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sparc support - hack to fix case where real_host_page_size < TARGET_PAGE_SIZE (typically sparc target case)

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@389 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2003-09-30 20:58:32 +00:00
parent 93ac68bca5
commit 853d6f7a83
1 changed files with 42 additions and 7 deletions
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49
linux-user/elfload.c
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@ -83,6 +83,27 @@ static inline void init_thread(struct target_pt_regs *regs, struct image_info *i
#endif
#ifdef TARGET_SPARC
#define ELF_START_MMAP 0x80000000
#define elf_check_arch(x) ( (x) == EM_SPARC )
#define ELF_CLASS ELFCLASS32
#define ELF_DATA ELFDATA2MSB
#define ELF_ARCH EM_SPARC
/*XXX*/
#define ELF_PLAT_INIT(_r)
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
{
regs->u_regs[0] = infop->entry;
regs->u_regs[1] = infop->start_stack;
}
#endif
#include "elf.h"
/*
@ -456,18 +477,32 @@ static void set_brk(unsigned long start, unsigned long end)
}
/* We need to explicitly zero any fractional pages
after the data section (i.e. bss). This would
contain the junk from the file that should not
be in memory */
/* We need to explicitly zero any fractional pages after the data
section (i.e. bss). This would contain the junk from the file that
should not be in memory. */
static void padzero(unsigned long elf_bss)
{
unsigned long nbyte;
char * fpnt;
nbyte = elf_bss & (host_page_size-1); /* was TARGET_PAGE_SIZE - JRP */
/* XXX: this is really a hack : if the real host page size is
smaller than the target page size, some pages after the end
of the file may not be mapped. A better fix would be to
patch target_mmap(), but it is more complicated as the file
size must be known */
if (real_host_page_size < host_page_size) {
unsigned long end_addr, end_addr1;
end_addr1 = (elf_bss + real_host_page_size - 1) &
~(real_host_page_size - 1);
end_addr = HOST_PAGE_ALIGN(elf_bss);
if (end_addr1 < end_addr) {
mmap((void *)end_addr1, end_addr - end_addr1,
PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
}
}
nbyte = elf_bss & (host_page_size-1);
if (nbyte) {
nbyte = host_page_size - nbyte;
fpnt = (char *) elf_bss;