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/* -*- mode: C; c-basic-offset: 3; -*- */
/*--------------------------------------------------------------------*/
/*--- MemCheck: some non-generic asm implementations of mc_main.c */
/*--- functions ---*/
/*--- mc_main_asm.c ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of MemCheck, a heavyweight Valgrind tool for
detecting memory errors.
Copyright (C) 2000-2018 Julian Seward
jseward@acm.org
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>.
The GNU General Public License is contained in the file COPYING.
*/
/* Having these in mc_main.c gives undefined references at link time,
when compiling with lto. Having them in a separate file solves this.
Also, for some toolchain, we might maybe need to disable lto. */
// A bunch of include only needed for mc_include.h
#include "pub_tool_basics.h"
#include "pub_tool_poolalloc.h"
#include "pub_tool_hashtable.h"
#include "pub_tool_tooliface.h"
#include "mc_include.h"
// Non-generic assembly for arm32-linux
#if ENABLE_ASSEMBLY_HELPERS && defined(PERF_FAST_LOADV) \
&& defined(VGP_arm_linux)
__asm__( /* Derived from the 32 bit assembly helper */
".text \n"
".align 2 \n"
".global vgMemCheck_helperc_LOADV64le \n"
".type vgMemCheck_helperc_LOADV64le, %function \n"
"vgMemCheck_helperc_LOADV64le: \n"
" tst r0, #7 \n"
" movw r3, #:lower16:primary_map \n"
" bne .LLV64LEc4 \n" // if misaligned
" lsr r2, r0, #16 \n"
" movt r3, #:upper16:primary_map \n"
" ldr r2, [r3, r2, lsl #2] \n"
" uxth r1, r0 \n" // r1 is 0-(16)-0 X-(13)-X 000
" movw r3, #0xAAAA \n"
" lsr r1, r1, #2 \n" // r1 is 0-(16)-0 00 X-(13)-X 0
" ldrh r1, [r2, r1] \n"
" cmp r1, r3 \n" // 0xAAAA == VA_BITS16_DEFINED
" bne .LLV64LEc0 \n" // if !all_defined
" mov r1, #0x0 \n" // 0x0 == V_BITS32_DEFINED
" mov r0, #0x0 \n" // 0x0 == V_BITS32_DEFINED
" bx lr \n"
".LLV64LEc0: \n"
" movw r3, #0x5555 \n"
" cmp r1, r3 \n" // 0x5555 == VA_BITS16_UNDEFINED
" bne .LLV64LEc4 \n" // if !all_undefined
" mov r1, #0xFFFFFFFF \n" // 0xFFFFFFFF == V_BITS32_UNDEFINED
" mov r0, #0xFFFFFFFF \n" // 0xFFFFFFFF == V_BITS32_UNDEFINED
" bx lr \n"
".LLV64LEc4: \n"
" push {r4, lr} \n"
" mov r2, #0 \n"
" mov r1, #64 \n"
" bl mc_LOADVn_slow \n"
" pop {r4, pc} \n"
".size vgMemCheck_helperc_LOADV64le, .-vgMemCheck_helperc_LOADV64le \n"
".previous\n"
);
#elif ENABLE_ASSEMBLY_HELPERS && defined(PERF_FAST_LOADV) \
&& (defined(VGP_x86_linux) || defined(VGP_x86_solaris))
__asm__(
".text\n"
".align 16\n"
".global vgMemCheck_helperc_LOADV64le\n"
".type vgMemCheck_helperc_LOADV64le, @function\n"
"vgMemCheck_helperc_LOADV64le:\n"
" test $0x7, %eax\n"
" jne .LLV64LE2\n" /* jump if not aligned */
" mov %eax, %ecx\n"
" movzwl %ax, %edx\n"
" shr $0x10, %ecx\n"
" mov primary_map(,%ecx,4), %ecx\n"
" shr $0x3, %edx\n"
" movzwl (%ecx,%edx,2), %edx\n"
" cmp $0xaaaa, %edx\n"
" jne .LLV64LE1\n" /* jump if not all defined */
" xor %eax, %eax\n" /* return 0 in edx:eax */
" xor %edx, %edx\n"
" ret\n"
".LLV64LE1:\n"
" cmp $0x5555, %edx\n"
" jne .LLV64LE2\n" /* jump if not all undefined */
" or $0xffffffff, %eax\n" /* else return all bits set in edx:eax */
" or $0xffffffff, %edx\n"
" ret\n"
".LLV64LE2:\n"
" xor %ecx, %ecx\n" /* tail call to mc_LOADVn_slow(a, 64, 0) */
" mov $64, %edx\n"
" jmp mc_LOADVn_slow\n"
".size vgMemCheck_helperc_LOADV64le, .-vgMemCheck_helperc_LOADV64le\n"
".previous\n"
);
#else
// Generic for all platforms except {arm32,x86}-linux and x86-solaris
// is in mc_main.c
#endif
// Non-generic assembly for arm32-linux
#if ENABLE_ASSEMBLY_HELPERS && defined(PERF_FAST_LOADV) \
&& defined(VGP_arm_linux)
__asm__( /* Derived from NCode template */
".text \n"
".align 2 \n"
".global vgMemCheck_helperc_LOADV32le \n"
".type vgMemCheck_helperc_LOADV32le, %function \n"
"vgMemCheck_helperc_LOADV32le: \n"
" tst r0, #3 \n" // 1
" movw r3, #:lower16:primary_map \n" // 1
" bne .LLV32LEc4 \n" // 2 if misaligned
" lsr r2, r0, #16 \n" // 3
" movt r3, #:upper16:primary_map \n" // 3
" ldr r2, [r3, r2, lsl #2] \n" // 4
" uxth r1, r0 \n" // 4
" ldrb r1, [r2, r1, lsr #2] \n" // 5
" cmp r1, #0xAA \n" // 6 0xAA == VA_BITS8_DEFINED
" bne .LLV32LEc0 \n" // 7 if !all_defined
" mov r0, #0x0 \n" // 8 0x0 == V_BITS32_DEFINED
" bx lr \n" // 9
".LLV32LEc0: \n"
" cmp r1, #0x55 \n" // 0x55 == VA_BITS8_UNDEFINED
" bne .LLV32LEc4 \n" // if !all_undefined
" mov r0, #0xFFFFFFFF \n" // 0xFFFFFFFF == V_BITS32_UNDEFINED
" bx lr \n"
".LLV32LEc4: \n"
" push {r4, lr} \n"
" mov r2, #0 \n"
" mov r1, #32 \n"
" bl mc_LOADVn_slow \n"
" pop {r4, pc} \n"
".size vgMemCheck_helperc_LOADV32le, .-vgMemCheck_helperc_LOADV32le \n"
".previous\n"
);
#elif ENABLE_ASSEMBLY_HELPERS && defined(PERF_FAST_LOADV) \
&& (defined(VGP_x86_linux) || defined(VGP_x86_solaris))
__asm__(
".text\n"
".align 16\n"
".global vgMemCheck_helperc_LOADV32le\n"
".type vgMemCheck_helperc_LOADV32le, @function\n"
"vgMemCheck_helperc_LOADV32le:\n"
" test $0x3, %eax\n"
" jnz .LLV32LE2\n" /* jump if misaligned */
" mov %eax, %edx\n"
" shr $16, %edx\n"
" mov primary_map(,%edx,4), %ecx\n"
" movzwl %ax, %edx\n"
" shr $2, %edx\n"
" movzbl (%ecx,%edx,1), %edx\n"
" cmp $0xaa, %edx\n" /* compare to VA_BITS8_DEFINED */
" jne .LLV32LE1\n" /* jump if not completely defined */
" xor %eax, %eax\n" /* else return V_BITS32_DEFINED */
" ret\n"
".LLV32LE1:\n"
" cmp $0x55, %edx\n" /* compare to VA_BITS8_UNDEFINED */
" jne .LLV32LE2\n" /* jump if not completely undefined */
" or $0xffffffff, %eax\n" /* else return V_BITS32_UNDEFINED */
" ret\n"
".LLV32LE2:\n"
" xor %ecx, %ecx\n" /* tail call mc_LOADVn_slow(a, 32, 0) */
" mov $32, %edx\n"
" jmp mc_LOADVn_slow\n"
".size vgMemCheck_helperc_LOADV32le, .-vgMemCheck_helperc_LOADV32le\n"
".previous\n"
);
#else
// Generic for all platforms except {arm32,x86}-linux and x86-solaris
// is in mc_main.c
#endif
/*--------------------------------------------------------------------*/
/*--- end ---*/
/*--------------------------------------------------------------------*/
|
