diff options
Diffstat (limited to 'gas/config')
| -rw-r--r-- | gas/config/tc-mips.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/gas/config/tc-mips.c b/gas/config/tc-mips.c index cdcebf1..2b3e4dc 100644 --- a/gas/config/tc-mips.c +++ b/gas/config/tc-mips.c @@ -3454,10 +3454,20 @@ append_insn (struct mips_cl_insn *ip, expressionS *address_expr, #ifdef OBJ_ELF /* The value passed to dwarf2_emit_insn is the distance between the beginning of the current instruction and the address that - should be recorded in the debug tables. For MIPS16 debug info - we want to use ISA-encoded addresses, so we pass -1 for an - address higher by one than the current. */ - dwarf2_emit_insn (mips_opts.mips16 ? -1 : 0); + should be recorded in the debug tables. This is normally the + current address. + + For MIPS16 debug info we want to use ISA-encoded addresses, + so we use -1 for an address higher by one than the current one. + + If the instruction produced is a branch that we will swap with + the preceding instruction, then we add the displacement by which + the branch will be moved backwards. This is more appropriate + and for MIPS16 code also prevents a debugger from placing a + breakpoint in the middle of the branch (and corrupting code if + software breakpoints are used). */ + dwarf2_emit_insn ((mips_opts.mips16 ? -1 : 0) + + (method == APPEND_SWAP ? insn_length (history) : 0)); #endif if (address_expr |