Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * misc.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * This is a collection of several routines used to extract the kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * which includes KASLR relocation, decompression, ELF parsing, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * relocation processing. Additionally included are the screen and serial
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * output functions and related debugging support functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * puts by Nick Holloway 1993, better puts by Martin Mares 1995
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include "misc.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include "error.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include "pgtable.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include "../string.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include "../voffset.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <asm/bootparam_utils.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  * WARNING!!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  * This code is compiled with -fPIC and it is relocated dynamically at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  * run time, but no relocation processing is performed. This means that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  * it is not safe to place pointers in static structures.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) /* Macros used by the included decompressor code below. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define STATIC		static
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33)  * Provide definitions of memzero and memmove as some of the decompressors will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34)  * try to define their own functions if these are not defined as macros.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #define memzero(s, n)	memset((s), 0, (n))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #define memmove		memmove
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) /* Functions used by the included decompressor code below. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) void *memmove(void *dest, const void *src, size_t n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  * This is set up by the setup-routine at boot-time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) struct boot_params *boot_params;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) memptr free_mem_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) memptr free_mem_end_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) static char *vidmem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) static int vidport;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) static int lines, cols;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) #ifdef CONFIG_KERNEL_GZIP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) #include "../../../../lib/decompress_inflate.c"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) #ifdef CONFIG_KERNEL_BZIP2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) #include "../../../../lib/decompress_bunzip2.c"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) #ifdef CONFIG_KERNEL_LZMA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) #include "../../../../lib/decompress_unlzma.c"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) #ifdef CONFIG_KERNEL_XZ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) #include "../../../../lib/decompress_unxz.c"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) #ifdef CONFIG_KERNEL_LZO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) #include "../../../../lib/decompress_unlzo.c"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) #ifdef CONFIG_KERNEL_LZ4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) #include "../../../../lib/decompress_unlz4.c"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) #ifdef CONFIG_KERNEL_ZSTD
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) #include "../../../../lib/decompress_unzstd.c"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82)  * NOTE: When adding a new decompressor, please update the analysis in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83)  * ../header.S.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) static void scroll(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	memmove(vidmem, vidmem + cols * 2, (lines - 1) * cols * 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	for (i = (lines - 1) * cols * 2; i < lines * cols * 2; i += 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		vidmem[i] = ' ';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) #define XMTRDY          0x20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) #define TXR             0       /*  Transmit register (WRITE) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) #define LSR             5       /*  Line Status               */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) static void serial_putchar(int ch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	unsigned timeout = 0xffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	while ((inb(early_serial_base + LSR) & XMTRDY) == 0 && --timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		cpu_relax();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	outb(ch, early_serial_base + TXR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) void __putstr(const char *s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	int x, y, pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	char c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	if (early_serial_base) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		const char *str = s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		while (*str) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 			if (*str == '\n')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 				serial_putchar('\r');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 			serial_putchar(*str++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	if (lines == 0 || cols == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	x = boot_params->screen_info.orig_x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	y = boot_params->screen_info.orig_y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	while ((c = *s++) != '\0') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		if (c == '\n') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 			x = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 			if (++y >= lines) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 				scroll();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 				y--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 			vidmem[(x + cols * y) * 2] = c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 			if (++x >= cols) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 				x = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 				if (++y >= lines) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 					scroll();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 					y--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 				}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	boot_params->screen_info.orig_x = x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	boot_params->screen_info.orig_y = y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	pos = (x + cols * y) * 2;	/* Update cursor position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	outb(14, vidport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	outb(0xff & (pos >> 9), vidport+1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	outb(15, vidport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	outb(0xff & (pos >> 1), vidport+1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) void __puthex(unsigned long value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	char alpha[2] = "0";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	int bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	for (bits = sizeof(value) * 8 - 4; bits >= 0; bits -= 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		unsigned long digit = (value >> bits) & 0xf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		if (digit < 0xA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 			alpha[0] = '0' + digit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 			alpha[0] = 'a' + (digit - 0xA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		__putstr(alpha);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) #if CONFIG_X86_NEED_RELOCS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static void handle_relocations(void *output, unsigned long output_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 			       unsigned long virt_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	int *reloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	unsigned long delta, map, ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	unsigned long min_addr = (unsigned long)output;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	unsigned long max_addr = min_addr + (VO___bss_start - VO__text);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	 * Calculate the delta between where vmlinux was linked to load
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	 * and where it was actually loaded.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	delta = min_addr - LOAD_PHYSICAL_ADDR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	 * The kernel contains a table of relocation addresses. Those
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	 * addresses have the final load address of the kernel in virtual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	 * memory. We are currently working in the self map. So we need to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	 * create an adjustment for kernel memory addresses to the self map.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	 * This will involve subtracting out the base address of the kernel.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	map = delta - __START_KERNEL_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	 * 32-bit always performs relocations. 64-bit relocations are only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	 * needed if KASLR has chosen a different starting address offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	 * from __START_KERNEL_map.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	if (IS_ENABLED(CONFIG_X86_64))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		delta = virt_addr - LOAD_PHYSICAL_ADDR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	if (!delta) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		debug_putstr("No relocation needed... ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	debug_putstr("Performing relocations... ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	 * Process relocations: 32 bit relocations first then 64 bit after.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	 * Three sets of binary relocations are added to the end of the kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	 * before compression. Each relocation table entry is the kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	 * address of the location which needs to be updated stored as a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	 * 32-bit value which is sign extended to 64 bits.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	 * Format is:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	 * kernel bits...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	 * 0 - zero terminator for 64 bit relocations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	 * 64 bit relocation repeated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	 * 0 - zero terminator for inverse 32 bit relocations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	 * 32 bit inverse relocation repeated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	 * 0 - zero terminator for 32 bit relocations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	 * 32 bit relocation repeated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	 * So we work backwards from the end of the decompressed image.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	for (reloc = output + output_len - sizeof(*reloc); *reloc; reloc--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		long extended = *reloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		extended += map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		ptr = (unsigned long)extended;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		if (ptr < min_addr || ptr > max_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 			error("32-bit relocation outside of kernel!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		*(uint32_t *)ptr += delta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) #ifdef CONFIG_X86_64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	while (*--reloc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		long extended = *reloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		extended += map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		ptr = (unsigned long)extended;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		if (ptr < min_addr || ptr > max_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 			error("inverse 32-bit relocation outside of kernel!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 		*(int32_t *)ptr -= delta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	for (reloc--; *reloc; reloc--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		long extended = *reloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 		extended += map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		ptr = (unsigned long)extended;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 		if (ptr < min_addr || ptr > max_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 			error("64-bit relocation outside of kernel!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 		*(uint64_t *)ptr += delta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) static inline void handle_relocations(void *output, unsigned long output_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 				      unsigned long virt_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) static void parse_elf(void *output)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) #ifdef CONFIG_X86_64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	Elf64_Ehdr ehdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	Elf64_Phdr *phdrs, *phdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	Elf32_Ehdr ehdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	Elf32_Phdr *phdrs, *phdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	void *dest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	memcpy(&ehdr, output, sizeof(ehdr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	if (ehdr.e_ident[EI_MAG0] != ELFMAG0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	   ehdr.e_ident[EI_MAG1] != ELFMAG1 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	   ehdr.e_ident[EI_MAG2] != ELFMAG2 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	   ehdr.e_ident[EI_MAG3] != ELFMAG3) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		error("Kernel is not a valid ELF file");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	debug_putstr("Parsing ELF... ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	phdrs = malloc(sizeof(*phdrs) * ehdr.e_phnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	if (!phdrs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 		error("Failed to allocate space for phdrs");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	memcpy(phdrs, output + ehdr.e_phoff, sizeof(*phdrs) * ehdr.e_phnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	for (i = 0; i < ehdr.e_phnum; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		phdr = &phdrs[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 		switch (phdr->p_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		case PT_LOAD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) #ifdef CONFIG_X86_64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 			if ((phdr->p_align % 0x200000) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 				error("Alignment of LOAD segment isn't multiple of 2MB");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) #ifdef CONFIG_RELOCATABLE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 			dest = output;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 			dest += (phdr->p_paddr - LOAD_PHYSICAL_ADDR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 			dest = (void *)(phdr->p_paddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 			memmove(dest, output + phdr->p_offset, phdr->p_filesz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 		default: /* Ignore other PT_* */ break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	free(phdrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)  * The compressed kernel image (ZO), has been moved so that its position
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)  * is against the end of the buffer used to hold the uncompressed kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)  * image (VO) and the execution environment (.bss, .brk), which makes sure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328)  * there is room to do the in-place decompression. (See header.S for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)  * calculations.)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331)  *                             |-----compressed kernel image------|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)  *                             V                                  V
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)  * 0                       extract_offset                      +INIT_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)  * |-----------|---------------|-------------------------|--------|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)  *             |               |                         |        |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)  *           VO__text      startup_32 of ZO          VO__end    ZO__end
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)  *             ^                                         ^
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)  *             |-------uncompressed kernel image---------|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) asmlinkage __visible void *extract_kernel(void *rmode, memptr heap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 				  unsigned char *input_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 				  unsigned long input_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 				  unsigned char *output,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 				  unsigned long output_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	const unsigned long kernel_total_size = VO__end - VO__text;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	unsigned long virt_addr = LOAD_PHYSICAL_ADDR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	unsigned long needed_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	/* Retain x86 boot parameters pointer passed from startup_32/64. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	boot_params = rmode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	/* Clear flags intended for solely in-kernel use. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	boot_params->hdr.loadflags &= ~KASLR_FLAG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	sanitize_boot_params(boot_params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	if (boot_params->screen_info.orig_video_mode == 7) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 		vidmem = (char *) 0xb0000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 		vidport = 0x3b4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 		vidmem = (char *) 0xb8000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 		vidport = 0x3d4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	lines = boot_params->screen_info.orig_video_lines;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	cols = boot_params->screen_info.orig_video_cols;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 	console_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	 * Save RSDP address for later use. Have this after console_init()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	 * so that early debugging output from the RSDP parsing code can be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 	 * collected.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	boot_params->acpi_rsdp_addr = get_rsdp_addr();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	debug_putstr("early console in extract_kernel\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 	free_mem_ptr     = heap;	/* Heap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 	free_mem_end_ptr = heap + BOOT_HEAP_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 	 * The memory hole needed for the kernel is the larger of either
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 	 * the entire decompressed kernel plus relocation table, or the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 	 * entire decompressed kernel plus .bss and .brk sections.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 	 * On X86_64, the memory is mapped with PMD pages. Round the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 	 * size up so that the full extent of PMD pages mapped is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 	 * included in the check against the valid memory table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 	 * entries. This ensures the full mapped area is usable RAM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 	 * and doesn't include any reserved areas.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 	needed_size = max(output_len, kernel_total_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) #ifdef CONFIG_X86_64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 	needed_size = ALIGN(needed_size, MIN_KERNEL_ALIGN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 	/* Report initial kernel position details. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 	debug_putaddr(input_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 	debug_putaddr(input_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 	debug_putaddr(output);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 	debug_putaddr(output_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 	debug_putaddr(kernel_total_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 	debug_putaddr(needed_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) #ifdef CONFIG_X86_64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 	/* Report address of 32-bit trampoline */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 	debug_putaddr(trampoline_32bit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 	choose_random_location((unsigned long)input_data, input_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 				(unsigned long *)&output,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 				needed_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 				&virt_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 	/* Validate memory location choices. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 	if ((unsigned long)output & (MIN_KERNEL_ALIGN - 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 		error("Destination physical address inappropriately aligned");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 	if (virt_addr & (MIN_KERNEL_ALIGN - 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 		error("Destination virtual address inappropriately aligned");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) #ifdef CONFIG_X86_64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 	if (heap > 0x3fffffffffffUL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 		error("Destination address too large");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 	if (virt_addr + max(output_len, kernel_total_size) > KERNEL_IMAGE_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 		error("Destination virtual address is beyond the kernel mapping area");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 	if (heap > ((-__PAGE_OFFSET-(128<<20)-1) & 0x7fffffff))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 		error("Destination address too large");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) #ifndef CONFIG_RELOCATABLE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 	if ((unsigned long)output != LOAD_PHYSICAL_ADDR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 		error("Destination address does not match LOAD_PHYSICAL_ADDR");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 	if (virt_addr != LOAD_PHYSICAL_ADDR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 		error("Destination virtual address changed when not relocatable");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 	debug_putstr("\nDecompressing Linux... ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 	__decompress(input_data, input_len, NULL, NULL, output, output_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 			NULL, error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 	parse_elf(output);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 	handle_relocations(output, output_len, virt_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 	debug_putstr("done.\nBooting the kernel.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 	 * Flush GHCB from cache and map it encrypted again when running as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 	 * SEV-ES guest.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 	sev_es_shutdown_ghcb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 	return output;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) void fortify_panic(const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 	error("detected buffer overflow");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) }