Mercurial > pub > dyncall > dyncall
view dyncallback/dyncall_thunk_ppc64.c @ 166:d5705f226298
- added portasm support for adding .section .note.GNU-stack "hints" marking generated .o files from assembly files as not needing an executable stack
* needed to be done manually in assembly files, in contrast to C translation units where gcc adds such hints automatically
* this is for security, and better/easier integration of dyncall into other projects and builds, as dyncall doesn't need an executable stack
* thanks to Thorsten Behrens for bringing this up to our intention and providing a first analysis
* currently only done on Linux, but will be added across other platforms (where applicable) after some testing
author | cslag |
---|---|
date | Thu, 05 Jan 2017 11:07:29 +0100 |
parents | bbefb8b8e74c |
children |
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/* Package: dyncall Library: dyncallback File: dyncallback/dyncall_thunk_ppc64.c Description: Thunk - Implementation for ppc64 License: Copyright (c) 2014-2015 Masanori Mitsugi <mitsugi@linux.vnet.ibm.com> Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include "dyncall_thunk.h" #define HIST16(x) (unsigned short)((((unsigned long)(x))>>48UL) & 0xffff) #define HIER16(x) (unsigned short)((((unsigned long)(x))>>32UL) & 0xffff) #define HI16(x) (unsigned short)((((unsigned long)(x))>>16UL) & 0xffff) #define LO16(x) (unsigned short)( ((unsigned long)(x)) & 0xffff) void dcbInitThunk(DCThunk* p, void (*entry)()) { #if DC__ABI_PPC64_ELF_V != 2 /* ppc64 thunk code: (v1) oris r11, r2, HI16(p) ori r11,r11, LO16(p) ld r12,48(r11) ld r2,56(r11) mtctr r12 bctr */ p->thunk_entry = (void *)&(p->code_load_hi); p->toc_thunk = ((long)(p->thunk_entry) & 0xffffffff00000000UL); p->code_load_hi = 0x644bU; /* oris r11, r2, HI16(p) */ p->addr_self_hi = HI16(p); p->code_load_lo = 0x616bU; /* ori r11,r11, LO16(p) */ p->addr_self_lo = LO16(p); p->code_jump[0] = 0xe98b0030U; /* ld r12,48(r11) */ p->code_jump[1] = 0xe84b0038U; /* ld r2,56(r11) */ p->code_jump[2] = 0x7d8903a6U; /* mtclr r12 */ p->code_jump[3] = 0x4e800420U; /* bctr */ p->addr_entry = (void *)*((long *)entry); p->toc_entry = *((long *)(entry + 8)); #else /* ppc64 thunk code: (v2) lis r11, HIST16(p) ori r11,r11, HIER16(p) rldicr r11,r11,32,31 oris r11,r11, HI16(p) ori r11,r11, LO16(p) ld r12,40(r11) mtctr r12 bctr */ p->code_load_hist = 0x3d60U; /* lis r11,HIST16(p) */ p->addr_self_hist = HIST16(p); p->code_load_hier = 0x616bU; /* ori r11,r11, HIER16(p) */ p->addr_self_hier = HIER16(p); p->code_rot = 0x796b07c6U; /* rldicr r11,r11,32,31 */ p->code_load_hi = 0x656bU; /* oris r11,r11, HI16(p) */ p->addr_self_hi = HI16(p); p->code_load_lo = 0x616bU; /* ori r11,r11, LO16(p) */ p->addr_self_lo = LO16(p); p->code_jump[0] = 0xe98b0028U; /* ld r12,40(r11) */ p->code_jump[1] = 0x7d8903a6U; /* mtclr r12 */ p->code_jump[2] = 0x4e800420U; /* bctr */ p->addr_entry = (void *)(entry); #endif }