| // Copyright (C) 2015 The Android Open Source Project |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| .macro store_reg x, y |
| movl \x, \y(%edi) |
| .endm |
| |
| // void BionicInternalSaveRegContext(uint32_t[15]) |
| // Saves register context necessary for traversing the stack in a minidump. |
| .global BionicInternalSaveRegContext |
| .type BionicInternalSaveRegContext, @function |
| BionicInternalSaveRegContext: |
| .cfi_startproc |
| pushl %edi |
| .cfi_adjust_cfa_offset 4 |
| mov 8(%esp), %edi |
| |
| // The ordering matches the one specified in ucontext.h. |
| // We're not efficient here because first four registers are segment registers. |
| store_reg %esi, 0x14 |
| store_reg %ebp, 0x18 |
| store_reg %ebx, 0x20 |
| store_reg %edx, 0x24 |
| store_reg %ecx, 0x28 |
| store_reg %eax, 0x2c |
| |
| // edi |
| mov 0(%esp), %eax |
| store_reg %eax, 0x10 |
| |
| // Store caller's ESP. |
| // Hmm... really? |
| leal 8(%esp), %eax |
| store_reg %eax, 0x1c |
| |
| // Store caller's EIP. |
| movl 4(%esp), %eax |
| store_reg %eax, 0x38 |
| |
| popl %edi |
| .cfi_adjust_cfa_offset -4 |
| ret |
| |
| .cfi_endproc |
| .size BionicInternalSaveRegContext, . - BionicInternalSaveRegContext |
| |
| .section .note.GNU-stack, "", @progbits |
