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| author | Jan Beulich <jbeulich@novell.com> | 2017-11-23 11:02:30 +0100 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2017-11-23 11:02:30 +0100 |
| commit | 43083a502b8d658b8d096111e54afcc73b0215a4 (patch) | |
| tree | 0695c73e2bf6e60e243e0afcc023c7ef8fb96359 /gas | |
| parent | 9bb129e82f0506fe78d61670ea2b4140388955dd (diff) | |
| download | gdb-43083a502b8d658b8d096111e54afcc73b0215a4.zip gdb-43083a502b8d658b8d096111e54afcc73b0215a4.tar.gz gdb-43083a502b8d658b8d096111e54afcc73b0215a4.tar.bz2 | |
x86-64: always use unsigned 32-bit reloc for 32-bit addressing w/o base reg
Except for %eip-relative addressing, where we don't have a suitable
relocation type silently wrapping at the 4G boundary, consistently
force use of R_X86_64_32 (in ELF terms) instead of its sign-extending
counterpart. This wasn't right in case there was no base register in
the addressing expression.
Diffstat (limited to 'gas')
| -rw-r--r-- | gas/ChangeLog | 9 | ||||
| -rw-r--r-- | gas/config/tc-i386.c | 4 | ||||
| -rw-r--r-- | gas/testsuite/gas/i386/reloc64.d | 4 | ||||
| -rw-r--r-- | gas/testsuite/gas/i386/reloc64.s | 6 |
4 files changed, 21 insertions, 2 deletions
diff --git a/gas/ChangeLog b/gas/ChangeLog index d871aa3..fbe7896 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,5 +1,14 @@ 2017-11-23 Jan Beulich <jbeulich@suse.com> + PR gas/22441 + * config/tc-i386.c (build_modrm_byte): Add address override + prefix checks alongside 64-bit mode ones. + * testsuite/gas/i386/reloc64.s: Add 32-bit signed/unsigned + relocation cases. + * testsuite/gas/i386/reloc64.d: Adjust expectations. + +2017-11-23 Jan Beulich <jbeulich@suse.com> + * config/tc-i386.c (build_modrm_byte): Drop VSIB handling from code also setting fake_zero_displacement. diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c index e22e74c..4b602d4 100644 --- a/gas/config/tc-i386.c +++ b/gas/config/tc-i386.c @@ -6566,7 +6566,7 @@ build_modrm_byte (void) i.types[op].bitfield.disp8 = 0; i.types[op].bitfield.disp16 = 0; i.types[op].bitfield.disp64 = 0; - if (flag_code != CODE_64BIT) + if (flag_code != CODE_64BIT || i.prefix[ADDR_PREFIX]) { /* Must be 32 bit */ i.types[op].bitfield.disp32 = 1; @@ -6636,7 +6636,7 @@ build_modrm_byte (void) i.types[op].bitfield.disp8 = 0; i.types[op].bitfield.disp16 = 0; i.types[op].bitfield.disp64 = 0; - if (flag_code != CODE_64BIT) + if (flag_code != CODE_64BIT || i.prefix[ADDR_PREFIX]) { /* Must be 32 bit */ i.types[op].bitfield.disp32 = 1; diff --git a/gas/testsuite/gas/i386/reloc64.d b/gas/testsuite/gas/i386/reloc64.d index ea7f696..a7fd3d6 100644 --- a/gas/testsuite/gas/i386/reloc64.d +++ b/gas/testsuite/gas/i386/reloc64.d @@ -51,6 +51,10 @@ Disassembly of section \.text: .*[ ]+R_X86_64_TPOFF32[ ]+xtrn .*[ ]+R_X86_64_TPOFF32[ ]+xtrn .*[ ]+R_X86_64_GOTPLT64[ ]+xtrn +.*[ ]+R_X86_64_32S[ ]+xtrn +.*[ ]+R_X86_64_32[ ]+xtrn +.*[ ]+R_X86_64_32S[ ]+xtrn +.*[ ]+R_X86_64_32[ ]+xtrn Disassembly of section \.data: #... .*[ ]+R_X86_64_64[ ]+xtrn diff --git a/gas/testsuite/gas/i386/reloc64.s b/gas/testsuite/gas/i386/reloc64.s index ecaaef5..0f9c51e 100644 --- a/gas/testsuite/gas/i386/reloc64.s +++ b/gas/testsuite/gas/i386/reloc64.s @@ -218,3 +218,9 @@ bad call xtrn@gotplt bad .long xtrn@gotplt bad .word xtrn@gotplt bad .byte xtrn@gotplt + + .text + mov xtrn(,%rbx), %eax + mov xtrn(,%ebx), %eax + vgatherdps %xmm2, xtrn(,%xmm1), %xmm0 + addr32 vgatherdps %xmm2, xtrn(,%xmm1), %xmm0 |