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i#3544 riscv64: Implemented dr_setjmp and dr_longjmp #6071

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May 21, 2023
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i#3544 riscv64: Implemented dr_setjmp and dr_longjmp #6071

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i#3544 riscv64: Implemented dr_setjmp
shiptux May 19, 2023
7a1ccc0
Implemented dr_setjmp
shiptux May 19, 2023
3859e20
Fix review
shiptux May 20, 2023
702e762
Fix review
shiptux May 20, 2023
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fixed review2
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fixed review3
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fixed review
shiptux May 21, 2023
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fixed review2
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Fix review4
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5 changes: 4 additions & 1 deletion core/arch/arch_exports.h
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Original file line number Diff line number Diff line change
Expand Up @@ -1608,7 +1608,10 @@ typedef struct dr_jmp_buf_t {
#elif defined(AARCH64) /* for aarch64.asm */
# define REGS_IN_JMP_BUF 22 /* See dr_setjmp and dr_longjmp. */
reg_t regs[REGS_IN_JMP_BUF];
#endif /* X86/AARCH64/ARM */
#elif defined(RISCV64) /* For riscv64.asm. */
# define REGS_IN_JMP_BUF 25 /* See dr_setjmp and dr_longjmp. */
reg_t regs[REGS_IN_JMP_BUF];
#endif /* X86/AARCH64/ARM/RISCV64 */
#if defined(UNIX) && defined(DEBUG)
/* i#226/PR 492568: we avoid the cost of storing this by using the
* mask in the fault's signal frame, but we do record it in debug
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73 changes: 68 additions & 5 deletions core/arch/riscv64/riscv64.asm
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Expand Up @@ -208,16 +208,51 @@ ADDRTAKEN_LABEL(safe_read_asm_recover:)
*/
DECLARE_EXPORTED_FUNC(dr_try_start)
GLOBAL_LABEL(dr_try_start:)
addi ARG1, ARG1, TRY_CXT_SETJMP_OFFS
addi ARG1, ARG1, TRY_CXT_SETJMP_OFFS
j GLOBAL_REF(dr_setjmp)
END_FUNC(dr_try_start)

/*
/* We save only callee-saved registers: SP, x8/fp, x9, x18-x27, f8-9, f18-27:
* a total of 25 reg_t (64-bit) slots. See definition of dr_jmp_buf_t.
*
* int dr_setjmp(dr_jmp_buf_t *buf);
*/
DECLARE_FUNC(dr_setjmp)
GLOBAL_LABEL(dr_setjmp:)
/* FIXME i#3544: Not implemented */
mv t0, sp
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sd t0, 0 (ARG1)
sd x8, 8 (ARG1)
sd x9, 16 (ARG1)
sd x18, 24 (ARG1)
sd x19, 32 (ARG1)
sd x20, 40 (ARG1)
sd x21, 48 (ARG1)
sd x22, 56 (ARG1)
sd x23, 64 (ARG1)
sd x24, 72 (ARG1)
sd x25, 80 (ARG1)
sd x26, 88 (ARG1)
sd x27, 96 (ARG1)
fsd f8, 104 (ARG1)
fsd f9, 112 (ARG1)
fsd f18, 120 (ARG1)
fsd f19, 128 (ARG1)
fsd f20, 136 (ARG1)
fsd f21, 144 (ARG1)
fsd f22, 152 (ARG1)
fsd f23, 160 (ARG1)
fsd f24, 168 (ARG1)
fsd f25, 176 (ARG1)
fsd f26, 184 (ARG1)
fsd f27, 192 (ARG1)
# ifdef UNIX
addi sp, sp, -16
sd ra, 0 (sp)
jal GLOBAL_REF(dr_setjmp_sigmask)
ld ra, 0 (sp)
add sp, sp, 16
# endif
li a0, 0
ret
END_FUNC(dr_setjmp)

Expand All @@ -226,8 +261,36 @@ GLOBAL_LABEL(dr_setjmp:)
*/
DECLARE_FUNC(dr_longjmp)
GLOBAL_LABEL(dr_longjmp:)
/* FIXME i#3544: Not implemented */
ret
ld t0, 0 (ARG1)
mv sp, t0
ld x8, 8 (ARG1)
ld x9, 16 (ARG1)
ld x18, 24 (ARG1)
ld x19, 32 (ARG1)
ld x20, 40 (ARG1)
ld x21, 48 (ARG1)
ld x22, 56 (ARG1)
ld x23, 64 (ARG1)
ld x24, 72 (ARG1)
ld x25, 80 (ARG1)
ld x26, 88 (ARG1)
ld x27, 96 (ARG1)
fld f8, 104 (ARG1)
fld f9, 112 (ARG1)
fld f18, 120 (ARG1)
fld f19, 128 (ARG1)
fld f20, 136 (ARG1)
fld f21, 144 (ARG1)
fld f22, 152 (ARG1)
fld f23, 160 (ARG1)
fld f24, 168 (ARG1)
fld f25, 176 (ARG1)
fld f26, 184 (ARG1)
fld f27, 192 (ARG1)
beqz ARG1, skip
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addi ARG1, ARG1, 1
skip:
jalr ra
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END_FUNC(dr_longjmp)

/* int atomic_swap(int *adr, int val) */
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