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Hunt down more bugs

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After going through the MODE=dbg and MODE=zero build modes, a bunch of
little issues were identified, which have been addressed. Fixing those
issues created even more troubles for the project, because it improved
our ability to detect latent problems which are getting fixed so fast.
This commit is contained in:
Justine Tunney 2023-07-03 17:35:11 -07:00
parent 73c0faa1b5
commit 97b7116953
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GPG key ID: BE714B4575D6E328
39 changed files with 557 additions and 754 deletions
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43
libc/calls/tailcontext.S
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@ -64,6 +64,47 @@ __tailcontext:
#elif defined(__aarch64__)
#define REGS(i) 184+i*8
/*void setfpsimd(const ucontext_t *uc) {
struct fpsimd_context *fp;
fp = (struct fpsimd_context *)uc->uc_mcontext.__reserved;
if (fp[0].head.magic == FPSIMD_MAGIC) {
asm("msr\tfpsr,%0" ::"r"(fp->fpsr));
asm("msr\tfpcr,%0" ::"r"(fp->fpcr));
asm("ldp\tq0,q1,%0" ::"m"(fp->vregs[0]));
asm("ldp\tq2,q3,%0" ::"m"(fp->vregs[2]));
asm("ldp\tq4,q5,%0" ::"m"(fp->vregs[4]));
asm("ldp\tq6,q7,%0" ::"m"(fp->vregs[6]));
asm("ldp\tq8,q9,%0" ::"m"(fp->vregs[8]));
asm("ldp\tq10,q11,%0" ::"m"(fp->vregs[10]));
asm("ldp\tq12,q13,%0" ::"m"(fp->vregs[12]));
asm("ldp\tq14,q15,%0" ::"m"(fp->vregs[14]));
}
}*/
ldr w14,[x0,464]
add x15,x0,464
mov w13,0x8001
movk w13,0x4650,lsl 16
cmp w14,w13
bne 1f
ldr w13,[x15,8]
msr fpsr,x13
ldr w13,[x15,12]
msr fpcr,x13
ldp q0,q1,[x15,16]
ldp q2,q3,[x15,48]
ldp q4,q5,[x15,80]
ldp q6,q7,[x15,112]
ldp q8,q9,[x15,144]
ldp q10,q11,[x15,176]
ldp q12,q13,[x15,208]
ldp q14,q15,[x15,240]
1:
// x16 is clobbered
// x18 belongs to apple
// all other registers are restored
ldp x1,x16,[x0,REGS(31)] // sp, pc
mov sp,x1
ldr x30,[x0,REGS(30)]
@ -72,7 +113,7 @@ __tailcontext:
ldp x24,x25,[x0,REGS(24)]
ldp x22,x23,[x0,REGS(22)]
ldp x20,x21,[x0,REGS(20)]
ldp x18,x19,[x0,REGS(18)]
ldr x19,[x0,REGS(19)]
ldr x17,[x0,REGS(17)]
ldp x14,x15,[x0,REGS(14)]
ldp x12,x13,[x0,REGS(12)]