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Make progress towards aarch64 build

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Justine Tunney 2023-05-01 19:43:59 -07:00
parent 08ff26c817
commit ca2860947f
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GPG key ID: BE714B4575D6E328
15428 changed files with 25694 additions and 23138 deletions
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45
libc/runtime/morph.greg.c
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@ -38,8 +38,33 @@
__msabi extern typeof(VirtualProtect) *const __imp_VirtualProtect;
static inline int __morph_rt_sigprocmask(int h, const sigset_t *s, sigset_t *o,
size_t c) {
#ifdef __aarch64__
register long r0 asm("x0") = (long)h;
register long r1 asm("x1") = (long)s;
register long r2 asm("x2") = (long)o;
register long r3 asm("x3") = (long)c;
register long res_x0 asm("x0");
asm volatile("mov\tx8,%1\n"
"svc\t0"
: "=r"(res_x0)
: "i"(135), "r"(r0), "r"(r1), "r"(r2), "r"(r3)
: "x8", "memory");
return res_x0;
#else
return 0;
#endif
}
static inline int __morph_sigprocmask(int how, const sigset_t *set,
sigset_t *oldset) {
return __morph_rt_sigprocmask(how, set, oldset, sizeof(*set));
}
static privileged void __morph_mprotect(void *addr, size_t size, int prot,
int ntprot) {
#ifdef __x86_64__
bool cf;
int ax, dx;
uint32_t op;
@ -60,6 +85,18 @@ static privileged void __morph_mprotect(void *addr, size_t size, int prot,
} else {
__imp_VirtualProtect(addr, size, ntprot, &op);
}
#elif defined(__aarch64__)
register long r0 asm("x0") = (long)addr;
register long r1 asm("x1") = (long)size;
register long r2 asm("x2") = (long)prot;
register long res_x0 asm("x0");
asm volatile("mov\tx8,%1\n"
"svc\t0"
: "=r"(res_x0)
: "i"(226), "r"(r0), "r"(r1), "r"(r2)
: "x8", "memory");
_npassert(!res_x0);
#endif
}
/**
@ -73,6 +110,7 @@ privileged void __morph_begin(sigset_t *save) {
intptr_t dx;
sigset_t ss = {{-1, -1}};
STRACE("__morph_begin()");
#ifdef __x86_64__
if (IsOpenbsd()) {
asm volatile(CFLAG_ASM("syscall")
: CFLAG_CONSTRAINT(cf), "=a"(ax), "=d"(dx)
@ -88,6 +126,9 @@ privileged void __morph_begin(sigset_t *save) {
: "rcx", "r8", "r9", "r10", "r11", "memory", "cc");
_npassert(!ax);
}
#else
__morph_sigprocmask(SIG_BLOCK, &ss, save);
#endif
__morph_mprotect(_base, __privileged_addr - _base, PROT_READ | PROT_WRITE,
kNtPageWritecopy);
}
@ -101,6 +142,7 @@ privileged void __morph_end(sigset_t *save) {
bool cf;
__morph_mprotect(_base, __privileged_addr - _base, PROT_READ | PROT_EXEC,
kNtPageExecuteRead);
#ifdef __x86_64__
if (IsOpenbsd()) {
asm volatile(CFLAG_ASM("syscall")
: CFLAG_CONSTRAINT(cf), "=a"(ax), "=d"(dx)
@ -115,5 +157,8 @@ privileged void __morph_end(sigset_t *save) {
: "rcx", "r8", "r9", "r10", "r11", "memory", "cc");
_npassert(!ax);
}
#else
__morph_sigprocmask(SIG_SETMASK, save, 0);
#endif
STRACE("__morph_end()");
}