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Remove some problematic APIs

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In order to improve our chances of success building other open source
projects we shouldn't define APIs that'll lead any ./configure script
astray. For example:

- brk() and sbrk() can break mac/windows support
- syscall() is a superb way to break portability
- arch_prctl() is the greatest of all horror shows
This commit is contained in:
Justine Tunney 2023-06-08 06:12:26 -07:00
parent 7512318a2a
commit 32682f0ce7
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GPG key ID: BE714B4575D6E328
24 changed files with 37 additions and 919 deletions
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2
libc/runtime/opensymboltable.greg.c
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@ -51,7 +51,7 @@ static struct SymbolTable *OpenSymbolTableImpl(const char *filename) {
ptrdiff_t names_offset, name_base_offset, stp_offset;
map = MAP_FAILED;
if ((fd = open(filename, O_RDONLY)) == -1) return 0;
if ((filesize = getfiledescriptorsize(fd)) == -1) goto SystemError;
if ((filesize = lseek(fd, 0, SEEK_END)) == -1) goto SystemError;
if (filesize > INT_MAX) goto RaiseE2big;
if (filesize < 64) goto RaiseEnoexec;
elf = map = mmap(0, filesize, PROT_READ, MAP_PRIVATE, fd, 0);