAMESZ | |
| 83 | |
| 84 # specify the save register mask for gp, ra, a0-a3 | |
| 85 .mask 0x900000F0, RAOFF-FRAMESZ | |
| 86 | |
| 87 sw ra, RAOFF(sp) | |
| 88 SAVE_GP(GPOFF) | |
| 89 | |
| 90 # Micro-optimization: a0 is already loaded, and its slot gets | |
| 91 # ignored by PrepareAndDispatch, so no need to save it here. | |
| 92 # sw a0, A0OFF(sp) | |
| 93 sw a1, A1OFF(sp) | |
| 94 sw a2, A2OFF(sp) | |
| 95 sw a3, A3OFF(sp) | |
| 96 | |
| 97 la t9, PrepareAndDispatch | |
| 98 | |
| 99 # t0 is methodIndex | |
| 100 move a1, t0 | |
| 101 # have a2 point to the begin of the argument space on stack | |
| 102 addiu a2, sp, FRAMESZ | |
| 103 | |
| 104 # PrepareAndDispatch(that, methodIndex, args) | |
| 105 jalr t9 | |
| 106 | |
| 107 # Micro-optimization: Using jalr explicitly has the side-effect | |
| 108 # of not triggering .cprestore. This is ok because we have no | |
| 109 # gp reference below this point. It also allows better | |
| 110 # instruction sscheduling. | |
| 111 # lw gp, GPOFF(fp) | |
| 112 | |
| 113 lw ra, RAOFF(sp) | |
| 114 addiu sp, FRAMESZ | |
| 115 j ra | |
| 116 END(dummy) |
