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Make it possible to log kprintf() to file

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It's now possible to compile Emacs using cosmocc. However we need to
troubleshoot why it's event loop isn't working correctly at runtime.
This commit is contained in:
Justine Tunney 2023-06-05 04:16:15 -07:00
parent 9cc3e37263
commit f554dd800e
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GPG key ID: BE714B4575D6E328
12 changed files with 94 additions and 15 deletions
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6
libc/runtime/finddebugbinary.c
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@ -61,7 +61,8 @@ static bool IsMyDebugBinaryImpl(const char *path) {
// which is currently running in memory.
if ((size = lseek(fd, 0, SEEK_END)) != -1 &&
(map = mmap(0, size, PROT_READ, MAP_SHARED, fd, 0)) != MAP_FAILED) {
if (GetElfSymbolValue(map, size, "_etext", &value)) {
if (IsElf64Binary(map, size) &&
GetElfSymbolValue(map, size, "_etext", &value)) {
res = !_etext || value == (uintptr_t)_etext;
}
munmap(map, size);
@ -94,7 +95,8 @@ const char *FindDebugBinary(void) {
if (!once) {
p = GetProgramExecutableName();
n = strlen(p);
if (n > 4 && READ32LE(p + n - 4) == READ32LE(".dbg")) {
if (n > 4 && READ32LE(p + n - 4) == READ32LE(".dbg") ||
IsMyDebugBinary(p)) {
res = p;
} else if (n > 4 && READ32LE(p + n - 4) == READ32LE(".com") &&
n + 4 < ARRAYLEN(buf)) {