diff options
Diffstat (limited to 'lib/mlibc/sysdeps/linux/riscv64/cp_syscall.S')
| -rw-r--r-- | lib/mlibc/sysdeps/linux/riscv64/cp_syscall.S | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/lib/mlibc/sysdeps/linux/riscv64/cp_syscall.S b/lib/mlibc/sysdeps/linux/riscv64/cp_syscall.S new file mode 100644 index 0000000..8d3175d --- /dev/null +++ b/lib/mlibc/sysdeps/linux/riscv64/cp_syscall.S @@ -0,0 +1,30 @@ +.section .text +.global __mlibc_do_asm_cp_syscall +.global __mlibc_syscall_begin +.global __mlibc_syscall_end +.type __mlibc_do_asm_cp_syscall, "function" +__mlibc_do_asm_cp_syscall: + sd a7, -8(sp) + mv a7, a0 + mv a0, a1 + mv a1, a2 + mv a2, a3 + mv a3, a4 + mv a4, a5 + mv a5, a6 + ld a6, -8(sp) // a7 + lw t0, -96(tp) // Tcb::cancelBits. See asserts in tcb.hpp. +__mlibc_syscall_begin: + // tcbCancelEnableBit && tcbCancelTriggerBit + li t1, (1 << 0) | (1 << 2) + and t0, t0, t1 + beq t0, t1, cancel + ecall +__mlibc_syscall_end: + ret + +cancel: + call __mlibc_do_cancel + unimp +.section .note.GNU-stack,"",%progbits + |