Error Branch Out Of Range Android
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Jump Out Of Range Assembly
Us Learn more about Stack Overflow the company Business Learn more about hiring relative jump out of range assembly error developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up MIPS assembler complains about “Branch out of range” with PIC up vote 3 down vote favorite I'm trying to build an assembly source file for Android/MIPSEL32. It's a test case for a weird Pascal compiler issue; but the bug might be in assembler after all. How does the MIPS assembler implement the j command in PIC mode? I have a j-to-label statement, where the label is 184200 bytes away from the current instruction; when assembling in PIC mode, the assembler errors out: a.s:67: Error: Branch out of range My trusty MIPS manual says that j takes an absolute offset, applied within a 256-MB block. The size of the whole code block is much less than 256 MB. I don't see what's wrong with this j. When not compiling for PIC, it works as expected. And why is talking about a branch? Branch and jump are explicitly distinct on MIPS. The PC-relative offset would be 18 bits long in this case. Can't help noticing that it's just above the limit for the b. Would the assembler quietly convert j to b in PIC mode? It's not unheard of that an assembler-level command is implemented as a macro with the same name as the underlying architectural command. But there's a set .nomacro in the function prologue, isn't there? Please explain, and maybe offer a workaround. I don't mind an additional step of scripted assembly fixup on the build path. A similar problem is discussed here, here, here. For the sake of repro steps, the assembly source goes like this: .section .text.n_main .balign 4 .globl PASCALMAIN .type PASCALMAIN,@function P
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Jump out of range solutions and how different instructions affect range up vote 2 down vote favorite 1 I've been struggling a lot with the error "jmp out of range", http://stackoverflow.com/questions/20431377/mips-assembler-complains-about-branch-out-of-range-with-pic a lot of times I need to run a subrutine from different parts of my code as I would a function in C++. I got to a point that both ends on my code need to jump to the same place and there is just no way for both to get there. What is the solution for this? Also I noticed that PRINT 'something' Seems to occupy more "space" than using: CALL PTHIS DB 13, 10, 'something', 0 http://stackoverflow.com/questions/17307834/jump-out-of-range-solutions-and-how-different-instructions-affect-range (If I put a PRINT between two jumps I get jump out of range but if I replace it with a PTHIS there is no problem) Why is this? assembly 8086 share|improve this question asked Jun 25 '13 at 21:25 lisovaccaro 3,20353160289 What does the PRINT macro expand to? –Jim Mischel Jun 25 '13 at 21:38 add a comment| 2 Answers 2 active oldest votes up vote 2 down vote accepted The problem with the conditional jump instructions in 16-bit assembler is that they're limited to +127 or -128 bytes for the offset. Let's say you have this: cmp al, '1' jnz ItsNot1 ; lots of code here ItsNot1: If you get a jump out of range error you can re-code it like this: cmp al, '1' jz Its1 jmp ItsNot1 Its1: ; lots of code here ItsNot1: All I did there is change the sense of the comparison and jump around the unconditional jump that takes you to the alternate code path. It gets annoying sometimes if you have lots of conditional jumps. You'll re-code one of those and it'll trigger another. And then you refactor the code and discover some of those mangled conditionals can go away. Typically I don't worry about it unless I'm seriously concerned about code size. Some assemblers have a switch that will do automatic jump sizing for you so that you can always c
Thumb2 https://sourceware.org/bugzilla/show_bug.cgi?id=18625 branch out of range error Summary: Thumb2 branch out of range error Status: NEW Alias: None Product: binutils Classification: Unclassified Component: gas (show other bugs) Version: 2.26 Importance: P2 normal Target Milestone: --- Assignee: Not yet assigned to anyone URL: Keywords: Depends on: out of Blocks: Reported: 2015-07-05 16:14 UTC by Prathamesh Kulkarni Modified: 2015-07-09 23:23 UTC (History) CC List: 2 users (show) jsweval wilson See Also: Host: Target: Build: Last reconfirmed: Attachments Add an attachment (proposed patch, testcase, etc.) Note You need to log in before out of range you can comment on or make changes to this bug. Description Prathamesh Kulkarni 2015-07-05 16:14:46 UTC Hi, During LTO compilation of chromium with gcc trunk for single partition (-flto --param lto-partitions=1) I get the following assembly error: Thumb2 branch out of range. LTO compilation of chromium with multiple partitions has no issues, this happens only for single or no partitioning. Assembly file: https://www.dropbox.com/s/yl171mwqd9lad9c/chrome.ltrans0.s?dl=0 Options passed to gas: -march=armv7-a -mfloat-abi=hard -mfpu=neon -meabi=5 Backtrace: I get the following backtrace under gdb: #0 as_bad_where (file=0x7fffffffe29f "chromium/src/out/Release/chrome.ltrans0.s", line=20710144, format=0x552ed2 "Thumb2 branch out of range") at /home/prathamesh.kulkarni/gnu-toolchain/src/binutils-gdb.git/gas/messages.c:259 #1 0x000000000045e7dd in md_apply_fix (fixP=0x931ea6e0, valP=0x7fffffffdaa8, seg=0x7cf7c0) at /home/prathamesh.kulkarni/gnu-toolchain/src/binutils-gdb.git/gas/config/tc-arm.c:22700 #2 0x000000000042f0fd in fixup_segment (fixP=0x931ea6e0, this_segment=0x7cf7c0) at /home/prathamesh.kulkarni/gnu-toolchain/src/binutils-gdb.git/gas/write.c:1067 #3 0x000000000042f36e in fix_segment (abfd=0x7b81f0, sec=0x7cf7c0, xxx=0x0) at /home/prathamesh.kulkarni/gnu-toolchain/src/binutils-gdb.git/gas/write.c:1132 #4 0x0000000000473540 in bfd_map_over_sections (abfd=0x7b81f0, operation=0x42f334