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|
# File to either setup register 2 to point to the GOT, or to adjust the
# pointers in the .got2 section to point to their new addresses.
.file "eabi.asm"
.section ".text"
.globl __eabi
.section ".got2","aw"
.LCTOC1 = . # +32768
# Table of addresses
.Ltable = .-.LCTOC1
.long .LCTOC1 # address we are really at
.Lgot = .-.LCTOC1
.long _GLOBAL_OFFSET_TABLE_ # normal GOT address
.Lgots = .-.LCTOC1
.long _GOT_START_ # start of .got section
.Lgote = .-.LCTOC1
.long _GOT_END_ # end of .got section
.Lgot2s = .-.LCTOC1
.long _GOT2_START_ # -mrelocatable GOT pointers start
.Lgot2e = .-.LCTOC1
.long _GOT2_END_ # -mrelocatable GOT pointers end
.Lfixups = .-.LCTOC1
.long _FIXUP_START_ # start of .fixup section
.Lfixupe = .-.LCTOC1
.long _FIXUP_END_ # end of .fixup section
.text
.Lptr:
.long .LCTOC1-.Laddr # PC relative pointer to .got2
.long 0x4000 # traceback table
__eabi: mflr 0
bl .Laddr # get current address
.Laddr:
mflr 12 # real address of .Laddr
lwz 11,(.Lptr-.Laddr)(12) # linker generated address of .LCTOC1
add 11,11,12 # correct to real pointer
lwz 12,.Ltable(11) # get linker's idea of where .Laddr is
subf. 12,12,11 # calculate difference
mtlr 0 # restore link register
bc 4,2,.Lreloc # skip if we need to relocate
# Only load up register 2 if there is a .got section
lwz 3,.Lgots(11) # start of .got section
lwz 4,.Lgote(11) # end of .got section
cmpw 1,3,4 # .got section non-empty?
bc 12,6,.Ldone
# Normal program, load up register 2
lwz 2,.Lgot(11) # normal GOT address (obsolete in register 2)
mr 13,2 # also same as _SDA_BASE_ (V.4 small data ptr)
b __do_global_ctors # do any C++ global constructors (which returns to caller)
# We need to relocate the .got2 pointers. Don't load register 2
.Lreloc:
lwz 3,.Lgot2s(11) # GOT pointers start
lwz 4,.Lgot2e(11) # GOT pointers end
add 3,12,3 # adjust pointers
add 4,12,4
cmpw 1,3,4 # any pointers to adjust
bc 12,6,.Lfix
.Lloop:
lwz 5,0(3) # next pointer
add 5,5,12 # adjust
stw 5,0(3)
addi 3,3,4 # bump to next word
cmpw 1,3,4 # more pointers to adjust?
bc 4,6,.Lloop
# Fixup any user initialized pointers now (the compiler drops pointers to
# each of the relocs that it does in the .fixup section). Note, the pointers
# themselves have already been fixed up by the previous loop.
.Lfix:
lwz 3,.Lfixups(11) # fixup pointers start
lwz 4,.Lfixupe(11) # fixup pointers end
cmpw 1,3,4 # any user pointers to adjust
bc 12,6,.Ldone
.Lfloop:
lwz 5,0(3) # next pointer
lwz 6,0(5) # get the pointer it points to
add 6,6,12 # adjust
stw 6,0(5)
addi 3,3,4 # bump to next word
cmpw 1,3,4 # more pointers to adjust?
bc 4,6,.Lfloop
# Done adjusting pointers, return
.Ldone:
b __do_global_ctors # do any C++ global constructors (which returns to caller)
# Routines for saving floating point registers, called by the compiler.
# Called with r11 pointing to the stack header word of the caller of the
# function, just beyond the end of the floating point save area.
.globl _savefpr_14
.globl _savefpr_15
.globl _savefpr_16
.globl _savefpr_17
.globl _savefpr_18
.globl _savefpr_19
.globl _savefpr_20
.globl _savefpr_21
.globl _savefpr_22
.globl _savefpr_23
.globl _savefpr_24
.globl _savefpr_25
.globl _savefpr_26
.globl _savefpr_27
.globl _savefpr_28
.globl _savefpr_29
.globl _savefpr_30
.globl _savefpr_31
.long 0x00400000 # traceback tag
_savefpr_14: stfd 14,-144(11) # save fp registers
_savefpr_15: stfd 15,-136(11)
_savefpr_16: stfd 16,-128(11)
_savefpr_17: stfd 17,-120(11)
_savefpr_18: stfd 18,-112(11)
_savefpr_19: stfd 19,-104(11)
_savefpr_20: stfd 20,-96(11)
_savefpr_21: stfd 21,-88(11)
_savefpr_22: stfd 22,-80(11)
_savefpr_23: stfd 23,-72(11)
_savefpr_24: stfd 24,-64(11)
_savefpr_25: stfd 25,-56(11)
_savefpr_26: stfd 26,-48(11)
_savefpr_27: stfd 27,-40(11)
_savefpr_28: stfd 28,-32(11)
_savefpr_29: stfd 29,-24(11)
_savefpr_30: stfd 30,-16(11)
_savefpr_31: stfd 31,-8(11)
blr
# Routines for saving integer registers, called by the compiler.
# Called with r11 pointing to the stack header word of the caller of the
# function, just beyond the end of the integer save area.
.globl _savegpr_14
.globl _savegpr_15
.globl _savegpr_16
.globl _savegpr_17
.globl _savegpr_18
.globl _savegpr_19
.globl _savegpr_20
.globl _savegpr_21
.globl _savegpr_22
.globl _savegpr_23
.globl _savegpr_24
.globl _savegpr_25
.globl _savegpr_26
.globl _savegpr_27
.globl _savegpr_28
.globl _savegpr_29
.globl _savegpr_30
.globl _savegpr_31
.long 0x00400000 # traceback tag
_savegpr_14: stw 14,-72(11) # save gp registers
_savegpr_15: stw 15,-68(11)
_savegpr_16: stw 16,-64(11)
_savegpr_17: stw 17,-60(11)
_savegpr_18: stw 18,-56(11)
_savegpr_19: stw 19,-52(11)
_savegpr_20: stw 20,-48(11)
_savegpr_21: stw 21,-44(11)
_savegpr_22: stw 22,-40(11)
_savegpr_23: stw 23,-36(11)
_savegpr_24: stw 24,-32(11)
_savegpr_25: stw 25,-28(11)
_savegpr_26: stw 26,-24(11)
_savegpr_27: stw 27,-20(11)
_savegpr_28: stw 28,-16(11)
_savegpr_29: stw 29,-12(11)
_savegpr_30: stw 30,-8(11)
_savegpr_31: stw 31,-4(11)
blr
# Routines for restoring floating point registers, called by the compiler.
# Called with r11 pointing to the stack header word of the caller of the
# function, just beyond the end of the floating point save area.
.globl _restfpr_14
.globl _restfpr_15
.globl _restfpr_16
.globl _restfpr_17
.globl _restfpr_18
.globl _restfpr_19
.globl _restfpr_20
.globl _restfpr_21
.globl _restfpr_22
.globl _restfpr_23
.globl _restfpr_24
.globl _restfpr_25
.globl _restfpr_26
.globl _restfpr_27
.globl _restfpr_28
.globl _restfpr_29
.globl _restfpr_30
.globl _restfpr_31
.long 0x00600000 # traceback tag
_restfpr_14: lfd 14,-144(11) # restore fp registers
_restfpr_15: lfd 15,-136(11)
_restfpr_16: lfd 16,-128(11)
_restfpr_17: lfd 17,-120(11)
_restfpr_18: lfd 18,-112(11)
_restfpr_19: lfd 19,-104(11)
_restfpr_20: lfd 20,-96(11)
_restfpr_21: lfd 21,-88(11)
_restfpr_22: lfd 22,-80(11)
_restfpr_23: lfd 23,-72(11)
_restfpr_24: lfd 24,-64(11)
_restfpr_25: lfd 25,-56(11)
_restfpr_26: lfd 26,-48(11)
_restfpr_27: lfd 27,-40(11)
_restfpr_28: lfd 28,-32(11)
_restfpr_29: lfd 29,-24(11)
_restfpr_30: lfd 30,-16(11)
_restfpr_31: lfd 31,-8(11)
blr
# Routines for restoring integer registers, called by the compiler.
# Called with r11 pointing to the stack header word of the caller of the
# function, just beyond the end of the integer restore area.
.globl _restgpr_14
.globl _restgpr_15
.globl _restgpr_16
.globl _restgpr_17
.globl _restgpr_18
.globl _restgpr_19
.globl _restgpr_20
.globl _restgpr_21
.globl _restgpr_22
.globl _restgpr_23
.globl _restgpr_24
.globl _restgpr_25
.globl _restgpr_26
.globl _restgpr_27
.globl _restgpr_28
.globl _restgpr_29
.globl _restgpr_30
.globl _restgpr_31
.long 0x00600000 # traceback tag
_restgpr_14: lwz 14,-72(11) # rest gp registers
_restgpr_15: lwz 15,-68(11)
_restgpr_16: lwz 16,-64(11)
_restgpr_17: lwz 17,-60(11)
_restgpr_18: lwz 18,-56(11)
_restgpr_19: lwz 19,-52(11)
_restgpr_20: lwz 20,-48(11)
_restgpr_21: lwz 21,-44(11)
_restgpr_22: lwz 22,-40(11)
_restgpr_23: lwz 23,-36(11)
_restgpr_24: lwz 24,-32(11)
_restgpr_25: lwz 25,-28(11)
_restgpr_26: lwz 26,-24(11)
_restgpr_27: lwz 27,-20(11)
_restgpr_28: lwz 28,-16(11)
_restgpr_29: lwz 29,-12(11)
_restgpr_30: lwz 30,-8(11)
_restgpr_31: lwz 31,-4(11)
blr
# Routines for restoring floating point registers, called by the compiler.
# Called with r11 pointing to the stack header word of the caller of the
# function, just beyond the end of the floating point save area.
# In addition to restoring the fp registers, it will return to the caller's
# caller
.globl _restfpr_14_x
.globl _restfpr_15_x
.globl _restfpr_16_x
.globl _restfpr_17_x
.globl _restfpr_18_x
.globl _restfpr_19_x
.globl _restfpr_20_x
.globl _restfpr_21_x
.globl _restfpr_22_x
.globl _restfpr_23_x
.globl _restfpr_24_x
.globl _restfpr_25_x
.globl _restfpr_26_x
.globl _restfpr_27_x
.globl _restfpr_28_x
.globl _restfpr_29_x
.globl _restfpr_30_x
.globl _restfpr_31_x
.long 0x00600000 # traceback tag
_restfpr_14_x: lfd 14,-144(11) # restore fp registers
_restfpr_15_x: lfd 15,-136(11)
_restfpr_16_x: lfd 16,-128(11)
_restfpr_17_x: lfd 17,-120(11)
_restfpr_18_x: lfd 18,-112(11)
_restfpr_19_x: lfd 19,-104(11)
_restfpr_20_x: lfd 20,-96(11)
_restfpr_21_x: lfd 21,-88(11)
_restfpr_22_x: lfd 22,-80(11)
_restfpr_23_x: lfd 23,-72(11)
_restfpr_24_x: lfd 24,-64(11)
_restfpr_25_x: lfd 25,-56(11)
_restfpr_26_x: lfd 26,-48(11)
_restfpr_27_x: lfd 27,-40(11)
_restfpr_28_x: lfd 28,-32(11)
_restfpr_29_x: lfd 29,-24(11)
_restfpr_30_x: lfd 30,-16(11)
_restfpr_31_x: lwz 0,4(11)
lfd 31,-8(11)
mtlr 0
mr 1,11
blr
# Routines for restoring integer registers, called by the compiler.
# Called with r11 pointing to the stack header word of the caller of the
# function, just beyond the end of the integer restore area.
.globl _restgpr_14_x
.globl _restgpr_15_x
.globl _restgpr_16_x
.globl _restgpr_17_x
.globl _restgpr_18_x
.globl _restgpr_19_x
.globl _restgpr_20_x
.globl _restgpr_21_x
.globl _restgpr_22_x
.globl _restgpr_23_x
.globl _restgpr_24_x
.globl _restgpr_25_x
.globl _restgpr_26_x
.globl _restgpr_27_x
.globl _restgpr_28_x
.globl _restgpr_29_x
.globl _restgpr_30_x
.globl _restgpr_31_x
.long 0x00600000 # traceback tag
_restgpr_14_x: lwz 14,-72(11) # rest gp registers
_restgpr_15_x: lwz 15,-68(11)
_restgpr_16_x: lwz 16,-64(11)
_restgpr_17_x: lwz 17,-60(11)
_restgpr_18_x: lwz 18,-56(11)
_restgpr_19_x: lwz 19,-52(11)
_restgpr_20_x: lwz 20,-48(11)
_restgpr_21_x: lwz 21,-44(11)
_restgpr_22_x: lwz 22,-40(11)
_restgpr_23_x: lwz 23,-36(11)
_restgpr_24_x: lwz 24,-32(11)
_restgpr_25_x: lwz 25,-28(11)
_restgpr_26_x: lwz 26,-24(11)
_restgpr_27_x: lwz 27,-20(11)
_restgpr_28_x: lwz 28,-16(11)
_restgpr_29_x: lwz 29,-12(11)
_restgpr_30_x: lwz 30,-8(11)
_restgpr_31_x: lwz 0,4(11)
lwz 31,-4(11)
mtlr 0
mr 1,11
blr
|
