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Get binaries closer to running without an o/s

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blinkenlights now does a pretty good job emulating what happens when
binaries boot from BIOS into long mode. So it's been much easier to
debug the bare metal process and wrinkle out many issues.
This commit is contained in:
Justine Tunney 2020-10-29 04:53:20 -07:00
parent feed0d2b0e
commit 2d80bbc802
50 changed files with 974 additions and 1062 deletions
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18
tool/build/lib/time.c
View file

@ -22,6 +22,7 @@
#include "libc/sysv/consts/clock.h"
#include "libc/time/time.h"
#include "tool/build/lib/endian.h"
#include "tool/build/lib/modrm.h"
#include "tool/build/lib/time.h"
/**
@ -41,11 +42,18 @@ void OpRdtsc(struct Machine *m, uint32_t rde) {
Write64(m->dx, (c >> 040) & 0xffffffff);
}
void OpRdtscp(struct Machine *m, uint32_t rde) {
uint32_t core, node, tscaux;
OpRdtsc(m, rde);
static int64_t GetTscAux(struct Machine *m) {
uint32_t core, node;
core = 0;
node = 0;
tscaux = (node & 0xfff) << 12 | (core & 0xfff);
Write64(m->cx, tscaux & 0xffffffff);
return (node & 0xfff) << 12 | (core & 0xfff);
}
void OpRdtscp(struct Machine *m, uint32_t rde) {
OpRdtsc(m, rde);
Write64(m->cx, GetTscAux(m));
}
void OpRdpid(struct Machine *m, uint32_t rde) {
Write64(RegRexbRm(m, rde), GetTscAux(m));
}