diff options
Diffstat (limited to 'fw_cfg.c')
| -rw-r--r-- | fw_cfg.c | 13 |
1 files changed, 8 insertions, 5 deletions
@@ -269,6 +269,7 @@ void boot_from_fwcfg(void) { struct linuxboot_args args; uint32_t kernel_size; + enum { HEADER_PEEK_SIZE = 8192 }; fw_cfg_select(FW_CFG_CMDLINE_SIZE); args.cmdline_size = fw_cfg_readl_le(); @@ -282,15 +283,17 @@ void boot_from_fwcfg(void) kernel_size = fw_cfg_readl_le(); fw_cfg_select(FW_CFG_SETUP_SIZE); args.vmlinuz_size = kernel_size + fw_cfg_readl_le(); + fw_cfg_select(FW_CFG_SETUP_ADDR); + args.setup_addr = (void *)fw_cfg_readl_le(); if (!args.vmlinuz_size) return; fw_cfg_select(FW_CFG_SETUP_DATA); - fw_cfg_read(args.header, sizeof(args.header)); + fw_cfg_read(args.setup_addr, HEADER_PEEK_SIZE); if (!parse_bzimage(&args)) { - uint8_t *header = args.header; + uint8_t *header = args.setup_addr; if (ldl_p(header) == 0x464c457f) /* ELF magic */ boot_pvh_from_fw_cfg(); @@ -298,9 +301,9 @@ void boot_from_fwcfg(void) } /* SETUP_DATA already selected */ - if (args.setup_size > sizeof(args.header)) - fw_cfg_read(args.setup_addr + sizeof(args.header), - args.setup_size - sizeof(args.header)); + if (args.setup_size > HEADER_PEEK_SIZE) + fw_cfg_read(args.setup_addr + HEADER_PEEK_SIZE, + args.setup_size - HEADER_PEEK_SIZE); fw_cfg_select(FW_CFG_KERNEL_DATA); fw_cfg_read_entry(FW_CFG_KERNEL_DATA, args.kernel_addr, kernel_size); |