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md_linux: Support riscv CPU, test on starfive #28

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Jul 20, 2022
Merged

md_linux: Support riscv CPU, test on starfive #28

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b4482ab
md_linux: Support riscv CPU, test on starfive
Jul 14, 2022
4935bf4
md_linux: Fix codestyle and comments
T-bagwell Jul 14, 2022
1dc2bdf
fix comments
T-bagwell Jul 14, 2022
fb10803
README.md: add describe of supported riscv cpu
T-bagwell Jul 14, 2022
b16fdbd
md_linux: fix typo of JB_S8 value
Jul 18, 2022
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4 changes: 4 additions & 0 deletions md.h
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Original file line number Diff line number Diff line change
Expand Up @@ -186,6 +186,10 @@
/* https://github.com/ossrs/state-threads/issues/21 */
#define MD_USE_BUILTIN_SETJMP
#define MD_GET_SP(_t) *((long *)&((_t)->context[0].__jb[0]))
#elif defined(__riscv)
/* https://github.com/ossrs/state-threads/issues/21 */
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#define MD_USE_BUILTIN_SETJMP
#define MD_GET_SP(_t) *((long *)&((_t)->context[0].__jmpbuf[0]))

#elif defined(__loongarch__)
/* https://github.com/ossrs/state-threads/issues/24 */
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74 changes: 74 additions & 0 deletions md_linux.S
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Expand Up @@ -352,6 +352,80 @@



#elif defined(__riscv)

/****************************************************************/
/*
* Internal __jmp_buf layout
*/
#define JB_SP 12 /* R3, SP, Stack pointer */
#define JB_RA 11 /* R1, RA, Return address */
#define JB_FP 10 /* FP/R22 Frame pointer */
#define JB_S0 9 /* R23-R31, S0-S8, Subroutine register variable */
#define JB_S2 8 /* R23-R31, S0-S8, Subroutine register variable */
#define JB_S3 7 /* R23-R31, S0-S8, Subroutine register variable */
#define JB_S4 6 /* R23-R31, S0-S8, Subroutine register variable */
#define JB_S5 5 /* R23-R31, S0-S8, Subroutine register variable */
#define JB_S6 4 /* R23-R31, S0-S8, Subroutine register variable */
#define JB_S7 3 /* R23-R31, S0-S8, Subroutine register variable */
#define JB_S8 2 /* R23-R31, S0-S8, Subroutine register variable */
#define JB_S9 1 /* R23-R31, S0-S8, Subroutine register variable */
#define JB_S10 0 /* R23-R31, S0-S8, Subroutine register variable */


.file "md_linux.S"
.text

/* _st_md_cxt_save(__jmp_buf env) */ /* The env is $a0, https://en.wikipedia.org/wiki/MIPS_architecture#Calling_conventions */
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.globl _st_md_cxt_save
.type _st_md_cxt_save, %function
.align 2
_st_md_cxt_save:
sd sp,0(a0)
sd ra,8(a0)
sd s0,16(a0)
sd s1,24(a0)
sd s2,32(a0)
sd s3,40(a0)
sd s4,48(a0)
sd s5,56(a0)
sd s6,64(a0)
sd s7,72(a0)
sd s8,80(a0)
sd s9,88(a0)
sd s10,96(a0)
sd s11,104(a0)
li a0,0
jr ra
.size _st_md_cxt_save, .-_st_md_cxt_save

/****************************************************************/

/* _st_md_cxt_restore(__jmp_buf env, int val) */
.globl _st_md_cxt_restore
.type _st_md_cxt_restore, %function
.align 2
_st_md_cxt_restore:
ld sp,0(a0)
ld ra,8(a0)
ld s0,16(a0)
ld s1,24(a0)
ld s2,32(a0)
ld s3,40(a0)
ld s4,48(a0)
ld s5,56(a0)
ld s6,64(a0)
ld s7,72(a0)
ld s8,80(a0)
ld s9,88(a0)
ld s10,96(a0)
ld s11,104(a0)
li a0,1
jr ra
.size _st_md_cxt_restore, .-_st_md_cxt_restore

/****************************************************************/




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