diff options
Diffstat (limited to 'gas/config')
| -rw-r--r-- | gas/config/tc-arm.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c index af8c4aa..a0b31a0 100644 --- a/gas/config/tc-arm.c +++ b/gas/config/tc-arm.c @@ -239,6 +239,15 @@ static int mfloat_abi_opt = -1; static arm_feature_set selected_cpu = ARM_ARCH_NONE; /* Must be long enough to hold any of the names in arm_cpus. */ static char selected_cpu_name[16]; + +/* Return if no cpu was selected on command-line. */ +static bfd_boolean +no_cpu_selected (void) +{ + return selected_cpu.core == arm_arch_none.core + && selected_cpu.coproc == arm_arch_none.coproc; +} + #ifdef OBJ_ELF # ifdef EABI_DEFAULT static int meabi_flags = EABI_DEFAULT; @@ -10378,6 +10387,21 @@ do_t_ldst (void) } /* Definitely a 32-bit variant. */ + /* Warning for Erratum 752419. */ + if (opcode == T_MNEM_ldr + && inst.operands[0].reg == REG_SP + && inst.operands[1].writeback == 1 + && !inst.operands[1].immisreg) + { + if (no_cpu_selected () + || (ARM_CPU_HAS_FEATURE (cpu_variant, arm_ext_v7) + && !ARM_CPU_HAS_FEATURE (cpu_variant, arm_ext_v7a) + && !ARM_CPU_HAS_FEATURE (cpu_variant, arm_ext_v7r))) + as_warn (_("This instruction may be unpredictable " + "if executed on M-profile cores " + "with interrupts enabled.")); + } + /* Do some validations regarding addressing modes. */ if (inst.operands[1].immisreg && opcode != T_MNEM_ldr && opcode != T_MNEM_str) |