| OLD | NEW |
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| 1 /* | 1 /* |
| 2 * Copyright 2009, Google Inc. | 2 * Copyright 2009, Google Inc. |
| 3 * All rights reserved. | 3 * All rights reserved. |
| 4 * | 4 * |
| 5 * Redistribution and use in source and binary forms, with or without | 5 * Redistribution and use in source and binary forms, with or without |
| 6 * modification, are permitted provided that the following conditions are | 6 * modification, are permitted provided that the following conditions are |
| 7 * met: | 7 * met: |
| 8 * | 8 * |
| 9 * * Redistributions of source code must retain the above copyright | 9 * * Redistributions of source code must retain the above copyright |
| 10 * notice, this list of conditions and the following disclaimer. | 10 * notice, this list of conditions and the following disclaimer. |
| (...skipping 22 matching lines...) Expand all Loading... |
| 33 #include "native_client/src/trusted/service_runtime/include/bits/nacl_syscalls.h
" | 33 #include "native_client/src/trusted/service_runtime/include/bits/nacl_syscalls.h
" |
| 34 | 34 |
| 35 /* | 35 /* |
| 36 * Assembly code template. This is linked into the service runtime | 36 * Assembly code template. This is linked into the service runtime |
| 37 * but is unused as code -- it is used as data to be patched into | 37 * but is unused as code -- it is used as data to be patched into |
| 38 * a NaCl app's address space as a "hidden" part of its trampoline | 38 * a NaCl app's address space as a "hidden" part of its trampoline |
| 39 * region. This code takes the last slot in trampoline region, and it is | 39 * region. This code takes the last slot in trampoline region, and it is |
| 40 * loaded by NaClLoadSpringboard() (sel_ldr.c). | 40 * loaded by NaClLoadSpringboard() (sel_ldr.c). |
| 41 */ | 41 */ |
| 42 | 42 |
| 43 .globl IDENTIFIER(NaCl_springboard) | |
| 44 .globl IDENTIFIER(NaCl_springboard_end) | |
| 45 | |
| 46 /* | 43 /* |
| 47 * NaCl_springboard is used for syscall return and any time we want | 44 * NaCl_springboard is used for syscall return and any time we want |
| 48 * to do an upcall into NaCl application. | 45 * to do an upcall into NaCl application. |
| 49 */ | 46 */ |
| 50 | 47 |
| 48 .globl IDENTIFIER(NaCl_springboard) |
| 49 HIDDEN(NaCl_springboard) |
| 51 IDENTIFIER(NaCl_springboard): | 50 IDENTIFIER(NaCl_springboard): |
| 52 /* | 51 /* |
| 53 * r0 -- syscall return value | 52 * r0 -- syscall return value |
| 54 * r1 -- new pc | 53 * r1 -- new pc |
| 55 * == user srack == | 54 * == user srack == |
| 56 * top | 55 * top |
| 57 * ===== | 56 * ===== |
| 58 * arg 1 | 57 * arg 1 |
| 59 * arg 2 | 58 * arg 2 |
| 60 * ..... | 59 * ..... |
| 61 * arg N | 60 * arg N |
| 62 */ | 61 */ |
| 63 | 62 |
| 64 /* | 63 /* |
| 65 * This instruction guards springboard from unauthorized execution. | 64 * This instruction guards springboard from unauthorized execution. |
| 66 * Service runtime jumps to the instruction following the NACL_HALT one. If | 65 * Service runtime jumps to the instruction following the NACL_HALT one. If |
| 67 * any other code tries to reach springboard without performing a jump it will | 66 * any other code tries to reach springboard without performing a jump it will |
| 68 * be halted by the NACL_HALT | 67 * be halted by the NACL_HALT |
| 69 */ | 68 */ |
| 70 NACL_HALT | 69 NACL_HALT |
| 71 | 70 |
| 72 add sp, #16 /* popping four arguments placed by trampoline code */ | 71 add sp, #16 /* popping four arguments placed by trampoline code */ |
| 73 #if !defined(DANGEROUS_DEBUG_MODE_DISABLE_INNER_SANDBOX) | 72 #if !defined(DANGEROUS_DEBUG_MODE_DISABLE_INNER_SANDBOX) |
| 74 bic r1, r1, #0xF000000F | 73 bic r1, r1, #0xF000000F |
| 75 #endif | 74 #endif |
| 76 bx r1 | 75 bx r1 |
| 76 .globl IDENTIFIER(NaCl_springboard_end) |
| 77 HIDDEN(NaCl_springboard_end) |
| 77 IDENTIFIER(NaCl_springboard_end): | 78 IDENTIFIER(NaCl_springboard_end): |
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Chromium Code Reviews
Issue 293009:
Mark assembly routines that don't need to be exported as hidden (Closed)
Base URL: http://nativeclient.googlecode.com/svn/trunk/src/native_client/