| /* ----------------------------------------------------------------------- * |
| * |
| * Copyright 2007-2009 H. Peter Anvin - All Rights Reserved |
| * Copyright 2009 Intel Corporation; author: H. Peter Anvin |
| * |
| * Permission is hereby granted, free of charge, to any person |
| * obtaining a copy of this software and associated documentation |
| * files (the "Software"), to deal in the Software without |
| * restriction, including without limitation the rights to use, |
| * copy, modify, merge, publish, distribute, sublicense, and/or |
| * sell copies of the Software, and to permit persons to whom |
| * the Software is furnished to do so, subject to the following |
| * conditions: |
| * |
| * The above copyright notice and this permission notice shall |
| * be included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES |
| * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
| * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * ----------------------------------------------------------------------- */ |
| |
| /* |
| * shuffle_pm.c |
| * |
| * Shuffle and boot to protected mode code |
| */ |
| |
| #include <inttypes.h> |
| #include <syslinux/movebits.h> |
| #include <syslinux/bootpm.h> |
| |
| int syslinux_shuffle_boot_pm(struct syslinux_movelist *fraglist, |
| struct syslinux_memmap *memmap, |
| uint16_t bootflags, struct syslinux_pm_regs *regs) |
| { |
| uint8_t handoff_code[9 * 5], *p; |
| const uint32_t *rp; |
| int i, rv; |
| struct syslinux_memmap *tmap; |
| addr_t regstub, stublen; |
| |
| tmap = syslinux_target_memmap(fraglist, memmap); |
| if (!tmap) |
| return -1; |
| |
| regstub = 0x800; /* Locate anywhere above this point */ |
| stublen = sizeof handoff_code; |
| rv = syslinux_memmap_find_type(tmap, SMT_FREE, ®stub, &stublen, 1); |
| syslinux_free_memmap(tmap); |
| if (rv) |
| return -1; |
| |
| /* Build register-setting stub */ |
| p = handoff_code; |
| rp = (const uint32_t *)regs; |
| for (i = 0; i < 8; i++) { |
| *p = 0xb8 + i; /* MOV gpr,imm32 */ |
| *(uint32_t *) (p + 1) = *rp++; |
| p += 5; |
| } |
| *p = 0xe9; /* JMP */ |
| *(uint32_t *) (p + 1) = regs->eip - regstub - sizeof handoff_code; |
| |
| /* Add register-setting stub to shuffle list */ |
| if (syslinux_add_movelist(&fraglist, regstub, (addr_t) handoff_code, |
| sizeof handoff_code)) |
| return -1; |
| |
| return syslinux_do_shuffle(fraglist, memmap, regstub, 1, bootflags); |
| } |