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annotate usr/src/cmd/sgs/rtld/amd64/boot_elf.s @ 6186:ae3aa141e3fa

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6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
author bholler
date Thu, 13 Mar 2008 20:31:14 -0700
parents 685e2f65770b
children a9ae30c28ee4
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1 /*
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2 * CDDL HEADER START
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3 *
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4 * The contents of this file are subject to the terms of the
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5 * Common Development and Distribution License (the "License").
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6 * You may not use this file except in compliance with the License.
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7 *
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8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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9 * or http://www.opensolaris.org/os/licensing.
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10 * See the License for the specific language governing permissions
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11 * and limitations under the License.
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12 *
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13 * When distributing Covered Code, include this CDDL HEADER in each
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14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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15 * If applicable, add the following below this CDDL HEADER, with the
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16 * fields enclosed by brackets "[]" replaced with your own identifying
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17 * information: Portions Copyright [yyyy] [name of copyright owner]
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18 *
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19 * CDDL HEADER END
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20 */
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21
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22 /*
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23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
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24 * Use is subject to license terms.
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25 */
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26
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27 #pragma ident "%Z%%M% %I% %E% SMI"
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28
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29 #if defined(lint)
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30
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31 #include <sys/types.h>
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32 #include <_rtld.h>
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33 #include <_audit.h>
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34 #include <_elf.h>
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35 #include <sys/regset.h>
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36
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37 /* ARGSUSED0 */
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38 int
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39 elf_plt_trace()
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40 {
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41 return (0);
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42 }
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43 #else
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44
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45 #include <link.h>
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46 #include <_audit.h>
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47 #include <sys/asm_linkage.h>
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48
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49 .file "boot_elf.s"
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50 .text
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51
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52 /*
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53 * On entry the 'glue code' has already done the following:
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54 *
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55 * pushq %rbp
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56 * movq %rsp, %rbp
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57 * subq $0x10, %rsp
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58 * leaq trace_fields(%rip), %r11
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59 * movq %r11, -0x8(%rbp)
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60 * movq $elf_plt_trace, %r11
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61 * jmp *%r11
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62 *
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63 * so - -8(%rbp) contains the dyndata ptr
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64 *
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65 * 0x0 Addr *reflmp
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66 * 0x8 Addr *deflmp
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67 * 0x10 Word symndx
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68 * 0x14 Word sb_flags
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69 * 0x18 Sym symdef.st_name
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70 * 0x1c symdef.st_info
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71 * 0x1d symdef.st_other
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72 * 0x1e symdef.st_shndx
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73 * 0x20 symdef.st_value
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74 * 0x28 symdef.st_size
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75 *
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76 * Also note - on entry 16 bytes have already been subtracted
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77 * from the %rsp. The first 8 bytes is for the dyn_data_ptr,
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78 * the second 8 bytes are to align the stack and are available
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79 * for use.
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80 */
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81 #define REFLMP_OFF 0x0
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82 #define DEFLMP_OFF 0x8
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83 #define SYMNDX_OFF 0x10
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84 #define SBFLAGS_OFF 0x14
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85 #define SYMDEF_OFF 0x18
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86 #define SYMDEF_VALUE_OFF 0x20
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87 /*
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88 * Local stack space storage for elf_plt_trace is allocated
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89 * as follows:
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90 *
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91 * First - before we got here - %rsp has been decremented
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92 * by 0x10 to make space for the dyndata ptr (and another
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93 * free word). In addition to that, we create space
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94 * for the following:
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95 *
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96 * La_amd64_regs 8 * 8: 64
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97 * prev_stack_size 8 8
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98 * Saved regs:
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99 * %rdi 8
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100 * %rsi 8
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101 * %rdx 8
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102 * %rcx 8
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103 * %r8 8
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104 * %r9 8
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105 * %r10 8
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106 * %r11 8
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107 * %rax 8
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108 * =======
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109 * Subtotal: 144 (16byte aligned)
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110 *
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111 * Saved Media Regs (used to pass floating point args):
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112 * %xmm0 - %xmm7 16 * 8: 128
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113 * =======
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114 * Total: 272 (16byte aligned)
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115 *
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116 * So - will subtract the following to create enough space
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117 *
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118 * -8(%rbp) store dyndata ptr
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119 * -16(%rbp) store call destination
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120 * -80(%rbp) space for La_amd64_regs
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121 * -88(%rbp) prev stack size
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122 * The next %rbp offsets are only true if the caller had correct stack
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123 * alignment. See note above SPRDIOFF for why we use %rsp alignment to
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124 * access these stack fields.
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125 * -96(%rbp) entering %rdi
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126 * -104(%rbp) entering %rsi
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127 * -112(%rbp) entering %rdx
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128 * -120(%rbp) entering %rcx
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129 * -128(%rbp) entering %r8
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130 * -136(%rbp) entering %r9
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131 * -144(%rbp) entering %r10
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132 * -152(%rbp) entering %r11
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133 * -160(%rbp) entering %rax
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134 * -176(%rbp) entering %xmm0
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135 * -192(%rbp) entering %xmm1
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136 * -208(%rbp) entering %xmm2
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137 * -224(%rbp) entering %xmm3
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138 * -240(%rbp) entering %xmm4
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139 * -256(%rbp) entering %xmm5
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140 * -272(%rbp) entering %xmm6
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141 * -288(%rbp) entering %xmm7
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142 *
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143 */
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144 #define SPDYNOFF -8
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145 #define SPDESTOFF -16
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146 #define SPLAREGOFF -80
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147 #define SPPRVSTKOFF -88
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148
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149 /*
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150 * The next set of offsets are relative to %rsp.
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151 * We guarantee %rsp is ABI compliant 16-byte aligned. This guarantees the
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152 * xmm registers are saved to 16-byte aligned addresses.
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153 * %rbp may only be 8 byte aligned if we came in from non-ABI compliant code.
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154 */
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155 #define SPRDIOFF 192
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156 #define SPRSIOFF 184
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157 #define SPRDXOFF 176
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158 #define SPRCXOFF 168
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159 #define SPR8OFF 160
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160 #define SPR9OFF 152
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161 #define SPR10OFF 144
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162 #define SPR11OFF 136
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163 #define SPRAXOFF 128
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164 #define SPXMM0OFF 112
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165 #define SPXMM1OFF 96
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166 #define SPXMM2OFF 80
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167 #define SPXMM3OFF 64
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168 #define SPXMM4OFF 48
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169 #define SPXMM5OFF 32
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170 #define SPXMM6OFF 16
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171 #define SPXMM7OFF 0
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172
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173 .globl elf_plt_trace
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174 .type elf_plt_trace,@function
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175 .align 16
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176 elf_plt_trace:
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177 /*
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178 * Enforce ABI 16-byte stack alignment here.
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179 * The next andq instruction does this pseudo code:
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180 * If %rsp is 8 byte aligned then subtract 8 from %rsp.
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181 */
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182 andq $-16, %rsp /* enforce ABI 16-byte stack alignment */
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183 subq $272,%rsp / create some local storage
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184
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185 movq %rdi, SPRDIOFF(%rsp)
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186 movq %rsi, SPRSIOFF(%rsp)
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187 movq %rdx, SPRDXOFF(%rsp)
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188 movq %rcx, SPRCXOFF(%rsp)
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189 movq %r8, SPR8OFF(%rsp)
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190 movq %r9, SPR9OFF(%rsp)
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191 movq %r10, SPR10OFF(%rsp)
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192 movq %r11, SPR11OFF(%rsp)
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193 movq %rax, SPRAXOFF(%rsp)
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194 movdqa %xmm0, SPXMM0OFF(%rsp)
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195 movdqa %xmm1, SPXMM1OFF(%rsp)
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196 movdqa %xmm2, SPXMM2OFF(%rsp)
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197 movdqa %xmm3, SPXMM3OFF(%rsp)
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198 movdqa %xmm4, SPXMM4OFF(%rsp)
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199 movdqa %xmm5, SPXMM5OFF(%rsp)
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200 movdqa %xmm6, SPXMM6OFF(%rsp)
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201 movdqa %xmm7, SPXMM7OFF(%rsp)
0
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202
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203 movq SPDYNOFF(%rbp), %rax / %rax = dyndata
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204 testb $LA_SYMB_NOPLTENTER, SBFLAGS_OFF(%rax) / <link.h>
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205 je .start_pltenter
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206 movq SYMDEF_VALUE_OFF(%rax), %rdi
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207 movq %rdi, SPDESTOFF(%rbp) / save destination address
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208 jmp .end_pltenter
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209
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210 .start_pltenter:
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211 /*
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212 * save all registers into La_amd64_regs
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213 */
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214 leaq SPLAREGOFF(%rbp), %rsi / %rsi = &La_amd64_regs
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215 leaq 8(%rbp), %rdi
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216 movq %rdi, 0(%rsi) / la_rsp
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217 movq 0(%rbp), %rdi
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218 movq %rdi, 8(%rsi) / la_rbp
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219 movq SPRDIOFF(%rsp), %rdi
0
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220 movq %rdi, 16(%rsi) / la_rdi
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221 movq SPRSIOFF(%rsp), %rdi
0
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222 movq %rdi, 24(%rsi) / la_rsi
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223 movq SPRDXOFF(%rsp), %rdi
0
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224 movq %rdi, 32(%rsi) / la_rdx
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225 movq SPRCXOFF(%rsp), %rdi
0
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226 movq %rdi, 40(%rsi) / la_rcx
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227 movq SPR8OFF(%rsp), %rdi
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228 movq %rdi, 48(%rsi) / la_r8
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229 movq SPR9OFF(%rsp), %rdi
0
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230 movq %rdi, 56(%rsi) / la_r9
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231
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232 /*
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233 * prepare for call to la_pltenter
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234 */
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235 movq SPDYNOFF(%rbp), %r11 / %r11 = &dyndata
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236 leaq SBFLAGS_OFF(%r11), %r9 / arg6 (&sb_flags)
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237 leaq SPLAREGOFF(%rbp), %r8 / arg5 (&La_amd64_regs)
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238 movl SYMNDX_OFF(%r11), %ecx / arg4 (symndx)
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239 leaq SYMDEF_OFF(%r11), %rdx / arg3 (&Sym)
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240 movq DEFLMP_OFF(%r11), %rsi / arg2 (dlmp)
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241 movq REFLMP_OFF(%r11), %rdi / arg1 (rlmp)
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242 call audit_pltenter@PLT
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243 movq %rax, SPDESTOFF(%rbp) / save calling address
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244 .end_pltenter:
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245
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246 /*
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247 * If *no* la_pltexit() routines exist
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248 * we do not need to keep the stack frame
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249 * before we call the actual routine. Instead we
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250 * jump to it and remove our stack from the stack
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251 * at the same time.
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252 */
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253 movl audit_flags(%rip), %eax
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254 andl $AF_PLTEXIT, %eax / value of audit.h:AF_PLTEXIT
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255 cmpl $0, %eax
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256 je .bypass_pltexit
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257 /*
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258 * Has the *nopltexit* flag been set for this entry point
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259 */
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260 movq SPDYNOFF(%rbp), %r11 / %r11 = &dyndata
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261 testb $LA_SYMB_NOPLTEXIT, SBFLAGS_OFF(%r11)
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262 je .start_pltexit
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263
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264 .bypass_pltexit:
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265 /*
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266 * No PLTEXIT processing required.
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267 */
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268 movq 0(%rbp), %r11
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269 movq %r11, -8(%rbp) / move prev %rbp
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270 movq SPDESTOFF(%rbp), %r11 / r11 == calling destination
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271 movq %r11, 0(%rbp) / store destination at top
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272
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273 /
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274 / Restore registers
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275 /
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276 movq SPRDIOFF(%rsp), %rdi
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277 movq SPRSIOFF(%rsp), %rsi
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278 movq SPRDXOFF(%rsp), %rdx
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279 movq SPRCXOFF(%rsp), %rcx
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280 movq SPR8OFF(%rsp), %r8
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281 movq SPR9OFF(%rsp), %r9
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282 movq SPR10OFF(%rsp), %r10
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283 movq SPR11OFF(%rsp), %r11
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284 movq SPRAXOFF(%rsp), %rax
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285 movdqa SPXMM0OFF(%rsp), %xmm0
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286 movdqa SPXMM1OFF(%rsp), %xmm1
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287 movdqa SPXMM2OFF(%rsp), %xmm2
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288 movdqa SPXMM3OFF(%rsp), %xmm3
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289 movdqa SPXMM4OFF(%rsp), %xmm4
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290 movdqa SPXMM5OFF(%rsp), %xmm5
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291 movdqa SPXMM6OFF(%rsp), %xmm6
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292 movdqa SPXMM7OFF(%rsp), %xmm7
0
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293
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294 subq $8, %rbp / adjust %rbp for 'ret'
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295 movq %rbp, %rsp /
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296 /*
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297 * At this point, after a little doctoring, we should
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298 * have the following on the stack:
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299 *
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300 * 16(%rsp): ret addr
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301 * 8(%rsp): dest_addr
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302 * 0(%rsp): Previous %rbp
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303 *
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304 * So - we pop the previous %rbp, and then
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305 * ret to our final destination.
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306 */
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307 popq %rbp /
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308 ret / jmp to final destination
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309 / and clean up stack :)
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310
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311 .start_pltexit:
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312 /*
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313 * In order to call the destination procedure and then return
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314 * to audit_pltexit() for post analysis we must first grow
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315 * our stack frame and then duplicate the original callers
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316 * stack state. This duplicates all of the arguements
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317 * that were to be passed to the destination procedure.
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318 */
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319 movq %rbp, %rdi /
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320 addq $16, %rdi / %rdi = src
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321 movq (%rbp), %rdx /
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322 subq %rdi, %rdx / %rdx == prev frame sz
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323 /*
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324 * If audit_argcnt > 0 then we limit the number of
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325 * arguements that will be duplicated to audit_argcnt.
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326 *
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327 * If (prev_stack_size > (audit_argcnt * 8))
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328 * prev_stack_size = audit_argcnt * 8;
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329 */
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330 movl audit_argcnt(%rip),%eax / %eax = audit_argcnt
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331 cmpl $0, %eax
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332 jle .grow_stack
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333 leaq (,%rax,8), %rax / %eax = %eax * 4
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334 cmpq %rax,%rdx
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335 jle .grow_stack
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336 movq %rax, %rdx
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337 /*
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338 * Grow the stack and duplicate the arguements of the
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339 * original caller.
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340 *
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341 * We save %rsp in %r11 since we need to use the current rsp for
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342 * accessing the registers saved in our stack frame.
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343 */
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344 .grow_stack:
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345 movq %rsp, %r11
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346 subq %rdx, %rsp / grow the stack
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347 movq %rdx, SPPRVSTKOFF(%rbp) / -88(%rbp) == prev frame sz
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348 movq %rsp, %rcx / %rcx = dest
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349 addq %rcx, %rdx / %rdx == tail of dest
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350 .while_base:
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351 cmpq %rdx, %rcx / while (base+size >= src++) {
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352 jge .end_while /
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353 movq (%rdi), %rsi
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354 movq %rsi,(%rcx) / *dest = *src
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355 addq $8, %rdi / src++
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356 addq $8, %rcx / dest++
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357 jmp .while_base / }
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358
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359 /*
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360 * The above stack is now an exact duplicate of
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361 * the stack of the original calling procedure.
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362 */
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363 .end_while:
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364 /
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365 / Restore registers using %r11 which contains our old %rsp value
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366 / before growing the stack.
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367 /
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368 movq SPRDIOFF(%r11), %rdi
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369 movq SPRSIOFF(%r11), %rsi
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370 movq SPRDXOFF(%r11), %rdx
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371 movq SPRCXOFF(%r11), %rcx
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372 movq SPR8OFF(%r11), %r8
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373 movq SPR9OFF(%r11), %r9
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374 movq SPR10OFF(%r11), %r10
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375 movq SPRAXOFF(%r11), %rax
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376 movdqa SPXMM0OFF(%r11), %xmm0
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377 movdqa SPXMM1OFF(%r11), %xmm1
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378 movdqa SPXMM2OFF(%r11), %xmm2
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379 movdqa SPXMM3OFF(%r11), %xmm3
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380 movdqa SPXMM4OFF(%r11), %xmm4
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381 movdqa SPXMM5OFF(%r11), %xmm5
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382 movdqa SPXMM6OFF(%r11), %xmm6
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383 movdqa SPXMM7OFF(%r11), %xmm7
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384 movq SPR11OFF(%r11), %r11 / retore %r11 last
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385
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386 /*
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387 * Call to desitnation function - we'll return here
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388 * for pltexit monitoring.
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389 */
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390 call *SPDESTOFF(%rbp)
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391
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392 addq SPPRVSTKOFF(%rbp), %rsp / cleanup dupped stack
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393
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394 /
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395 / prepare for call to audit_pltenter()
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396 /
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397 movq SPDYNOFF(%rbp), %r11 / %r11 = &dyndata
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398 movq SYMNDX_OFF(%r11), %r8 / arg5 (symndx)
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399 leaq SYMDEF_OFF(%r11), %rcx / arg4 (&Sym)
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400 movq DEFLMP_OFF(%r11), %rdx / arg3 (dlmp)
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401 movq REFLMP_OFF(%r11), %rsi / arg2 (rlmp)
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402 movq %rax, %rdi / arg1 (returnval)
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403 call audit_pltexit@PLT
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404
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405 /*
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406 * Clean up after ourselves and return to the
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407 * original calling procedure.
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408 */
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409
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410 /
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411 / Restore registers
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412 /
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413 movq SPRDIOFF(%rsp), %rdi
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414 movq SPRSIOFF(%rsp), %rsi
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415 movq SPRDXOFF(%rsp), %rdx
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416 movq SPRCXOFF(%rsp), %rcx
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417 movq SPR8OFF(%rsp), %r8
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418 movq SPR9OFF(%rsp), %r9
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419 movq SPR10OFF(%rsp), %r10
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420 movq SPR11OFF(%rsp), %r11
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421 // rax already contains return value
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422 movdqa SPXMM0OFF(%rsp), %xmm0
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423 movdqa SPXMM1OFF(%rsp), %xmm1
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424 movdqa SPXMM2OFF(%rsp), %xmm2
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425 movdqa SPXMM3OFF(%rsp), %xmm3
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426 movdqa SPXMM4OFF(%rsp), %xmm4
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427 movdqa SPXMM5OFF(%rsp), %xmm5
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428 movdqa SPXMM6OFF(%rsp), %xmm6
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429 movdqa SPXMM7OFF(%rsp), %xmm7
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430
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431 movq %rbp, %rsp /
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432 popq %rbp /
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433 ret / return to caller
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434 .size elf_plt_trace, .-elf_plt_trace
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435 #endif
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436
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437 /*
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438 * We got here because a call to a function resolved to a procedure
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439 * linkage table entry. That entry did a JMPL to the first PLT entry, which
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440 * in turn did a call to elf_rtbndr.
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441 *
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442 * the code sequence that got us here was:
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443 *
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444 * .PLT0:
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445 * pushq GOT+8(%rip) #GOT[1]
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446 * jmp *GOT+16(%rip) #GOT[2]
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447 * nop
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448 * nop
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449 * nop
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450 * nop
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451 * ...
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452 * PLT entry for foo:
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453 * jmp *name1@GOTPCREL(%rip)
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454 * pushl $rel.plt.foo
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455 * jmp PLT0
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456 *
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457 * At entry, the stack looks like this:
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458 *
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459 * return address 16(%rsp)
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460 * $rel.plt.foo (plt index) 8(%rsp)
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461 * lmp 0(%rsp)
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462 *
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463 */
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464 #if defined(lint)
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465
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466 extern unsigned long elf_bndr(Rt_map *, unsigned long, caddr_t);
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467
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468 void
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469 elf_rtbndr(Rt_map * lmp, unsigned long reloc, caddr_t pc)
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470 {
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471 (void) elf_bndr(lmp, reloc, pc);
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472 }
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473
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474 #else
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475
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476 /*
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477 * The PLT code that landed us here placed 2 arguments on the stack as
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478 * arguments to elf_rtbndr.
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479 * Additionally the pc of caller is below these 2 args.
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480 * Our stack will look like this after we establish a stack frame with
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481 * push %rbp; movq %rsp, %rbp sequence:
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482 *
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483 * 8(%rbp) arg1 - *lmp
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484 * 16(%rbp), %rsi arg2 - reloc index
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485 * 24(%rbp), %rdx arg3 - pc of caller
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486 */
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487 #define LBPLMPOFF 8 /* arg1 - *lmp */
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488 #define LBPRELOCOFF 16 /* arg2 - reloc index */
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489 #define LBRPCOFF 24 /* arg3 - pc of caller */
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490
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491 /*
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492 * Possible arguments for the resolved function are in registers as per
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493 * the AMD64 ABI. We must save on the local stack all possible register
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494 * arguments before interposing functions to resolve the called function.
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495 * Possible arguments must be restored before invoking the resolved function.
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496 *
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497 * Local stack space storage for elf_rtbndr is allocated as follows:
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498 *
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499 * Saved regs:
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500 * %rax 8
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501 * %rdi 8
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502 * %rsi 8
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503 * %rdx 8
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504 * %rcx 8
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505 * %r8 8
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506 * %r9 8
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507 * %r10 8
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508 * =======
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509 * Subtotal: 64 (16byte aligned)
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510 *
685e2f65770b 6668050 First trip through PLT does not preserve args in xmm registers
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511 * Saved Media Regs (used to pass floating point args):
685e2f65770b 6668050 First trip through PLT does not preserve args in xmm registers
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diff changeset
512 * %xmm0 - %xmm7 16 * 8: 128
685e2f65770b 6668050 First trip through PLT does not preserve args in xmm registers
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513 * =======
685e2f65770b 6668050 First trip through PLT does not preserve args in xmm registers
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514 * Total: 192 (16byte aligned)
685e2f65770b 6668050 First trip through PLT does not preserve args in xmm registers
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515 *
685e2f65770b 6668050 First trip through PLT does not preserve args in xmm registers
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516 * So - will subtract the following to create enough space
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517 *
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518 * 0(%rsp) save %rax
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519 * 8(%rsp) save %rdi
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520 * 16(%rsp) save %rsi
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521 * 24(%rsp) save %rdx
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522 * 32(%rsp) save %rcx
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523 * 40(%rsp) save %r8
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524 * 48(%rsp) save %r9
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525 * 56(%rsp) save %r10
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526 * 64(%rsp) save %xmm0
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527 * 80(%rsp) save %xmm1
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528 * 96(%rsp) save %xmm2
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529 * 112(%rsp) save %xmm3
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530 * 128(%rsp) save %xmm4
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531 * 144(%rsp) save %xmm5
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532 * 160(%rsp) save %xmm6
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533 * 176(%rsp) save %xmm7
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534 *
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535 * Note: Some callers may use 8-byte stack alignment instead of the
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536 * ABI required 16-byte alignment. We use %rsp offsets to save/restore
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diff changeset
537 * registers because %rbp may not be 16-byte aligned. We guarantee %rsp
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538 * is 16-byte aligned in the function preamble.
6158
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539 */
685e2f65770b 6668050 First trip through PLT does not preserve args in xmm registers
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540 #define LS_SIZE $192 /* local stack space to save all possible arguments */
6186
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541 #define LSRAXOFF 0 /* for SSE register count */
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542 #define LSRDIOFF 8 /* arg 0 ... */
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543 #define LSRSIOFF 16
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544 #define LSRDXOFF 24
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545 #define LSRCXOFF 32
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546 #define LSR8OFF 40
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547 #define LSR9OFF 48
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548 #define LSR10OFF 56 /* ... arg 5 */
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549 #define LSXMM0OFF 64 /* SSE arg 0 ... */
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550 #define LSXMM1OFF 80
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551 #define LSXMM2OFF 96
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552 #define LSXMM3OFF 112
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553 #define LSXMM4OFF 128
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554 #define LSXMM5OFF 144
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555 #define LSXMM6OFF 160
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556 #define LSXMM7OFF 176 /* ... SSE arg 7 */
6158
685e2f65770b 6668050 First trip through PLT does not preserve args in xmm registers
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diff changeset
557
0
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558 .weak _elf_rtbndr
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559 _elf_rtbndr = elf_rtbndr
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560
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561 ENTRY(elf_rtbndr)
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562
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563 pushq %rbp
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564 movq %rsp, %rbp
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565
6186
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566 /*
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
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567 * Some libraries may (incorrectly) use non-ABI compliant 8-byte stack
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
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568 * alignment. Enforce ABI 16-byte stack alignment here.
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
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569 * The next andq instruction does this pseudo code:
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
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570 * If %rsp is 8 byte aligned then subtract 8 from %rsp.
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571 */
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572 andq $-16, %rsp /* enforce ABI 16-byte stack alignment */
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573
6158
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574 subq LS_SIZE, %rsp /* save all ABI defined argument registers */
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575
6186
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576 movq %rax, LSRAXOFF(%rsp) /* for SSE register count */
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
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577 movq %rdi, LSRDIOFF(%rsp) /* arg 0 .. */
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578 movq %rsi, LSRSIOFF(%rsp)
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579 movq %rdx, LSRDXOFF(%rsp)
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580 movq %rcx, LSRCXOFF(%rsp)
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581 movq %r8, LSR8OFF(%rsp)
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582 movq %r9, LSR9OFF(%rsp) /* .. arg 5 */
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583 movq %r10, LSR10OFF(%rsp) /* call chain reg */
6158
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584
6186
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585 movdqa %xmm0, LSXMM0OFF(%rsp) /* SSE arg 0 ... */
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586 movdqa %xmm1, LSXMM1OFF(%rsp)
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587 movdqa %xmm2, LSXMM2OFF(%rsp)
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588 movdqa %xmm3, LSXMM3OFF(%rsp)
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parents: 6158
diff changeset
589 movdqa %xmm4, LSXMM4OFF(%rsp)
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diff changeset
590 movdqa %xmm5, LSXMM5OFF(%rsp)
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diff changeset
591 movdqa %xmm6, LSXMM6OFF(%rsp)
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
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diff changeset
592 movdqa %xmm7, LSXMM7OFF(%rsp) /* ... SSE arg 7 */
0
68f95e015346 OpenSolaris Launch
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parents:
diff changeset
593
6158
685e2f65770b 6668050 First trip through PLT does not preserve args in xmm registers
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diff changeset
594 movq LBPLMPOFF(%rbp), %rdi /* arg1 - *lmp */
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diff changeset
595 movq LBPRELOCOFF(%rbp), %rsi /* arg2 - reloc index */
685e2f65770b 6668050 First trip through PLT does not preserve args in xmm registers
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diff changeset
596 movq LBRPCOFF(%rbp), %rdx /* arg3 - pc of caller */
685e2f65770b 6668050 First trip through PLT does not preserve args in xmm registers
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diff changeset
597 call elf_bndr@PLT /* call elf_rtbndr(lmp, relndx, pc) */
685e2f65770b 6668050 First trip through PLT does not preserve args in xmm registers
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diff changeset
598 movq %rax, LBPRELOCOFF(%rbp) /* store final destination */
0
68f95e015346 OpenSolaris Launch
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599
6158
685e2f65770b 6668050 First trip through PLT does not preserve args in xmm registers
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diff changeset
600 /* restore possible arguments before invoking resolved function */
6186
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diff changeset
601 movq LSRAXOFF(%rsp), %rax
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
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602 movq LSRDIOFF(%rsp), %rdi
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
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diff changeset
603 movq LSRSIOFF(%rsp), %rsi
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
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parents: 6158
diff changeset
604 movq LSRDXOFF(%rsp), %rdx
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
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diff changeset
605 movq LSRCXOFF(%rsp), %rcx
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
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606 movq LSR8OFF(%rsp), %r8
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
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diff changeset
607 movq LSR9OFF(%rsp), %r9
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
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diff changeset
608 movq LSR10OFF(%rsp), %r10
6158
685e2f65770b 6668050 First trip through PLT does not preserve args in xmm registers
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diff changeset
609
6186
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
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diff changeset
610 movdqa LSXMM0OFF(%rsp), %xmm0
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
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diff changeset
611 movdqa LSXMM1OFF(%rsp), %xmm1
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
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diff changeset
612 movdqa LSXMM2OFF(%rsp), %xmm2
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
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parents: 6158
diff changeset
613 movdqa LSXMM3OFF(%rsp), %xmm3
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
bholler
parents: 6158
diff changeset
614 movdqa LSXMM4OFF(%rsp), %xmm4
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
bholler
parents: 6158
diff changeset
615 movdqa LSXMM5OFF(%rsp), %xmm5
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
bholler
parents: 6158
diff changeset
616 movdqa LSXMM6OFF(%rsp), %xmm6
ae3aa141e3fa 6672544 elf_rtbndr must support non-ABI aligned stacks on amd64
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diff changeset
617 movdqa LSXMM7OFF(%rsp), %xmm7
0
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618
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619 movq %rbp, %rsp
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620 popq %rbp
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621
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622 addq $8, %rsp /* pop 1st plt-pushed args */
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623 /* the second arguement is used */
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624 /* for the 'return' address to our */
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diff changeset
625 /* final destination */
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626
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627 ret /* invoke resolved function */
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628 .size elf_rtbndr, .-elf_rtbndr
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diff changeset
629 #endif