From 26617deeb17dfc4e390bbbbbf37bb33844108be9 Mon Sep 17 00:00:00 2001 From: Nick Clifton Date: Tue, 17 May 2005 11:56:13 +0000 Subject: * config/tc-v850,h (TC_FIX_TYPE): Define. (TC_INIT_FIX_TYPE): Define. * config/tc-v850.c (md_assemble): When creating a fix record the operand in the tc_fix_data field. (md_apply_fix3): When applying a resolved fix use the operand's insertion procedure to store the value, if the operand has been recorded. * gas/v850/split-lo16.s: Add test for a lo() pseudo reloc corrupting an ld.w instruction. * gas/v850/split-lo16.d: Add expected, correct (ie not corrupt) output. --- gas/ChangeLog | 10 ++++++++ gas/config/tc-v850.c | 48 +++++++++++++++++++++++++++++-------- gas/config/tc-v850.h | 5 ++++ gas/symbols.c | 26 +++++++++++++------- gas/testsuite/ChangeLog | 7 ++++++ gas/testsuite/gas/v850/split-lo16.d | 2 ++ gas/testsuite/gas/v850/split-lo16.s | 3 +++ 7 files changed, 83 insertions(+), 18 deletions(-) (limited to 'gas') diff --git a/gas/ChangeLog b/gas/ChangeLog index 67a4a1e796..df1def0aa9 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,3 +1,13 @@ +2005-05-17 Nick Clifton + + * config/tc-v850,h (TC_FIX_TYPE): Define. + (TC_INIT_FIX_TYPE): Define. + * config/tc-v850.c (md_assemble): When creating a fix record the + operand in the tc_fix_data field. + (md_apply_fix3): When applying a resolved fix use the operand's + insertion procedure to store the value, if the operand has been + recorded. + 2005-05-15 Daniel Jacobowitz * Makefile.am (m68k-parse.c, itbl-parse.c): Update ylwrap diff --git a/gas/config/tc-v850.c b/gas/config/tc-v850.c index 33eef58399..1828396c0d 100644 --- a/gas/config/tc-v850.c +++ b/gas/config/tc-v850.c @@ -2125,6 +2125,8 @@ md_assemble (char *str) reloc_howto->pc_relative, reloc); + fixP->tc_fix_data = (void *) operand; + switch (reloc) { case BFD_RELOC_LO16: @@ -2319,16 +2321,42 @@ md_apply_fix3 (fixS *fixP, valueT *valueP, segT seg ATTRIBUTE_UNUSED) /* We still have to insert the value into memory! */ where = fixP->fx_frag->fr_literal + fixP->fx_where; - if (fixP->fx_r_type == BFD_RELOC_V850_LO16_SPLIT_OFFSET) - bfd_putl32 (((value << 16) & 0xfffe0000) - | ((value << 5) & 0x20) - | (bfd_getl32 (where) & ~0xfffe0020), where); - else if (fixP->fx_size == 1) - *where = value & 0xff; - else if (fixP->fx_size == 2) - bfd_putl16 (value & 0xffff, (unsigned char *) where); - else if (fixP->fx_size == 4) - bfd_putl32 (value, (unsigned char *) where); + if (fixP->tc_fix_data != NULL) + { + struct v850_operand * operand = (struct v850_operand *) fixP->tc_fix_data; + unsigned long insn; + + /* The variable "where" currently points at the exact point inside + the insn where we need to insert the value. But we need to + extract the entire insn so we probably need to move "where" + back a few bytes. */ + if (fixP->fx_size == 2) + where -= 2; + else if (fixP->fx_size == 1) + where -= 3; + + insn = bfd_getl32 ((unsigned char *) where); + + /* Use the operand's insertion procedure, if present, in order to + make sure that the value is correctly stored in the insn. */ + insn = v850_insert_operand (insn, operand, (offsetT) value, + fixP->fx_file, fixP->fx_line, NULL); + + bfd_putl32 ((bfd_vma) insn, (unsigned char *) where); + } + else + { + if (fixP->fx_r_type == BFD_RELOC_V850_LO16_SPLIT_OFFSET) + bfd_putl32 (((value << 16) & 0xfffe0000) + | ((value << 5) & 0x20) + | (bfd_getl32 (where) & ~0xfffe0020), where); + else if (fixP->fx_size == 1) + *where = value & 0xff; + else if (fixP->fx_size == 2) + bfd_putl16 (value & 0xffff, (unsigned char *) where); + else if (fixP->fx_size == 4) + bfd_putl32 (value, (unsigned char *) where); + } } } diff --git a/gas/config/tc-v850.h b/gas/config/tc-v850.h index 5db1141427..4dd3c7e263 100644 --- a/gas/config/tc-v850.h +++ b/gas/config/tc-v850.h @@ -78,3 +78,8 @@ extern void v850_handle_align (fragS *); extern long v850_pcrel_from_section (struct fix *, asection *); #define DWARF2_LINE_MIN_INSN_LENGTH 2 + +/* We need to record the operand involved when a pseudo-reloc is + processed so that the resulting value can be inserted correctly. */ +#define TC_FIX_TYPE void * +#define TC_INIT_FIX_DATA(fixP) (fixP)->tc_fix_data = NULL diff --git a/gas/symbols.c b/gas/symbols.c index 5341c6a2ef..ebcad5bf21 100644 --- a/gas/symbols.c +++ b/gas/symbols.c @@ -906,6 +906,7 @@ resolve_symbol_value (symbolS *symp) offsetT left, right; segT seg_left, seg_right; operatorT op; + int move_seg_ok; symp->sy_resolving = 1; @@ -1091,18 +1092,15 @@ resolve_symbol_value (symbolS *symp) } } + move_seg_ok = 1; /* Equality and non-equality tests are permitted on anything. Subtraction, and other comparison operators are permitted if both operands are in the same section. Otherwise, both operands must be absolute. We already handled the case of addition or subtraction of a constant above. This will probably need to be changed for an object file format which - supports arbitrary expressions, such as IEEE-695. - - Don't emit messages unless we're finalizing the symbol value, - otherwise we may get the same message multiple times. */ - if (finalize_syms - && !(seg_left == absolute_section + supports arbitrary expressions, such as IEEE-695. */ + if (!(seg_left == absolute_section && seg_right == absolute_section) && !(op == O_eq || op == O_ne) && !((op == O_subtract @@ -1110,9 +1108,21 @@ resolve_symbol_value (symbolS *symp) && seg_left == seg_right && (seg_left != undefined_section || add_symbol == op_symbol))) - report_op_error (symp, add_symbol, op_symbol); + { + /* Don't emit messages unless we're finalizing the symbol value, + otherwise we may get the same message multiple times. */ + if (finalize_syms) + report_op_error (symp, add_symbol, op_symbol); + /* However do not move the symbol into the absolute section + if it cannot currently be resolved - this would confuse + other parts of the assembler into believing that the + expression had been evaluated to zero. */ + else + move_seg_ok = 0; + } - if (final_seg == expr_section || final_seg == undefined_section) + if (move_seg_ok + && (final_seg == expr_section || final_seg == undefined_section)) final_seg = absolute_section; /* Check for division by zero. */ diff --git a/gas/testsuite/ChangeLog b/gas/testsuite/ChangeLog index d2210458f0..4322c2698e 100644 --- a/gas/testsuite/ChangeLog +++ b/gas/testsuite/ChangeLog @@ -1,3 +1,10 @@ +2005-05-17 Nick Clifton + + * gas/v850/split-lo16.s: Add test for a lo() pseudo reloc + corrupting an ld.w instruction. + * gas/v850/split-lo16.d: Add expected, correct (ie not corrupt) + output. + 2005-05-10 Michael Matz * gas/hppa/parse/block1.s: Use official limit (0x3fffffff) for diff --git a/gas/testsuite/gas/v850/split-lo16.d b/gas/testsuite/gas/v850/split-lo16.d index 9503ac9d8d..5ed195cb08 100644 --- a/gas/testsuite/gas/v850/split-lo16.d +++ b/gas/testsuite/gas/v850/split-lo16.d @@ -13,4 +13,6 @@ c: R_V850_LO16_SPLIT_OFFSET foo 10: a1 17 45 23 ld\.bu 9029\[r1\],r2 14: 81 17 57 34 ld\.bu 13398\[r1\],r2 + 18: 20 57 01 00 ld.w 0\[r0\],r10 + 1c: 20 57 79 56 ld.w 22136\[r0\],r10 #pass diff --git a/gas/testsuite/gas/v850/split-lo16.s b/gas/testsuite/gas/v850/split-lo16.s index fc3afd14e6..bb6fb666c0 100644 --- a/gas/testsuite/gas/v850/split-lo16.s +++ b/gas/testsuite/gas/v850/split-lo16.s @@ -5,3 +5,6 @@ ld.bu lo(0x12345),r1,r2 ld.bu lo(0x123456),r1,r2 + + ld.w lo(0)[r0], r10 + ld.w lo(0x12345678)[r0], r10 -- cgit v1.2.1