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| author | Vladimir Azarov <avm@intermediate-node.net> | 2024-10-01 15:47:05 +0200 |
|---|---|---|
| committer | Vladimir Azarov <avm@intermediate-node.net> | 2024-10-01 15:47:05 +0200 |
| commit | 4abab5ad6c8465a7528ccdd5f49367da05f78bbd (patch) | |
| tree | ebf009bf1376a5a223a915bc27cbbd791a1316bc /src/process/riscv64/vfork.s | |
Initial version
Diffstat (limited to 'src/process/riscv64/vfork.s')
| -rw-r--r-- | src/process/riscv64/vfork.s | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/process/riscv64/vfork.s b/src/process/riscv64/vfork.s new file mode 100644 index 0000000..c93dca2 --- /dev/null +++ b/src/process/riscv64/vfork.s @@ -0,0 +1,12 @@ +.global vfork +.type vfork,@function +vfork: + /* riscv does not have SYS_vfork, so we must use clone instead */ + /* note: riscv's clone = clone(flags, sp, ptidptr, tls, ctidptr) */ + li a7, 220 + li a0, 0x100 | 0x4000 | 17 /* flags = CLONE_VM | CLONE_VFORK | SIGCHLD */ + mv a1, sp + /* the other arguments are ignoreable */ + ecall + .hidden __syscall_ret + j __syscall_ret |