The Tor Browser: xpcom/reflect/xptcall/src/md/unix/xptcstubs_asm

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: asm; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-

     2  * Version: MPL 1.1

     3  *

     4  * This Source Code Form is subject to the terms of the Mozilla Public

     5  * License, v. 2.0. If a copy of the MPL was not distributed with this

     6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     8 /* This code is for MIPS using the O32 ABI. */

    10 #include <sys/regdef.h>

    11 #include <sys/asm.h>

    13 	.text

    14 	.globl PrepareAndDispatch

    16 NARGSAVE=4  # extra space for the callee to use.  gccism

    17             # we can put our a0-a3 in our callers space.

    18 LOCALSZ=2   # gp, ra

    19 FRAMESZ=(((NARGSAVE+LOCALSZ)*SZREG)+ALSZ)&ALMASK

    21 define(STUB_NAME, `Stub'$1`__14nsXPTCStubBase')

    23 define(STUB_ENTRY,

    24 `	.globl		'STUB_NAME($1)`

    25 	.align		2

    26 	.type		'STUB_NAME($1)`,@function

    27 	.ent		'STUB_NAME($1)`, 0

    28 'STUB_NAME($1)`:

    29 	.frame		sp, FRAMESZ, ra

    30 	.set		noreorder

    31 	.cpload		t9

    32 	.set		reorder

    33 	subu		sp, FRAMESZ

    34 	.cprestore	16

    35 	li		t0, '$1`

    36 	b		sharedstub

    37 .end			'STUB_NAME($1)`

    39 ')

    41 define(SENTINEL_ENTRY, `')

    43 include(xptcstubsdef.inc)

    45 	.globl	sharedstub

    46 	.ent	sharedstub

    47 sharedstub:

    49 	REG_S	ra, 20(sp)

    51 	REG_S	a0, 24(sp)

    52 	REG_S	a1, 28(sp)

    53 	REG_S	a2, 32(sp)

    54 	REG_S	a3, 36(sp)

    56 	# t0 is methodIndex

    57 	move	a1, t0

    59 	# put the start of a1, a2, a3, and stack

    60 	move	a2, sp

    61 	addi	a2, 24  # have a2 point to sp + 24 (where a0 is)

    63 	# PrepareAndDispatch(that, methodIndex, args)

    64 	#                     a0       a1        a2

    65 	#

    66 	jal	PrepareAndDispatch

    68 	REG_L	ra, 20(sp)

    69 	REG_L	a1, 28(sp)

    70 	REG_L	a2, 32(sp)

    72 	addu	sp, FRAMESZ

    73 	j	ra

    75 .end sharedstub

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