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Rewrite Linux pledge() code so it can be a payload

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It's now possible to build our pledge() polyfill as a dynamic shared
object that can be injected into a glibc executable using LD_PRELOAD
This commit is contained in:
Justine Tunney 2022-08-08 11:41:08 -07:00
parent 7bd4179b9b
commit 0277d7d6e9
37 changed files with 1980 additions and 1600 deletions
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13
libc/calls/pledge.internal.h
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@ -1,9 +1,20 @@
#ifndef COSMOPOLITAN_LIBC_CALLS_PLEDGE_INTERNAL_H_
#define COSMOPOLITAN_LIBC_CALLS_PLEDGE_INTERNAL_H_
#include "libc/calls/pledge.h"
#include "libc/intrin/promises.internal.h"
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
int ParsePromises(const char *, unsigned long *);
struct Pledges {
const char *name;
const uint16_t *syscalls;
const size_t len;
};
hidden extern const struct Pledges kPledge[PROMISE_LEN_];
int sys_pledge_linux(unsigned long, enum PledgeMode, bool) hidden;
int ParsePromises(const char *, unsigned long *) hidden;
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */