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Support malloc() on bare metal

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Your Actually Portable Executables now contains a simple virtual memory
that works similarly to the Linux Kernel in the sense that it maps your
physical memory to negative addresses. This is needed to support mmap()
and malloc(). This functionality has zero code size impact. For example
the MODE=tiny LIFE.COM executable is still only 12KB in size.

The APE bootloader code has also been simplified to improve readibility
and further elevate the elegance by which we're able to support so many
platforms thereby enhancing verifiability so that we may engender trust
in this bootloading process.
This commit is contained in:
Justine Tunney 2021-02-23 20:23:19 -08:00
parent ac3b1dfb21
commit edd9297eba
89 changed files with 900 additions and 1417 deletions
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2
libc/sysv/syscalls.sh
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@ -44,7 +44,7 @@ scall __sys_lstat 0x1b90280282154006 globl hidden # needs __stat2linux(); block
scall sys_poll 0x0d10fc0d120e6007 globl hidden
scall sys_ppoll 0xfff06d221ffff10f globl hidden # consider INTON/INTOFF tutorial in examples/unbourne.c
scall sys_lseek 0x0c70c71de20c7008 globl hidden # netbsd+openbsd:evilpad
scall sys_mmap 0x0c50c51dd20c5009 globl hidden # netbsd+openbsd:pad
scall __sys_mmap 0x0c50c51dd20c5009 globl hidden # netbsd+openbsd:pad
scall sys_msync 0x115100041204101a globl hidden
scall sys_mprotect 0x04a04a04a204a00a globl hidden
scall sys_munmap 0x049049049204900b globl hidden