064360e667
libgcc for boot environment isn't always present and compatible. libgcc is often absent if endianness or bit-size at boot is different from running OS. libgcc may use optimised opcodes that aren't available on boot time. So instead of relying on libgcc shipped with the compiler, supply the functions in GRUB directly. Tests are present to ensure that those replacement functions behave the way compiler expects them to.
130 lines
3.9 KiB
ArmAsm
130 lines
3.9 KiB
ArmAsm
/*
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* Special support for eabi and SVR4
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*
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* Copyright (C) 1995-2014 Free Software Foundation, Inc.
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* Written By Michael Meissner
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* 64-bit support written by David Edelsohn
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*
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* This file is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 3, or (at your option) any
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* later version.
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*
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* This file is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* Under Section 7 of GPL version 3, you are granted additional
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* permissions described in the GCC Runtime Library Exception, version
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* 3.1, as published by the Free Software Foundation.
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*
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* You should have received a copy of the GNU General Public License and
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* a copy of the GCC Runtime Library Exception along with this program;
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* see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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/* Do any initializations needed for the eabi environment */
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#include <grub/symbol.h>
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#include <grub/dl.h>
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.section ".text"
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#define CFI_RESTORE(reg) .cfi_restore reg
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#define CFI_OFFSET(reg, off) .cfi_offset reg, off
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#define CFI_DEF_CFA_REGISTER(reg) .cfi_def_cfa_register reg
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#define CFI_STARTPROC .cfi_startproc
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#define CFI_ENDPROC .cfi_endproc
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/* Routines for restoring integer registers, called by the compiler. */
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/* Called with r11 pointing to the stack header word of the caller of the */
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/* function, just beyond the end of the integer restore area. */
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CFI_STARTPROC
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CFI_DEF_CFA_REGISTER (11)
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CFI_OFFSET (65, 4)
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CFI_OFFSET (14, -72)
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CFI_OFFSET (15, -68)
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CFI_OFFSET (16, -64)
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CFI_OFFSET (17, -60)
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CFI_OFFSET (18, -56)
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CFI_OFFSET (19, -52)
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CFI_OFFSET (20, -48)
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CFI_OFFSET (21, -44)
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CFI_OFFSET (22, -40)
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CFI_OFFSET (23, -36)
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CFI_OFFSET (24, -32)
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CFI_OFFSET (25, -28)
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CFI_OFFSET (26, -24)
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CFI_OFFSET (27, -20)
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CFI_OFFSET (28, -16)
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CFI_OFFSET (29, -12)
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CFI_OFFSET (30, -8)
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CFI_OFFSET (31, -4)
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FUNCTION(_restgpr_14_x) lwz 14,-72(11) /* restore gp registers */
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CFI_RESTORE (14)
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FUNCTION(_restgpr_15_x) lwz 15,-68(11)
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CFI_RESTORE (15)
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FUNCTION(_restgpr_16_x) lwz 16,-64(11)
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CFI_RESTORE (16)
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FUNCTION(_restgpr_17_x) lwz 17,-60(11)
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CFI_RESTORE (17)
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FUNCTION(_restgpr_18_x) lwz 18,-56(11)
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CFI_RESTORE (18)
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FUNCTION(_restgpr_19_x) lwz 19,-52(11)
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CFI_RESTORE (19)
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FUNCTION(_restgpr_20_x) lwz 20,-48(11)
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CFI_RESTORE (20)
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FUNCTION(_restgpr_21_x) lwz 21,-44(11)
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CFI_RESTORE (21)
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FUNCTION(_restgpr_22_x) lwz 22,-40(11)
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CFI_RESTORE (22)
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FUNCTION(_restgpr_23_x) lwz 23,-36(11)
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CFI_RESTORE (23)
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FUNCTION(_restgpr_24_x) lwz 24,-32(11)
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CFI_RESTORE (24)
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FUNCTION(_restgpr_25_x) lwz 25,-28(11)
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CFI_RESTORE (25)
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FUNCTION(_restgpr_26_x) lwz 26,-24(11)
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CFI_RESTORE (26)
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FUNCTION(_restgpr_27_x) lwz 27,-20(11)
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CFI_RESTORE (27)
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FUNCTION(_restgpr_28_x) lwz 28,-16(11)
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CFI_RESTORE (28)
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FUNCTION(_restgpr_29_x) lwz 29,-12(11)
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CFI_RESTORE (29)
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FUNCTION(_restgpr_30_x) lwz 30,-8(11)
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CFI_RESTORE (30)
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FUNCTION(_restgpr_31_x) lwz 0,4(11)
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lwz 31,-4(11)
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CFI_RESTORE (31)
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mtlr 0
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CFI_RESTORE (65)
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mr 1,11
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CFI_DEF_CFA_REGISTER (1)
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blr
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CFI_ENDPROC
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CFI_STARTPROC
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FUNCTION(_savegpr_14) stw 14,-72(11) /* save gp registers */
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FUNCTION(_savegpr_15) stw 15,-68(11)
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FUNCTION(_savegpr_16) stw 16,-64(11)
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FUNCTION(_savegpr_17) stw 17,-60(11)
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FUNCTION(_savegpr_18) stw 18,-56(11)
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FUNCTION(_savegpr_19) stw 19,-52(11)
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FUNCTION(_savegpr_20) stw 20,-48(11)
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FUNCTION(_savegpr_21) stw 21,-44(11)
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FUNCTION(_savegpr_22) stw 22,-40(11)
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FUNCTION(_savegpr_23) stw 23,-36(11)
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FUNCTION(_savegpr_24) stw 24,-32(11)
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FUNCTION(_savegpr_25) stw 25,-28(11)
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FUNCTION(_savegpr_26) stw 26,-24(11)
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FUNCTION(_savegpr_27) stw 27,-20(11)
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FUNCTION(_savegpr_28) stw 28,-16(11)
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FUNCTION(_savegpr_29) stw 29,-12(11)
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FUNCTION(_savegpr_30) stw 30,-8(11)
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FUNCTION(_savegpr_31) stw 31,-4(11)
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blr
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CFI_ENDPROC
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