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Add support for symbol table in .com files

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This change fixes minor bugs and adds a feature, which lets us store the
ELF symbol table, inside the ZIP directory. We use the path /zip/.symtab
which can be safely removed using a zip editing tool, to make the binary
smaller after compilation. This supplements the existing method of using
a separate .com.dbg file, which is still supported. The intent is people
don't always know that it's a good idea to download the debug file. It's
not great having someone's first experience be a crash report, that only
has numbers rather than symbols. This will help fix that!
This commit is contained in:
Justine Tunney 2022-03-23 06:31:55 -07:00
parent 393ca4be40
commit 23b72eb617
61 changed files with 963 additions and 510 deletions
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21
libc/calls/writev.c
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@ -19,6 +19,7 @@
#include "libc/bits/weaken.h"
#include "libc/calls/calls.h"
#include "libc/calls/internal.h"
#include "libc/calls/strace.internal.h"
#include "libc/intrin/asan.internal.h"
#include "libc/sock/internal.h"
#include "libc/sysv/errfuns.h"
@ -35,21 +36,25 @@
* @return number of bytes actually handed off, or -1 w/ errno
*/
ssize_t writev(int fd, const struct iovec *iov, int iovlen) {
ssize_t rc;
if (fd >= 0 && iovlen >= 0) {
if (IsAsan() && !__asan_is_valid_iov(iov, iovlen)) return efault();
if (fd < g_fds.n && g_fds.p[fd].kind == kFdZip) {
return weaken(__zipos_write)(
if (IsAsan() && !__asan_is_valid_iov(iov, iovlen)) {
rc = efault();
} else if (fd < g_fds.n && g_fds.p[fd].kind == kFdZip) {
rc = weaken(__zipos_write)(
(struct ZiposHandle *)(intptr_t)g_fds.p[fd].handle, iov, iovlen, -1);
} else if (!IsWindows() && !IsMetal()) {
return sys_writev(fd, iov, iovlen);
rc = sys_writev(fd, iov, iovlen);
} else if (fd >= g_fds.n) {
return ebadf();
rc = ebadf();
} else if (IsMetal()) {
return sys_writev_metal(g_fds.p + fd, iov, iovlen);
rc = sys_writev_metal(g_fds.p + fd, iov, iovlen);
} else {
return sys_writev_nt(fd, iov, iovlen);
rc = sys_writev_nt(fd, iov, iovlen);
}
} else {
return einval();
rc = einval();
}
STRACE("writev(%d, %p, %d) → %'zd% m", fd, iov, iovlen, rc);
return rc;
}