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d60fa42e8b
The current elf loader uses too much memory. For example, I have a executable with a bss section of 400 MB and I set the ram size to 512 MB. Qemu uses about 780MB of RAM (which is fine), but there's a peak at 1.6 GB during initialization (this is not fine). This patch fixes two things: 1) do not allocate each elf program twice. 2) do not allocate memory for areas that are only zeros. For this we need a new field in Rom: "datasize" which is the size of the allocated data. If datasize is less than romsize, it means that the area from datasize to romsize is filled with zeros. Signed-off-by: Fabien Chouteau <chouteau@adacore.com> Signed-off-by: Alexander Graf <agraf@suse.de>
53 lines
1.9 KiB
C
53 lines
1.9 KiB
C
#ifndef LOADER_H
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#define LOADER_H
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#include "qapi/qmp/qdict.h"
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/* loader.c */
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int get_image_size(const char *filename);
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int load_image(const char *filename, uint8_t *addr); /* deprecated */
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int load_image_targphys(const char *filename, hwaddr,
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uint64_t max_sz);
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int load_elf(const char *filename, uint64_t (*translate_fn)(void *, uint64_t),
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void *translate_opaque, uint64_t *pentry, uint64_t *lowaddr,
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uint64_t *highaddr, int big_endian, int elf_machine,
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int clear_lsb);
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int load_aout(const char *filename, hwaddr addr, int max_sz,
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int bswap_needed, hwaddr target_page_size);
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int load_uimage(const char *filename, hwaddr *ep,
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hwaddr *loadaddr, int *is_linux);
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ssize_t read_targphys(const char *name,
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int fd, hwaddr dst_addr, size_t nbytes);
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void pstrcpy_targphys(const char *name,
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hwaddr dest, int buf_size,
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const char *source);
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int rom_add_file(const char *file, const char *fw_dir,
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hwaddr addr, int32_t bootindex);
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int rom_add_blob(const char *name, const void *blob, size_t len,
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hwaddr addr);
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int rom_add_elf_program(const char *name, void *data, size_t datasize,
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size_t romsize, hwaddr addr);
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int rom_load_all(void);
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void rom_set_fw(void *f);
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int rom_copy(uint8_t *dest, hwaddr addr, size_t size);
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void *rom_ptr(hwaddr addr);
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void do_info_roms(Monitor *mon, const QDict *qdict);
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#define rom_add_file_fixed(_f, _a, _i) \
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rom_add_file(_f, NULL, _a, _i)
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#define rom_add_blob_fixed(_f, _b, _l, _a) \
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rom_add_blob(_f, _b, _l, _a)
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#define PC_ROM_MIN_VGA 0xc0000
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#define PC_ROM_MIN_OPTION 0xc8000
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#define PC_ROM_MAX 0xe0000
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#define PC_ROM_ALIGN 0x800
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#define PC_ROM_SIZE (PC_ROM_MAX - PC_ROM_MIN_VGA)
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int rom_add_vga(const char *file);
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int rom_add_option(const char *file, int32_t bootindex);
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#endif
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