cosmopolitan/libc/runtime/mman.internal.h

#ifndef COSMOPOLITAN_LIBC_RUNTIME_MMAN_H_
#define COSMOPOLITAN_LIBC_RUNTIME_MMAN_H_
#include "libc/runtime/e820.internal.h"
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_

struct mman {
  int64_t pdp;                           /* 0x0500 */
  int32_t pdpi;                          /* 0x0508 */
  int32_t e820n;                         /* 0x050c */
  struct SmapEntry e820[256];            /* 0x0510 */
  char pc_drive_base_table[11];          /* 0x1d10 */
  unsigned char pc_drive_type;           /* 0x1d1b */
  unsigned char pc_drive_last_sector;    /* 0x1d1c */
  unsigned short pc_drive_last_cylinder; /* 0x1d1d */
  unsigned char pc_drives_attached;      /* 0x1d1f */
  unsigned char pc_drive_last_head;      /* 0x1d20 */
  unsigned char pc_drive;                /* 0x1d21 */
  char bad_idt[6];                       /* 0x1d22 */
};

COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_RUNTIME_MMAN_H_ */
Support malloc() on bare metal 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. 2021-02-24 04:23:19 +00:00			`#ifndef COSMOPOLITAN_LIBC_RUNTIME_MMAN_H_`
			`#define COSMOPOLITAN_LIBC_RUNTIME_MMAN_H_`
			`#include "libc/runtime/e820.internal.h"`
			`#if !(__ASSEMBLER__ + __LINKER__ + 0)`
			`COSMOPOLITAN_C_START_`

			`struct mman {`
			`int64_t pdp; /* 0x0500 */`
			`int32_t pdpi; /* 0x0508 */`
[WIP] Get bare metal working outside of an emulator (#609) You can now run bare metal on bare metal! * Fix handling of int 0x15 eax = 0xe820 memory map * Fix some issues in initial page table creation * hello4.com now works outside emulators * Ensure area for identity page tables are zeroed first * Simplify logic for creating page table entries, this partly reverts 577c0f6226fde54a0018a8ebe7ff0ddbd0e16207 * Add degenerate MBR partition entry, to ease testing Co-authored-by: tkchia <tkchia-cosmo@gmx.com> 2022-09-13 09:01:49 +00:00			`int32_t e820n; /* 0x050c */`
Support malloc() on bare metal 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. 2021-02-24 04:23:19 +00:00			`struct SmapEntry e820[256]; /* 0x0510 */`
[WIP] Get bare metal working outside of an emulator (#609) You can now run bare metal on bare metal! * Fix handling of int 0x15 eax = 0xe820 memory map * Fix some issues in initial page table creation * hello4.com now works outside emulators * Ensure area for identity page tables are zeroed first * Simplify logic for creating page table entries, this partly reverts 577c0f6226fde54a0018a8ebe7ff0ddbd0e16207 * Add degenerate MBR partition entry, to ease testing Co-authored-by: tkchia <tkchia-cosmo@gmx.com> 2022-09-13 09:01:49 +00:00			`char pc_drive_base_table[11]; /* 0x1d10 */`
			`unsigned char pc_drive_type; /* 0x1d1b */`
			`unsigned char pc_drive_last_sector; /* 0x1d1c */`
			`unsigned short pc_drive_last_cylinder; /* 0x1d1d */`
			`unsigned char pc_drives_attached; /* 0x1d1f */`
			`unsigned char pc_drive_last_head; /* 0x1d20 */`
			`unsigned char pc_drive; /* 0x1d21 */`
			`char bad_idt[6]; /* 0x1d22 */`
Support malloc() on bare metal 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. 2021-02-24 04:23:19 +00:00			`};`

			`COSMOPOLITAN_C_END_`
			`#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */`
			`#endif /* COSMOPOLITAN_LIBC_RUNTIME_MMAN_H_ */`