From 97724ab7b9a79ea4de74086d3fcb1be3ff6d6450 Mon Sep 17 00:00:00 2001 From: Dominik Charousset Date: Mon, 11 Jun 2012 20:56:28 +0200 Subject: [PATCH] boost.context --- .gitignore | 1 - .../src/asm/fcontext_arm_aapcs_elf_gas.S | 98 +++++++ .../src/asm/fcontext_i386_sysv_elf_gas.S | 122 +++++++++ .../src/asm/fcontext_i386_sysv_macho_gas.S | 118 +++++++++ .../src/asm/fcontext_mips32_o32_elf_gas.S | 144 ++++++++++ .../src/asm/fcontext_ppc32_sysv_elf_gas.S | 222 ++++++++++++++++ .../src/asm/fcontext_ppc64_sysv_elf_gas.S | 250 ++++++++++++++++++ .../src/asm/fcontext_x86_64_sysv_elf_gas.S | 116 ++++++++ .../src/asm/fcontext_x86_64_sysv_macho_gas.s | 113 ++++++++ 9 files changed, 1183 insertions(+), 1 deletion(-) create mode 100644 third_party/boost_context/src/asm/fcontext_arm_aapcs_elf_gas.S create mode 100644 third_party/boost_context/src/asm/fcontext_i386_sysv_elf_gas.S create mode 100644 third_party/boost_context/src/asm/fcontext_i386_sysv_macho_gas.S create mode 100644 third_party/boost_context/src/asm/fcontext_mips32_o32_elf_gas.S create mode 100644 third_party/boost_context/src/asm/fcontext_ppc32_sysv_elf_gas.S create mode 100644 third_party/boost_context/src/asm/fcontext_ppc64_sysv_elf_gas.S create mode 100644 third_party/boost_context/src/asm/fcontext_x86_64_sysv_elf_gas.S create mode 100644 third_party/boost_context/src/asm/fcontext_x86_64_sysv_macho_gas.s diff --git a/.gitignore b/.gitignore index 99d3976634..f003972a5b 100644 --- a/.gitignore +++ b/.gitignore @@ -8,7 +8,6 @@ *.lo *.o *.png -*.s *.tmp .DS_Store .deps/ diff --git a/third_party/boost_context/src/asm/fcontext_arm_aapcs_elf_gas.S b/third_party/boost_context/src/asm/fcontext_arm_aapcs_elf_gas.S new file mode 100644 index 0000000000..0f1f8fb646 --- /dev/null +++ b/third_party/boost_context/src/asm/fcontext_arm_aapcs_elf_gas.S @@ -0,0 +1,98 @@ +/* + Copyright Oliver Kowalke 2009. + Distributed under the Boost Software License, Version 1.0. + (See accompanying file LICENSE_1_0.txt or copy at + http://www.boost.org/LICENSE_1_0.txt) +*/ + +/******************************************************************* + * * + * ------------------------------------------------------------- * + * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | * + * ------------------------------------------------------------- * + * | 0x0 | 0x4 | 0x8 | 0xc | 0x10| 0x14| 0x18| 0x1c| 0x20| 0x24| * + * ------------------------------------------------------------- * + * | v1 | v2 | v3 | v4 | v5 | v6 | v7 | v8 | sp | lr | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 10 | | * + * ------------------------------------------------------------- * + * | 0x28| | * + * ------------------------------------------------------------- * + * | pc | | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 11 | 12 | | * + * ------------------------------------------------------------- * + * | 0x2c| 0x30| | * + * ------------------------------------------------------------- * + * |sbase|slimit| | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | * + * ------------------------------------------------------------- * + * | 0x34| 0x38|0x3c| 0x40| 0x44| 0x48| 0x4c| 0x50| 0x54| 0x58 | * + * ------------------------------------------------------------- * + * | s16 | s17 | s18 | s19 | s20 | s21 | s22 | s23 | s24 | s25 | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 23 | 24 | 25 | 26 | 27 | 28 | | * + * ------------------------------------------------------------- * + * | 0x5c| 0x60| 0x64| 0x68| 0x6c| 0x70| | * + * ------------------------------------------------------------- * + * | s26 | s27 | s28 | s29 | s30 | s31 | | * + * ------------------------------------------------------------- * + * * + * *****************************************************************/ + +.text +.globl jump_fcontext +.align 2 +.type jump_fcontext,%function +jump_fcontext: + stmia a1, {v1-v8,sp-lr} @ save V1-V8,SP-LR + str lr, [a1,#40] @ save LR as PC +#if (defined(__VFP_FP__) && !defined(__SOFTFP__)) + cmp a4, #0 @ test if fpu env should be preserved + be 1f + + ldr a4, [a1,#52] + stmia a4, {s16-s31} @ save S16-S31 + + ldr a4, [a2,#52] + ldmia a4, {s16-s31} @ restore S16-S31 +1: +#endif + + mov a1, a3 @ use third arg as return value after jump + @ and as first arg in context function + ldmia a2, {v1-v8,sp-pc} @ restore v1-V8,SP-PC +.size jump_fcontext,.-jump_fcontext + +.text +.globl make_fcontext +.align 2 +.type make_fcontext,%function +make_fcontext: + str a1, [a1,#0] @ save the address of passed context + str a2, [a1,#40] @ save address of the context function + ldr a2, [a1,#44] @ load the stack base + + push {a1,lr} @ save pointer to fcontext_t + mov a1, a2 @ stack pointer as arg for align_stack + bl align_stack@PLT @ align stack + mov a2, a1 @ begin of aligned stack + pop {a1,lr} @ restore pointer to fcontext_t + + str a2, [a1,#32] @ save the aligned stack base + + adr a2, finish @ address of finish; called after context function returns + str a2, [a1,#36] + + mov a1, #0 + bx lr + +finish: + mov a1, #0 @ exit code is zero + bl _exit@PLT @ exit application +.size make_fcontext,.-make_fcontext diff --git a/third_party/boost_context/src/asm/fcontext_i386_sysv_elf_gas.S b/third_party/boost_context/src/asm/fcontext_i386_sysv_elf_gas.S new file mode 100644 index 0000000000..7c94ea068d --- /dev/null +++ b/third_party/boost_context/src/asm/fcontext_i386_sysv_elf_gas.S @@ -0,0 +1,122 @@ +/* + Copyright Oliver Kowalke 2009. + Distributed under the Boost Software License, Version 1.0. + (See accompanying file LICENSE_1_0.txt or copy at + http://www.boost.org/LICENSE_1_0.txt) +*/ + +/******************************************************************** + * * + * -------------------------------------------------------------- * + * | 0 | 1 | 2 | 3 | 4 | 5 | * + * -------------------------------------------------------------- * + * | 0x0 | 0x4 | 0x8 | 0xc | 0x10 | 0x14 | * + * -------------------------------------------------------------- * + * | EDI | ESI | EBX | EBP | ESP | EIP | * + * -------------------------------------------------------------- * + * -------------------------------------------------------------- * + * | 6 | 7 | | * + * -------------------------------------------------------------- * + * | 0x18 | 0x1c | | * + * -------------------------------------------------------------- * + * | sbase | slimit | | * + * -------------------------------------------------------------- * + * -------------------------------------------------------------- * + * | 8 | 9 | | * + * -------------------------------------------------------------- * + * | 0x20 | 0x24 | | * + * -------------------------------------------------------------- * + * | fc_mxcsr|fc_x87_cw| | * + * -------------------------------------------------------------- * + * * + * *****************************************************************/ + +.text +.globl jump_fcontext +.align 2 +.type jump_fcontext,@function +jump_fcontext: + movl 0x4(%esp), %ecx /* load address of the first fcontext_t arg */ + movl %edi, (%ecx) /* save EDI */ + movl %esi, 0x4(%ecx) /* save ESI */ + movl %ebx, 0x8(%ecx) /* save EBX */ + movl %ebp, 0xc(%ecx) /* save EBP */ + + leal 0x4(%esp), %eax /* exclude the return address */ + movl %eax, 0x10(%ecx) /* save as stack pointer */ + movl (%esp), %eax /* load return address */ + movl %eax, 0x14(%ecx) /* save return address */ + + movl 0x8(%esp), %edx /* load address of the second fcontext_t arg */ + movl (%edx), %edi /* restore EDI */ + movl 0x4(%edx), %esi /* restore ESI */ + movl 0x8(%edx), %ebx /* restore EBX */ + movl 0xc(%edx), %ebp /* restore EBP */ + + movl 0x10(%esp), %eax /* check if fpu enve preserving was requested */ + test %eax, %eax + je 1f + + stmxcsr 0x20(%ecx) /* save MMX control and status word */ + fnstcw 0x24(%ecx) /* save x87 control word */ + ldmxcsr 0x20(%edx) /* restore MMX control and status word */ + fldcw 0x24(%edx) /* restore x87 control word */ +1: + movl 0xc(%esp), %eax /* use third arg as return value after jump */ + + movl 0x10(%edx), %esp /* restore ESP */ + movl %eax, 0x4(%esp) /* use third arg as first arg in context function */ + movl 0x14(%edx), %edx /* fetch the address to return to */ + + jmp *%edx /* indirect jump to context */ +.size jump_fcontext,.-jump_fcontext + +.text +.globl make_fcontext +.align 2 +.type make_fcontext,@function +make_fcontext: + movl 0x4(%esp), %eax /* load address of the fcontext_t */ + movl %eax, (%eax) /* save the address of current context */ + movl 0x8(%esp), %ecx /* load the address of the context function */ + movl %ecx, 0x14(%eax) /* save the address of the context function */ + movl 0x18(%eax), %edx /* load the stack base */ + + pushl %eax /* save pointer to fcontext_t */ + pushl %ebx /* save EBX */ + pushl %edx /* stack pointer as arg for align_stack */ + call 1f +1: popl %ebx /* address of label 1 */ + addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx /* compute address of GOT and store it in EBX */ + call align_stack@PLT /* align stack */ + movl %eax, %edx /* begin of aligned stack */ + popl %eax /* remove arg for align_stack */ + popl %ebx /* restore EBX */ + popl %eax /* restore pointer to fcontext_t */ + + leal -0x14(%edx), %edx /* reserve space for the last frame on stack, (ESP + 4) % 16 == 0 */ + movl %edx, 0x10(%eax) /* save the aligned stack base */ + + stmxcsr 0x20(%eax) /* save MMX control and status word */ + fnstcw 0x24(%eax) /* save x87 control word */ + + call 2f +2: popl %ecx /* address of label 2 */ + addl $finish-2b, %ecx /* helper code executed after context function returns */ + movl %ecx, (%edx) + + xorl %eax, %eax + ret + +finish: + leal -0xc(%esp), %esp + + call 3f +3: popl %ebx /* address of label 3 */ + addl $_GLOBAL_OFFSET_TABLE_+[.-3b], %ebx /* compute address of GOT and store it in EBX */ + + xorl %eax, %eax + pushl %eax /* exit code is zero */ + call _exit@PLT /* exit application */ + hlt +.size make_fcontext,.-make_fcontext diff --git a/third_party/boost_context/src/asm/fcontext_i386_sysv_macho_gas.S b/third_party/boost_context/src/asm/fcontext_i386_sysv_macho_gas.S new file mode 100644 index 0000000000..a28c87576a --- /dev/null +++ b/third_party/boost_context/src/asm/fcontext_i386_sysv_macho_gas.S @@ -0,0 +1,118 @@ +/* + Copyright Oliver Kowalke 2009. + Distributed under the Boost Software License, Version 1.0. + (See accompanying file LICENSE_1_0.txt or copy at + http://www.boost.org/LICENSE_1_0.txt) +*/ + +/******************************************************************** + * * + * -------------------------------------------------------------- * + * | 0 | 1 | 2 | 3 | 4 | 5 | * + * -------------------------------------------------------------- * + * | 0x0 | 0x4 | 0x8 | 0xc | 0x10 | 0x14 | * + * -------------------------------------------------------------- * + * | EDI | ESI | EBX | EBP | ESP | EIP | * + * -------------------------------------------------------------- * + * -------------------------------------------------------------- * + * | 6 | 7 | | * + * -------------------------------------------------------------- * + * | 0x18 | 0x1c | | * + * -------------------------------------------------------------- * + * | sbase | slimit | | * + * -------------------------------------------------------------- * + * -------------------------------------------------------------- * + * | 8 | 9 | | * + * -------------------------------------------------------------- * + * | 0x20 | 0x24 | | * + * -------------------------------------------------------------- * + * | fc_mxcsr|fc_x87_cw| | * + * -------------------------------------------------------------- * + * * + * *****************************************************************/ + +.text +.globl _jump_fcontext +.align 2 +_jump_fcontext: + movl 0x4(%esp), %ecx /* load address of the first fcontext_t arg */ + movl %edi, (%ecx) /* save EDI */ + movl %esi, 0x4(%ecx) /* save ESI */ + movl %ebx, 0x8(%ecx) /* save EBX */ + movl %ebp, 0xc(%ecx) /* save EBP */ + + leal 0x4(%esp), %eax /* exclude the return address */ + movl %eax, 0x10(%ecx) /* save as stack pointer */ + movl (%esp), %eax /* load return address */ + movl %eax, 0x14(%ecx) /* save return address */ + + movl 0x8(%esp), %edx /* load address of the second fcontext_t arg */ + movl (%edx), %edi /* restore EDI */ + movl 0x4(%edx), %esi /* restore ESI */ + movl 0x8(%edx), %ebx /* restore EBX */ + movl 0xc(%edx), %ebp /* restore EBP */ + + movl 0x10(%esp), %eax /* check if fpu enve preserving was requested */ + test %eax, %eax + je 1f + + stmxcsr 0x20(%ecx) /* save MMX control and status word */ + fnstcw 0x24(%ecx) /* save x87 control word */ + ldmxcsr 0x20(%edx) /* restore MMX control and status word */ + fldcw 0x24(%edx) /* restore x87 control word */ +1: + movl 0xc(%esp), %eax /* use third arg as return value after jump */ + + movl 0x10(%edx), %esp /* restore ESP */ + movl %eax, 0x4(%esp) /* use third arg as first arg in context function */ + movl 0x14(%edx), %edx /* fetch the address to return to */ + + jmp *%edx /* indirect jump to context */ + +.text +.globl _make_fcontext +.align 2 +_make_fcontext: + movl 0x4(%esp), %eax /* load address of the fcontext_t */ + movl %eax, (%eax) /* save the address of current context */ + movl 0x8(%esp), %ecx /* load the address of the context function */ + movl %ecx, 0x14(%eax) /* save the address of the context function */ + movl 0x18(%eax), %edx /* load the stack base */ + + pushl %eax /* save pointer to fcontext_t */ + pushl %ebx /* save EBX */ + pushl %edx /* stack pointer as arg for align_stack */ + call 1f +1: popl %ebx /* address of label 1 */ + addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx /* compute address of GOT and store it in EBX */ + call align_stack@PLT /* align stack */ + movl %eax, %edx /* begin of aligned stack */ + popl %eax /* remove arg for align_stack */ + popl %ebx /* restore EBX */ + popl %eax /* restore pointer to fcontext_t */ + + leal -0x14(%edx), %edx /* reserve space for the last frame on stack, (ESP + 4) % 16 == 0 */ + movl %edx, 0x10(%eax) /* save the aligned stack base */ + + stmxcsr 0x20(%eax) /* save MMX control and status word */ + fnstcw 0x24(%eax) /* save x87 control word */ + + call 2f +2: popl %ecx /* address of label 2 */ + addl $finish-2b, %ecx /* helper code executed after context function returns */ + movl %ecx, (%edx) + + xorl %eax, %eax + ret + +finish: + leal -0xc(%esp), %esp + + call 3f +3: popl %ebx /* address of label 3 */ + addl $_GLOBAL_OFFSET_TABLE_+[.-3b], %ebx /* compute address of GOT and store it in EBX */ + + xorl %eax, %eax + pushl %eax /* exit code is zero */ + call _exit@PLT /* exit application */ + hlt diff --git a/third_party/boost_context/src/asm/fcontext_mips32_o32_elf_gas.S b/third_party/boost_context/src/asm/fcontext_mips32_o32_elf_gas.S new file mode 100644 index 0000000000..be86f185ec --- /dev/null +++ b/third_party/boost_context/src/asm/fcontext_mips32_o32_elf_gas.S @@ -0,0 +1,144 @@ +/* + Copyright Oliver Kowalke 2009. + Distributed under the Boost Software License, Version 1.0. + (See accompanying file LICENSE_1_0.txt or copy at + http://www.boost.org/LICENSE_1_0.txt) +*/ + +/******************************************************************* + * * + * ------------------------------------------------------------- * + * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | * + * ------------------------------------------------------------- * + * | 0 | 8 | 16 | 24 | 32 | 40 | 48 | 56 | 64 | 72 | * + * ------------------------------------------------------------- * + * | S0 | S1 | S2 | S3 | S4 | S5 | S6 | S7 | GP | SP | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 10 | 11 | 12 | | * + * ------------------------------------------------------------- * + * | 80 | 88 | 96 | | * + * ------------------------------------------------------------- * + * | S8 | RA | PC | | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 13 | 14 | | * + * ------------------------------------------------------------- * + * | 104 | 112 | | * + * ------------------------------------------------------------- * + * |sbase|slimt| | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 15 | 16 | 17 | 18 | 19 | 20 | | * + * ------------------------------------------------------------- * + * | 120 | 128 | 136 | 144 | 152 | 160 | | * + * ------------------------------------------------------------- * + * | F20 | F22 | F24 | F26 | F28 | F30 | | * + * ------------------------------------------------------------- * + * * + * *****************************************************************/ + +.text +.globl jump_fcontext +.align 2 +.type jump_fcontext,@function +.ent jump_fcontext +jump_fcontext: + sw $s0, ($a0) # save S0 + sw $s1, 8($a0) # save S1 + sw $s2, 16($a0) # save S2 + sw $s3, 24($a0) # save S3 + sw $s4, 32($a0) # save S4 + sw $s5, 40($a0) # save S5 + sw $s6, 48($a0) # save S6 + sw $s7, 56($a0) # save S7 + sw $gp, 64($a0) # save GP + sw $sp, 72($a0) # save SP + sw $s8, 80($a0) # save S8 + sw $ra, 88($a0) # save RA + sw $ra, 96($a0) # save RA as PC + +#if defined(__mips_hard_float) + beqz $a3, 1f # test if fpu env should be preserved + s.d $f20, 120($a0) # save F20 + s.d $f22, 128($a0) # save F22 + s.d $f24, 136($a0) # save F24 + s.d $f26, 144($a0) # save F26 + s.d $f28, 152($a0) # save F28 + s.d $f30, 160($a0) # save F30 + + l.d $f20, 120($a1) # restore F20 + l.d $f22, 128($a1) # restore F22 + l.d $f24, 136($a1) # restore F24 + l.d $f26, 144($a1) # restore F26 + l.d $f28, 152($a1) # restore F28 + l.d $f30, 160($a1) # restore F30 +1: +#endif + + lw $s0, ($a1) # restore S0 + lw $s1, 8($a1) # restore S1 + lw $s2, 16($a1) # restore S2 + lw $s3, 24($a1) # restore S3 + lw $s4, 32($a1) # restore S4 + lw $s5, 40($a1) # restore S5 + lw $s6, 48($a1) # restore S6 + lw $s7, 56($a1) # restore S7 + lw $gp, 64($a1) # restore GP + lw $sp, 72($a1) # restore SP + lw $s8, 80($a1) # restore S8 + lw $ra, 88($a1) # restore RA + move $a0, $s2 # restore void pointer as argument + + move $v0, $a2 # use third arg as return value after jump + move $a0, $a2 # use third arg as first arg in context function + + lw $t9, 96($a1) # load PC + jr $t9 # jump to context +.end jump_fcontext +.size jump_fcontext, .-jump_fcontext + +.text +.globl make_fcontext +.align 2 +.type make_fcontext,@function +.ent make_fcontext +make_fcontext: +#ifdef __PIC__ +.set noreorder +.cpload $t9 +.set reorder +#endif + sw $a0, ($a0) # save the current context + sw $gp, 24($a0) # save global pointer + sw $a1, 96($a0) # save the address of the context function + lw $t0, 104($a0) # load the stack base + + sub $sp, $sp, 28 + sw $ra, 24($sp) + sw $a0, 20($sp) + move $a0, $t0 # stack pointer as arg for align_stack + lw $t9, %call16(align_stack)($gp) # align stack + jalr $t9 + nop + move $t0, $v0 # begin of aligned stack + lw $ra, 24($sp) + lw $a0, 20($sp) + addi $sp, $sp, 28 + + sub $t0, $t0, 16 # reserve 16 byte of argument space + sw $t0, 72($a0) # save the algned stack base + + la $t9, finish # helper code executed after context function returns + sw $t9, 88($a0) + + move $v0, $zero + jr $ra + +finish: + move $gp, $s3 # restore GP (global pointer) + move $a0, $zero # exit code is zero + lw $t9, %call16(_exit)($gp) # exit application + jalr $t9 +.end make_fcontext +.size make_fcontext, .-make_fcontext diff --git a/third_party/boost_context/src/asm/fcontext_ppc32_sysv_elf_gas.S b/third_party/boost_context/src/asm/fcontext_ppc32_sysv_elf_gas.S new file mode 100644 index 0000000000..69b6ed90b5 --- /dev/null +++ b/third_party/boost_context/src/asm/fcontext_ppc32_sysv_elf_gas.S @@ -0,0 +1,222 @@ +/* + Copyright Oliver Kowalke 2009. + Distributed under the Boost Software License, Version 1.0. + (See accompanying file LICENSE_1_0.txt or copy at + http://www.boost.org/LICENSE_1_0.txt) +*/ + +/******************************************************************* + * * + * ------------------------------------------------------------- * + * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | * + * ------------------------------------------------------------- * + * | 0 | 4 | 8 | 12 | 16 | 20 | 24 | 28 | 32 | 36 | * + * ------------------------------------------------------------- * + * | R13 | R14 | R15 | R16 | R17 | R18 | R19 | R20 | R21 | R22 | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | * + * ------------------------------------------------------------- * + * | 40 | 44 | 48 | 52 | 56 | 60 | 64 | 68 | 72 | 76 | * + * ------------------------------------------------------------- * + * | R23 | R24 | R25 | R26 | R27 | R28 | R29 | R30 | R31 | SP | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 20 | 21 | 22 | | * + * ------------------------------------------------------------- * + * | 80 | 84 | 88 | | * + * ------------------------------------------------------------- * + * | CR | LR | PC | | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 23 | 24 | | * + * ------------------------------------------------------------- * + * | 92 | 96 | | * + * ------------------------------------------------------------- * + * |sbase|slimt| | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | * + * ------------------------------------------------------------- * + * | 100 | 104 | 108 | 112 | 116 | 120 | 124 | 128 | 132 | 136 | * + * ------------------------------------------------------------- * + * | F14 | F15 | F16 | F17 | F18 | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | * + * ------------------------------------------------------------- * + * | 140 | 144 | 148 | 152 | 156 | 160 | 164 | 168 | 172 | 176 | * + * ------------------------------------------------------------- * + * | F19 | F20 | F21 | F22 | F23 | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | * + * ------------------------------------------------------------- * + * | 180 | 184 | 188 | 192 | 196 | 200 | 204 | 208 | 212 | 216 | * + * ------------------------------------------------------------- * + * | F24 | F25 | F26 | F27 | F28 | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | | * + * ------------------------------------------------------------- * + * | 220 | 224 | 228 | 232 | 236 | 240 | 244 | 248 | | * + * ------------------------------------------------------------- * + * | F29 | F30 | F31 | fpscr | | * + * ------------------------------------------------------------- * + * * + * *****************************************************************/ + +.text +.globl jump_fcontext +.align 2 +.type jump_fcontext,@function +jump_fcontext: + stw %r13, 0(%r3) # save R13 + stw %r14, 4(%r3) # save R14 + stw %r15, 8(%r3) # save R15 + stw %r16, 12(%r3) # save R16 + stw %r17, 16(%r3) # save R17 + stw %r18, 20(%r3) # save R18 + stw %r19, 24(%r3) # save R19 + stw %r20, 28(%r3) # save R20 + stw %r21, 32(%r3) # save R21 + stw %r22, 36(%r3) # save R22 + stw %r23, 40(%r3) # save R23 + stw %r24, 44(%r3) # save R24 + stw %r25, 48(%r3) # save R25 + stw %r26, 52(%r3) # save R26 + stw %r27, 56(%r3) # save R27 + stw %r28, 60(%r3) # save R28 + stw %r29, 64(%r3) # save R29 + stw %r30, 68(%r3) # save R30 + stw %r31, 72(%r3) # save R31 + stw %r1, 76(%r3) # save SP + + mfcr %r0 # load CR + stw %r0, 80(%r3) # save CR + mflr %r0 # load LR + stw %r0, 84(%r3) # save LR + stw %r0, 88(%r3) # save LR as PC + + cmpwi cr7, %r6, 0 # test if fpu env should be preserved + beq cr7, 1f + + stfd %f14, 100(%r3) # save F14 + stfd %f15, 108(%r3) # save F15 + stfd %f16, 116(%r3) # save F16 + stfd %f17, 124(%r3) # save F17 + stfd %f18, 132(%r3) # save F18 + stfd %f19, 140(%r3) # save F19 + stfd %f20, 148(%r3) # save F20 + stfd %f21, 156(%r3) # save F21 + stfd %f22, 164(%r3) # save F22 + stfd %f23, 172(%r3) # save F23 + stfd %f24, 180(%r3) # save F24 + stfd %f25, 188(%r3) # save F25 + stfd %f26, 196(%r3) # save F26 + stfd %f27, 204(%r3) # save F27 + stfd %f28, 212(%r3) # save F28 + stfd %f29, 220(%r3) # save F29 + stfd %f30, 228(%r3) # save F30 + stfd %f31, 236(%r3) # save F31 + mffs %f0 # load FPSCR + stfd %f0, 244(%r3) # save FPSCR + + lfd %f14, 100(%r4) # restore F14 + lfd %f15, 108(%r4) # restore F15 + lfd %f16, 116(%r4) # restore F16 + lfd %f17, 124(%r4) # restore F17 + lfd %f18, 132(%r4) # restore F18 + lfd %f19, 140(%r4) # restore F19 + lfd %f20, 148(%r4) # restore F20 + lfd %f21, 156(%r4) # restore F21 + lfd %f22, 164(%r4) # restore F22 + lfd %f23, 172(%r4) # restore F23 + lfd %f24, 180(%r4) # restore F24 + lfd %f25, 188(%r4) # restore F25 + lfd %f26, 196(%r4) # restore F26 + lfd %f27, 204(%r4) # restore F27 + lfd %f28, 212(%r4) # restore F28 + lfd %f29, 220(%r4) # restore F29 + lfd %f30, 228(%r4) # restore F30 + lfd %f31, 236(%r4) # restore F31 + lfd %f0, 244(%r4) # load FPSCR + mtfsf 0xff, %f0 # restore FPSCR +1: + + lwz %r13, 0(%r4) # restore R13 + lwz %r14, 4(%r4) # restore R14 + lwz %r15, 8(%r4) # restore R15 + lwz %r16, 12(%r4) # restore R16 + lwz %r17, 16(%r4) # restore R17 + lwz %r18, 20(%r4) # restore R18 + lwz %r19, 24(%r4) # restore R19 + lwz %r20, 28(%r4) # restore R20 + lwz %r21, 32(%r4) # restore R21 + lwz %r22, 36(%r4) # restore R22 + lwz %r23, 40(%r4) # restore R23 + lwz %r24, 44(%r4) # restore R24 + lwz %r25, 48(%r4) # restore R25 + lwz %r26, 52(%r4) # restore R26 + lwz %r27, 56(%r4) # restore R27 + lwz %r28, 60(%r4) # restore R28 + lwz %r29, 64(%r4) # restore R29 + lwz %r30, 68(%r4) # restore R30 + lwz %r31, 72(%r4) # restore R31 + lwz %r1, 76(%r4) # restore SP + + lwz %r0, 80(%r4) # load CR + mtcr %r0 # restore CR + lwz %r0, 84(%r4) # load LR + mtlr %r0 # restore LR + + mr. %r3, %r5 # use third arg as return value after jump + # and as first arg in context function + + lwz %r0, 88(%r4) # load PC + mtctr %r0 # restore CTR + + bctr # jump to context +.size jump_fcontext, .-jump_fcontext + +.text +.globl make_fcontext +.align 2 +.type make_fcontext,@function +make_fcontext: + stw %r3, 0(%r3) # save the current context + stw %r4, 88(%r3) # save the address of the context function + lwz %r0, 92(%r3) # load the stack base + + li %r4, 28 + subf %r1, %r4, %r1 # reserve space on stack + stw %r3, 24(%r1) # store pointer to fcontext_t on stack + mflr %r4 # load LR + stw %r4, 20(%r1) # store LR on stack + mr. %r3, %r0 # context stack as arg to align_stack + bl align_stack@plt # call align_stack + mr. %r0, %r3 # load result into R0 + lwz %r4, 20(%r1) # pop LR from stack + mtlr %r4 # restore LR + lwz %r3, 24(%r1) # pop pointer to fcontext_t from stack + addi %r1, %r1, 28 # release space on stack + + li %r4, 32 + subf %r0, %r4, %r0 # 32 bytes on stack for parameter area(== 8 registers) + stw %r0, 76(%r3) # save the aligned stack base + + mflr %r0 # load LR + bl 1f # jump to label 1 +1: + mflr %r4 # load LR + addi %r4, %r4, finish - 1b # address of finish; called after context function returns + mtlr %r0 # restore LR + stw %r4, 84(%r3) + + li %r3, 0 + blr + +finish: + li %r3, 0 # exit code is zero + bl _exit@plt # exit application +.size make_fcontext, .-make_fcontext diff --git a/third_party/boost_context/src/asm/fcontext_ppc64_sysv_elf_gas.S b/third_party/boost_context/src/asm/fcontext_ppc64_sysv_elf_gas.S new file mode 100644 index 0000000000..0fcb387355 --- /dev/null +++ b/third_party/boost_context/src/asm/fcontext_ppc64_sysv_elf_gas.S @@ -0,0 +1,250 @@ +/* + Copyright Oliver Kowalke 2009. + Distributed under the Boost Software License, Version 1.0. + (See accompanying file LICENSE_1_0.txt or copy at + http://www.boost.org/LICENSE_1_0.txt) +*/ + +/******************************************************************* + * * + * ------------------------------------------------------------- * + * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | * + * ------------------------------------------------------------- * + * | 0 | 4 | 8 | 12 | 16 | 20 | 24 | 28 | 32 | 36 | * + * ------------------------------------------------------------- * + * | R13 | R14 | R15 | R16 | R17 | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | * + * ------------------------------------------------------------- * + * | 40 | 44 | 48 | 52 | 56 | 60 | 64 | 68 | 72 | 76 | * + * ------------------------------------------------------------- * + * | R18 | R19 | R20 | R21 | R22 | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | * + * ------------------------------------------------------------- * + * | 80 | 84 | 88 | 92 | 96 | 100 | 104 | 108 | 112 | 116 | * + * ------------------------------------------------------------- * + * | R23 | R24 | R25 | R26 | R27 | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | * + * ------------------------------------------------------------- * + * | 120 | 124 | 128 | 132 | 136 | 140 | 144 | 148 | 152 | 156 | * + * ------------------------------------------------------------- * + * | R28 | R29 | R30 | R31 | SP | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 40 | 41 | 42 | 43 | 44 | 45 | | * + * ------------------------------------------------------------- * + * | 160 | 164 | 168 | 172 | 176 | 180 | | * + * ------------------------------------------------------------- * + * | CR | LR | PC | | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 46 | 47 | 48 | 49 | | * + * ------------------------------------------------------------- * + * | 184 | 188 | 192 | 196 | | * + * ------------------------------------------------------------- * + * | sbase | slimt | | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | * + * ------------------------------------------------------------- * + * | 200 | 204 | 208 | 212 | 216 | 220 | 224 | 228 | 232 | 236 | * + * ------------------------------------------------------------- * + * | F14 | F15 | F16 | F17 | F18 | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | * + * ------------------------------------------------------------- * + * | 240 | 244 | 248 | 252 | 256 | 260 | 264 | 268 | 272 | 276 | * + * ------------------------------------------------------------- * + * | F19 | F20 | F21 | F22 | F23 | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | * + * ------------------------------------------------------------- * + * | 280 | 284 | 288 | 292 | 296 | 300 | 304 | 308 | 312 | 316 | * + * ------------------------------------------------------------- * + * | F24 | F25 | F26 | F27 | F28 | * + * ------------------------------------------------------------- * + * ------------------------------------------------------------- * + * | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | | * + * ------------------------------------------------------------- * + * | 320 | 324 | 328 | 332 | 336 | 340 | 344 | 348 | | * + * ------------------------------------------------------------- * + * | F29 | F30 | F31 | fpscr | | * + * ------------------------------------------------------------- * + * * + * *****************************************************************/ + +.section ".text" +.align 2 +.globl jump_fcontext +.section ".opd","aw" +.align 3 +jump_fcontext: +.quad .jump_fcontext,.TOC.@tocbase,0 +.previous +.size jump_fcontext,24 +.type .jump_fcontext,@function +.globl .jump_fcontext +.jump_fcontext: + std %r13, 0(%r3) # save R13 + std %r14, 8(%r3) # save R14 + std %r15, 16(%r3) # save R15 + std %r16, 24(%r3) # save R16 + std %r17, 32(%r3) # save R17 + std %r18, 40(%r3) # save R18 + std %r19, 48(%r3) # save R19 + std %r20, 56(%r3) # save R20 + std %r21, 64(%r3) # save R21 + std %r22, 72(%r3) # save R22 + std %r23, 80(%r3) # save R23 + std %r24, 88(%r3) # save R24 + std %r25, 96(%r3) # save R25 + std %r26, 104(%r3) # save R26 + std %r27, 112(%r3) # save R27 + std %r28, 120(%r3) # save R28 + std %r29, 128(%r3) # save R29 + std %r30, 136(%r3) # save R30 + std %r31, 144(%r3) # save R31 + std %r1, 152(%r3) # save SP + + mfcr %r0 # load CR + std %r0, 160(%r3) # save CR + mflr %r0 # load LR + std %r0, 168(%r3) # save LR + std %r0, 176(%r3) # save LR as PC + + cmpwi cr7, %r6, 0 # test if fpu env should be preserved + beq cr7, 1f + + stfd %f14, 200(%r3) # save F14 + stfd %f15, 208(%r3) # save F15 + stfd %f16, 216(%r3) # save F16 + stfd %f17, 224(%r3) # save F17 + stfd %f18, 232(%r3) # save F18 + stfd %f19, 240(%r3) # save F19 + stfd %f20, 248(%r3) # save F20 + stfd %f21, 256(%r3) # save F21 + stfd %f22, 264(%r3) # save F22 + stfd %f23, 272(%r3) # save F23 + stfd %f24, 280(%r3) # save F24 + stfd %f25, 288(%r3) # save F25 + stfd %f26, 296(%r3) # save F26 + stfd %f27, 304(%r3) # save F27 + stfd %f28, 312(%r3) # save F28 + stfd %f29, 320(%r3) # save F29 + stfd %f30, 328(%r3) # save F30 + stfd %f31, 336(%r3) # save F31 + mffs %f0 # load FPSCR + stfd %f0, 344(%r3) # save FPSCR + + lfd %f14, 200(%r4) # restore F14 + lfd %f15, 208(%r4) # restore F15 + lfd %f16, 216(%r4) # restore F16 + lfd %f17, 224(%r4) # restore F17 + lfd %f18, 232(%r4) # restore F18 + lfd %f19, 240(%r4) # restore F19 + lfd %f20, 248(%r4) # restore F20 + lfd %f21, 256(%r4) # restore F21 + lfd %f22, 264(%r4) # restore F22 + lfd %f23, 272(%r4) # restore F23 + lfd %f24, 280(%r4) # restore F24 + lfd %f25, 288(%r4) # restore F25 + lfd %f26, 296(%r4) # restore F26 + lfd %f27, 304(%r4) # restore F27 + lfd %f28, 312(%r4) # restore F28 + lfd %f29, 320(%r4) # restore F29 + lfd %f30, 328(%r4) # restore F30 + lfd %f31, 336(%r4) # restore F31 + lfd %f0, 344(%r4) # load FPSCR + mtfsf 0xff, %f0 # restore FPSCR +1: + + ld %r13, 0(%r4) # restore R13 + ld %r14, 8(%r4) # restore R14 + ld %r15, 16(%r4) # restore R15 + ld %r16, 24(%r4) # restore R16 + ld %r17, 32(%r4) # restore R17 + ld %r18, 40(%r4) # restore R18 + ld %r19, 48(%r4) # restore R19 + ld %r20, 56(%r4) # restore R20 + ld %r21, 64(%r4) # restore R21 + ld %r22, 72(%r4) # restore R22 + ld %r23, 80(%r4) # restore R23 + ld %r24, 88(%r4) # restore R24 + ld %r25, 96(%r4) # restore R25 + ld %r26, 104(%r4) # restore R26 + ld %r27, 112(%r4) # restore R27 + ld %r28, 120(%r4) # restore R28 + ld %r29, 128(%r4) # restore R29 + ld %r30, 136(%r4) # restore r30 + ld %r31, 144(%r4) # restore r31 + ld %r1, 152(%r4) # restore SP + + ld %r0, 160(%r4) # load CR + mtcr %r0 # restore CR + ld %r0, 168(%r4) # load LR + mtlr %r0 # restore LR + + mr. %r3, %r5 # use third arg as return value after jump + # and as first arg in context function + + ld %r0, 176(%r4) # load PC + mtctr %r0 # restore CTR + + bctr # jump to context +.size .jump_fcontext, .-.jump_fcontext + +.section ".text" +.align 2 +.globl make_fcontext +.section ".opd","aw" +.align 3 +make_fcontext: +.quad .make_fcontext,.TOC.@tocbase,0 +.previous +.size make_fcontext,24 +.type .make_fcontext,@function +.globl .make_fcontext +.make_fcontext: + std %r3, 0(%r3) # save the current context + std %r4, 176(%r3) # save the address of the function supposed to be run + ld %r0, 184(%r3) # load the stack base + + li %r4, 56 + subf %r1, %r4, %r1 # reserve space on stack + stw %r3, 48(%r1) # store pointer to fcontext_t on stack + mflr %r4 # load LR + stw %r4, 40(%r1) # store LR on stack + mr. %r3, %r0 # context stack as arg to align_stack + bl align_stack@plt # call align_stack + mr. %r0, %r3 # load result into R0 + lwz %r4, 40(%r1) # pop LR from stack + mtlr %r4 # restore LR + lwz %r3, 48(%r1) # pop pointer to fcontext_t from stack + addi %r1, %r1, 56 # release space on stack + + li %r4, 64 + subf %r0, %r4, %r0 # 64 bytes on stack for parameter area (== 8 registers) + std %r0, 152(%r3) # save the stack base + + mflr %r0 # load LR + bl 1f # jump to label 1 +1: + mflr %r4 # load LR + addi %r4, %r4, finish - 1b # calulate absolute address of finish + mtlr %r0 # restore LR + std %r4, 168(%r3) # save address of finish + + li %r3, 0 # set return value to zero + blr + +finish: + li %r3, 0 # set return value to zero + bl _exit@plt # exit application +.size .make_fcontext, .-.make_fcontext diff --git a/third_party/boost_context/src/asm/fcontext_x86_64_sysv_elf_gas.S b/third_party/boost_context/src/asm/fcontext_x86_64_sysv_elf_gas.S new file mode 100644 index 0000000000..ad2d42b46c --- /dev/null +++ b/third_party/boost_context/src/asm/fcontext_x86_64_sysv_elf_gas.S @@ -0,0 +1,116 @@ +/* + Copyright Oliver Kowalke 2009. + Distributed under the Boost Software License, Version 1.0. + (See accompanying file LICENSE_1_0.txt or copy at + http://www.boost.org/LICENSE_1_0.txt) +*/ + +/**************************************************************************************** + * * + * ---------------------------------------------------------------------------------- * + * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | * + * ---------------------------------------------------------------------------------- * + * | 0x0 | 0x4 | 0x8 | 0xc | 0x10 | 0x14 | 0x18 | 0x1c | * + * ---------------------------------------------------------------------------------- * + * | RBX | R12 | R13 | R14 | * + * ---------------------------------------------------------------------------------- * + * ---------------------------------------------------------------------------------- * + * | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | * + * ---------------------------------------------------------------------------------- * + * | 0x20 | 0x24 | 0x28 | 0x2c | 0x30 | 0x34 | 0x38 | 0x3c | * + * ---------------------------------------------------------------------------------- * + * | R15 | RBP | RSP | RIP | * + * ---------------------------------------------------------------------------------- * + * ---------------------------------------------------------------------------------- * + * | 16 | 17 | 18 | 19 | | * + * ---------------------------------------------------------------------------------- * + * | 0x40 | 0x44 | 0x48 | 0x4c | | * + * ---------------------------------------------------------------------------------- * + * | sbase | slimit | | * + * ---------------------------------------------------------------------------------- * + * ---------------------------------------------------------------------------------- * + * | 20 | 21 | | * + * ---------------------------------------------------------------------------------- * + * | 0x50 | 0x54 | | * + * ---------------------------------------------------------------------------------- * + * | fc_mxcsr|fc_x87_cw| | * + * ---------------------------------------------------------------------------------- * + * * + * **************************************************************************************/ + +.text +.globl jump_fcontext +.type jump_fcontext,@function +.align 16 +jump_fcontext: + movq %rbx, (%rdi) /* save RBX */ + movq %r12, 0x8(%rdi) /* save R12 */ + movq %r13, 0x10(%rdi) /* save R13 */ + movq %r14, 0x18(%rdi) /* save R14 */ + movq %r15, 0x20(%rdi) /* save R15 */ + movq %rbp, 0x28(%rdi) /* save RBP */ + + cmp $0, %rcx + je 1f + + stmxcsr 0x50(%rdi) /* save MMX control and status word */ + fnstcw 0x54(%rdi) /* save x87 control word */ + + ldmxcsr 0x50(%rsi) /* restore MMX control and status word */ + fldcw 0x54(%rsi) /* restore x87 control word */ +1: + + leaq 0x8(%rsp), %rax /* exclude the return address and save as stack pointer */ + movq %rax, 0x30(%rdi) /* save as stack pointer */ + movq (%rsp), %rax /* save return address */ + movq %rax, 0x38(%rdi) /* save return address as RIP */ + + movq (%rsi), %rbx /* restore RBX */ + movq 0x8(%rsi), %r12 /* restore R12 */ + movq 0x10(%rsi), %r13 /* restore R13 */ + movq 0x18(%rsi), %r14 /* restore R14 */ + movq 0x20(%rsi), %r15 /* restore R15 */ + movq 0x28(%rsi), %rbp /* restore RBP */ + + movq 0x30(%rsi), %rsp /* restore RSP */ + movq 0x38(%rsi), %rcx /* fetch the address to return to */ + + movq %rdx, %rax /* use third arg as return value after jump */ + movq %rdx, %rdi /* use third arg as first arg in context function */ + + jmp *%rcx /* indirect jump to context */ +.size jump_fcontext,.-jump_fcontext + +.text +.globl make_fcontext +.type make_fcontext,@function +.align 16 +make_fcontext: + movq %rdi, (%rdi) /* save the address of passed context */ + movq %rsi, 0x38(%rdi) /* save the address of the context function */ + movq 0x40(%rdi), %rdx /* load the stack base */ + + pushq %rdi /* save pointer to fcontext_t */ + movq %rdx, %rdi /* stack pointer as arg for align_stack */ + call align_stack@PLT /* align stack */ + movq %rax, %rdx /* begin of aligned stack */ + popq %rdi /* restore pointer to fcontext_t */ + + leaq -0x8(%rdx), %rdx /* reserve space for the last frame on stack, (RSP + 8) & 15 == 0 */ + movq %rdx, 0x30(%rdi) /* save the algined stack base */ + + stmxcsr 0x50(%rdi) /* save MMX control and status word */ + fnstcw 0x54(%rdi) /* save x87 control word */ + + leaq finish(%rip), %rcx /* address of finish; called after context function returns */ + movq %rcx, (%rdx) + + xorq %rax, %rax + ret + +finish: + xorq %rdi, %rdi /* exit code is zero */ + call _exit@PLT /* exit application */ + hlt +.size make_fcontext,.-make_fcontext + diff --git a/third_party/boost_context/src/asm/fcontext_x86_64_sysv_macho_gas.s b/third_party/boost_context/src/asm/fcontext_x86_64_sysv_macho_gas.s new file mode 100644 index 0000000000..bf5a8e0889 --- /dev/null +++ b/third_party/boost_context/src/asm/fcontext_x86_64_sysv_macho_gas.s @@ -0,0 +1,113 @@ +/* + Copyright Oliver Kowalke 2009. + Distributed under the Boost Software License, Version 1.0. + (See accompanying file LICENSE_1_0.txt or copy at + http://www.boost.org/LICENSE_1_0.txt) +*/ + +/**************************************************************************************** + * * + * ---------------------------------------------------------------------------------- * + * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | * + * ---------------------------------------------------------------------------------- * + * | 0x0 | 0x4 | 0x8 | 0xc | 0x10 | 0x14 | 0x18 | 0x1c | * + * ---------------------------------------------------------------------------------- * + * | RBX | R12 | R13 | R14 | * + * ---------------------------------------------------------------------------------- * + * ---------------------------------------------------------------------------------- * + * | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | * + * ---------------------------------------------------------------------------------- * + * | 0x20 | 0x24 | 0x28 | 0x2c | 0x30 | 0x34 | 0x38 | 0x3c | * + * ---------------------------------------------------------------------------------- * + * | R15 | RBP | RSP | RIP | * + * ---------------------------------------------------------------------------------- * + * ---------------------------------------------------------------------------------- * + * | 16 | 17 | 18 | 19 | | * + * ---------------------------------------------------------------------------------- * + * | 0x40 | 0x44 | 0x48 | 0x4c | | * + * ---------------------------------------------------------------------------------- * + * | sbase | slimit | | * + * ---------------------------------------------------------------------------------- * + * ---------------------------------------------------------------------------------- * + * | 20 | 21 | | * + * ---------------------------------------------------------------------------------- * + * | 0x50 | 0x54 | | * + * ---------------------------------------------------------------------------------- * + * | fc_mxcsr|fc_x87_cw| | * + * ---------------------------------------------------------------------------------- * + * * + * **************************************************************************************/ + +.text +.globl _jump_fcontext +.align 8 +_jump_fcontext: + movq %rbx, (%rdi) /* save RBX */ + movq %r12, 0x8(%rdi) /* save R12 */ + movq %r13, 0x10(%rdi) /* save R13 */ + movq %r14, 0x18(%rdi) /* save R14 */ + movq %r15, 0x20(%rdi) /* save R15 */ + movq %rbp, 0x28(%rdi) /* save RBP */ + + cmp $0, %rcx + je 1f + + stmxcsr 0x50(%rdi) /* save MMX control and status word */ + fnstcw 0x54(%rdi) /* save x87 control word */ + + ldmxcsr 0x50(%rsi) /* restore MMX control and status word */ + fldcw 0x54(%rsi) /* restore x87 control word */ +1: + + leaq 0x8(%rsp), %rax /* exclude the return address and save as stack pointer */ + movq %rax, 0x30(%rdi) /* save as stack pointer */ + movq (%rsp), %rax /* save return address */ + movq %rax, 0x38(%rdi) /* save return address as RIP */ + + movq (%rsi), %rbx /* restore RBX */ + movq 0x8(%rsi), %r12 /* restore R12 */ + movq 0x10(%rsi), %r13 /* restore R13 */ + movq 0x18(%rsi), %r14 /* restore R14 */ + movq 0x20(%rsi), %r15 /* restore R15 */ + movq 0x28(%rsi), %rbp /* restore RBP */ + + movq 0x30(%rsi), %rsp /* restore RSP */ + movq 0x38(%rsi), %rcx /* fetch the address to return to */ + + movq %rdx, %rax /* use third arg as return value after jump */ + movq %rdx, %rdi /* use third arg as first arg in context function */ + + jmp *%rcx /* indirect jump to context */ + +.text +.globl _make_fcontext +.align 8 +_make_fcontext: + movq %rdi, (%rdi) /* save the address of current context */ + movq %rsi, 0x38(%rdi) /* save the address of the function supposed to run */ + movq 0x40(%rdi), %rdx /* load the stack base */ + + pushq %rdi /* save pointer to fcontext_t */ + movq %rdx, %rdi /* stack pointer as arg for align_stack */ + call _align_stack /* align stack */ + //call align_stack@PLT /* align stack */ + movq %rax, %rdx /* begin of aligned stack */ + popq %rdi /* restore pointer to fcontext_t */ + + leaq -0x8(%rdx), %rdx /* reserve space for the last frame on stack, (RSP + 8) % 16 == 0 */ + movq %rdx, 0x30(%rdi) /* save the address */ + + stmxcsr 0x50(%rdi) /* save MMX control and status word */ + fnstcw 0x54(%rdi) /* save x87 control word */ + + leaq finish(%rip), %rcx /* helper code executed after context function returns */ + movq %rcx, (%rdx) + + xorq %rax, %rax /* set RAX to zero */ + ret + +finish: + xorq %rdi, %rdi /* exit code is zero */ + //call _exit@PLT /* exit application */ + call _exit /* exit application */ + hlt