falso
/
qemu-irix
mirror of https://github.com/n64decomp/qemu-irix.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

fix multiboot loading if load_end_addr == 0 

The previous multiboot load code did not treat the case where
load_end_addr was 0 specially.  The multiboot specification says the
following:
 * load_end_addr
   Contains the physical address of the end of the data segment.
   (load_end_addr - load_addr) specifies how much data to load. This
   implies that the text and data segments must be consecutive in the
   OS image; this is true for existing a.out executable formats. If
   this field is zero, the boot loader assumes that the text and data
   segments occupy the whole OS image file.

Signed-off-by: Scott Moser <smoser@ubuntu.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Scott Moser 2012-03-26 15:27:00 -04:00 committed by Anthony Liguori
parent 8294a64d7f
commit 9c3a596a03
1 changed files with 9 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
hw/multiboot.c
View File

@ -202,10 +202,16 @@ int load_multiboot(void *fw_cfg,
uint32_t mh_bss_end_addr = ldl_p(header+i+24); uint32_t mh_bss_end_addr = ldl_p(header+i+24);
mh_load_addr = ldl_p(header+i+16); mh_load_addr = ldl_p(header+i+16);
uint32_t mb_kernel_text_offset = i - (mh_header_addr - mh_load_addr); uint32_t mb_kernel_text_offset = i - (mh_header_addr - mh_load_addr);
uint32_t mb_load_size = mh_load_end_addr - mh_load_addr; uint32_t mb_load_size = 0;
mh_entry_addr = ldl_p(header+i+28); mh_entry_addr = ldl_p(header+i+28);
mb_kernel_size = mh_bss_end_addr - mh_load_addr;
if (mh_load_end_addr) {
mb_kernel_size = mh_bss_end_addr - mh_load_addr;
mb_load_size = mh_load_end_addr - mh_load_addr;
} else {
mb_kernel_size = kernel_file_size - mb_kernel_text_offset;
mb_load_size = mb_kernel_size;
}
/* Valid if mh_flags sets MULTIBOOT_HEADER_HAS_VBE. /* Valid if mh_flags sets MULTIBOOT_HEADER_HAS_VBE.
uint32_t mh_mode_type = ldl_p(header+i+32); uint32_t mh_mode_type = ldl_p(header+i+32);