diff options
Diffstat (limited to 'src/uapi')
| -rw-r--r-- | src/uapi/dispatch.c | 1 | ||||
| -rw-r--r-- | src/uapi/mem.c | 28 |
2 files changed, 29 insertions, 0 deletions
diff --git a/src/uapi/dispatch.c b/src/uapi/dispatch.c index 16a17d2..4135171 100644 --- a/src/uapi/dispatch.c +++ b/src/uapi/dispatch.c @@ -50,6 +50,7 @@ void handle_syscall(sys_arg_t syscall, sys_arg_t a, sys_arg_t b, case SYS_PUTCH: sys_putch(t, a, b, c, d, e); break; case SYS_REQ_MEM: sys_req_mem(t, a, b, c, d, e); break; case SYS_REQ_PMEM: sys_req_pmem(t, a, b, c, d, e); break; + case SYS_REQ_PAGE: sys_req_page(t, a, b, c, d, e); break; case SYS_REQ_FIXMEM: sys_req_fixmem(t, a, b, c, d, e); break; case SYS_REQ_SHAREDMEM: sys_req_sharedmem(t, a, b, c, d, e); break; case SYS_REF_SHAREDMEM: sys_ref_sharedmem(t, a, b, c, d, e); break; diff --git a/src/uapi/mem.c b/src/uapi/mem.c index 17823a1..49370fc 100644 --- a/src/uapi/mem.c +++ b/src/uapi/mem.c @@ -106,6 +106,34 @@ SYSCALL_DEFINE3(req_pmem)(struct tcb *t, sys_arg_t paddr, sys_arg_t size, } /** + * Allocate some contiguous region in memory. + * Due to page allocation constraints, this is generally just one page that's + * larger than the \p size parameter. Should work fine for 4K - 2M allocations, + * which I assume is generally what is used, but we'll see if I have to + * implement an actually good page allocator at some point. + * + * @param t Current tcb. + * @param size Minimum size of mapping. + * @param flags Flags of mapping. Unsure why you'd want anything besides VM_W | + * VM_R, but eh. + * + * @return \see sys_req_page(). + */ +SYSCALL_DEFINE2(req_page)(struct tcb *t, sys_arg_t size, sys_arg_t flags) +{ + struct tcb *r = get_cproc(t); + + pm_t addr = 0; + vm_t start = 0; + size_t asize = 0; + flags = sanitize_uvflags(flags); + if (!(start = alloc_uvpage(r, size, flags, &addr, &asize))) + return_args1(t, ERR_OOMEM); + + return_args4(t, OK, start, addr, asize); +} + +/** * Request shared memory syscall handler. * * @param t Current tcb. |