motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-02 15:23:53 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

tcg: Add extended GETPC mechanism for MMU helpers with ldst optimization

Browse source 
Add GETPC_EXT which is used by MMU helpers to selectively calculate the code
address of accessing guest memory when called from a qemu_ld/st optimized code
or a C function. Currently, it supports only i386 and x86-64 hosts.

Signed-off-by: Yeongkyoon Lee <yeongkyoon.lee@samsung.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Yeongkyoon Lee 2012-10-31 16:04:24 +09:00 • committed by Blue Swirl
parent 32761257c0
commit fdbb84d133
3 changed files with 55 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

11
exec.c
View file

@ -1390,6 +1390,17 @@ void tb_link_page(TranslationBlock *tb,
mmap_unlock();
}
#if defined(CONFIG_QEMU_LDST_OPTIMIZATION) && defined(CONFIG_SOFTMMU)
/* check whether the given addr is in TCG generated code buffer or not */
bool is_tcg_gen_code(uintptr_t tc_ptr)
{
/* This can be called during code generation, code_gen_buffer_max_size
is used instead of code_gen_ptr for upper boundary checking */
return (tc_ptr >= (uintptr_t)code_gen_buffer &&
tc_ptr < (uintptr_t)(code_gen_buffer + code_gen_buffer_max_size));
}
#endif
/* find the TB 'tb' such that tb[0].tc_ptr <= tc_ptr <
tb[1].tc_ptr. Return NULL if not found */
TranslationBlock *tb_find_pc(uintptr_t tc_ptr)