From a0e1e6d705b44c3e71621fbf137bb3faf1719b33 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Fri, 4 Mar 2016 11:30:18 +0000 Subject: linux-user: arm: fix coding style for some linux-user signal functions Reviewed-by: Peter Maydell Signed-off-by: Paolo Bonzini Signed-off-by: Peter Crosthwaite Signed-off-by: Peter Maydell --- linux-user/signal.c | 110 ++++++++++++++++++++++++++-------------------------- 1 file changed, 56 insertions(+), 54 deletions(-) (limited to 'linux-user') diff --git a/linux-user/signal.c b/linux-user/signal.c index 962111c..96e86c0 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -1536,82 +1536,84 @@ static void setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ CPUARMState *env, abi_ulong mask) { - __put_user(env->regs[0], &sc->arm_r0); - __put_user(env->regs[1], &sc->arm_r1); - __put_user(env->regs[2], &sc->arm_r2); - __put_user(env->regs[3], &sc->arm_r3); - __put_user(env->regs[4], &sc->arm_r4); - __put_user(env->regs[5], &sc->arm_r5); - __put_user(env->regs[6], &sc->arm_r6); - __put_user(env->regs[7], &sc->arm_r7); - __put_user(env->regs[8], &sc->arm_r8); - __put_user(env->regs[9], &sc->arm_r9); - __put_user(env->regs[10], &sc->arm_r10); - __put_user(env->regs[11], &sc->arm_fp); - __put_user(env->regs[12], &sc->arm_ip); - __put_user(env->regs[13], &sc->arm_sp); - __put_user(env->regs[14], &sc->arm_lr); - __put_user(env->regs[15], &sc->arm_pc); + __put_user(env->regs[0], &sc->arm_r0); + __put_user(env->regs[1], &sc->arm_r1); + __put_user(env->regs[2], &sc->arm_r2); + __put_user(env->regs[3], &sc->arm_r3); + __put_user(env->regs[4], &sc->arm_r4); + __put_user(env->regs[5], &sc->arm_r5); + __put_user(env->regs[6], &sc->arm_r6); + __put_user(env->regs[7], &sc->arm_r7); + __put_user(env->regs[8], &sc->arm_r8); + __put_user(env->regs[9], &sc->arm_r9); + __put_user(env->regs[10], &sc->arm_r10); + __put_user(env->regs[11], &sc->arm_fp); + __put_user(env->regs[12], &sc->arm_ip); + __put_user(env->regs[13], &sc->arm_sp); + __put_user(env->regs[14], &sc->arm_lr); + __put_user(env->regs[15], &sc->arm_pc); #ifdef TARGET_CONFIG_CPU_32 - __put_user(cpsr_read(env), &sc->arm_cpsr); + __put_user(cpsr_read(env), &sc->arm_cpsr); #endif - __put_user(/* current->thread.trap_no */ 0, &sc->trap_no); - __put_user(/* current->thread.error_code */ 0, &sc->error_code); - __put_user(/* current->thread.address */ 0, &sc->fault_address); - __put_user(mask, &sc->oldmask); + __put_user(/* current->thread.trap_no */ 0, &sc->trap_no); + __put_user(/* current->thread.error_code */ 0, &sc->error_code); + __put_user(/* current->thread.address */ 0, &sc->fault_address); + __put_user(mask, &sc->oldmask); } static inline abi_ulong get_sigframe(struct target_sigaction *ka, CPUARMState *regs, int framesize) { - unsigned long sp = regs->regs[13]; + unsigned long sp = regs->regs[13]; - /* - * This is the X/Open sanctioned signal stack switching. - */ - if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - /* - * ATPCS B01 mandates 8-byte alignment - */ - return (sp - framesize) & ~7; + /* + * This is the X/Open sanctioned signal stack switching. + */ + if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) { + sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; + } + /* + * ATPCS B01 mandates 8-byte alignment + */ + return (sp - framesize) & ~7; } static void setup_return(CPUARMState *env, struct target_sigaction *ka, abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr) { - abi_ulong handler = ka->_sa_handler; - abi_ulong retcode; - int thumb = handler & 1; - uint32_t cpsr = cpsr_read(env); + abi_ulong handler = ka->_sa_handler; + abi_ulong retcode; + int thumb = handler & 1; + uint32_t cpsr = cpsr_read(env); - cpsr &= ~CPSR_IT; - if (thumb) { - cpsr |= CPSR_T; - } else { - cpsr &= ~CPSR_T; - } + cpsr &= ~CPSR_IT; + if (thumb) { + cpsr |= CPSR_T; + } else { + cpsr &= ~CPSR_T; + } - if (ka->sa_flags & TARGET_SA_RESTORER) { - retcode = ka->sa_restorer; - } else { - unsigned int idx = thumb; + if (ka->sa_flags & TARGET_SA_RESTORER) { + retcode = ka->sa_restorer; + } else { + unsigned int idx = thumb; - if (ka->sa_flags & TARGET_SA_SIGINFO) - idx += 2; + if (ka->sa_flags & TARGET_SA_SIGINFO) { + idx += 2; + } __put_user(retcodes[idx], rc); - retcode = rc_addr + thumb; - } + retcode = rc_addr + thumb; + } - env->regs[0] = usig; - env->regs[13] = frame_addr; - env->regs[14] = retcode; - env->regs[15] = handler & (thumb ? ~1 : ~3); - cpsr_write(env, cpsr, CPSR_IT | CPSR_T, CPSRWriteByInstr); + env->regs[0] = usig; + env->regs[13] = frame_addr; + env->regs[14] = retcode; + env->regs[15] = handler & (thumb ? ~1 : ~3); + cpsr_write(env, cpsr, CPSR_IT | CPSR_T, CPSRWriteByInstr); } static abi_ulong *setup_sigframe_v2_vfp(abi_ulong *regspace, CPUARMState *env) -- cgit v1.1 From 49017bd8b4395ba380c45c2fc41f4353fc2f0f06 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Fri, 4 Mar 2016 11:30:18 +0000 Subject: linux-user: arm: pass env to get_user_code_* This matches the idiom used by get_user_data_* later in the series, and will help when bswap_code will be replaced by SCTLR.B. Reviewed-by: Peter Maydell Signed-off-by: Paolo Bonzini Signed-off-by: Peter Crosthwaite Signed-off-by: Peter Maydell --- linux-user/main.c | 20 +++++++++----------- 1 file changed, 9 insertions(+), 11 deletions(-) (limited to 'linux-user') diff --git a/linux-user/main.c b/linux-user/main.c index 700724e..bcb9f66 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -435,17 +435,17 @@ void cpu_loop(CPUX86State *env) #ifdef TARGET_ARM -#define get_user_code_u32(x, gaddr, doswap) \ +#define get_user_code_u32(x, gaddr, env) \ ({ abi_long __r = get_user_u32((x), (gaddr)); \ - if (!__r && (doswap)) { \ + if (!__r && (env)->bswap_code) { \ (x) = bswap32(x); \ } \ __r; \ }) -#define get_user_code_u16(x, gaddr, doswap) \ +#define get_user_code_u16(x, gaddr, env) \ ({ abi_long __r = get_user_u16((x), (gaddr)); \ - if (!__r && (doswap)) { \ + if (!__r && (env)->bswap_code) { \ (x) = bswap16(x); \ } \ __r; \ @@ -692,7 +692,7 @@ void cpu_loop(CPUARMState *env) /* we handle the FPU emulation here, as Linux */ /* we get the opcode */ /* FIXME - what to do if get_user() fails? */ - get_user_code_u32(opcode, env->regs[15], env->bswap_code); + get_user_code_u32(opcode, env->regs[15], env); rc = EmulateAll(opcode, &ts->fpa, env); if (rc == 0) { /* illegal instruction */ @@ -762,25 +762,23 @@ void cpu_loop(CPUARMState *env) if (trapnr == EXCP_BKPT) { if (env->thumb) { /* FIXME - what to do if get_user() fails? */ - get_user_code_u16(insn, env->regs[15], env->bswap_code); + get_user_code_u16(insn, env->regs[15], env); n = insn & 0xff; env->regs[15] += 2; } else { /* FIXME - what to do if get_user() fails? */ - get_user_code_u32(insn, env->regs[15], env->bswap_code); + get_user_code_u32(insn, env->regs[15], env); n = (insn & 0xf) | ((insn >> 4) & 0xff0); env->regs[15] += 4; } } else { if (env->thumb) { /* FIXME - what to do if get_user() fails? */ - get_user_code_u16(insn, env->regs[15] - 2, - env->bswap_code); + get_user_code_u16(insn, env->regs[15] - 2, env); n = insn & 0xff; } else { /* FIXME - what to do if get_user() fails? */ - get_user_code_u32(insn, env->regs[15] - 4, - env->bswap_code); + get_user_code_u32(insn, env->regs[15] - 4, env); n = insn & 0xffffff; } } -- cgit v1.1 From f9fd40ebe4f55e0048e002925b8d65e66d56e7a7 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Fri, 4 Mar 2016 11:30:19 +0000 Subject: target-arm: implement SCTLR.B, drop bswap_code bswap_code is a CPU property of sorts ("is the iside endianness the opposite way round to TARGET_WORDS_BIGENDIAN?") but it is not the actual CPU state involved here which is SCTLR.B (set for BE32 binaries, clear for BE8). Replace bswap_code with SCTLR.B, and pass that to arm_ld*_code. The next patches will make data fetches honor both SCTLR.B and CPSR.E appropriately. Signed-off-by: Paolo Bonzini [PC changes: * rebased on master (Jan 2016) * s/TARGET_USER_ONLY/CONFIG_USER_ONLY * Use bswap_code() for disas_set_info() instead of raw sctlr_b ] Signed-off-by: Peter Crosthwaite Reviewed-by: Peter Maydell Signed-off-by: Peter Maydell --- linux-user/main.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) (limited to 'linux-user') diff --git a/linux-user/main.c b/linux-user/main.c index bcb9f66..fe2a8dd 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -437,7 +437,7 @@ void cpu_loop(CPUX86State *env) #define get_user_code_u32(x, gaddr, env) \ ({ abi_long __r = get_user_u32((x), (gaddr)); \ - if (!__r && (env)->bswap_code) { \ + if (!__r && bswap_code(arm_sctlr_b(env))) { \ (x) = bswap32(x); \ } \ __r; \ @@ -445,7 +445,7 @@ void cpu_loop(CPUX86State *env) #define get_user_code_u16(x, gaddr, env) \ ({ abi_long __r = get_user_u16((x), (gaddr)); \ - if (!__r && (env)->bswap_code) { \ + if (!__r && bswap_code(arm_sctlr_b(env))) { \ (x) = bswap16(x); \ } \ __r; \ @@ -4449,11 +4449,15 @@ int main(int argc, char **argv, char **envp) for(i = 0; i < 16; i++) { env->regs[i] = regs->uregs[i]; } +#ifdef TARGET_WORDS_BIGENDIAN /* Enable BE8. */ if (EF_ARM_EABI_VERSION(info->elf_flags) >= EF_ARM_EABI_VER4 && (info->elf_flags & EF_ARM_BE8)) { - env->bswap_code = 1; + /* nothing for now, CPSR.E not emulated yet */ + } else { + env->cp15.sctlr_el[1] |= SCTLR_B; } +#endif } #elif defined(TARGET_UNICORE32) { -- cgit v1.1 From 9c5a7460389e92d230362a983b5a4158d6a1cefe Mon Sep 17 00:00:00 2001 From: Peter Crosthwaite Date: Fri, 4 Mar 2016 11:30:19 +0000 Subject: linux-user: arm: set CPSR.E/SCTLR.E0E correctly for BE mode If doing big-endian linux-user mode, set both the CPSR.E and SCTLR.E0E bits. This sets big-endian mode for data accesses. Signed-off-by: Peter Crosthwaite Reviewed-by: Peter Maydell Signed-off-by: Peter Maydell --- linux-user/main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'linux-user') diff --git a/linux-user/main.c b/linux-user/main.c index fe2a8dd..510b3b7 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -4453,7 +4453,8 @@ int main(int argc, char **argv, char **envp) /* Enable BE8. */ if (EF_ARM_EABI_VERSION(info->elf_flags) >= EF_ARM_EABI_VER4 && (info->elf_flags & EF_ARM_BE8)) { - /* nothing for now, CPSR.E not emulated yet */ + env->uncached_cpsr |= CPSR_E; + env->cp15.sctlr_el[1] |= SCTLR_E0E; } else { env->cp15.sctlr_el[1] |= SCTLR_B; } -- cgit v1.1 From c3ae85fc8f36b64fb73038214e4359f1e470d169 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Fri, 4 Mar 2016 11:30:19 +0000 Subject: linux-user: arm: handle CPSR.E correctly in strex emulation Now that CPSR.E is set correctly, prepare for when setend will be able to change it; bswap data in and out of strex manually by comparing SCTLR.B, CPSR.E and TARGET_WORDS_BIGENDIAN (we do not have the luxury of using TCGMemOps). Signed-off-by: Paolo Bonzini [ PC changes: * Moved SCTLR/CPSR logic to arm_cpu_data_is_big_endian ] Signed-off-by: Peter Crosthwaite Reviewed-by: Peter Maydell Signed-off-by: Peter Maydell --- linux-user/main.c | 50 +++++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 43 insertions(+), 7 deletions(-) (limited to 'linux-user') diff --git a/linux-user/main.c b/linux-user/main.c index 510b3b7..2b1e755 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -451,6 +451,38 @@ void cpu_loop(CPUX86State *env) __r; \ }) +#define get_user_data_u32(x, gaddr, env) \ + ({ abi_long __r = get_user_u32((x), (gaddr)); \ + if (!__r && arm_cpu_bswap_data(env)) { \ + (x) = bswap32(x); \ + } \ + __r; \ + }) + +#define get_user_data_u16(x, gaddr, env) \ + ({ abi_long __r = get_user_u16((x), (gaddr)); \ + if (!__r && arm_cpu_bswap_data(env)) { \ + (x) = bswap16(x); \ + } \ + __r; \ + }) + +#define put_user_data_u32(x, gaddr, env) \ + ({ typeof(x) __x = (x); \ + if (arm_cpu_bswap_data(env)) { \ + __x = bswap32(__x); \ + } \ + put_user_u32(__x, (gaddr)); \ + }) + +#define put_user_data_u16(x, gaddr, env) \ + ({ typeof(x) __x = (x); \ + if (arm_cpu_bswap_data(env)) { \ + __x = bswap16(__x); \ + } \ + put_user_u16(__x, (gaddr)); \ + }) + #ifdef TARGET_ABI32 /* Commpage handling -- there is no commpage for AArch64 */ @@ -610,11 +642,11 @@ static int do_strex(CPUARMState *env) segv = get_user_u8(val, addr); break; case 1: - segv = get_user_u16(val, addr); + segv = get_user_data_u16(val, addr, env); break; case 2: case 3: - segv = get_user_u32(val, addr); + segv = get_user_data_u32(val, addr, env); break; default: abort(); @@ -625,12 +657,16 @@ static int do_strex(CPUARMState *env) } if (size == 3) { uint32_t valhi; - segv = get_user_u32(valhi, addr + 4); + segv = get_user_data_u32(valhi, addr + 4, env); if (segv) { env->exception.vaddress = addr + 4; goto done; } - val = deposit64(val, 32, 32, valhi); + if (arm_cpu_bswap_data(env)) { + val = deposit64((uint64_t)valhi, 32, 32, val); + } else { + val = deposit64(val, 32, 32, valhi); + } } if (val != env->exclusive_val) { goto fail; @@ -642,11 +678,11 @@ static int do_strex(CPUARMState *env) segv = put_user_u8(val, addr); break; case 1: - segv = put_user_u16(val, addr); + segv = put_user_data_u16(val, addr, env); break; case 2: case 3: - segv = put_user_u32(val, addr); + segv = put_user_data_u32(val, addr, env); break; } if (segv) { @@ -655,7 +691,7 @@ static int do_strex(CPUARMState *env) } if (size == 3) { val = env->regs[(env->exclusive_info >> 12) & 0xf]; - segv = put_user_u32(val, addr + 4); + segv = put_user_data_u32(val, addr + 4, env); if (segv) { env->exception.vaddress = addr + 4; goto done; -- cgit v1.1