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Add syscalls to Blinkenlights and fix bugs

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This commit is contained in:
Justine Tunney 2022-05-13 13:31:21 -07:00
parent f6df29cc3d
commit 578cb21591
25 changed files with 187 additions and 108 deletions
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28
tool/build/lib/syscall.c
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@ -37,6 +37,7 @@
#include "libc/mem/mem.h"
#include "libc/nexgen32e/vendor.internal.h"
#include "libc/runtime/gc.internal.h"
#include "libc/runtime/pc.internal.h"
#include "libc/runtime/runtime.h"
#include "libc/sock/select.h"
#include "libc/sock/sock.h"
@ -221,6 +222,7 @@ static int XlatMapFlags(int x) {
if (x & 2) res |= MAP_PRIVATE;
if (x & 16) res |= MAP_FIXED;
if (x & 32) res |= MAP_ANONYMOUS;
if (x & 256) res |= MAP_GROWSDOWN;
return res;
}
@ -522,7 +524,8 @@ static int OpMadvise(struct Machine *m, int64_t addr, size_t length,
static int64_t OpBrk(struct Machine *m, int64_t addr) {
addr = ROUNDUP(addr, PAGESIZE);
if (addr > m->brk) {
if (ReserveVirtual(m, m->brk, addr - m->brk, 0x0207) != -1) {
if (ReserveVirtual(m, m->brk, addr - m->brk,
PAGE_V | PAGE_RW | PAGE_U | PAGE_RSRV) != -1) {
m->brk = addr;
}
} else if (addr < m->brk) {
@ -545,9 +548,10 @@ static int64_t OpMmap(struct Machine *m, int64_t virt, size_t size, int prot,
VERBOSEF("MMAP%s %012lx %,ld %#x %#x %d %#lx", GetSimulated(), virt, size,
prot, flags, fd, offset);
if (prot & PROT_READ) {
key = 0x0205;
if (prot & PROT_WRITE) key |= 2;
if (!(prot & PROT_EXEC)) key |= 0x8000000000000000;
key = PAGE_RSRV | PAGE_U | PAGE_V;
if (prot & PROT_WRITE) key |= PAGE_RW;
if (!(prot & PROT_EXEC)) key |= PAGE_XD;
if (flags & 256 /* MAP_GROWSDOWN */) key |= PAGE_GROD;
flags = XlatMapFlags(flags);
if (fd != -1 && (fd = XlatFd(m, fd)) == -1) return -1;
if (!(flags & MAP_FIXED)) {
@ -1127,6 +1131,21 @@ static int OpGetrlimit(struct Machine *m, int resource, int64_t rlimitaddr) {
return enosys();
}
static ssize_t OpReadlinkat(struct Machine *m, int dirfd, int64_t pathaddr,
int64_t bufaddr, size_t size) {
char *buf;
ssize_t rc;
const char *path;
if ((dirfd = XlatAfd(m, dirfd)) == -1) return -1;
path = LoadStr(m, pathaddr);
if (!(buf = malloc(size))) return enomem();
if ((rc = readlinkat(dirfd, path, buf, size)) != -1) {
VirtualRecvWrite(m, bufaddr, buf, rc);
}
free(buf);
return rc;
}
static int64_t OpGetcwd(struct Machine *m, int64_t bufaddr, size_t size) {
size_t n;
char *buf;
@ -1437,6 +1456,7 @@ void OpSyscall(struct Machine *m, uint32_t rde) {
SYSCALL(0x106, OpFstatat(m, di, si, dx, r0));
SYSCALL(0x107, OpUnlinkat(m, di, si, dx));
SYSCALL(0x108, OpRenameat(m, di, si, dx, r0));
SYSCALL(0x10B, OpReadlinkat(m, di, si, dx, r0));
SYSCALL(0x10D, OpFaccessat(m, di, si, dx, r0));
SYSCALL(0x113, splice(di, P(si), dx, P(r0), r8, XlatAtf(r9)));
SYSCALL(0x115, sync_file_range(di, si, dx, XlatAtf(r0)));