diff options
Diffstat (limited to 'lib/mlibc/sysdeps/linux/aarch64/cp_syscall.S')
| -rw-r--r-- | lib/mlibc/sysdeps/linux/aarch64/cp_syscall.S | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/lib/mlibc/sysdeps/linux/aarch64/cp_syscall.S b/lib/mlibc/sysdeps/linux/aarch64/cp_syscall.S new file mode 100644 index 0000000..98690c7 --- /dev/null +++ b/lib/mlibc/sysdeps/linux/aarch64/cp_syscall.S @@ -0,0 +1,31 @@ +.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: + mov x8, x0 + mov x0, x1 + mov x1, x2 + mov x2, x3 + mov x3, x4 + mov x4, x5 + mov x5, x6 + + mrs x7, tpidr_el0 + ldr w7, [x7, #-80] // Tcb::cancelBits. See asserts in tcb.hpp. +__mlibc_syscall_begin: + // tcbCancelEnableBit && tcbCancelTriggerBit + mov x9, #((1 << 0) | (1 << 2)) + and x7, x7, x9 + cmp x7, x9 + b.eq cancel + svc 0 +__mlibc_syscall_end: + ret + +cancel: + bl __mlibc_do_cancel + brk #0 +.section .note.GNU-stack,"",%progbits + |