055375ef26
LLVM likes to emit offsets of the form foo@toc@ha+16, which we didn't
support. Generalize parseMemRef to handle this case and avoid some of
the repeated offset special-cases. Offsets are now always folded into
the SymbolRef.
This still does not quite implement a fully general GAS-compatible
parser as GAS's parser is insane. GAS in x86_64 will happily accept
things like:
1@GOTPCREL+foo
blah1@GOTPCREL-blah2+blah3-blah4+blah5 # GOTPCREL modifies blah5, rest
# of expression is an offset.
GAS actually textually pulls @GOTPCREL out of the input partway through
parsing the expression and parses the modified input! Then its normal
parser goes and maintains a running expression of a specific type and,
at each term, attempts to merge it into what it currently has. So adding
and subtracting symbols is not commutative (signs must alternate or so)
and the last symbol wins.
However its PPC64 parser is not as general and just terminates each
expression after @toc@ha and friends, except that it special-cases
foo@toc@ha+16: if it can parse one more expression after @toc@ha AND it
is a constant expression, then it is added into the running offset.
Otherwise it leaves that data unconsumed.
This is all ridiculous, so just generalize our parser slightly to cover
foo@toc@ha+16 and see how far we get from there.
Change-Id: I65970791fc10fb2638fd7be8cc841900eb997c9c
Reviewed-on: https://boringssl-review.googlesource.com/16944
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: Adam Langley <agl@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
208 lines
4.0 KiB
ArmAsm
208 lines
4.0 KiB
ArmAsm
.text
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BORINGSSL_bcm_text_start:
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.text
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.Lfoo_local_target:
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foo:
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# TOC references may have offsets.
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# WAS addis 3, 2, 5+foo@toc@ha
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# WAS addi 3, 3, 10+foo@toc@l
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addi 1, 1, -288
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mflr 3
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std 3, -8(1)
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bl .Lbcm_loadtoc__dot_Lfoo_local_target__plus_10
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std 3, -24(1)
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ld 3, -8(1)
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mtlr 3
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ld 3, -24(1)
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addi 1, 1, 288
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# WAS addis 3, 2, 15+foo@toc@ha
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# WAS addi 3, 3, 20+foo@toc@l
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addi 1, 1, -288
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mflr 3
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std 3, -8(1)
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bl .Lbcm_loadtoc__dot_Lfoo_local_target__plus_20
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std 3, -24(1)
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ld 3, -8(1)
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mtlr 3
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ld 3, -24(1)
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addi 1, 1, 288
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# WAS addis 4, 2, foo@toc@ha
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# WAS addi 4, 4, foo@toc@l
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addi 1, 1, -288
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mflr 4
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std 4, -8(1)
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std 3, -16(1)
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bl .Lbcm_loadtoc__dot_Lfoo_local_target
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std 3, -24(1)
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ld 3, -8(1)
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mtlr 3
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ld 4, -24(1)
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ld 3, -16(1)
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addi 1, 1, 288
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# WAS addis 5, 2, 5+foo@toc@ha
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# WAS ld 5, 10+foo@toc@l(5)
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addi 1, 1, -288
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mflr 5
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std 5, -8(1)
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std 3, -16(1)
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bl .Lbcm_loadtoc__dot_Lfoo_local_target__plus_10
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std 3, -24(1)
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ld 3, -8(1)
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mtlr 3
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ld 5, -24(1)
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ld 3, -16(1)
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addi 1, 1, 288
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ld 5, 0(5)
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# WAS addis 4, 2, foo-10@toc@ha
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# WAS addi 4, 4, foo-10@toc@l
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addi 1, 1, -288
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mflr 4
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std 4, -8(1)
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std 3, -16(1)
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bl .Lbcm_loadtoc__dot_Lfoo_local_target__minus_10
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std 3, -24(1)
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ld 3, -8(1)
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mtlr 3
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ld 4, -24(1)
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ld 3, -16(1)
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addi 1, 1, 288
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# WAS addis 4, 2, foo@toc@ha+25
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# WAS addi 4, 4, foo@toc@l+25
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addi 1, 1, -288
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mflr 4
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std 4, -8(1)
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std 3, -16(1)
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bl .Lbcm_loadtoc__dot_Lfoo_local_target__plus_25
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std 3, -24(1)
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ld 3, -8(1)
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mtlr 3
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ld 4, -24(1)
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ld 3, -16(1)
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addi 1, 1, 288
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# WAS addis 4, 2, 1+foo-2@toc@ha+3
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# WAS addi 4, 4, 1+foo-2@toc@l+3
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addi 1, 1, -288
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mflr 4
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std 4, -8(1)
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std 3, -16(1)
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bl .Lbcm_loadtoc__dot_Lfoo_local_target__plus_1_minus_2_plus_3
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std 3, -24(1)
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ld 3, -8(1)
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mtlr 3
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ld 4, -24(1)
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ld 3, -16(1)
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addi 1, 1, 288
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.text
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BORINGSSL_bcm_text_end:
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.type bcm_loadtoc__dot_Lfoo_local_target, @function
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bcm_loadtoc__dot_Lfoo_local_target:
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.Lbcm_loadtoc__dot_Lfoo_local_target:
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addis 3, 2, .Lfoo_local_target@toc@ha
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addi 3, 3, .Lfoo_local_target@toc@l
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blr
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.type bcm_loadtoc__dot_Lfoo_local_target__plus_1_minus_2_plus_3, @function
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bcm_loadtoc__dot_Lfoo_local_target__plus_1_minus_2_plus_3:
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.Lbcm_loadtoc__dot_Lfoo_local_target__plus_1_minus_2_plus_3:
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addis 3, 2, .Lfoo_local_target+1-2+3@toc@ha
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addi 3, 3, .Lfoo_local_target+1-2+3@toc@l
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blr
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.type bcm_loadtoc__dot_Lfoo_local_target__plus_10, @function
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bcm_loadtoc__dot_Lfoo_local_target__plus_10:
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.Lbcm_loadtoc__dot_Lfoo_local_target__plus_10:
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addis 3, 2, .Lfoo_local_target+10@toc@ha
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addi 3, 3, .Lfoo_local_target+10@toc@l
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blr
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.type bcm_loadtoc__dot_Lfoo_local_target__plus_20, @function
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bcm_loadtoc__dot_Lfoo_local_target__plus_20:
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.Lbcm_loadtoc__dot_Lfoo_local_target__plus_20:
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addis 3, 2, .Lfoo_local_target+20@toc@ha
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addi 3, 3, .Lfoo_local_target+20@toc@l
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blr
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.type bcm_loadtoc__dot_Lfoo_local_target__plus_25, @function
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bcm_loadtoc__dot_Lfoo_local_target__plus_25:
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.Lbcm_loadtoc__dot_Lfoo_local_target__plus_25:
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addis 3, 2, .Lfoo_local_target+25@toc@ha
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addi 3, 3, .Lfoo_local_target+25@toc@l
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blr
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.type bcm_loadtoc__dot_Lfoo_local_target__minus_10, @function
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bcm_loadtoc__dot_Lfoo_local_target__minus_10:
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.Lbcm_loadtoc__dot_Lfoo_local_target__minus_10:
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addis 3, 2, .Lfoo_local_target-10@toc@ha
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addi 3, 3, .Lfoo_local_target-10@toc@l
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blr
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.LBORINGSSL_external_toc:
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.quad .TOC.-.LBORINGSSL_external_toc
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.type BORINGSSL_bcm_text_hash, @object
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.size BORINGSSL_bcm_text_hash, 64
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BORINGSSL_bcm_text_hash:
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.byte 0xae
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.byte 0x2c
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.byte 0xea
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.byte 0x2a
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.byte 0xbd
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.byte 0xa6
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.byte 0xf3
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.byte 0xec
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.byte 0x97
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.byte 0x7f
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.byte 0x9b
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.byte 0xf6
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.byte 0x94
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.byte 0x9a
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.byte 0xfc
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.byte 0x83
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.byte 0x68
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.byte 0x27
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.byte 0xcb
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.byte 0xa0
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.byte 0xa0
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.byte 0x9f
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.byte 0x6b
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.byte 0x6f
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.byte 0xde
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.byte 0x52
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.byte 0xcd
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.byte 0xe2
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.byte 0xcd
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.byte 0xff
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.byte 0x31
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.byte 0x80
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.byte 0xa2
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.byte 0xd4
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.byte 0xc3
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.byte 0x66
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.byte 0xf
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.byte 0xc2
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.byte 0x6a
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.byte 0x7b
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.byte 0xf4
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.byte 0xbe
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.byte 0x39
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.byte 0xa2
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.byte 0xd7
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.byte 0x25
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.byte 0xdb
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.byte 0x21
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.byte 0x98
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.byte 0xe9
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.byte 0xd5
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.byte 0x53
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.byte 0xbf
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.byte 0x5c
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.byte 0x32
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.byte 0x6
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.byte 0x83
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.byte 0x34
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.byte 0xc
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.byte 0x65
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.byte 0x89
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.byte 0x52
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.byte 0xbd
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.byte 0x1f
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