diff options
| author | Chia-I Wu <olv@lunarg.com> | 2010-12-24 15:06:41 +0800 |
|---|---|---|
| committer | Chia-I Wu <olv@lunarg.com> | 2010-12-24 17:33:49 +0800 |
| commit | e6a7ef3ca6d7f1843a7ea3f873c8f16fe9efc48e (patch) | |
| tree | 2d7e3bc66b180e579967357be6867f0371cd53b4 /src/mapi/mapi/entry_x86-64_tls.h | |
| parent | 897bff67734ec9ab213191386cdf09ddd051aebb (diff) | |
mapi: Add and use entry_get_public.
Given a dispatch slot, entry_get_public returns the address of the
corresponding public entry point. There may be more than one of them.
But since they are all equivalent, it is fine to return any one of them.
With entry_get_public, the address of any public entry point can be
calculated at runtime when an assembly dispatcher is used. There is no
need to have a mapping table in such case. This omits the unnecessary
relocations from the binary.
Diffstat (limited to 'src/mapi/mapi/entry_x86-64_tls.h')
| -rw-r--r-- | src/mapi/mapi/entry_x86-64_tls.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/mapi/mapi/entry_x86-64_tls.h b/src/mapi/mapi/entry_x86-64_tls.h index 2c02933802..d14bf1c394 100644 --- a/src/mapi/mapi/entry_x86-64_tls.h +++ b/src/mapi/mapi/entry_x86-64_tls.h @@ -49,6 +49,9 @@ __asm__("x86_64_current_tls:\n\t" "movq u_current_table@GOTTPOFF(%rip), %rax\n\t" "ret"); +__asm__(".balign 32\n" + "x86_64_entry_start:"); + #define STUB_ASM_ENTRY(func) \ ".globl " func "\n" \ ".type " func ", @function\n" \ @@ -71,6 +74,13 @@ entry_patch_public(void) { } +mapi_func +entry_get_public(int slot) +{ + extern char x86_64_entry_start[]; + return (mapi_func) (x86_64_entry_start + slot * 32); +} + void entry_patch(mapi_func entry, int slot) { |