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boost context suppoprt for riscv64 (#4375)
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* Add riscv64 boost context asm sources

* Add riscv64 config.m4 support

* Backport boost context asm for riscv64
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@dixyes
dixyes committed Aug 16, 2021
1 parent a2ef8c0 commit 71502c2
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7 changes: 7 additions & 0 deletions config.m4
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Original file line number Diff line number Diff line change
Expand Up @@ -676,6 +676,7 @@ if test "$PHP_SWOOLE" != "no"; then
[arm64*], [SW_CPU="arm64"],
[mips64*], [SW_CPU="mips64"],
[mips*], [SW_CPU="mips32"],
[riscv64*], [SW_CPU="riscv64"],
[
SW_USE_ASM_CONTEXT="no"
]
Expand Down Expand Up @@ -731,6 +732,12 @@ if test "$PHP_SWOOLE" != "no"; then
else
SW_USE_ASM_CONTEXT="no"
fi
elif test "$SW_CPU" = "riscv64"; then
if test "$SW_OS" = "LINUX"; then
SW_CONTEXT_ASM_FILE="riscv64_sysv_elf_gas.S"
else
SW_USE_ASM_CONTEXT="no"
fi
else
SW_USE_ASM_CONTEXT="no"
fi
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153 changes: 153 additions & 0 deletions thirdparty/boost/asm/jump_riscv64_sysv_elf_gas.S
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@@ -0,0 +1,153 @@
/*
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| *
* ------------------------------------------------- *
* | fs0 | fs1 | fs2 | fs3 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | *
* ------------------------------------------------- *
* | 0x20| 0x24| 0x28| 0x2c| 0x30| 0x34| 0x38| 0x3c| *
* ------------------------------------------------- *
* | fs4 | fs5 | fs6 | fs7 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | *
* ------------------------------------------------- *
* | 0x40| 0x44| 0x48| 0x4c| 0x50| 0x54| 0x58| 0x5c| *
* ------------------------------------------------- *
* | fs8 | fs9 | fs10 | fs11 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | *
* ------------------------------------------------- *
* | 0x60| 0x64| 0x68| 0x6c| 0x70| 0x74| 0x78| 0x7c| *
* ------------------------------------------------- *
* | s0 | s1 | s2 | s3 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | *
* ------------------------------------------------- *
* | 0x80| 0x84| 0x88| 0x8c| 0x90| 0x94| 0x98| 0x9c| *
* ------------------------------------------------- *
* | s4 | s5 | s6 | s7 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | *
* ------------------------------------------------- *
* | 0xa0| 0xa4| 0xa8| 0xac| 0xb0| 0xb4| 0xb8| 0xbc| *
* ------------------------------------------------- *
* | s8 | s9 | s10 | s11 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 48 | 49 | 50 | 51 | | | | | *
* ------------------------------------------------- *
* | 0xc0| 0xc4| 0xc8| 0xcc| | | | | *
* ------------------------------------------------- *
* | ra | pc | | | *
* ------------------------------------------------- *
* *
*******************************************************/

.file "jump_riscv64_sysv_elf_gas.S"
.text
.align 1
.global jump_fcontext
.type jump_fcontext, %function
jump_fcontext:
# prepare stack for GP + FPU
addi sp, sp, -0xd0

beqz a3, .L1

# save fs0 - fs11
fsd fs0, 0x00(sp)
fsd fs1, 0x08(sp)
fsd fs2, 0x10(sp)
fsd fs3, 0x18(sp)
fsd fs4, 0x20(sp)
fsd fs5, 0x28(sp)
fsd fs6, 0x30(sp)
fsd fs7, 0x38(sp)
fsd fs8, 0x40(sp)
fsd fs9, 0x48(sp)
fsd fs10, 0x50(sp)
fsd fs11, 0x58(sp)
.L1:

# save s0-s11, ra
sd s0, 0x60(sp)
sd s1, 0x68(sp)
sd s2, 0x70(sp)
sd s3, 0x78(sp)
sd s4, 0x80(sp)
sd s5, 0x88(sp)
sd s6, 0x90(sp)
sd s7, 0x98(sp)
sd s8, 0xa0(sp)
sd s9, 0xa8(sp)
sd s10, 0xb0(sp)
sd s11, 0xb8(sp)
sd ra, 0xc0(sp)

# save RA as PC
sd ra, 0xc8(sp)

# store SP (pointing to context-data) in A0
sd sp, (a0)

# restore SP (pointing to context-data) from A1
mv sp, a1

beqz a3, .L2
# load fs0 - fs11
fld fs0, 0x00(sp)
fld fs1, 0x08(sp)
fld fs2, 0x10(sp)
fld fs3, 0x18(sp)
fld fs4, 0x20(sp)
fld fs5, 0x28(sp)
fld fs6, 0x30(sp)
fld fs7, 0x38(sp)
fld fs8, 0x40(sp)
fld fs9, 0x48(sp)
fld fs10, 0x50(sp)
fld fs11, 0x58(sp)
.L2:

# load s0-s11,ra
ld s0, 0x60(sp)
ld s1, 0x68(sp)
ld s2, 0x70(sp)
ld s3, 0x78(sp)
ld s4, 0x80(sp)
ld s5, 0x88(sp)
ld s6, 0x90(sp)
ld s7, 0x98(sp)
ld s8, 0xa0(sp)
ld s9, 0xa8(sp)
ld s10, 0xb0(sp)
ld s11, 0xb8(sp)
ld ra, 0xc0(sp)

# use A2 as return value
mv a0, a2

# load pc
ld a2, 0xc8(sp)

# restore stack from GP + FPU
addi sp, sp, 0xd0

jr a2
.size jump_fcontext,.-jump_fcontext
# Mark that we don't need executable stack.
.section .note.GNU-stack,"",%progbits
91 changes: 91 additions & 0 deletions thirdparty/boost/asm/make_riscv64_sysv_elf_gas.S
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@@ -0,0 +1,91 @@
/*
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| *
* ------------------------------------------------- *
* | fs0 | fs1 | fs2 | fs3 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | *
* ------------------------------------------------- *
* | 0x20| 0x24| 0x28| 0x2c| 0x30| 0x34| 0x38| 0x3c| *
* ------------------------------------------------- *
* | fs4 | fs5 | fs6 | fs7 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | *
* ------------------------------------------------- *
* | 0x40| 0x44| 0x48| 0x4c| 0x50| 0x54| 0x58| 0x5c| *
* ------------------------------------------------- *
* | fs8 | fs9 | fs10 | fs11 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | *
* ------------------------------------------------- *
* | 0x60| 0x64| 0x68| 0x6c| 0x70| 0x74| 0x78| 0x7c| *
* ------------------------------------------------- *
* | s0 | s1 | s2 | s3 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | *
* ------------------------------------------------- *
* | 0x80| 0x84| 0x88| 0x8c| 0x90| 0x94| 0x98| 0x9c| *
* ------------------------------------------------- *
* | s4 | s5 | s6 | s7 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | *
* ------------------------------------------------- *
* | 0xa0| 0xa4| 0xa8| 0xac| 0xb0| 0xb4| 0xb8| 0xbc| *
* ------------------------------------------------- *
* | s8 | s9 | s10 | s11 | *
* ------------------------------------------------- *
* ------------------------------------------------- *
* | 48 | 49 | 50 | 51 | | | | | *
* ------------------------------------------------- *
* | 0xc0| 0xc4| 0xc8| 0xcc| | | | | *
* ------------------------------------------------- *
* | ra | pc | | | *
* ------------------------------------------------- *
* *
*******************************************************/

.file "make_riscv64_sysv_elf_gas.S"
.text
.align 1
.global make_fcontext
.type make_fcontext, %function
make_fcontext:
# shift address in a0 (allocated stack) to lower 16 byte boundary
andi a0, a0, ~0xF

# reserve space for context-data on context-stack
addi a0, a0, -0xd0

# third arg of make_fcontext() == address of context-function
# store address as a PC to jump in
sd a2, 0xc8(a0)

# save address of finish as return-address for context-function
# will be entered after context-function returns (RA register)
lla a4, finish
sd a4, 0xc0(a0)

ret // return pointer to context-data (a0)

finish:
# exit code is zero
li a0, 0
# exit application
tail _exit@plt

.size make_fcontext,.-make_fcontext
# Mark that we don't need executable stack.
.section .note.GNU-stack,"",%progbits

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