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Improve signal handling and math

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- Polyfill ucontext_t on FreeBSD/OpenBSD/NetBSD
- Add tests confirming signals can edit CPU state
- Work towards supporting ZIP filesystem on bare metal
- Add more tinymath unit tests for POSIX conformance
- Add X87 and SSE status flags to crash report
- Fix some bugs in blinkenlights
- Fix llvm build breakage
This commit is contained in:
Justine Tunney 2021-02-25 18:30:17 -08:00
parent cdc54ea1fd
commit 40291c9db3
109 changed files with 2316 additions and 520 deletions
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6
libc/tinymath/copysignl.S
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@ -18,8 +18,12 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/runtime/pc.internal.h"
#include "libc/macros.h"
.source __FILE__
// Returns 𝑥 with same sign as 𝑦.
//
// @param 𝑥 is an 80-bit long double passed on stack in 16-bytes
// @param 𝑦 is the power, also pushed on stack, in reverse order
// @return result on FPU stack in %st
copysignl:
push %rbp
mov %rsp,%rbp